Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

15 files changed, 6527 insertions, 0 deletions

diff --git a/src/VBox/Runtime/common/rest/Makefile.kup b/src/VBox/Runtime/common/rest/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/Makefile.kup
diff --git a/src/VBox/Runtime/common/rest/RTCRestAnyObject.cpp b/src/VBox/Runtime/common/rest/RTCRestAnyObject.cpp
new file mode 100644
index 00000000..cc202015
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestAnyObject.cpp
@@ -0,0 +1,606 @@
+/* $Id: RTCRestAnyObject.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestAnyObject implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restanyobject.h>
+
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/cpp/restoutput.h>
+
+
+
+/**
+ * Default constructor.
+ */
+RTCRestAnyObject::RTCRestAnyObject() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_pData(NULL)
+{
+    m_fNullIndicator = true;
+}
+
+
+/**
+ * Destructor.
+ */
+RTCRestAnyObject::~RTCRestAnyObject()
+{
+    if (m_pData)
+    {
+        delete m_pData;
+        m_pData = NULL;
+    }
+}
+
+
+/**
+ * Copy constructor.
+ */
+RTCRestAnyObject::RTCRestAnyObject(RTCRestAnyObject const &a_rThat)
+    : RTCRestObjectBase()
+    , m_pData(NULL)
+{
+    int rc = assignCopy(a_rThat);
+    if (RT_FAILURE(rc))
+        throw std::bad_alloc();
+}
+
+
+/**
+ * Copy assignment operator.
+ */
+RTCRestAnyObject &RTCRestAnyObject::operator=(RTCRestAnyObject const &a_rThat)
+{
+    int rc = assignCopy(a_rThat);
+    if (RT_FAILURE(rc))
+        throw std::bad_alloc();
+    return *this;
+}
+
+
+/**
+ * Safe copy assignment method.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestAnyObject const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    if (   !a_rThat.m_fNullIndicator
+        && a_rThat.m_pData != NULL)
+    {
+        kTypeClass enmType = a_rThat.m_pData->typeClass();
+        switch (enmType)
+        {
+            case kTypeClass_Bool:       return assignCopy(*(RTCRestBool const *)a_rThat.m_pData);
+            case kTypeClass_Int64:      return assignCopy(*(RTCRestInt64 const *)a_rThat.m_pData);
+            case kTypeClass_Int32:      return assignCopy(*(RTCRestInt32 const *)a_rThat.m_pData);
+            case kTypeClass_Int16:      return assignCopy(*(RTCRestInt16 const *)a_rThat.m_pData);
+            case kTypeClass_Double:     return assignCopy(*(RTCRestDouble const *)a_rThat.m_pData);
+            case kTypeClass_String:     return assignCopy(*(RTCRestString const *)a_rThat.m_pData);
+            case kTypeClass_Array:      return assignCopy(*(RTCRestArray<RTCRestAnyObject> const *)a_rThat.m_pData);
+            case kTypeClass_StringMap:  return assignCopy(*(RTCRestStringMap<RTCRestAnyObject> const *)a_rThat.m_pData);
+
+            /* Currently unused of invalid: */
+            case kTypeClass_Date:
+            case kTypeClass_Uuid:
+            case kTypeClass_Binary:
+            case kTypeClass_StringEnum:
+            case kTypeClass_AnyObject:
+            case kTypeClass_DataObject:
+            case kTypeClass_Invalid:
+                AssertFailedReturn(VERR_REST_INTERNAL_ERROR_7);
+        }
+    }
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Safe copy assignment method, boolean variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestBool const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestBool *pData = new (std::nothrow) RTCRestBool();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe copy assignment method, int64_t variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestInt64 const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestInt64 *pData = new (std::nothrow) RTCRestInt64();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe copy assignment method, int32_t variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestInt32 const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestInt32 *pData = new (std::nothrow) RTCRestInt32();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe copy assignment method, int16_t variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestInt16 const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestInt16 *pData = new (std::nothrow) RTCRestInt16();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe copy assignment method, double variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestDouble const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestDouble *pData = new (std::nothrow) RTCRestDouble();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe copy assignment method, string variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestString const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestString *pData = new (std::nothrow) RTCRestString();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe copy assignment method, array variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestArray<RTCRestAnyObject> const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestArray<RTCRestAnyObject> *pData = new (std::nothrow) RTCRestArray<RTCRestAnyObject>();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe copy assignment method, string map variant.
+ */
+int RTCRestAnyObject::assignCopy(RTCRestStringMap<RTCRestAnyObject> const &a_rThat) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestStringMap<RTCRestAnyObject> *pData = new (std::nothrow) RTCRestStringMap<RTCRestAnyObject>();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignCopy(a_rThat);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe value assignment method, boolean variant.
+ */
+int RTCRestAnyObject::assignValue(bool a_fValue) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestBool *pData = new (std::nothrow) RTCRestBool();
+    if (pData)
+    {
+        m_pData = pData;
+        pData->assignValue(a_fValue);
+        m_fNullIndicator = false;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe value assignment method, int64_t variant.
+ */
+int RTCRestAnyObject::assignValue(int64_t a_iValue) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestInt64 *pData = new (std::nothrow) RTCRestInt64();
+    if (pData)
+    {
+        m_pData = pData;
+        pData->assignValue(a_iValue);
+        m_fNullIndicator = false;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe value assignment method, int32_t variant.
+ */
+int RTCRestAnyObject::assignValue(int32_t a_iValue) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestInt32 *pData = new (std::nothrow) RTCRestInt32();
+    if (pData)
+    {
+        m_pData = pData;
+        pData->assignValue(a_iValue);
+        m_fNullIndicator = false;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe value assignment method, int16_t variant.
+ */
+int RTCRestAnyObject::assignValue(int16_t a_iValue) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestInt16 *pData = new (std::nothrow) RTCRestInt16();
+    if (pData)
+    {
+        m_pData = pData;
+        pData->assignValue(a_iValue);
+        m_fNullIndicator = false;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe value assignment method, double variant.
+ */
+int RTCRestAnyObject::assignValue(double a_iValue) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestDouble *pData = new (std::nothrow) RTCRestDouble();
+    if (pData)
+    {
+        m_pData = pData;
+        pData->assignValue(a_iValue);
+        m_fNullIndicator = false;
+        return VINF_SUCCESS;
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe value assignment method, string variant.
+ */
+int RTCRestAnyObject::assignValue(RTCString const &a_rValue) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestString *pData = new (std::nothrow) RTCRestString();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignNoThrow(a_rValue);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+/**
+ * Safe value assignment method, C-string variant.
+ */
+int RTCRestAnyObject::assignValue(const char *a_pszValue) RT_NOEXCEPT
+{
+    setNull();
+    RTCRestString *pData = new (std::nothrow) RTCRestString();
+    if (pData)
+    {
+        m_pData = pData;
+        m_fNullIndicator = false;
+        return pData->assignNoThrow(a_pszValue);
+    }
+    return VERR_NO_MEMORY;
+}
+
+
+RTCRestObjectBase *RTCRestAnyObject::baseClone() const RT_NOEXCEPT
+{
+    RTCRestAnyObject *pClone = new (std::nothrow) RTCRestAnyObject();
+    if (pClone)
+    {
+        int rc = pClone->assignCopy(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestAnyObject::setNull(void) RT_NOEXCEPT
+{
+    if (m_pData)
+    {
+        delete m_pData;
+        m_pData = NULL;
+    }
+    return RTCRestObjectBase::setNull();
+}
+
+
+int RTCRestAnyObject::resetToDefault() RT_NOEXCEPT
+{
+    if (m_pData)
+        return m_pData->resetToDefault();
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestAnyObject::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (m_pData)
+        return m_pData->serializeAsJson(a_rDst);
+    a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestAnyObject::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    setNull();
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    switch (enmType)
+    {
+        case RTJSONVALTYPE_OBJECT:
+        {
+            RTCRestStringMap<RTCRestAnyObject> *pMap = new (std::nothrow) RTCRestStringMap<RTCRestAnyObject>();
+            if (pMap)
+            {
+                m_pData = pMap;
+                m_fNullIndicator = false;
+                return pMap->deserializeFromJson(a_rCursor);
+            }
+            break;
+        }
+
+        case RTJSONVALTYPE_ARRAY:
+        {
+            RTCRestArray<RTCRestAnyObject> *pArray = new (std::nothrow) RTCRestArray<RTCRestAnyObject>();
+            if (pArray)
+            {
+                m_pData = pArray;
+                m_fNullIndicator = false;
+                return pArray->deserializeFromJson(a_rCursor);
+            }
+            break;
+        }
+
+        case RTJSONVALTYPE_STRING:
+        {
+            RTCRestString *pString = new (std::nothrow) RTCRestString();
+            if (pString)
+            {
+                m_pData = pString;
+                m_fNullIndicator = false;
+                return pString->deserializeFromJson(a_rCursor);
+            }
+            break;
+        }
+
+        case RTJSONVALTYPE_INTEGER:
+        {
+            RTCRestInt64 *pInt64 = new (std::nothrow) RTCRestInt64();
+            if (pInt64)
+            {
+                m_pData = pInt64;
+                m_fNullIndicator = false;
+                return pInt64->deserializeFromJson(a_rCursor);
+            }
+            break;
+        }
+
+        case RTJSONVALTYPE_NUMBER:
+        {
+            RTCRestDouble *pDouble = new (std::nothrow) RTCRestDouble();
+            if (pDouble)
+            {
+                m_pData = pDouble;
+                m_fNullIndicator = false;
+                return pDouble->deserializeFromJson(a_rCursor);
+            }
+            break;
+        }
+
+        case RTJSONVALTYPE_NULL:
+            return VINF_SUCCESS;
+
+        case RTJSONVALTYPE_TRUE:
+        case RTJSONVALTYPE_FALSE:
+        {
+            RTCRestBool *pBool = new (std::nothrow) RTCRestBool();
+            if (pBool)
+            {
+                m_pData = pBool;
+                m_fNullIndicator = false;
+                pBool->assignValue(enmType == RTJSONVALTYPE_TRUE);
+                return VINF_SUCCESS;
+            }
+            break;
+        }
+
+        /* no break. */
+        case RTJSONVALTYPE_INVALID:
+        case RTJSONVALTYPE_32BIT_HACK:
+            break;
+    }
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_WRONG_TYPE, "RTCRestAnyObject found %d (%s)",
+                                          enmType, RTJsonValueTypeName(enmType));
+}
+
+
+int RTCRestAnyObject::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    if (m_pData)
+        return m_pData->toString(a_pDst, a_fFlags);
+    if (a_fFlags & kToString_Append)
+        return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+    return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+}
+
+
+int RTCRestAnyObject::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                                 uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    return RTCRestObjectBase::fromString(a_rValue, a_pszName, a_pErrInfo, a_fFlags);
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestAnyObject::typeClass(void) const RT_NOEXCEPT
+{
+    return kTypeClass_AnyObject;
+}
+
+
+const char *RTCRestAnyObject::typeName(void) const RT_NOEXCEPT
+{
+    if (m_pData)
+    {
+        kTypeClass enmType = m_pData->typeClass();
+        switch (enmType)
+        {
+            case kTypeClass_Bool:       return "RTCRestAnyObject[Bool]";
+            case kTypeClass_Int64:      return "RTCRestAnyObject[Int64]";
+            case kTypeClass_Int32:      return "RTCRestAnyObject[Int32]";
+            case kTypeClass_Int16:      return "RTCRestAnyObject[Int16]";
+            case kTypeClass_Double:     return "RTCRestAnyObject[Double]";
+            case kTypeClass_String:     return "RTCRestAnyObject[String]";
+            case kTypeClass_Array:      return "RTCRestAnyObject[Array]";
+            case kTypeClass_StringMap:  return "RTCRestAnyObject[StringMap]";
+
+            /* Currently unused of invalid: */
+            case kTypeClass_Date:
+            case kTypeClass_Uuid:
+            case kTypeClass_Binary:
+            case kTypeClass_StringEnum:
+            case kTypeClass_DataObject:
+            case kTypeClass_AnyObject:
+            case kTypeClass_Invalid:
+                AssertFailed();
+        }
+    }
+    return "RTCRestAnyObject";
+}
+
+
+/**
+ * Factory method.
+ */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestAnyObject::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestAnyObject();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestAnyObject::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance)
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestArrayBase.cpp b/src/VBox/Runtime/common/rest/RTCRestArrayBase.cpp
new file mode 100644
index 00000000..5bd22717
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestArrayBase.cpp
@@ -0,0 +1,496 @@
+/* $Id: RTCRestArrayBase.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestArrayBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restarray.h>
+
+#include <iprt/err.h>
+#include <iprt/string.h>
+#include <iprt/cpp/restoutput.h>
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+/** Separator characters. */
+static char const g_szSep[RTCRestObjectBase::kCollectionFormat_Mask + 1] = ",, \t|,,";
+
+
+/**
+ * Default destructor.
+ */
+RTCRestArrayBase::RTCRestArrayBase() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_papElements(NULL)
+    , m_cElements(0)
+    , m_cCapacity(0)
+{
+}
+
+
+#if 0 /* should not be used */
+/**
+ * Copy constructor.
+ */
+RTCRestArrayBase::RTCRestArrayBase(RTCRestArrayBase const &a_rThat);
+#endif
+
+/**
+ * Destructor.
+ */
+RTCRestArrayBase::~RTCRestArrayBase()
+{
+    clear();
+
+    if (m_papElements)
+    {
+        RTMemFree(m_papElements);
+        m_papElements = NULL;
+        m_cCapacity = 0;
+    }
+}
+
+
+#if 0 /* should not be used */
+/**
+ * Copy assignment operator.
+ */
+RTCRestArrayBase &RTCRestArrayBase::operator=(RTCRestArrayBase const &a_rThat);
+#endif
+
+
+/*********************************************************************************************************************************
+*   Overridden methods                                                                                                           *
+*********************************************************************************************************************************/
+
+RTCRestObjectBase *RTCRestArrayBase::baseClone() const RT_NOEXCEPT
+{
+    RTCRestArrayBase *pClone = createClone();
+    if (pClone)
+    {
+        int rc = pClone->copyArrayWorkerNoThrow(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestArrayBase::resetToDefault() RT_NOEXCEPT
+{
+    /* The default state of an array is empty. At least for now. */
+    clear();
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestArrayBase::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+    {
+        uint32_t const uOldState = a_rDst.beginArray();
+        for (size_t i = 0; i < m_cElements; i++)
+        {
+            a_rDst.valueSeparator();
+            m_papElements[i]->serializeAsJson(a_rDst);
+        }
+        a_rDst.endArray(uOldState);
+    }
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestArrayBase::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    /*
+     * Make sure the object starts out with an empty map.
+     */
+    if (m_cElements > 0)
+        clear();
+    m_fNullIndicator = false;
+
+    /*
+     * Iterate the array values.
+     */
+    RTJSONIT hIterator;
+    int rcRet = RTJsonIteratorBeginArray(a_rCursor.m_hValue, &hIterator);
+    if (RT_SUCCESS(rcRet))
+    {
+        for (size_t idxName = 0;; idxName++)
+        {
+            /* Setup sub-cursor. */
+            RTCRestJsonCursor SubCursor(a_rCursor);
+            int rc = RTJsonIteratorQueryValue(hIterator, &SubCursor.m_hValue, &SubCursor.m_pszName);
+            if (RT_SUCCESS(rc))
+            {
+                char szName[32];
+                RTStrPrintf(szName, sizeof(szName), "[%u]", idxName);
+                SubCursor.m_pszName = szName;
+
+                /* Call the static deserializeInstanceFromJson method of the value class.  */
+                RTCRestObjectBase *pObj = NULL;
+                rc = deserializeValueInstanceFromJson(SubCursor, &pObj);
+                if (RT_SUCCESS(rc))
+                    Assert(pObj);
+                else if (RT_SUCCESS(rcRet))
+                    rcRet = rc;
+                if (pObj)
+                {
+                    rc = insertWorker(~(size_t)0, pObj, false /*a_fReplace*/);
+                    if (RT_SUCCESS(rc))
+                    { /* likely */ }
+                    else
+                    {
+                        rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "Array insert failed (index %zu): %Rrc",
+                                                               idxName, rc);
+                        delete pObj;
+                    }
+                }
+            }
+            else
+                rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonIteratorQueryValue failed: %Rrc", rc);
+
+            /*
+             * Advance.
+             */
+            rc = RTJsonIteratorNext(hIterator);
+            if (RT_SUCCESS(rc))
+            { /* likely */ }
+            else if (rc == VERR_JSON_ITERATOR_END)
+                break;
+            else
+            {
+                rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonIteratorNext failed: %Rrc", rc);
+                break;
+            }
+        }
+
+        RTJsonIteratorFree(hIterator);
+    }
+    else if (rcRet == VERR_JSON_IS_EMPTY)
+        rcRet = VINF_SUCCESS;
+    else if (   rcRet == VERR_JSON_VALUE_INVALID_TYPE
+             && RTJsonValueGetType(a_rCursor.m_hValue) == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        rcRet = VINF_SUCCESS;
+    }
+    else
+        rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rcRet,
+                                               "RTJsonIteratorBeginrray failed: %Rrc (type %s)",
+                                               rcRet, RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+    return rcRet;
+
+}
+
+
+int RTCRestArrayBase::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    int rc;
+    if (!m_fNullIndicator)
+    {
+        if (m_cElements)
+        {
+            char const chSep = g_szSep[a_fFlags & kCollectionFormat_Mask];
+
+            rc = m_papElements[0]->toString(a_pDst, a_fFlags);
+            for (size_t i = 1; RT_SUCCESS(rc) && i < m_cElements; i++)
+            {
+                rc = a_pDst->appendNoThrow(chSep);
+                if (RT_SUCCESS(rc))
+                    rc = m_papElements[i]->toString(a_pDst, a_fFlags | kToString_Append);
+            }
+        }
+        else
+        {
+            if (!(a_fFlags & kToString_Append))
+                a_pDst->setNull();
+            rc = VINF_SUCCESS;
+        }
+    }
+    else if (a_fFlags & kToString_Append)
+        rc = a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+    else
+        rc = a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+
+    return rc;
+}
+
+
+int RTCRestArrayBase::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                                 uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    /*
+     * Clear the array.  If the string is empty, we have an empty array and is done.
+     */
+    if (!(a_fFlags & kToString_Append))
+        clear();
+    if (a_rValue.isEmpty())
+        return VINF_SUCCESS;
+
+    /*
+     * Look for a separator so we don't mistake a initial null element for a null array.
+     */
+    char const chSep = g_szSep[a_fFlags & kCollectionFormat_Mask];
+    size_t offSep = a_rValue.find(chSep);
+    if (   offSep != RTCString::npos
+        || !a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+    {
+        RTCString strTmp;
+        size_t    offStart = 0;
+        int       rcRet    = VINF_SUCCESS;
+        for (;;)
+        {
+            /* Copy the element value into its own string buffer. */
+            int rc = strTmp.assignNoThrow(a_rValue, offStart, (offSep == RTCString::npos ? a_rValue.length() : offSep) - offStart);
+            AssertRCReturn(rc, rc);
+
+            /* Create a new element, insert it and pass it the value string. */
+            RTCRestObjectBase *pObj = createValue();
+            AssertPtrReturn(pObj, VERR_NO_MEMORY);
+
+            rc = insertWorker(~(size_t)0, pObj, false);
+            AssertRCReturnStmt(rc, delete pObj, rc);
+
+            char szName[128];
+            RTStrPrintf(szName, sizeof(szName), "%.*s[%zu]", 116, a_pszName ? a_pszName : "", size());
+            rc = pObj->fromString(strTmp, a_pszName, a_pErrInfo, 0);
+            if (RT_SUCCESS(rc))
+            { /* likely */ }
+            else if (RT_SUCCESS(rcRet))
+                rcRet = rc;
+
+            /*
+             * Done? Otherwise advance.
+             */
+            if (offSep == RTCString::npos)
+                break;
+            offStart = offSep + 1;
+            offSep = a_rValue.find(chSep, offStart);
+        }
+        return rcRet;
+    }
+
+    /*
+     * Consider this a null array even if it could also be an array with a single
+     * null element.  This is just an artifact of an imperfect serialization format.
+     */
+    setNull();
+    return VINF_SUCCESS;
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestArrayBase::typeClass(void) const RT_NOEXCEPT
+{
+    return kTypeClass_Array;
+}
+
+
+const char *RTCRestArrayBase::typeName(void) const RT_NOEXCEPT
+{
+    return "RTCRestArray<ElementType>";
+}
+
+
+
+/*********************************************************************************************************************************
+*   Array methods                                                                                                                *
+*********************************************************************************************************************************/
+
+void RTCRestArrayBase::clear() RT_NOEXCEPT
+{
+    size_t i = m_cElements;
+    while (i-- > 0)
+    {
+        delete m_papElements[i];
+        m_papElements[i] = NULL;
+    }
+    m_cElements = 0;
+    m_fNullIndicator = false;
+}
+
+
+bool RTCRestArrayBase::removeAt(size_t a_idx) RT_NOEXCEPT
+{
+    if (a_idx == ~(size_t)0)
+        a_idx = m_cElements - 1;
+    if (a_idx < m_cElements)
+    {
+        delete m_papElements[a_idx];
+        m_papElements[a_idx] = NULL;
+
+        m_cElements--;
+        if (a_idx < m_cElements)
+            memmove(&m_papElements[a_idx], &m_papElements[a_idx + 1], (m_cElements - a_idx) * sizeof(m_papElements[0]));
+    }
+    return false;
+}
+
+
+int RTCRestArrayBase::ensureCapacity(size_t a_cEnsureCapacity) RT_NOEXCEPT
+{
+    if (m_cCapacity < a_cEnsureCapacity)
+    {
+        if (a_cEnsureCapacity < 512)
+            a_cEnsureCapacity = RT_ALIGN_Z(a_cEnsureCapacity, 16);
+        else if (a_cEnsureCapacity < 16384)
+            a_cEnsureCapacity = RT_ALIGN_Z(a_cEnsureCapacity, 128);
+        else
+            a_cEnsureCapacity = RT_ALIGN_Z(a_cEnsureCapacity, 512);
+
+        void *pvNew = RTMemRealloc(m_papElements, sizeof(m_papElements[0]) * a_cEnsureCapacity);
+        if (pvNew)
+        {
+            m_papElements = (RTCRestObjectBase **)pvNew;
+            memset(&m_papElements[m_cCapacity], 0, (a_cEnsureCapacity - m_cCapacity) * sizeof(sizeof(m_papElements[0])));
+            m_cCapacity   = a_cEnsureCapacity;
+        }
+        else
+            return VERR_NO_MEMORY;
+    }
+    return VINF_SUCCESS;
+}
+
+
+int RTCRestArrayBase::copyArrayWorkerNoThrow(RTCRestArrayBase const &a_rThat) RT_NOEXCEPT
+{
+    int rc;
+    clear();
+    if (a_rThat.m_cElements == 0)
+    {
+        m_fNullIndicator = a_rThat.m_fNullIndicator;
+        rc = VINF_SUCCESS;
+    }
+    else
+    {
+        Assert(!a_rThat.m_fNullIndicator);
+        rc = ensureCapacity(a_rThat.m_cElements);
+        if (RT_SUCCESS(rc))
+        {
+            for (size_t i = 0; i < a_rThat.m_cElements; i++)
+            {
+                AssertPtr(a_rThat.m_papElements[i]);
+                rc = insertCopyWorker(i, *a_rThat.m_papElements[i], false);
+                if (RT_SUCCESS(rc))
+                { /* likely */ }
+                else
+                    return rc;
+            }
+        }
+    }
+    return rc;
+}
+
+void RTCRestArrayBase::copyArrayWorkerMayThrow(RTCRestArrayBase const &a_rThat)
+{
+    int rc = copyArrayWorkerNoThrow(a_rThat);
+    if (RT_SUCCESS(rc))
+        return;
+    throw std::bad_alloc();
+}
+
+
+int RTCRestArrayBase::insertWorker(size_t a_idx, RTCRestObjectBase *a_pValue, bool a_fReplace) RT_NOEXCEPT
+{
+    AssertPtrReturn(a_pValue, VERR_INVALID_POINTER);
+
+    if (a_idx == ~(size_t)0)
+        a_idx = m_cElements;
+
+    if (a_idx <= m_cElements)
+    {
+        if (a_idx == m_cElements || !a_fReplace)
+        {
+            /* Make sure we've got array space. */
+            if (m_cElements + 1 < m_cCapacity)
+            { /* kind of likely */ }
+            else
+            {
+                int rc = ensureCapacity(m_cElements + 1);
+                if (RT_SUCCESS(rc))
+                { /* likely */ }
+                else
+                    return rc;
+            }
+
+            /* Shift following elements before inserting. */
+            if (a_idx < m_cElements)
+                memmove(&m_papElements[a_idx + 1], &m_papElements[a_idx], (m_cElements - a_idx) * sizeof(m_papElements[0]));
+            m_papElements[a_idx] = a_pValue;
+            m_cElements++;
+#ifdef RT_STRICT
+            for (size_t i = 0; i < m_cElements; i++)
+                AssertPtr(m_papElements[i]);
+#endif
+            m_fNullIndicator = false;
+            return VINF_SUCCESS;
+        }
+
+        /* Replace element. */
+        delete m_papElements[a_idx];
+        m_papElements[a_idx] = a_pValue;
+        m_fNullIndicator = false;
+        return VWRN_ALREADY_EXISTS;
+    }
+    return VERR_OUT_OF_RANGE;
+}
+
+
+int RTCRestArrayBase::insertCopyWorker(size_t a_idx, RTCRestObjectBase const &a_rValue, bool a_fReplace) RT_NOEXCEPT
+{
+    int rc;
+    RTCRestObjectBase *pValueCopy = a_rValue.baseClone();
+    if (pValueCopy)
+    {
+        rc = insertWorker(a_idx, pValueCopy, a_fReplace);
+        if (RT_SUCCESS(rc))
+        { /* likely */ }
+        else
+            delete pValueCopy;
+    }
+    else
+        rc = VERR_NO_MEMORY;
+    return rc;
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestClientApiBase.cpp b/src/VBox/Runtime/common/rest/RTCRestClientApiBase.cpp
new file mode 100644
index 00000000..e865f97a
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestClientApiBase.cpp
@@ -0,0 +1,326 @@
+/* $Id: RTCRestClientApiBase.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestClientApiBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restclient.h>
+
+#include <iprt/assert.h>
+#include <iprt/ctype.h>
+#include <iprt/errcore.h>
+#include <iprt/http.h>
+#include <iprt/log.h>
+#include <iprt/uri.h>
+
+
+/**
+ * Default constructor.
+ */
+RTCRestClientApiBase::RTCRestClientApiBase() RT_NOEXCEPT
+    : m_hHttp(NIL_RTHTTP)
+{
+}
+
+
+/**
+ * The destructor.
+ */
+RTCRestClientApiBase::~RTCRestClientApiBase()
+{
+    if (m_hHttp != NIL_RTHTTP)
+    {
+        int rc = RTHttpDestroy(m_hHttp);
+        AssertRC(rc);
+        m_hHttp = NIL_RTHTTP;
+    }
+}
+
+
+int RTCRestClientApiBase::setCAFile(const char *pcszCAFile) RT_NOEXCEPT
+{
+    return m_strCAFile.assignNoThrow(pcszCAFile);
+}
+
+
+int RTCRestClientApiBase::setCAFile(const RTCString &strCAFile) RT_NOEXCEPT
+{
+    return m_strCAFile.assignNoThrow(strCAFile);
+}
+
+
+const char *RTCRestClientApiBase::getServerUrl(void) const RT_NOEXCEPT
+{
+    if (m_strServerUrl.isEmpty())
+        return getDefaultServerUrl();
+    return m_strServerUrl.c_str();
+}
+
+
+int RTCRestClientApiBase::setServerUrl(const char *a_pszUrl) RT_NOEXCEPT
+{
+#ifdef RT_STRICT
+    if (a_pszUrl)
+    {
+        RTURIPARSED Parsed;
+        int rc = RTUriParse(a_pszUrl, &Parsed);
+        AssertRC(rc);
+    }
+#endif
+
+    return m_strServerUrl.assignNoThrow(a_pszUrl);
+}
+
+
+int RTCRestClientApiBase::setServerUrlPart(const char *a_pszServerUrl, size_t a_offDst, size_t a_cchDst,
+                                           const char *a_pszSrc, size_t a_cchSrc) RT_NOEXCEPT
+{
+    if (   a_cchDst == a_cchSrc
+        && memcmp(&a_pszServerUrl[0], a_pszSrc, a_cchSrc) == 0)
+        return VINF_SUCCESS;
+
+    if (m_strServerUrl.isEmpty())
+    {
+        int rc = m_strServerUrl.assignNoThrow(a_pszServerUrl);
+        AssertRCReturn(rc, rc);
+    }
+    return m_strServerUrl.replaceNoThrow(a_offDst, a_cchDst, a_pszSrc, a_cchSrc);
+}
+
+
+int RTCRestClientApiBase::setServerScheme(const char *a_pszScheme) RT_NOEXCEPT
+{
+    /*
+     * Validate.
+     */
+    AssertReturn(a_pszScheme, VERR_INVALID_POINTER);
+    size_t const cchScheme = strlen(a_pszScheme);
+    AssertReturn(cchScheme > 0, VERR_INVALID_PARAMETER);
+    Assert(cchScheme < 16);
+#ifdef RT_STRICT
+    for (size_t i = 0; i < cchScheme; i++)
+        Assert(RT_C_IS_ALNUM(a_pszScheme[i]));
+#endif
+
+    /*
+     * Parse, compare & replace.
+     */
+    RTURIPARSED Parsed;
+    const char *pszUrl = getServerUrl();
+    int rc = RTUriParse(pszUrl, &Parsed);
+    AssertRCReturn(rc, rc);
+    return setServerUrlPart(pszUrl, 0, Parsed.cchScheme, a_pszScheme, cchScheme);
+}
+
+
+int RTCRestClientApiBase::setServerAuthority(const char *a_pszAuthority) RT_NOEXCEPT
+{
+    /*
+     * Validate.
+     */
+    AssertReturn(a_pszAuthority, VERR_INVALID_POINTER);
+    size_t const cchAuthority = strlen(a_pszAuthority);
+    AssertReturn(cchAuthority > 0, VERR_INVALID_PARAMETER);
+    Assert(memchr(a_pszAuthority, '/', cchAuthority) == NULL);
+    Assert(memchr(a_pszAuthority, '\\', cchAuthority) == NULL);
+    Assert(memchr(a_pszAuthority, '#', cchAuthority) == NULL);
+    Assert(memchr(a_pszAuthority, '?', cchAuthority) == NULL);
+
+    /*
+     * Parse, compare & replace.
+     */
+    RTURIPARSED Parsed;
+    const char *pszUrl = getServerUrl();
+    int rc = RTUriParse(pszUrl, &Parsed);
+    AssertRCReturn(rc, rc);
+    return setServerUrlPart(pszUrl, Parsed.offAuthority, Parsed.cchAuthority, a_pszAuthority, cchAuthority);
+}
+
+
+int RTCRestClientApiBase::setServerBasePath(const char *a_pszBasePath) RT_NOEXCEPT
+{
+    /*
+     * Validate.
+     */
+    AssertReturn(a_pszBasePath, VERR_INVALID_POINTER);
+    size_t const cchBasePath = strlen(a_pszBasePath);
+    AssertReturn(cchBasePath > 0, VERR_INVALID_PARAMETER);
+    Assert(memchr(a_pszBasePath, '?', cchBasePath) == NULL);
+    Assert(memchr(a_pszBasePath, '#', cchBasePath) == NULL);
+
+    /*
+     * Parse, compare & replace.
+     */
+    RTURIPARSED Parsed;
+    const char *pszUrl = getServerUrl();
+    int rc = RTUriParse(pszUrl, &Parsed);
+    AssertRCReturn(rc, rc);
+    return setServerUrlPart(pszUrl, Parsed.offPath, Parsed.cchPath, a_pszBasePath, cchBasePath);
+}
+
+
+int RTCRestClientApiBase::reinitHttpInstance() RT_NOEXCEPT
+{
+    if (m_hHttp != NIL_RTHTTP)
+        return RTHttpReset(m_hHttp, 0 /*fFlags*/);
+
+    int rc = RTHttpCreate(&m_hHttp);
+    if (RT_SUCCESS(rc) && m_strCAFile.isNotEmpty())
+        rc = RTHttpSetCAFile(m_hHttp, m_strCAFile.c_str());
+
+    if (RT_FAILURE(rc) && m_hHttp != NIL_RTHTTP)
+    {
+        RTHttpDestroy(m_hHttp);
+        m_hHttp = NIL_RTHTTP;
+    }
+    return rc;
+}
+
+
+int RTCRestClientApiBase::xmitReady(RTHTTP a_hHttp, RTCString const &a_rStrFullUrl, RTHTTPMETHOD a_enmHttpMethod,
+                                    RTCString const &a_rStrXmitBody, uint32_t a_fFlags) RT_NOEXCEPT
+{
+    RT_NOREF(a_hHttp, a_rStrFullUrl, a_enmHttpMethod, a_rStrXmitBody, a_fFlags);
+    return VINF_SUCCESS;
+}
+
+
+int RTCRestClientApiBase::doCall(RTCRestClientRequestBase const &a_rRequest, RTHTTPMETHOD a_enmHttpMethod,
+                                 RTCRestClientResponseBase *a_pResponse, const char *a_pszMethod, uint32_t a_fFlags) RT_NOEXCEPT
+{
+    LogFlow(("doCall: %s %s\n", a_pszMethod, RTHttpMethodToStr(a_enmHttpMethod)));
+
+
+    /*
+     * Reset the response object (allowing reuse of such) and check the request
+     * object for assignment errors.
+     */
+    int    rc;
+    RTHTTP hHttp = NIL_RTHTTP;
+
+    a_pResponse->reset();
+    if (!a_rRequest.hasAssignmentErrors())
+    {
+        /*
+         * Initialize the HTTP instance.
+         */
+        rc = reinitHttpInstance();
+        if (RT_SUCCESS(rc))
+        {
+            hHttp = m_hHttp;
+            Assert(hHttp != NIL_RTHTTP);
+
+            /*
+             * Prepare the response side.
+             */
+            rc = a_pResponse->receivePrepare(hHttp);
+            if (RT_SUCCESS(rc))
+            {
+                /*
+                 * Prepare the request for the transmission.
+                 */
+                RTCString strExtraPath;
+                RTCString strQuery;
+                RTCString strXmitBody;
+                rc = a_rRequest.xmitPrepare(&strExtraPath, &strQuery, hHttp, &strXmitBody);
+                if (RT_SUCCESS(rc))
+                {
+                    /*
+                     * Construct the full URL.
+                     */
+                    RTCString strFullUrl;
+                    rc = strFullUrl.assignNoThrow(getServerUrl());
+                    if (strExtraPath.isNotEmpty())
+                    {
+                        if (!strExtraPath.startsWith("/") && !strFullUrl.endsWith("/") && RT_SUCCESS(rc))
+                            rc = strFullUrl.appendNoThrow('/');
+                        if (RT_SUCCESS(rc))
+                            rc = strFullUrl.appendNoThrow(strExtraPath);
+                        strExtraPath.setNull();
+                    }
+                    if (strQuery.isNotEmpty())
+                    {
+                        Assert(strQuery.startsWith("?"));
+                        rc = strFullUrl.appendNoThrow(strQuery);
+                        strQuery.setNull();
+                    }
+                    if (RT_SUCCESS(rc))
+                    {
+                        rc = xmitReady(hHttp, strFullUrl, a_enmHttpMethod, strXmitBody, a_fFlags);
+                        if (RT_SUCCESS(rc))
+                        {
+                            /*
+                             * Perform HTTP request.
+                             */
+                            uint32_t uHttpStatus = 0;
+                            size_t   cbBody      = 0;
+                            void    *pvBody      = NULL;
+                            rc = RTHttpPerform(hHttp, strFullUrl.c_str(), a_enmHttpMethod,
+                                               strXmitBody.c_str(), strXmitBody.length(),
+                                               &uHttpStatus, NULL /*ppvHdrs*/, NULL /*pcbHdrs*/, &pvBody, &cbBody);
+                            if (RT_SUCCESS(rc))
+                            {
+                                a_rRequest.xmitComplete(uHttpStatus, hHttp);
+
+                                /*
+                                 * Do response processing.
+                                 */
+                                a_pResponse->receiveComplete(uHttpStatus, hHttp);
+                                a_pResponse->consumeBody((const char *)pvBody, cbBody);
+                                if (pvBody)
+                                    RTHttpFreeResponse(pvBody);
+                                a_pResponse->receiveFinal();
+
+                                return a_pResponse->getStatus();
+                            }
+                        }
+                    }
+                }
+                a_rRequest.xmitComplete(rc, hHttp);
+            }
+        }
+    }
+    else
+        rc = VERR_NO_MEMORY;
+
+    a_pResponse->receiveComplete(rc, hHttp);
+    RT_NOREF_PV(a_pszMethod);
+
+    return a_pResponse->getStatus();
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestClientApiBaseOci.cpp b/src/VBox/Runtime/common/rest/RTCRestClientApiBaseOci.cpp
new file mode 100644
index 00000000..6cfb2815
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestClientApiBaseOci.cpp
@@ -0,0 +1,185 @@
+/* $Id: RTCRestClientApiBaseOci.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestClientApiBase implementation, OCI specific bits.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restclient.h>
+
+#include <iprt/assert.h>
+#include <iprt/base64.h>
+#include <iprt/errcore.h>
+#include <iprt/http.h>
+#include <iprt/log.h>
+#include <iprt/sha.h>
+#include <iprt/time.h>
+#include <iprt/uri.h>
+
+
+
+/**
+ * Ensures that we've got an 'X-Date' or 'Date' header.
+ *
+ * @returns IPRT status code.
+ * @param   hHttp       The HTTP client handle.
+ * @param   pvContent
+ */
+static int ociSignRequestEnsureDateOrXDate(RTHTTP hHttp) RT_NOEXCEPT
+{
+    if (RTHttpGetHeader(hHttp, RT_STR_TUPLE("x-date")))
+        return VINF_SUCCESS;
+    if (RTHttpGetHeader(hHttp, RT_STR_TUPLE("date")))
+        return VINF_SUCCESS;
+
+    RTTIMESPEC NowSpec;
+    RTTIME     Now;
+    char       szDate[RTTIME_RFC2822_LEN];
+    ssize_t cch = RTTimeToRfc2822(RTTimeExplode(&Now, RTTimeNow(&NowSpec)), szDate, sizeof(szDate), RTTIME_RFC2822_F_GMT);
+    AssertRCReturn((int)cch, (int)cch);
+
+    return RTHttpAddHeader(hHttp, "x-date", szDate, cch, RTHTTPADDHDR_F_BACK);
+}
+
+
+/**
+ * Ensures that we've got a 'x-content-sha256' header.
+ *
+ * @returns IPRT status code.
+ * @param   hHttp       The HTTP client handle.
+ * @param   pvContent
+ */
+static int ociSignRequestEnsureXContentSha256(RTHTTP hHttp, void const *pvContent, size_t cbContent) RT_NOEXCEPT
+{
+    if (RTHttpGetHeader(hHttp, RT_STR_TUPLE("x-content-sha256")))
+        return VINF_SUCCESS;
+
+#ifdef RT_STRICT
+    if (cbContent != 0)
+    {
+        const char *pszContentLength = RTHttpGetHeader(hHttp, RT_STR_TUPLE("Content-Length"));
+        Assert(pszContentLength);
+        AssertMsg(!pszContentLength || RTStrToUInt64(pszContentLength) == cbContent,
+                  ("'%s' vs %RU64\n", pszContentLength, cbContent));
+    }
+#endif
+
+    uint8_t abHash[RTSHA256_HASH_SIZE];
+    RTSha256(pvContent, cbContent, abHash);
+
+    char szBase64[RTSHA256_DIGEST_LEN + 1]; /* (base64 should be shorter) */
+    int rc = RTBase64EncodeEx(abHash, sizeof(abHash), RTBASE64_FLAGS_NO_LINE_BREAKS, szBase64, sizeof(szBase64), NULL);
+    AssertRCReturn(rc, rc);
+
+    return RTHttpAddHeader(hHttp, "x-content-sha256", szBase64, RTSTR_MAX, RTHTTPADDHDR_F_BACK);
+}
+
+
+/**
+ * Ensures that we've got a 'Content-Length' header.
+ *
+ * @returns IPRT status code.
+ * @param   hHttp       The HTTP client handle.
+ * @param   cbContent   The content length.
+ */
+static int ociSignRequestEnsureContentLength(RTHTTP hHttp, uint64_t cbContent) RT_NOEXCEPT
+{
+    if (RTHttpGetHeader(hHttp, RT_STR_TUPLE("Content-Length")))
+        return VINF_SUCCESS;
+    char    szValue[64];
+    ssize_t cchValue = RTStrFormatU64(szValue, sizeof(szValue), cbContent, 10, 0, 0, 0);
+    AssertRCReturn((int)cchValue, (int)cchValue);
+    return RTHttpAddHeader(hHttp, "Content-Length", szValue, cchValue, RTHTTPADDHDR_F_BACK);
+}
+
+
+/**
+ * Ensures that we've got a host header.
+ *
+ * @returns IPRT status code.
+ * @param   hHttp       The HTTP client handle.
+ * @param   pszUrl      The URL.
+ */
+static int ociSignRequestEnsureHost(RTHTTP hHttp, const char *pszUrl) RT_NOEXCEPT
+{
+    if (RTHttpGetHeader(hHttp, RT_STR_TUPLE("host")))
+        return VINF_SUCCESS;
+
+    RTURIPARSED ParsedUrl;
+    int rc = RTUriParse(pszUrl, &ParsedUrl);
+    AssertRCReturn(rc, rc);
+
+    return RTHttpAddHeader(hHttp, "host", &pszUrl[ParsedUrl.offAuthorityHost], ParsedUrl.cchAuthorityHost, RTHTTPADDHDR_F_BACK);
+}
+
+
+int RTCRestClientApiBase::ociSignRequest(RTHTTP a_hHttp, RTCString const &a_rStrFullUrl, RTHTTPMETHOD a_enmHttpMethod,
+                                         RTCString const &a_rStrXmitBody, uint32_t a_fFlags,
+                                         RTCRKEY a_hKey, RTCString const &a_rStrKeyId) RT_NOEXCEPT
+{
+    /*
+     * First make sure required headers are present, adding them as needed.
+     */
+    int rc = ociSignRequestEnsureHost(a_hHttp, a_rStrFullUrl.c_str());
+    if (RT_SUCCESS(rc))
+    {
+        bool fHasBody
+            =  a_rStrXmitBody.isNotEmpty()
+               /* but sometimes we need an empty body signed too */
+            || (a_fFlags & kDoCall_RequireBody)
+            || a_enmHttpMethod == RTHTTPMETHOD_POST
+            || a_enmHttpMethod == RTHTTPMETHOD_PUT;
+
+        if (fHasBody)
+        {
+            rc = ociSignRequestEnsureContentLength(a_hHttp, a_rStrXmitBody.length());
+            if (RT_SUCCESS(rc))
+                rc = ociSignRequestEnsureXContentSha256(a_hHttp, a_rStrXmitBody.c_str(), a_rStrXmitBody.length());
+        }
+        if (RT_SUCCESS(rc))
+            rc = ociSignRequestEnsureDateOrXDate(a_hHttp);
+        if (RT_SUCCESS(rc))
+        {
+            /*
+             * Do the signing.
+             */
+            rc = RTHttpSignHeaders(a_hHttp, a_enmHttpMethod, a_rStrFullUrl.c_str(), a_hKey, a_rStrKeyId.c_str(), 0 /*fFlags*/);
+        }
+    }
+    return rc;
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestClientRequestBase.cpp b/src/VBox/Runtime/common/rest/RTCRestClientRequestBase.cpp
new file mode 100644
index 00000000..c8211c79
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestClientRequestBase.cpp
@@ -0,0 +1,280 @@
+/* $Id: RTCRestClientRequestBase.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestClientRequestBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restclient.h>
+
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/log.h>
+#include <iprt/cpp/restarray.h>
+#include <iprt/cpp/reststringmap.h>
+
+
+/**
+ * Default constructor.
+ */
+RTCRestClientRequestBase::RTCRestClientRequestBase() RT_NOEXCEPT
+    : m_fIsSet(0)
+    , m_fErrorSet(0)
+{
+}
+
+
+/**
+ * Copy constructor.
+ */
+RTCRestClientRequestBase::RTCRestClientRequestBase(RTCRestClientRequestBase const &a_rThat) RT_NOEXCEPT
+    : m_fIsSet(a_rThat.m_fIsSet)
+    , m_fErrorSet(a_rThat.m_fErrorSet)
+{
+}
+
+
+/**
+ * Destructor
+ */
+RTCRestClientRequestBase::~RTCRestClientRequestBase()
+{
+    /* nothing to do */
+}
+
+
+/**
+ * Copy assignment operator.
+ */
+RTCRestClientRequestBase &RTCRestClientRequestBase::operator=(RTCRestClientRequestBase const &a_rThat) RT_NOEXCEPT
+{
+    m_fIsSet    = a_rThat.m_fIsSet;
+    m_fErrorSet = a_rThat.m_fErrorSet;
+    return *this;
+}
+
+
+int RTCRestClientRequestBase::doPathParameters(RTCString *a_pStrPath, const char *a_pszPathTemplate, size_t a_cchPathTemplate,
+                                               PATHPARAMDESC const *a_paPathParams, PATHPARAMSTATE *a_paPathParamStates,
+                                               size_t a_cPathParams) const RT_NOEXCEPT
+{
+    int rc = a_pStrPath->assignNoThrow(a_pszPathTemplate, a_cchPathTemplate);
+    AssertRCReturn(rc, rc);
+
+    /* Locate the sub-string to replace with values first: */
+    for (size_t i = 0; i < a_cPathParams; i++)
+    {
+        char const *psz = strstr(a_pszPathTemplate, a_paPathParams[i].pszName);
+        AssertReturn(psz, VERR_INTERNAL_ERROR_5);
+        a_paPathParamStates[i].offName = psz - a_pszPathTemplate;
+    }
+
+    /* Replace with actual values: */
+    for (size_t i = 0; i < a_cPathParams; i++)
+    {
+        AssertReturn(   (a_paPathParams[i].fFlags & RTCRestObjectBase::kCollectionFormat_Mask)
+                     != RTCRestObjectBase::kCollectionFormat_multi,
+                     VERR_INTERNAL_ERROR_3);
+        AssertMsgReturn(a_paPathParamStates[i].pObj != NULL,
+                        ("%s: Path parameter '%s' is not set!\n",
+                         getOperationName(), a_paPathParams[i].pszName),
+                        VERR_REST_PATH_PARAMETER_NOT_SET);
+        AssertMsgReturn(m_fIsSet & RT_BIT_64(a_paPathParams[i].iBitNo),
+                        ("%s: Path parameter '%s' is not set!\n",
+                         getOperationName(), a_paPathParams[i].pszName),
+                        VERR_REST_PATH_PARAMETER_NOT_SET);
+
+        RTCString strPathParam;
+        rc = a_paPathParamStates[i].pObj->toString(&strPathParam, a_paPathParams[i].fFlags);
+        AssertRCReturn(rc, rc);
+
+        LogRel5(("> %s: /%s = %s\n",
+                 getOperationName(), a_paPathParams[i].pszName, strPathParam.c_str()));
+
+        RTCString strTmpVal;
+        rc = strTmpVal.printfNoThrow("%RMpa", strPathParam.c_str()); /* urlencode */
+        AssertRCReturn(rc, rc);
+
+        /* Replace. */
+        ssize_t cchAdjust = strTmpVal.length() - a_paPathParams[i].cchName;
+        rc = a_pStrPath->replaceNoThrow(a_paPathParamStates[i].offName, a_paPathParams[i].cchName, strTmpVal);
+        AssertRCReturn(rc, rc);
+
+        /* Adjust subsequent fields. */
+        if (cchAdjust != 0)
+            for (size_t j = i + 1; j < a_cPathParams; j++)
+                if (a_paPathParamStates[j].offName > a_paPathParamStates[i].offName)
+                    a_paPathParamStates[j].offName += cchAdjust;
+    }
+
+    return VINF_SUCCESS;
+}
+
+
+int RTCRestClientRequestBase::doQueryParameters(RTCString *a_pStrQuery, QUERYPARAMDESC const *a_paQueryParams,
+                                                RTCRestObjectBase const **a_papQueryParamObjs, size_t a_cQueryParams) const RT_NOEXCEPT
+{
+    RTCString strTmpVal;
+    char chSep = a_pStrQuery->isEmpty() ? '?' : '&';
+    for (size_t i = 0; i < a_cQueryParams; i++)
+    {
+        if (   a_paQueryParams[i].fRequired
+            || (m_fIsSet & RT_BIT_64(a_paQueryParams[i].iBitNo)) )
+        {
+            AssertMsgReturn(a_papQueryParamObjs[i] != NULL,
+                            ("%s: Required query parameter '%s' is not set!\n",
+                             getOperationName(), a_paQueryParams[i].pszName),
+                            VERR_REST_REQUIRED_QUERY_PARAMETER_NOT_SET);
+            AssertMsgReturn(m_fIsSet & RT_BIT_64(a_paQueryParams[i].iBitNo),
+                            ("%s: Required query parameter '%s' is not set!\n",
+                             getOperationName(), a_paQueryParams[i].pszName),
+                            VERR_REST_REQUIRED_QUERY_PARAMETER_NOT_SET);
+
+            if (   (a_paQueryParams[i].fFlags & RTCRestObjectBase::kCollectionFormat_Mask)
+                != RTCRestObjectBase::kCollectionFormat_multi)
+            {
+                int rc = a_papQueryParamObjs[i]->toString(&strTmpVal, a_paQueryParams[i].fFlags);
+                AssertRCReturn(rc, rc);
+
+                rc = a_pStrQuery->appendPrintfNoThrow("%c%RMpa=%RMpa", chSep, a_paQueryParams[i].pszName, strTmpVal.c_str());
+                AssertRCReturn(rc, rc);
+
+                LogRel5(("> %s: ?%s = %s\n",
+                         getOperationName(), a_paQueryParams[i].pszName, strTmpVal.c_str()));
+
+                chSep = '&';
+            }
+            else
+            {
+                /*
+                 * Enumerate array and add 'name=element' for each element in it.
+                 */
+                AssertReturn(a_papQueryParamObjs[i]->typeClass() == RTCRestObjectBase::kTypeClass_Array,
+                             VERR_REST_INTERNAL_ERROR_2);
+                RTCRestArrayBase const *pArray = (RTCRestArrayBase const *)a_papQueryParamObjs[i];
+                for (size_t j = 0; j < pArray->size(); j++)
+                {
+                    RTCRestObjectBase const *pObj = pArray->atBase(j);
+                    int rc = pObj->toString(&strTmpVal, a_paQueryParams[i].fFlags & ~RTCRestObjectBase::kCollectionFormat_Mask);
+                    AssertRCReturn(rc, rc);
+
+                    rc = a_pStrQuery->appendPrintfNoThrow("%c%RMpa=%RMpa", chSep, a_paQueryParams[i].pszName, strTmpVal.c_str());
+                    AssertRCReturn(rc, rc);
+
+                    LogRel5(("> %s: ?%s[%d] = %s\n",
+                             getOperationName(), a_paQueryParams[i].pszName, j, strTmpVal.c_str()));
+
+                    chSep = '&';
+                }
+            }
+        }
+    }
+    return VINF_SUCCESS;
+}
+
+
+int RTCRestClientRequestBase::doHeaderParameters(RTHTTP a_hHttp, HEADERPARAMDESC const *a_paHeaderParams,
+                                                 RTCRestObjectBase const **a_papHeaderParamObjs, size_t a_cHeaderParams) const RT_NOEXCEPT
+{
+    RTCString strTmpVal;
+    for (size_t i = 0; i < a_cHeaderParams; i++)
+    {
+        AssertReturn(   (a_paHeaderParams[i].fFlags & RTCRestObjectBase::kCollectionFormat_Mask)
+                     != RTCRestObjectBase::kCollectionFormat_multi,
+                     VERR_INTERNAL_ERROR_3);
+
+        if (   a_paHeaderParams[i].fRequired
+            || (m_fIsSet & RT_BIT_64(a_paHeaderParams[i].iBitNo)) )
+        {
+            AssertMsgReturn(m_fIsSet & RT_BIT_64(a_paHeaderParams[i].iBitNo),
+                            ("%s: Required header parameter '%s' is not set!\n",
+                             getOperationName(), a_paHeaderParams[i].pszName),
+                            VERR_REST_REQUIRED_HEADER_PARAMETER_NOT_SET);
+            AssertMsgReturn(a_papHeaderParamObjs[i] != NULL,
+                            ("%s: Required header parameter '%s' is not set!\n",
+                             getOperationName(), a_paHeaderParams[i].pszName),
+                            VERR_REST_REQUIRED_HEADER_PARAMETER_NOT_SET);
+
+            if (!a_paHeaderParams[i].fMapCollection)
+            {
+                int rc = a_papHeaderParamObjs[i]->toString(&strTmpVal, a_paHeaderParams[i].fFlags);
+                AssertRCReturn(rc, rc);
+
+                rc = RTHttpAddHeader(a_hHttp, a_paHeaderParams[i].pszName, strTmpVal.c_str(), strTmpVal.length(),
+                                     RTHTTPADDHDR_F_BACK);
+                AssertRCReturn(rc, rc);
+
+                LogRel5(("> %s: :%s = %s\n",
+                         getOperationName(), a_paHeaderParams[i].pszName, strTmpVal.c_str()));
+            }
+            else if (!a_papHeaderParamObjs[i]->isNull())
+            {
+                /*
+                 * Enumerate the map and produce a series of head fields on the form:
+                 *      (a_paHeaderParams[i].pszName + key): value.toString()
+                 */
+                AssertReturn(a_papHeaderParamObjs[i]->typeClass() == RTCRestObjectBase::kTypeClass_StringMap,
+                             VERR_REST_INTERNAL_ERROR_1);
+                RTCRestStringMapBase const *pMap    = (RTCRestStringMapBase const *)a_papHeaderParamObjs[i];
+                const size_t                cchName = strlen(a_paHeaderParams[i].pszName);
+                Assert(a_paHeaderParams[i].pszName[cchName - 1] != '*');
+                RTCString                   strTmpName;
+                for (RTCRestStringMapBase::ConstIterator it = pMap->begin(); it != pMap->end(); ++it)
+                {
+                    int rc = strTmpName.assignNoThrow(a_paHeaderParams[i].pszName, cchName);
+                    AssertRCReturn(rc, rc);
+                    rc = strTmpName.appendNoThrow(it.getKey());
+                    AssertRCReturn(rc, rc);
+
+                    rc = it.getValue()->toString(&strTmpVal, a_paHeaderParams[i].fFlags);
+                    AssertRCReturn(rc, rc);
+
+                    rc = RTHttpAddHeader(a_hHttp, strTmpName.c_str(), strTmpVal.c_str(), strTmpVal.length(),
+                                         RTHTTPADDHDR_F_BACK);
+                    AssertRCReturn(rc, rc);
+
+                    LogRel5(("> %s: :%s = %s\n",
+                             getOperationName(), strTmpName.c_str(), strTmpVal.c_str()));
+                }
+            }
+            else
+                Assert(!a_paHeaderParams[i].fRequired);
+        }
+    }
+    return VINF_SUCCESS;
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestClientResponseBase.cpp b/src/VBox/Runtime/common/rest/RTCRestClientResponseBase.cpp
new file mode 100644
index 00000000..90bc84b5
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestClientResponseBase.cpp
@@ -0,0 +1,413 @@
+/* $Id: RTCRestClientResponseBase.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestClientResponseBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restclient.h>
+
+#include <iprt/ctype.h>
+#include <iprt/err.h>
+#include <iprt/log.h>
+#include <iprt/cpp/reststringmap.h>
+
+
+/**
+ * Default constructor.
+ */
+RTCRestClientResponseBase::RTCRestClientResponseBase() RT_NOEXCEPT
+    : m_rcStatus(VERR_WRONG_ORDER)
+    , m_rcHttp(VERR_NOT_AVAILABLE)
+    , m_pErrInfo(NULL)
+{
+}
+
+
+/**
+ * Destructor.
+ */
+RTCRestClientResponseBase::~RTCRestClientResponseBase()
+{
+    deleteErrInfo();
+}
+
+
+/**
+ * Copy constructor.
+ */
+RTCRestClientResponseBase::RTCRestClientResponseBase(RTCRestClientResponseBase const &a_rThat)
+    : m_rcStatus(a_rThat.m_rcStatus)
+    , m_rcHttp(a_rThat.m_rcHttp)
+    , m_pErrInfo(NULL)
+    , m_strContentType(a_rThat.m_strContentType)
+{
+    if (a_rThat.m_pErrInfo)
+        copyErrInfo(a_rThat.m_pErrInfo);
+}
+
+
+/**
+ * Copy assignment operator.
+ */
+RTCRestClientResponseBase &RTCRestClientResponseBase::operator=(RTCRestClientResponseBase const &a_rThat)
+{
+    m_rcStatus       = a_rThat.m_rcStatus;
+    m_rcHttp         = a_rThat.m_rcHttp;
+    m_strContentType = a_rThat.m_strContentType;
+    if (a_rThat.m_pErrInfo)
+        copyErrInfo(a_rThat.m_pErrInfo);
+    else if (m_pErrInfo)
+        deleteErrInfo();
+
+    return *this;
+}
+
+
+void RTCRestClientResponseBase::reset() RT_NOEXCEPT
+{
+    /* Return to default constructor state. */
+    m_rcStatus = VERR_WRONG_ORDER;
+    m_rcHttp   = VERR_NOT_AVAILABLE;
+    if (m_pErrInfo)
+        deleteErrInfo();
+    m_strContentType.setNull();
+}
+
+
+int RTCRestClientResponseBase::receivePrepare(RTHTTP a_hHttp) RT_NOEXCEPT
+{
+    int rc = RTHttpSetHeaderCallback(a_hHttp, receiveHttpHeaderCallback, this);
+    AssertRCReturn(rc, rc);
+
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestClientResponseBase::receiveComplete(int a_rcStatus, RTHTTP a_hHttp) RT_NOEXCEPT
+{
+    RT_NOREF_PV(a_hHttp);
+    m_rcStatus = a_rcStatus;
+    if (a_rcStatus >= 0)
+        m_rcHttp = a_rcStatus;
+
+    int rc = RTHttpSetHeaderCallback(a_hHttp, NULL, NULL);
+    AssertRC(rc);
+}
+
+
+int RTCRestClientResponseBase::consumeHeader(uint32_t a_uMatchWord, const char *a_pchField, size_t a_cchField,
+                                             const char *a_pchValue, size_t a_cchValue) RT_NOEXCEPT
+{
+    if (   a_uMatchWord == RTHTTP_MAKE_HDR_MATCH_WORD(sizeof("Content-Type") - 1, 'c', 'o', 'n')
+        && RTStrNICmpAscii(a_pchField, RT_STR_TUPLE("Content-Type")) == 0)
+    {
+        int rc = RTStrValidateEncodingEx(a_pchValue, a_cchValue, RTSTR_VALIDATE_ENCODING_EXACT_LENGTH);
+        AssertRC(rc);
+        if (RT_SUCCESS(rc))
+            return m_strContentType.assignNoThrow(a_pchValue, a_cchValue);
+    }
+    RT_NOREF(a_cchField);
+    return VINF_SUCCESS;
+}
+
+
+/*static*/ DECLCALLBACK(int)
+RTCRestClientResponseBase::receiveHttpHeaderCallback(RTHTTP hHttp, uint32_t uMatchWord, const char *pchField, size_t cchField,
+                                                     const char *pchValue, size_t cchValue, void *pvUser) RT_NOEXCEPT
+{
+    RTCRestClientResponseBase *pThis = (RTCRestClientResponseBase *)pvUser;
+    RT_NOREF(hHttp);
+    return pThis->consumeHeader(uMatchWord, pchField, cchField, pchValue, cchValue);
+}
+
+
+void RTCRestClientResponseBase::consumeBody(const char *a_pchData, size_t a_cbData) RT_NOEXCEPT
+{
+    RT_NOREF(a_pchData, a_cbData);
+}
+
+
+void RTCRestClientResponseBase::receiveFinal() RT_NOEXCEPT
+{
+}
+
+
+PRTERRINFO RTCRestClientResponseBase::getErrInfoInternal(void) RT_NOEXCEPT
+{
+    if (m_pErrInfo)
+        return m_pErrInfo;
+    size_t cbMsg = _4K;
+    m_pErrInfo = (PRTERRINFO)RTMemAllocZ(sizeof(*m_pErrInfo) + cbMsg);
+    if (m_pErrInfo)
+        return RTErrInfoInit(m_pErrInfo, (char *)(m_pErrInfo + 1), cbMsg);
+    return NULL;
+}
+
+
+void RTCRestClientResponseBase::deleteErrInfo(void) RT_NOEXCEPT
+{
+    if (m_pErrInfo)
+    {
+        RTMemFree(m_pErrInfo);
+        m_pErrInfo = NULL;
+    }
+}
+
+
+void RTCRestClientResponseBase::copyErrInfo(PCRTERRINFO pErrInfo) RT_NOEXCEPT
+{
+    deleteErrInfo();
+    m_pErrInfo = (PRTERRINFO)RTMemDup(pErrInfo, pErrInfo->cbMsg + sizeof(*pErrInfo));
+    if (m_pErrInfo)
+    {
+        m_pErrInfo->pszMsg = (char *)(m_pErrInfo + 1);
+        m_pErrInfo->apvReserved[0] = NULL;
+        m_pErrInfo->apvReserved[1] = NULL;
+    }
+}
+
+
+int RTCRestClientResponseBase::addError(int rc, const char *pszFormat, ...) RT_NOEXCEPT
+{
+    PRTERRINFO pErrInfo = getErrInfoInternal();
+    if (pErrInfo)
+    {
+        va_list va;
+        va_start(va, pszFormat);
+        if (   !RTErrInfoIsSet(pErrInfo)
+            || pErrInfo->cbMsg == 0
+            || pErrInfo->pszMsg[pErrInfo->cbMsg - 1] == '\n')
+            RTErrInfoAddV(pErrInfo, rc, pszFormat, va);
+        else
+            RTErrInfoAddF(pErrInfo, rc, "\n%N", pszFormat, &va);
+        va_end(va);
+    }
+    if (RT_SUCCESS(m_rcStatus) && RT_FAILURE_NP(rc))
+        m_rcStatus = rc;
+    return rc;
+}
+
+
+RTCRestClientResponseBase::PrimaryJsonCursorForBody::PrimaryJsonCursorForBody(RTJSONVAL hValue, const char *pszName,
+                                                                              RTCRestClientResponseBase *a_pThat) RT_NOEXCEPT
+    : RTCRestJsonPrimaryCursor(hValue, pszName, a_pThat->getErrInfoInternal())
+    , m_pThat(a_pThat)
+{
+}
+
+
+int RTCRestClientResponseBase::PrimaryJsonCursorForBody::addError(RTCRestJsonCursor const &a_rCursor, int a_rc,
+                                                                  const char *a_pszFormat, ...) RT_NOEXCEPT
+{
+    va_list va;
+    va_start(va, a_pszFormat);
+    char szPath[256];
+    m_pThat->addError(a_rc, "response body/%s: %N", getPath(a_rCursor, szPath, sizeof(szPath)), a_pszFormat, &va);
+    va_end(va);
+    return a_rc;
+}
+
+
+int RTCRestClientResponseBase::PrimaryJsonCursorForBody::unknownField(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    char szPath[256];
+    m_pThat->addError(VWRN_NOT_FOUND, "response body/%s: unknown field (type %s)",
+                      getPath(a_rCursor, szPath, sizeof(szPath)), RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+    return VWRN_NOT_FOUND;
+}
+
+
+int RTCRestClientResponseBase::deserializeHeader(RTCRestObjectBase *a_pObj, const char *a_pchValue, size_t a_cchValue,
+                                                 uint32_t a_fFlags, const char *a_pszErrorTag) RT_NOEXCEPT
+{
+    /*
+     * Start by checking the encoding and transfering the value to a RTCString object.
+     */
+    int rc = RTStrValidateEncodingEx(a_pchValue, a_cchValue, RTSTR_VALIDATE_ENCODING_EXACT_LENGTH);
+    if (RT_SUCCESS(rc))
+    {
+        RTCString strValue;
+        rc = strValue.assignNoThrow(a_pchValue, a_cchValue);
+        if (RT_SUCCESS(rc))
+        {
+            LogRel7(("< %s: :%s = %s\n",
+                     getOperationName(), a_pszErrorTag, strValue.c_str()));
+
+            /*
+             * Try deserialize it.
+             */
+            RTERRINFOSTATIC ErrInfo;
+            rc = a_pObj->fromString(strValue, a_pszErrorTag, RTErrInfoInitStatic(&ErrInfo), a_fFlags);
+            if (RT_SUCCESS(rc))
+            { /* likely */ }
+            else if (RTErrInfoIsSet(&ErrInfo.Core))
+                addError(rc, "Error %Rrc parsing header field '%s': %s", rc, a_pszErrorTag, ErrInfo.Core.pszMsg);
+            else
+                addError(rc, "Error %Rrc parsing header field '%s'", rc, a_pszErrorTag);
+        }
+    }
+    else
+    {
+        addError(rc, "Error %Rrc validating value encoding of header field '%s': %.*Rhxs",
+                 rc, a_pszErrorTag, a_cchValue, a_pchValue);
+        rc = VINF_SUCCESS; /* ignore */
+    }
+    return rc;
+}
+
+
+int RTCRestClientResponseBase::deserializeHeaderIntoMap(RTCRestStringMapBase *a_pMap, const char *a_pchField, size_t a_cchField,
+                                                        const char *a_pchValue, size_t a_cchValue, uint32_t a_fFlags,
+                                                        const char *a_pszErrorTag) RT_NOEXCEPT
+{
+    /*
+     * Start by checking the encoding of both the field and value,
+     * then transfering the value to a RTCString object.
+     */
+    int rc = RTStrValidateEncodingEx(a_pchField, a_cchField, RTSTR_VALIDATE_ENCODING_EXACT_LENGTH);
+    if (RT_SUCCESS(rc))
+    {
+        rc = RTStrValidateEncodingEx(a_pchValue, a_cchValue, RTSTR_VALIDATE_ENCODING_EXACT_LENGTH);
+        if (RT_SUCCESS(rc))
+        {
+            RTCString strValue;
+            rc = strValue.assignNoThrow(a_pchValue, a_cchValue);
+            if (RT_SUCCESS(rc))
+            {
+                /*
+                 * Create a value object and put it into the map.
+                 */
+                RTCRestObjectBase *pValue;
+                rc = a_pMap->putNewValue(&pValue, a_pchField, a_cchField);
+                if (RT_SUCCESS(rc))
+                {
+                    LogRel7(("< %s: :%s%.*s = %s\n",
+                             getOperationName(), a_pszErrorTag, a_cchField, a_pchField,  strValue.c_str()));
+
+                    /*
+                     * Try deserialize the value.
+                     */
+                    RTERRINFOSTATIC ErrInfo;
+                    rc = pValue->fromString(strValue, a_pszErrorTag, RTErrInfoInitStatic(&ErrInfo), a_fFlags);
+                    if (RT_SUCCESS(rc))
+                    { /* likely */ }
+                    else if (RTErrInfoIsSet(&ErrInfo.Core))
+                        addError(rc, "Error %Rrc parsing header field '%s' subfield '%.*s': %s",
+                                 rc, a_pszErrorTag, a_cchField, a_pchField, ErrInfo.Core.pszMsg);
+                    else
+                        addError(rc, "Error %Rrc parsing header field '%s' subfield '%.*s'",
+                                 rc, a_pszErrorTag, a_cchField, a_pchField);
+                }
+            }
+        }
+        else
+        {
+            addError(rc, "Error %Rrc validating value encoding of header field '%s': %.*Rhxs",
+                     rc, a_pszErrorTag, a_cchValue, a_pchValue);
+            rc = VINF_SUCCESS; /* ignore */
+        }
+    }
+    else
+    {
+        addError(rc, "Error %Rrc validating sub-field encoding of header field '%s*': %.*Rhxs",
+                 rc, a_pszErrorTag, a_cchField, a_pchField);
+        rc = VINF_SUCCESS; /* ignore */
+    }
+    return rc;
+}
+
+
+void RTCRestClientResponseBase::deserializeBody(const char *a_pchData, size_t a_cbData, const char *a_pszBodyName) RT_NOEXCEPT
+{
+    if (m_strContentType.startsWith("application/json"))
+    {
+        int rc = RTStrValidateEncodingEx(a_pchData, a_cbData, RTSTR_VALIDATE_ENCODING_EXACT_LENGTH);
+        if (RT_SUCCESS(rc))
+        {
+            if (LogRelIs7Enabled())
+            {
+                /* skip m_ or m_p prefix */
+                const char *pszName = a_pszBodyName;
+                if (pszName[0] == 'm' && pszName[1] == '_')
+                {
+                    if (pszName[2] == 'p')
+                        pszName += 3;
+                    else
+                        pszName += 2;
+                }
+
+                LogRel7(("< %s: %d: %s = %.*s\n",
+                         getOperationName(), m_rcHttp, pszName, a_cbData, a_pchData));
+            }
+
+            RTERRINFOSTATIC ErrInfo;
+            RTJSONVAL hValue;
+            rc = RTJsonParseFromBuf(&hValue, (const uint8_t *)a_pchData, a_cbData, RTErrInfoInitStatic(&ErrInfo));
+            if (RT_SUCCESS(rc))
+            {
+                PrimaryJsonCursorForBody PrimaryCursor(hValue, a_pszBodyName, this); /* note: consumes hValue */
+                deserializeBodyFromJsonCursor(PrimaryCursor.m_Cursor);
+            }
+            else if (RTErrInfoIsSet(&ErrInfo.Core))
+                addError(rc, "Error %Rrc parsing server response as JSON (type %s): %s",
+                         rc, a_pszBodyName, ErrInfo.Core.pszMsg);
+            else
+                addError(rc, "Error %Rrc parsing server response as JSON (type %s)", rc, a_pszBodyName);
+        }
+        else if (rc == VERR_INVALID_UTF8_ENCODING)
+            addError(VERR_REST_RESPONSE_INVALID_UTF8_ENCODING, "Invalid UTF-8 body encoding (object type %s; Content-Type: %s)",
+                     a_pszBodyName, m_strContentType.c_str());
+        else if (rc == VERR_BUFFER_UNDERFLOW)
+            addError(VERR_REST_RESPONSE_EMBEDDED_ZERO_CHAR, "Embedded zero character in response (object type %s; Content-Type: %s)",
+                     a_pszBodyName, m_strContentType.c_str());
+        else
+            addError(rc, "Unexpected body validation error (object type %s; Content-Type: %s): %Rrc",
+                     a_pszBodyName, m_strContentType.c_str(), rc);
+    }
+    else
+        addError(VERR_REST_RESPONSE_CONTENT_TYPE_NOT_SUPPORTED, "Unsupported content type for '%s': %s",
+                 a_pszBodyName, m_strContentType.c_str());
+}
+
+
+void RTCRestClientResponseBase::deserializeBodyFromJsonCursor(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_INTERNAL_ERROR_8, "deserializeBodyFromJsonCursor must be overridden!");
+    AssertFailed();
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestJsonPrimaryCursor.cpp b/src/VBox/Runtime/common/rest/RTCRestJsonPrimaryCursor.cpp
new file mode 100644
index 00000000..7de9f356
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestJsonPrimaryCursor.cpp
@@ -0,0 +1,120 @@
+/* $Id: RTCRestJsonPrimaryCursor.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestJsonPrimaryCursor implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restbase.h>
+
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+
+char *RTCRestJsonPrimaryCursor::getPath(RTCRestJsonCursor const &a_rCursor, char *pszDst, size_t cbDst) const RT_NOEXCEPT
+{
+    AssertReturn(cbDst > 0, NULL);
+
+    /*
+     * To avoid using recursion, we need to first do a pass to figure sizes
+     * and depth.  To keep things simple, with the exception of the top name
+     * we only copy out full names.
+     */
+    /* Special case: Insufficient space for the top name. */
+    size_t const cchTopName = strlen(a_rCursor.m_pszName);
+    if (cchTopName >= cbDst)
+    {
+        memcpy(pszDst, a_rCursor.m_pszName, cbDst - 1);
+        pszDst[cbDst - 1] = '\0';
+    }
+    else
+    {
+        /* Determin how deep we should go and the resulting length. */
+        size_t iMaxDepth = 0;
+        size_t cchTotal  = cchTopName;
+        for (RTCRestJsonCursor const *pCur = a_rCursor.m_pParent; pCur; pCur = pCur->m_pParent)
+        {
+            size_t const cchName = strlen(pCur->m_pszName);
+            size_t cchNewTotal = cchName + 1 + cchTotal;
+            if (cchNewTotal < cbDst)
+                cchTotal = cchNewTotal;
+            else
+                break;
+            iMaxDepth++;
+        }
+
+        /* Produce the string, in reverse. */
+        char *psz = &pszDst[cchTotal];
+        *psz = '\0';
+        psz -= cchTopName;
+        memcpy(psz, a_rCursor.m_pszName, cchTopName);
+        for (RTCRestJsonCursor const *pCur = a_rCursor.m_pParent; pCur && iMaxDepth > 0; pCur = pCur->m_pParent)
+        {
+            psz -= 1;
+            *psz = '.';
+
+            size_t const cchName = strlen(pCur->m_pszName);
+            psz -= cchName;
+            memcpy(psz, pCur->m_pszName, cchName);
+
+            iMaxDepth--;
+        }
+        Assert(psz == pszDst);
+    }
+    return pszDst;
+}
+
+
+int RTCRestJsonPrimaryCursor::addError(RTCRestJsonCursor const &a_rCursor, int a_rc, const char *a_pszFormat, ...) RT_NOEXCEPT
+{
+    va_list va;
+    va_start(va, a_pszFormat);
+    char szPath[128];
+    a_rc = RTErrInfoAddF(m_pErrInfo, a_rc, "%s: %N\n", getPath(a_rCursor, szPath, sizeof(szPath)), a_pszFormat, &va);
+    va_end(va);
+    return a_rc;
+}
+
+
+int RTCRestJsonPrimaryCursor::unknownField(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    char szPath[128];
+    return RTErrInfoAddF(m_pErrInfo, VWRN_NOT_FOUND, "%s: unknown field (type %s)\n",
+                         getPath(a_rCursor, szPath, sizeof(szPath)),
+                         RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestOutputBase.cpp b/src/VBox/Runtime/common/rest/RTCRestOutputBase.cpp
new file mode 100644
index 00000000..56bbce04
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestOutputBase.cpp
@@ -0,0 +1,129 @@
+/* $Id: RTCRestOutputBase.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestOutputBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restoutput.h>
+
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+
+RTCRestOutputBase::RTCRestOutputBase() RT_NOEXCEPT
+    : m_uState(0)
+{
+}
+
+
+RTCRestOutputBase::~RTCRestOutputBase()
+{
+}
+
+
+size_t RTCRestOutputBase::vprintf(const char *pszFormat, va_list va) RT_NOEXCEPT
+{
+    return RTStrFormatV(printfOutputCallback, this, NULL, NULL, pszFormat, va);
+}
+
+
+/*static*/ DECLCALLBACK(size_t) RTCRestOutputBase::printfOutputCallback(void *pvArg, const char *pachChars, size_t cbChars) RT_NOEXCEPT
+{
+    return ((RTCRestOutputBase *)pvArg)->output(pachChars, cbChars);
+}
+
+
+uint32_t RTCRestOutputBase::beginArray() RT_NOEXCEPT
+{
+    output(RT_STR_TUPLE("["));
+    uint32_t const uOldState = m_uState;
+    m_uState = (uOldState & 0xffff) + 1;
+    return uOldState;
+}
+
+
+void RTCRestOutputBase::endArray(uint32_t a_uOldState) RT_NOEXCEPT
+{
+    m_uState = a_uOldState;
+    output(RT_STR_TUPLE("]"));
+}
+
+
+uint32_t RTCRestOutputBase::beginObject() RT_NOEXCEPT
+{
+    output(RT_STR_TUPLE("{"));
+    uint32_t const uOldState = m_uState;
+    m_uState = (uOldState & 0xffff) + 1;
+    return uOldState;
+}
+
+
+void RTCRestOutputBase::endObject(uint32_t a_uOldState) RT_NOEXCEPT
+{
+    m_uState = a_uOldState;
+    output(RT_STR_TUPLE("}"));
+}
+
+
+void RTCRestOutputBase::valueSeparator() RT_NOEXCEPT
+{
+    if (m_uState & RT_BIT_32(31))
+        output(RT_STR_TUPLE(","));
+    else
+        m_uState |= RT_BIT_32(31);
+}
+
+
+void RTCRestOutputBase::valueSeparatorAndName(const char *a_pszName, size_t a_cchName) RT_NOEXCEPT
+{
+    RT_NOREF(a_cchName);
+    if (m_uState & RT_BIT_32(31))
+        printf(",%RMjs:", a_pszName);
+    else
+    {
+        m_uState |= RT_BIT_32(31);
+        printf("%RMjs:", a_pszName);
+    }
+}
+
+
+void RTCRestOutputBase::nullValue() RT_NOEXCEPT
+{
+    output(RT_STR_TUPLE("null"));
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestOutputPrettyBase.cpp b/src/VBox/Runtime/common/rest/RTCRestOutputPrettyBase.cpp
new file mode 100644
index 00000000..c0aed42f
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestOutputPrettyBase.cpp
@@ -0,0 +1,134 @@
+/* $Id: RTCRestOutputPrettyBase.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestOutputPrettyBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restoutput.h>
+
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+
+RTCRestOutputPrettyBase::RTCRestOutputPrettyBase() RT_NOEXCEPT
+    : RTCRestOutputBase()
+{
+}
+
+
+RTCRestOutputPrettyBase::~RTCRestOutputPrettyBase()
+{
+}
+
+
+uint32_t RTCRestOutputPrettyBase::beginArray() RT_NOEXCEPT
+{
+    output(RT_STR_TUPLE("["));
+    uint32_t const uOldState = m_uState;
+    m_uState = (uOldState & 0xffff) + 1;
+    return uOldState;
+}
+
+
+void RTCRestOutputPrettyBase::endArray(uint32_t a_uOldState) RT_NOEXCEPT
+{
+    m_uState = a_uOldState;
+    output(RT_STR_TUPLE("\n"));
+    outputIndentation();
+    output(RT_STR_TUPLE("]"));
+}
+
+
+uint32_t RTCRestOutputPrettyBase::beginObject() RT_NOEXCEPT
+{
+    output(RT_STR_TUPLE("{"));
+    uint32_t const uOldState = m_uState;
+    m_uState = (uOldState & 0xffff) + 1;
+    return uOldState;
+}
+
+
+void RTCRestOutputPrettyBase::endObject(uint32_t a_uOldState) RT_NOEXCEPT
+{
+    m_uState = a_uOldState;
+    output(RT_STR_TUPLE("\n"));
+    outputIndentation();
+    output(RT_STR_TUPLE("}"));
+}
+
+
+void RTCRestOutputPrettyBase::valueSeparator() RT_NOEXCEPT
+{
+    if (m_uState & RT_BIT_32(31))
+        output(RT_STR_TUPLE(",\n"));
+    else
+    {
+        m_uState |= RT_BIT_32(31);
+        output(RT_STR_TUPLE("\n"));
+    }
+    outputIndentation();
+}
+
+
+void RTCRestOutputPrettyBase::valueSeparatorAndName(const char *a_pszName, size_t a_cchName) RT_NOEXCEPT
+{
+    RT_NOREF(a_cchName);
+    if (m_uState & RT_BIT_32(31))
+        output(RT_STR_TUPLE(",\n"));
+    else
+    {
+        m_uState |= RT_BIT_32(31);
+        output(RT_STR_TUPLE("\n"));
+    }
+    outputIndentation();
+    printf("%RMjs: ", a_pszName);
+}
+
+
+void RTCRestOutputPrettyBase::outputIndentation() RT_NOEXCEPT
+{
+    static char const s_szSpaces[] = "                                                                                         ";
+    size_t cchIndent = (m_uState & 0xffff) << 1;
+    while (cchIndent > 0)
+    {
+        size_t cbToWrite = RT_MIN(cchIndent, sizeof(s_szSpaces) - 1);
+        output(s_szSpaces, cbToWrite);
+        cchIndent -= cbToWrite;
+    }
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestOutputPrettyToString.cpp b/src/VBox/Runtime/common/rest/RTCRestOutputPrettyToString.cpp
new file mode 100644
index 00000000..8258e7fa
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestOutputPrettyToString.cpp
@@ -0,0 +1,130 @@
+/* $Id: RTCRestOutputPrettyToString.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestOutputPrettyToString implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restoutput.h>
+
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+
+RTCRestOutputPrettyToString::RTCRestOutputPrettyToString(RTCString *a_pDst, bool a_fAppend /*= false*/) RT_NOEXCEPT
+    : RTCRestOutputPrettyBase()
+    , m_pDst(a_pDst)
+    , m_fOutOfMemory(false)
+{
+    if (!a_fAppend)
+        m_pDst->setNull();
+}
+
+
+RTCRestOutputPrettyToString::~RTCRestOutputPrettyToString()
+{
+    /* We don't own the string, so we don't delete it! */
+    m_pDst = NULL;
+}
+
+
+size_t RTCRestOutputPrettyToString::output(const char *a_pchString, size_t a_cchToWrite) RT_NOEXCEPT
+{
+    if (a_cchToWrite)
+    {
+        RTCString *pDst = m_pDst;
+        if (pDst && !m_fOutOfMemory)
+        {
+            /*
+             * Make sure we've got sufficient space available before we append.
+             */
+            size_t cchCurrent = pDst->length();
+            size_t cbCapacity = pDst->capacity();
+            size_t cbNeeded   = cchCurrent + a_cchToWrite + 1;
+            if (cbNeeded <= cbCapacity)
+            { /* likely */ }
+            else
+            {
+                /* Grow it. */
+                if (cbNeeded < _16M)
+                {
+                    if (cbCapacity <= _1K)
+                        cbCapacity = _1K;
+                    else
+                        cbCapacity = RT_ALIGN_Z(cbCapacity, _1K);
+                    while (cbCapacity < cbNeeded)
+                        cbCapacity <<= 1;
+                }
+                else
+                {
+                    cbCapacity = RT_ALIGN_Z(cbCapacity, _2M);
+                    while (cbCapacity < cbNeeded)
+                        cbCapacity += _2M;
+                }
+                int rc = pDst->reserveNoThrow(cbCapacity);
+                if (RT_SUCCESS(rc))
+                {
+                    rc = pDst->reserveNoThrow(cbNeeded);
+                    if (RT_FAILURE(rc))
+                    {
+                        m_fOutOfMemory = true;
+                        return a_cchToWrite;
+                    }
+                }
+            }
+
+            /*
+             * Do the appending.
+             */
+            pDst->append(a_pchString, a_cchToWrite);
+        }
+    }
+    return a_cchToWrite;
+}
+
+
+RTCString *RTCRestOutputPrettyToString::finalize() RT_NOEXCEPT
+{
+    RTCString *pRet;
+    if (!m_fOutOfMemory)
+        pRet = m_pDst;
+    else
+        pRet = NULL;
+    m_pDst = NULL;
+    return pRet;
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestOutputToString.cpp b/src/VBox/Runtime/common/rest/RTCRestOutputToString.cpp
new file mode 100644
index 00000000..372ddf81
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestOutputToString.cpp
@@ -0,0 +1,130 @@
+/* $Id: RTCRestOutputToString.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestOutputToString implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restoutput.h>
+
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+
+RTCRestOutputToString::RTCRestOutputToString(RTCString *a_pDst, bool a_fAppend /*= false*/) RT_NOEXCEPT
+    : RTCRestOutputBase()
+    , m_pDst(a_pDst)
+    , m_fOutOfMemory(false)
+{
+    if (!a_fAppend)
+        m_pDst->setNull();
+}
+
+
+RTCRestOutputToString::~RTCRestOutputToString()
+{
+    /* We don't own the string, so we don't delete it! */
+    m_pDst = NULL;
+}
+
+
+size_t RTCRestOutputToString::output(const char *a_pchString, size_t a_cchToWrite) RT_NOEXCEPT
+{
+    if (a_cchToWrite)
+    {
+        RTCString *pDst = m_pDst;
+        if (pDst && !m_fOutOfMemory)
+        {
+            /*
+             * Make sure we've got sufficient space available before we append.
+             */
+            size_t cchCurrent = pDst->length();
+            size_t cbCapacity = pDst->capacity();
+            size_t cbNeeded   = cchCurrent + a_cchToWrite + 1;
+            if (cbNeeded <= cbCapacity)
+            { /* likely */ }
+            else
+            {
+                /* Grow it. */
+                if (cbNeeded < _16M)
+                {
+                    if (cbCapacity <= _1K)
+                        cbCapacity = _1K;
+                    else
+                        cbCapacity = RT_ALIGN_Z(cbCapacity, _1K);
+                    while (cbCapacity < cbNeeded)
+                        cbCapacity <<= 1;
+                }
+                else
+                {
+                    cbCapacity = RT_ALIGN_Z(cbCapacity, _2M);
+                    while (cbCapacity < cbNeeded)
+                        cbCapacity += _2M;
+                }
+                int rc = pDst->reserveNoThrow(cbCapacity);
+                if (RT_SUCCESS(rc))
+                {
+                    rc = pDst->reserveNoThrow(cbNeeded);
+                    if (RT_FAILURE(rc))
+                    {
+                        m_fOutOfMemory = true;
+                        return a_cchToWrite;
+                    }
+                }
+            }
+
+            /*
+             * Do the appending.
+             */
+            pDst->append(a_pchString, a_cchToWrite);
+        }
+    }
+    return a_cchToWrite;
+}
+
+
+RTCString *RTCRestOutputToString::finalize() RT_NOEXCEPT
+{
+    RTCString *pRet;
+    if (!m_fOutOfMemory)
+        pRet = m_pDst;
+    else
+        pRet = NULL;
+    m_pDst = NULL;
+    return pRet;
+}
+
diff --git a/src/VBox/Runtime/common/rest/RTCRestStringMapBase.cpp b/src/VBox/Runtime/common/rest/RTCRestStringMapBase.cpp
new file mode 100644
index 00000000..35ec9805
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/RTCRestStringMapBase.cpp
@@ -0,0 +1,467 @@
+/* $Id: RTCRestStringMapBase.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestStringMapBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/reststringmap.h>
+
+#include <iprt/err.h>
+#include <iprt/string.h>
+#include <iprt/cpp/restoutput.h>
+
+
+/**
+ * Default destructor.
+ */
+RTCRestStringMapBase::RTCRestStringMapBase() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_Map(NULL)
+    , m_cEntries(0)
+{
+    RTListInit(&m_ListHead);
+}
+
+
+#if 0 /* trigger link error for now. */
+/** Copy constructor. */
+RTCRestStringMapBase::RTCRestStringMapBase(RTCRestStringMapBase const &a_rThat);
+#endif
+
+
+/**
+ * Destructor.
+ */
+RTCRestStringMapBase::~RTCRestStringMapBase()
+{
+    clear();
+}
+
+
+
+#if 0 /* trigger link error for now. */
+/** Copy assignment operator. */
+RTCRestStringMapBase &RTCRestStringMapBase::operator=(RTCRestStringMapBase const &a_rThat);
+#endif
+
+
+/*********************************************************************************************************************************
+*   Overridden base object methods                                                                                               *
+*********************************************************************************************************************************/
+
+RTCRestObjectBase *RTCRestStringMapBase::baseClone() const RT_NOEXCEPT
+{
+    RTCRestStringMapBase *pClone = createClone();
+    if (pClone)
+    {
+        int rc = pClone->copyMapWorkerNoThrow(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestStringMapBase::resetToDefault() RT_NOEXCEPT
+{
+    /* Default is an empty map. */
+    clear();
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestStringMapBase::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+    {
+        uint32_t const uOldState = a_rDst.beginObject();
+        MapEntry const *pCur;
+        RTListForEachCpp(&m_ListHead, pCur, MapEntry, ListEntry)
+        {
+            a_rDst.valueSeparatorAndName(pCur->strKey.c_str(), pCur->strKey.length());
+            pCur->pValue->serializeAsJson(a_rDst);
+        }
+        a_rDst.endObject(uOldState);
+    }
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestStringMapBase::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    if (RTJsonValueGetType(a_rCursor.m_hValue) == RTJSONVALTYPE_NULL)
+    {
+        setNull();
+        return VINF_SUCCESS;
+    }
+
+    /*
+     * Make sure the object starts out with an empty map.
+     */
+    if (m_cEntries > 0)
+        clear();
+    m_fNullIndicator = false;
+
+    /*
+     * Iterate the object values.
+     */
+    RTJSONIT hIterator;
+    int rcRet = RTJsonIteratorBeginObject(a_rCursor.m_hValue, &hIterator);
+    if (RT_SUCCESS(rcRet))
+    {
+        for (;;)
+        {
+            /* Set up the sub-cursor. */
+            RTCRestJsonCursor SubCursor(a_rCursor);
+            int rc = RTJsonIteratorQueryValue(hIterator, &SubCursor.m_hValue, &SubCursor.m_pszName);
+            if (RT_SUCCESS(rc))
+            {
+                /* Call the static deserializeInstanceFromJson method of the value class.  */
+                RTCRestObjectBase *pObj = NULL;
+                rc = deserializeValueInstanceFromJson(SubCursor, &pObj);
+                if (RT_SUCCESS(rc))
+                    Assert(pObj);
+                else if (RT_SUCCESS(rcRet))
+                    rcRet = rc;
+                if (pObj)
+                {
+                    /* Insert the value. */
+                    rc = putWorker(SubCursor.m_pszName, pObj, true /*a_fReplace*/);
+                    if (rc == VINF_SUCCESS)
+                    { /* likely */ }
+                    else if (RT_SUCCESS(rc))
+                    {
+                        a_rCursor.m_pPrimary->addError(a_rCursor, rc, "warning %Rrc inserting '%s' into map",
+                                                       rc, SubCursor.m_pszName);
+                        if (rcRet == VINF_SUCCESS)
+                            rcRet = rc;
+                    }
+                    else
+                    {
+                        rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "Failed to insert '%s' into map: %Rrc",
+                                                               SubCursor.m_pszName, rc);
+                        delete pObj;
+                    }
+                }
+            }
+            else
+                rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonIteratorQueryValue failed: %Rrc", rc);
+
+            /*
+             * Advance.
+             */
+            rc = RTJsonIteratorNext(hIterator);
+            if (RT_SUCCESS(rc))
+            { /* likely */ }
+            else if (rc == VERR_JSON_ITERATOR_END)
+                break;
+            else
+            {
+                rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonIteratorNext failed: %Rrc", rc);
+                break;
+            }
+        }
+
+        RTJsonIteratorFree(hIterator);
+    }
+    else if (rcRet == VERR_JSON_IS_EMPTY)
+        rcRet = VINF_SUCCESS;
+    else if (   rcRet == VERR_JSON_VALUE_INVALID_TYPE
+             && RTJsonValueGetType(a_rCursor.m_hValue) == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        rcRet = VINF_SUCCESS;
+    }
+    else
+        rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rcRet, "RTJsonIteratorBegin failed: %Rrc (type %s)",
+                                               rcRet, RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+    return rcRet;
+}
+
+// later?
+//    virtual int RTCRestStringMapBase::toString(RTCString *a_pDst, uint32_t a_fFlags = kCollectionFormat_Unspecified) const ;
+//    virtual int RTCRestStringMapBase::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo = NULL,
+//                           uint32_t a_fFlags = kCollectionFormat_Unspecified) ;
+//
+
+
+RTCRestObjectBase::kTypeClass RTCRestStringMapBase::typeClass(void) const RT_NOEXCEPT
+{
+    return kTypeClass_StringMap;
+}
+
+
+const char *RTCRestStringMapBase::typeName(void) const RT_NOEXCEPT
+{
+    return "RTCRestStringMap<ValueType>";
+}
+
+
+/*********************************************************************************************************************************
+*   Generic map methods                                                                                                          *
+*********************************************************************************************************************************/
+
+/**
+ * @callback_method_impl{FNRTSTRSPACECALLBACK}
+ */
+/*static*/ DECLCALLBACK(int) RTCRestStringMapBase::stringSpaceDestructorCallback(PRTSTRSPACECORE pStr, void *pvUser) RT_NOEXCEPT
+{
+    MapEntry *pNode = (MapEntry *)pStr;
+    if (pNode->pValue)
+    {
+        delete pNode->pValue;
+        pNode->pValue = NULL;
+    }
+    pNode->strKey.setNull();
+    delete pNode;
+
+    RT_NOREF(pvUser);
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestStringMapBase::clear() RT_NOEXCEPT
+{
+    RTStrSpaceDestroy(&m_Map, stringSpaceDestructorCallback, NULL);
+    RTListInit(&m_ListHead);
+    m_cEntries = 0;
+    m_fNullIndicator = false;
+}
+
+
+size_t RTCRestStringMapBase::size() const RT_NOEXCEPT
+{
+    return m_cEntries;
+}
+
+
+bool RTCRestStringMapBase::containsKey(const char *a_pszKey) const RT_NOEXCEPT
+{
+    if (isNull())
+        return false;
+
+    return RTStrSpaceGet((PRTSTRSPACE)&m_Map, a_pszKey) != NULL;
+}
+
+
+bool RTCRestStringMapBase::containsKey(RTCString const &a_rStrKey) const RT_NOEXCEPT
+{
+    return containsKey(a_rStrKey.c_str());
+}
+
+
+bool RTCRestStringMapBase::remove(const char *a_pszKey) RT_NOEXCEPT
+{
+    if (isNull())
+        return false;
+
+    MapEntry *pRemoved = (MapEntry *)RTStrSpaceRemove(&m_Map, a_pszKey);
+    if (pRemoved)
+    {
+        m_cEntries--;
+        RTListNodeRemove(&pRemoved->ListEntry);
+        stringSpaceDestructorCallback(&pRemoved->Core, NULL);
+        return true;
+    }
+    return false;
+}
+
+
+bool RTCRestStringMapBase::remove(RTCString const &a_rStrKey) RT_NOEXCEPT
+{
+    return remove(a_rStrKey.c_str());
+}
+
+
+int RTCRestStringMapBase::putNewValue(RTCRestObjectBase **a_ppValue, const char *a_pszKey, size_t a_cchKey /*= RTSTR_MAX*/,
+                                      bool a_fReplace /*= false*/) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pValue = createValue();
+    if (pValue)
+    {
+        int rc = putWorker(a_pszKey, pValue, a_fReplace, a_cchKey);
+        if (RT_SUCCESS(rc))
+            *a_ppValue = pValue;
+        else
+        {
+            delete pValue;
+            *a_ppValue = NULL;
+        }
+        return rc;
+    }
+    *a_ppValue = NULL;
+    return VERR_NO_MEMORY;
+}
+
+
+int RTCRestStringMapBase::putNewValue(RTCRestObjectBase **a_ppValue, RTCString const &a_rStrKey, bool a_fReplace /*= false*/) RT_NOEXCEPT
+{
+    return putNewValue(a_ppValue, a_rStrKey.c_str(), a_rStrKey.length(), a_fReplace);
+}
+
+
+/*********************************************************************************************************************************
+*   Protected methods                                                                                                            *
+*********************************************************************************************************************************/
+
+int RTCRestStringMapBase::copyMapWorkerNoThrow(RTCRestStringMapBase const &a_rThat) RT_NOEXCEPT
+{
+    Assert(this != &a_rThat);
+    clear();
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+
+    if (!a_rThat.m_fNullIndicator)
+    {
+        MapEntry const *pCur;
+        RTListForEachCpp(&a_rThat.m_ListHead, pCur, MapEntry, ListEntry)
+        {
+            int rc = putCopyWorker(pCur->strKey.c_str(), *pCur->pValue, true /*a_fReplace*/);
+            if (RT_SUCCESS(rc))
+            { /* likely */ }
+            else
+                return rc;
+        }
+    }
+
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestStringMapBase::copyMapWorkerMayThrow(RTCRestStringMapBase const &a_rThat)
+{
+    int rc = copyMapWorkerNoThrow(a_rThat);
+    if (RT_SUCCESS(rc))
+        return;
+    throw std::bad_alloc();
+}
+
+
+int RTCRestStringMapBase::putWorker(const char *a_pszKey, RTCRestObjectBase *a_pValue, bool a_fReplace,
+                                    size_t a_cchKey /*= RTSTR_MAX*/) RT_NOEXCEPT
+{
+    int rc;
+    MapEntry *pEntry =  new (std::nothrow) MapEntry;
+    if (pEntry)
+    {
+        rc = pEntry->strKey.assignNoThrow(a_pszKey, a_cchKey);
+        if (RT_SUCCESS(rc))
+        {
+            pEntry->Core.pszString = pEntry->strKey.c_str();
+            pEntry->Core.cchString = pEntry->strKey.length();
+            pEntry->pValue = a_pValue;
+            if (RTStrSpaceInsert(&m_Map, &pEntry->Core))
+            {
+                RTListAppend(&m_ListHead, &pEntry->ListEntry);
+                m_cEntries++;
+                m_fNullIndicator = false;
+                return VINF_SUCCESS;
+            }
+
+            Assert(!m_fNullIndicator);
+            if (!a_fReplace)
+                rc = VERR_ALREADY_EXISTS;
+            else
+            {
+                /* Just replace the pValue in the existing entry. */
+                MapEntry *pCollision = (MapEntry *)RTStrSpaceGet(&m_Map, a_pszKey);
+                if (pCollision)
+                {
+                    if (pCollision->pValue)
+                        delete pCollision->pValue;
+                    pCollision->pValue = a_pValue;
+                    pEntry->pValue = NULL; /* paranoia */
+                    rc = VWRN_ALREADY_EXISTS;
+                }
+                else
+                    rc = VERR_INTERNAL_ERROR;
+            }
+        }
+        delete pEntry;
+    }
+    else
+        rc = VERR_NO_MEMORY;
+    return rc;
+}
+
+
+int RTCRestStringMapBase::putCopyWorker(const char *a_pszKey, RTCRestObjectBase const &a_rValue, bool a_fReplace,
+                                        size_t a_cchKey /*= RTSTR_MAX*/) RT_NOEXCEPT
+{
+    int rc;
+    RTCRestObjectBase *pValueCopy = a_rValue.baseClone();
+    if (pValueCopy)
+    {
+        rc = putWorker(a_pszKey, pValueCopy, a_fReplace, a_cchKey);
+        if (RT_SUCCESS(rc))
+        { /* likely */ }
+        else
+            delete pValueCopy;
+    }
+    else
+        rc = VERR_NO_MEMORY;
+    return rc;
+}
+
+
+RTCRestObjectBase *RTCRestStringMapBase::getWorker(const char *a_pszKey) RT_NOEXCEPT
+{
+    if (isNull())
+        return NULL;
+
+    MapEntry *pHit = (MapEntry *)RTStrSpaceGet(&m_Map, a_pszKey);
+    if (pHit)
+        return pHit->pValue;
+    return NULL;
+}
+
+
+RTCRestObjectBase const *RTCRestStringMapBase::getWorker(const char *a_pszKey) const RT_NOEXCEPT
+{
+    if (isNull())
+        return NULL;
+
+    MapEntry const *pHit = (MapEntry const *)RTStrSpaceGet((PRTSTRSPACE)&m_Map, a_pszKey);
+    if (pHit)
+        return pHit->pValue;
+    return NULL;
+}
+
diff --git a/src/VBox/Runtime/common/rest/rest-binary.cpp b/src/VBox/Runtime/common/rest/rest-binary.cpp
new file mode 100644
index 00000000..f1308516
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/rest-binary.cpp
@@ -0,0 +1,708 @@
+/* $Id: rest-binary.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestBinary and Descendants.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restbase.h>
+#include <iprt/cpp/restclient.h>
+
+#include <iprt/assert.h>
+#include <iprt/errcore.h>
+#include <iprt/cpp/restoutput.h>
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+/** The default maximum download size. */
+#if ARCH_BITS == 32
+# define RTCREST_MAX_DOWNLOAD_SIZE_DEFAULT  _32M
+#else
+# define RTCREST_MAX_DOWNLOAD_SIZE_DEFAULT  _128M
+#endif
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestBinary Implementation.                                                                                                *
+*********************************************************************************************************************************/
+/**
+ * Default constructor.
+ */
+RTCRestBinary::RTCRestBinary() RT_NOEXCEPT
+    : m_pbData(NULL)
+    , m_cbData(0)
+    , m_cbAllocated(0)
+    , m_fFreeable(true)
+    , m_fReadOnly(false)
+{
+}
+
+
+/**
+ * Destructor.
+ */
+RTCRestBinary::~RTCRestBinary()
+{
+    freeData();
+}
+
+/**
+ * Safe copy assignment method.
+ */
+int RTCRestBinary::assignCopy(RTCRestBinary const &a_rThat) RT_NOEXCEPT
+{
+    freeData();
+    if (a_rThat.m_pbData)
+    {
+        m_pbData         = (uint8_t *)RTMemDup(a_rThat.m_pbData, a_rThat.m_cbAllocated);
+        AssertReturn(m_pbData, VERR_NO_MEMORY);
+        m_cbData         = a_rThat.m_cbData;
+        m_cbAllocated    = a_rThat.m_cbAllocated;
+        m_fFreeable      = true;
+        m_fReadOnly      = false;
+        m_fNullIndicator = false;
+    }
+    else
+        m_fNullIndicator = a_rThat.m_fNullIndicator;
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Safe buffer copy method.
+ */
+int RTCRestBinary::assignCopy(void const *a_pvData, size_t a_cbData) RT_NOEXCEPT
+{
+    if (   m_pbData == NULL
+        || m_fReadOnly
+        || a_cbData > m_cbAllocated)
+    {
+        freeData();
+        m_pbData      = (uint8_t *)RTMemDup(a_pvData, a_cbData);
+        AssertReturn(m_pbData, VERR_NO_MEMORY);
+        m_cbData      = a_cbData;
+        m_cbAllocated = a_cbData;
+        m_fFreeable   = true;
+        m_fReadOnly   = false;
+    }
+    else
+    {
+        m_cbData = a_cbData;
+        memcpy(m_pbData, a_pvData, a_cbData);
+    }
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Use the specified data buffer directly.
+ */
+int RTCRestBinary::assignReadOnly(void const *a_pvData, size_t a_cbData) RT_NOEXCEPT
+{
+    freeData();
+    if (a_pvData)
+    {
+        m_pbData         = (uint8_t *)a_pvData;
+        m_cbData         = a_cbData;
+        m_cbAllocated    = 0;
+        m_fFreeable      = false;
+        m_fReadOnly      = true;
+        m_fNullIndicator = false;
+    }
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Use the specified data buffer directly.
+ */
+int RTCRestBinary::assignWriteable(void *a_pvBuf, size_t a_cbBuf) RT_NOEXCEPT
+{
+    freeData();
+    if (a_pvBuf)
+    {
+        m_pbData         = (uint8_t *)a_pvBuf;
+        m_cbData         = a_cbBuf;
+        m_cbAllocated    = a_cbBuf;
+        m_fFreeable      = false;
+        m_fReadOnly      = false;
+        m_fNullIndicator = false;
+    }
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Frees the data held by the object and resets it default state.
+ */
+void RTCRestBinary::freeData() RT_NOEXCEPT
+{
+    if (m_fFreeable)
+        RTMemFree(m_pbData);
+    m_pbData        = NULL;
+    m_cbData        = 0;
+    m_cbAllocated   = 0;
+    m_fFreeable     = true;
+    m_fReadOnly     = false;
+}
+
+
+/* Overridden methods: */
+
+RTCRestObjectBase *RTCRestBinary::baseClone() const RT_NOEXCEPT
+{
+    RTCRestBinary *pClone = new (std::nothrow) RTCRestBinary();
+    if (pClone)
+    {
+        int rc = pClone->assignCopy(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestBinary::setNull(void) RT_NOEXCEPT
+{
+    freeData();
+    m_fNullIndicator = true;
+    return VINF_SUCCESS;
+}
+
+
+int RTCRestBinary::resetToDefault(void) RT_NOEXCEPT
+{
+    freeData();
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestBinary::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    AssertMsgFailed(("We should never get here!\n"));
+    a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestBinary::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NOT_SUPPORTED, "RTCRestBinary does not support deserialization!");
+}
+
+
+int RTCRestBinary::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    RT_NOREF(a_pDst, a_fFlags);
+    AssertFailedReturn(VERR_NOT_SUPPORTED);
+}
+
+
+int RTCRestBinary::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo/*= NULL*/,
+                              uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_rValue, a_pszName, a_fFlags);
+    AssertFailedReturn(RTErrInfoSet(a_pErrInfo, VERR_NOT_SUPPORTED, "RTCRestBinary does not support fromString()!"));
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestBinary::typeClass(void) const RT_NOEXCEPT
+{
+    return kTypeClass_Binary;
+}
+
+
+const char *RTCRestBinary::typeName(void) const RT_NOEXCEPT
+{
+    return "RTCRestBinary";
+}
+
+
+/** Factory method. */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestBinary::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestBinary();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestBinary::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj;
+    *a_ppInstance = pObj = createInstance();
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestBinaryParameter Implementation.                                                                                       *
+*********************************************************************************************************************************/
+
+/**
+ * Default constructor.
+ */
+RTCRestBinaryParameter::RTCRestBinaryParameter() RT_NOEXCEPT
+    : RTCRestBinary()
+    , m_cbContentLength(UINT64_MAX)
+    , m_strContentType()
+    , m_pfnProducer(NULL)
+    , m_pvCallbackData(NULL)
+{
+}
+
+
+int RTCRestBinaryParameter::assignCopy(RTCRestBinaryParameter const &a_rThat) RT_NOEXCEPT
+{
+    AssertReturn(a_rThat.m_pfnProducer, VERR_INVALID_STATE);
+    int rc = assignCopy(*(RTCRestBinary const *)&a_rThat);
+    if (RT_SUCCESS(rc))
+        rc = m_strContentType.assignNoThrow(a_rThat.m_strContentType);
+    m_cbContentLength = a_rThat.m_cbContentLength;
+    m_pfnProducer = a_rThat.m_pfnProducer;
+    m_pvCallbackData = a_rThat.m_pvCallbackData;
+    return VINF_SUCCESS;
+}
+
+
+int RTCRestBinaryParameter::assignCopy(RTCRestBinary const &a_rThat) RT_NOEXCEPT
+{
+    m_cbContentLength = a_rThat.getSize();
+    m_strContentType.setNull();
+    m_pfnProducer     = NULL;
+    m_pvCallbackData  = NULL;
+    return RTCRestBinary::assignCopy(a_rThat);
+}
+
+
+int RTCRestBinaryParameter::assignCopy(void const *a_pvData, size_t a_cbData) RT_NOEXCEPT
+{
+    m_cbContentLength = a_cbData;
+    m_pfnProducer     = NULL;
+    m_pvCallbackData  = NULL;
+    return RTCRestBinary::assignCopy(a_pvData, a_cbData);
+}
+
+
+int RTCRestBinaryParameter::assignReadOnly(void const *a_pvData, size_t a_cbData) RT_NOEXCEPT
+{
+    m_cbContentLength = a_cbData;
+    m_pfnProducer     = NULL;
+    m_pvCallbackData  = NULL;
+    return RTCRestBinary::assignReadOnly(a_pvData, a_cbData);
+}
+
+
+int RTCRestBinaryParameter::assignWriteable(void *a_pvBuf, size_t a_cbBuf) RT_NOEXCEPT
+{
+    AssertMsgFailed(("Please use assignReadOnly!\n"));
+    return assignReadOnly(a_pvBuf, a_cbBuf);
+}
+
+
+RTCRestObjectBase *RTCRestBinaryParameter::baseClone() const RT_NOEXCEPT
+{
+    RTCRestBinaryParameter *pClone = new (std::nothrow) RTCRestBinaryParameter();
+    if (pClone)
+    {
+        int rc = pClone->assignCopy(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestBinaryParameter::resetToDefault() RT_NOEXCEPT
+{
+    m_cbContentLength = UINT64_MAX;
+    m_pfnProducer     = NULL;
+    m_pvCallbackData  = NULL;
+    return RTCRestBinary::resetToDefault();
+}
+
+
+const char *RTCRestBinaryParameter::typeName(void) const RT_NOEXCEPT
+{
+    return "RTCRestBinaryParameter";
+}
+
+
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestBinaryParameter::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestBinaryParameter();
+}
+
+
+int RTCRestBinaryParameter::setContentType(const char *a_pszContentType) RT_NOEXCEPT
+{
+    return m_strContentType.assignNoThrow(a_pszContentType);
+}
+
+
+void RTCRestBinaryParameter::setProducerCallback(PFNPRODUCER a_pfnProducer,  void *a_pvCallbackData /*= NULL*/,
+                                                 uint64_t a_cbContentLength /*= UINT64_MAX*/) RT_NOEXCEPT
+{
+    freeData();
+
+    m_pfnProducer     = a_pfnProducer;
+    m_pvCallbackData  = a_pvCallbackData;
+    m_cbContentLength = a_cbContentLength;
+}
+
+
+int RTCRestBinaryParameter::xmitPrepare(RTHTTP a_hHttp) const RT_NOEXCEPT
+{
+    AssertReturn(m_pbData != NULL || m_pfnProducer != NULL || m_cbContentLength == 0, VERR_INVALID_STATE);
+
+
+    /*
+     * Set the content type if given.
+     */
+    if (m_strContentType.isNotEmpty())
+    {
+        Assert(!RTHttpGetHeader(a_hHttp, RT_STR_TUPLE("Content-Type")));
+        int rc = RTHttpAddHeader(a_hHttp, "Content-Type", m_strContentType.c_str(), m_strContentType.length(),
+                                 RTHTTPADDHDR_F_BACK);
+        AssertRCReturn(rc, rc);
+    }
+
+    /*
+     * Set the content length if given.
+     */
+    if (m_cbContentLength != UINT64_MAX)
+    {
+        const char *pszContentLength = RTHttpGetHeader(a_hHttp, RT_STR_TUPLE("Content-Length"));
+        AssertMsgReturn(!pszContentLength || RTStrToUInt64(pszContentLength) == m_cbContentLength,
+                        ("pszContentLength=%s does not match m_cbContentLength=%RU64\n", pszContentLength, m_cbContentLength),
+                        VERR_MISMATCH);
+        if (!pszContentLength)
+        {
+            char szValue[64];
+            ssize_t cchValue = RTStrFormatU64(szValue, sizeof(szValue), m_cbContentLength, 10, 0, 0, 0);
+            int rc = RTHttpAddHeader(a_hHttp, "Content-Length", szValue, cchValue, RTHTTPADDHDR_F_BACK);
+            AssertRCReturn(rc, rc);
+        }
+    }
+
+    /*
+     * Register an upload callback.
+     */
+    int rc = RTHttpSetUploadCallback(a_hHttp, m_cbContentLength, xmitHttpCallback, (RTCRestBinaryParameter *)this);
+    AssertRCReturn(rc, rc);
+
+    return VINF_SUCCESS;
+
+}
+
+
+/*static*/ DECLCALLBACK(int)
+RTCRestBinaryParameter::xmitHttpCallback(RTHTTP hHttp, void *pvBuf, size_t cbBuf,
+                                         uint64_t offContent, size_t *pcbActual, void *pvUser) RT_NOEXCEPT
+{
+    RTCRestBinaryParameter *pThis = (RTCRestBinaryParameter *)pvUser;
+
+    /*
+     * Call the user upload callback if we've got one.
+     */
+    if (pThis->m_pfnProducer)
+        return pThis->m_pfnProducer(pThis, pvBuf, cbBuf, offContent, pcbActual);
+
+    /*
+     * Feed from the memory buffer.
+     */
+    if (offContent < pThis->m_cbContentLength)
+    {
+        uint64_t const cbLeft = pThis->m_cbContentLength - offContent;
+        size_t const cbToCopy = cbLeft >= cbBuf ? cbBuf : (size_t)cbLeft;
+        memcpy(pvBuf, &pThis->m_pbData[(size_t)offContent], cbToCopy);
+        *pcbActual = cbToCopy;
+    }
+    else
+        *pcbActual = 0;
+
+    RT_NOREF(hHttp);
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestBinaryParameter::xmitComplete(RTHTTP a_hHttp) const RT_NOEXCEPT
+{
+    /* Unset the callback. */
+    int rc = RTHttpSetUploadCallback(a_hHttp, UINT64_MAX, NULL, NULL);
+    AssertRC(rc);
+}
+
+
+/*********************************************************************************************************************************
+*   RTCRestBinaryResponse Implementation.                                                                                        *
+*********************************************************************************************************************************/
+
+/**
+ * Default constructor.
+ */
+RTCRestBinaryResponse::RTCRestBinaryResponse() RT_NOEXCEPT
+    : RTCRestBinary()
+    , m_cbContentLength(UINT64_MAX)
+    , m_cbDownloaded(0)
+    , m_pfnConsumer(NULL)
+    , m_pvCallbackData(NULL)
+    , m_cbMaxDownload(RTCREST_MAX_DOWNLOAD_SIZE_DEFAULT)
+{
+}
+
+
+int RTCRestBinaryResponse::assignCopy(RTCRestBinaryResponse const &a_rThat) RT_NOEXCEPT
+{
+    AssertReturn(a_rThat.m_pfnConsumer, VERR_INVALID_STATE);
+    int rc = assignCopy(*(RTCRestBinary const *)&a_rThat);
+    m_cbContentLength = a_rThat.m_cbContentLength;
+    m_cbDownloaded    = a_rThat.m_cbDownloaded;
+    m_cbMaxDownload   = a_rThat.m_cbMaxDownload;
+    return rc;
+}
+
+
+int RTCRestBinaryResponse::assignCopy(RTCRestBinary const &a_rThat) RT_NOEXCEPT
+{
+    m_cbContentLength = UINT64_MAX;
+    m_cbDownloaded    = 0;
+    m_pfnConsumer     = NULL;
+    m_pvCallbackData  = NULL;
+    return RTCRestBinary::assignCopy(a_rThat);
+}
+
+
+int RTCRestBinaryResponse::assignCopy(void const *a_pvData, size_t a_cbData) RT_NOEXCEPT
+{
+    RT_NOREF(a_pvData, a_cbData);
+    AssertMsgFailedReturn(("Makes no sense for downloads.\n"), VERR_INVALID_STATE);
+}
+
+
+int RTCRestBinaryResponse::assignReadOnly(void const *a_pvData, size_t a_cbData) RT_NOEXCEPT
+{
+    RT_NOREF(a_pvData, a_cbData);
+    AssertMsgFailedReturn(("Makes no sense for downloads.\n"), VERR_INVALID_STATE);
+}
+
+
+int RTCRestBinaryResponse::assignWriteable(void *a_pvBuf, size_t a_cbBuf) RT_NOEXCEPT
+{
+    m_cbContentLength = UINT64_MAX;
+    m_cbDownloaded    = 0;
+    m_pfnConsumer     = NULL;
+    m_pvCallbackData  = NULL;
+    AssertStmt(a_cbBuf <= m_cbMaxDownload, m_cbMaxDownload = a_cbBuf);
+    return RTCRestBinary::assignWriteable(a_pvBuf, a_cbBuf);
+}
+
+
+RTCRestObjectBase *RTCRestBinaryResponse::baseClone() const RT_NOEXCEPT
+{
+    RTCRestBinaryResponse *pClone = new (std::nothrow) RTCRestBinaryResponse();
+    if (pClone)
+    {
+        int rc = pClone->assignCopy(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestBinaryResponse::resetToDefault() RT_NOEXCEPT
+{
+    m_cbContentLength = UINT64_MAX;
+    m_cbDownloaded    = 0;
+    m_pfnConsumer     = NULL;
+    m_pvCallbackData  = NULL;
+    m_cbMaxDownload   = RTCREST_MAX_DOWNLOAD_SIZE_DEFAULT;
+    return RTCRestBinary::resetToDefault();
+}
+
+
+const char *RTCRestBinaryResponse::typeName(void) const RT_NOEXCEPT
+{
+    return "RTCRestBinaryResponse";
+}
+
+
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestBinaryResponse::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestBinaryResponse();
+}
+
+
+void RTCRestBinaryResponse::setMaxDownloadSize(size_t a_cbMaxDownload) RT_NOEXCEPT
+{
+    if (a_cbMaxDownload == 0)
+        m_cbMaxDownload = RTCREST_MAX_DOWNLOAD_SIZE_DEFAULT;
+    else
+        m_cbMaxDownload = a_cbMaxDownload;
+}
+
+
+void RTCRestBinaryResponse::setConsumerCallback(PFNCONSUMER a_pfnConsumer, void *a_pvCallbackData /*= NULL*/) RT_NOEXCEPT
+{
+    freeData();
+
+    m_pfnConsumer     = a_pfnConsumer;
+    m_pvCallbackData  = a_pvCallbackData;
+    m_cbDownloaded    = 0;
+    m_cbContentLength = UINT64_MAX;
+}
+
+
+int RTCRestBinaryResponse::receivePrepare(RTHTTP a_hHttp, uint32_t a_fCallbackFlags) RT_NOEXCEPT
+{
+    AssertReturn(!m_fReadOnly, VERR_INVALID_STATE);
+
+    /*
+     * Register the download callback.
+     */
+    int rc = RTHttpSetDownloadCallback(a_hHttp, a_fCallbackFlags, receiveHttpCallback, this);
+    AssertRC(rc);
+    return rc;
+}
+
+
+/*static*/ DECLCALLBACK(int)
+RTCRestBinaryResponse::receiveHttpCallback(RTHTTP hHttp, void const *pvBuf, size_t cbBuf, uint32_t uHttpStatus,
+                                           uint64_t offContent, uint64_t cbContent, void *pvUser) RT_NOEXCEPT
+{
+    RTCRestBinaryResponse *pThis = (RTCRestBinaryResponse *)pvUser;
+    Assert(offContent == pThis->m_cbDownloaded);
+    pThis->m_cbContentLength = cbContent;
+
+    /*
+     * Call the user download callback if we've got one.
+     */
+    if (pThis->m_pfnConsumer)
+    {
+        int rc = pThis->m_pfnConsumer(pThis, pvBuf, cbBuf, uHttpStatus, offContent, cbContent);
+        if (RT_SUCCESS(rc))
+            pThis->m_cbDownloaded = offContent + cbBuf;
+        return rc;
+    }
+
+    /*
+     * Check download limit before adding more data.
+     */
+    AssertMsgReturn(offContent + cbBuf <= pThis->m_cbMaxDownload,
+                    ("%RU64 + %zu = %RU64; max=%RU64", offContent, cbBuf, offContent + cbBuf, pThis->m_cbMaxDownload),
+                    VERR_TOO_MUCH_DATA);
+
+    /*
+     * Make sure we've got sufficient writable buffer space before we copy in the data.
+     */
+    AssertReturn(!pThis->m_fReadOnly, VERR_INVALID_STATE);
+    if (offContent + cbBuf <= pThis->m_cbAllocated)
+    { /* likely, except for the first time. */ }
+    else
+    {
+        AssertMsgReturn(pThis->m_fFreeable,
+                        ("offContent=%RU64 cbBuf=%zu m_cbAllocated=%zu", offContent, cbBuf, pThis->m_cbAllocated),
+                        VERR_TOO_MUCH_DATA);
+        AssertMsgReturn(cbContent <= pThis->m_cbMaxDownload || cbContent == UINT64_MAX,
+                        ("cbContent: %RU64; max=%RU64", cbContent,  pThis->m_cbMaxDownload),
+                        VERR_TOO_MUCH_DATA);
+
+        if (offContent == 0 && cbContent != UINT64_MAX)
+        {
+            void *pvNew = RTMemRealloc(pThis->m_pbData, (size_t)cbContent);
+            if (!pvNew)
+                return VERR_NO_MEMORY;
+            pThis->m_pbData = (uint8_t *)pvNew;
+            pThis->m_cbAllocated = (size_t)cbContent;
+        }
+        else
+        {
+            size_t cbNeeded = offContent + cbBuf;
+            size_t cbNew;
+            if (pThis->m_cbAllocated == 0)
+                cbNew = RT_MAX(_64K, RT_ALIGN_Z(cbNeeded, _64K));
+            else if (pThis->m_cbAllocated < _64M && cbNeeded <= _64M)
+            {
+                cbNew = pThis->m_cbAllocated * 2;
+                while (cbNew < cbNeeded)
+                    cbNew *= 2;
+            }
+            else
+                cbNew = RT_ALIGN_Z(cbNeeded, _32M);
+
+            void *pvNew = RTMemRealloc(pThis->m_pbData, cbNew);
+            if (!pvNew)
+                return VERR_NO_MEMORY;
+            pThis->m_pbData = (uint8_t *)pvNew;
+            pThis->m_cbAllocated = cbNew;
+        }
+    }
+
+    /*
+     * Do the copying.
+     */
+    memcpy(&pThis->m_pbData[(size_t)offContent], pvBuf, cbBuf);
+    pThis->m_cbDownloaded = offContent + cbBuf;
+
+    /* we cap it at m_cbMaxDownload which is size_t so this cast is safe */
+    pThis->m_cbData = (size_t)pThis->m_cbDownloaded;
+
+    RT_NOREF(hHttp);
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestBinaryResponse::receiveComplete(RTHTTP a_hHttp) RT_NOEXCEPT
+{
+    /* Unset the callback. */
+    int rc = RTHttpSetDownloadCallback(a_hHttp, RTHTTPDOWNLOAD_F_ANY_STATUS, NULL, NULL);
+    AssertRC(rc);
+}
+
diff --git a/src/VBox/Runtime/common/rest/rest-primary-object-types.cpp b/src/VBox/Runtime/common/rest/rest-primary-object-types.cpp
new file mode 100644
index 00000000..9657a018
--- /dev/null
+++ b/src/VBox/Runtime/common/rest/rest-primary-object-types.cpp
@@ -0,0 +1,2403 @@
+/* $Id: rest-primary-object-types.cpp $ */
+/** @file
+ * IPRT - C++ REST, RTCRestObjectBase implementation.
+ */
+
+/*
+ * Copyright (C) 2018-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_REST
+#include <iprt/cpp/restbase.h>
+
+#include <iprt/ctype.h>
+#include <iprt/err.h>
+#include <iprt/string.h>
+#include <iprt/cpp/restoutput.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestObjectBase implementation                                                                                             *
+*********************************************************************************************************************************/
+
+/** Default constructor. */
+RTCRestObjectBase::RTCRestObjectBase() RT_NOEXCEPT
+    : m_fNullIndicator(false)
+{
+}
+
+
+/** Copy constructor. */
+RTCRestObjectBase::RTCRestObjectBase(RTCRestObjectBase const &a_rThat) RT_NOEXCEPT
+    : m_fNullIndicator(a_rThat.m_fNullIndicator)
+{
+}
+
+
+/** Destructor. */
+RTCRestObjectBase::~RTCRestObjectBase()
+{
+    /* nothing to do */
+}
+
+
+/** Copy assignment operator. */
+RTCRestObjectBase &RTCRestObjectBase::operator=(RTCRestObjectBase const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    return *this;
+}
+
+
+int RTCRestObjectBase::setNull() RT_NOEXCEPT
+{
+    int rc = resetToDefault();
+    m_fNullIndicator = true;
+    return rc;
+}
+
+
+void RTCRestObjectBase::setNotNull() RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+}
+
+
+int RTCRestObjectBase::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    /*
+     * Just wrap the JSON serialization method.
+     */
+    RTCRestOutputToString Tmp(a_pDst, RT_BOOL(a_fFlags & kToString_Append));
+    serializeAsJson(Tmp);
+    return Tmp.finalize() ? VINF_SUCCESS : VERR_NO_MEMORY;
+}
+
+
+RTCString RTCRestObjectBase::toString() const
+{
+    RTCString strRet;
+    toString(&strRet, 0);
+    return strRet;
+}
+
+
+int RTCRestObjectBase::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                                  uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_fFlags);
+
+    /*
+     * Just wrap the JSON serialization method.
+     */
+    RTJSONVAL hValue = NIL_RTJSONVAL;
+    int rc = RTJsonParseFromString(&hValue, a_rValue.c_str(), a_pErrInfo);
+    if (RT_SUCCESS(rc))
+    {
+        RTCRestJsonPrimaryCursor PrimaryCursor(hValue, a_pszName, a_pErrInfo);
+        rc = deserializeFromJson(PrimaryCursor.m_Cursor);
+    }
+    return rc;
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestBool implementation                                                                                                   *
+*********************************************************************************************************************************/
+
+/** Factory method. */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestBool::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestBool();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestBool::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+/** Default constructor. */
+RTCRestBool::RTCRestBool() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_fValue(false)
+{
+}
+
+
+/** Copy constructor. */
+RTCRestBool::RTCRestBool(RTCRestBool const &a_rThat) RT_NOEXCEPT
+    : RTCRestObjectBase(a_rThat)
+    , m_fValue(a_rThat.m_fValue)
+{
+}
+
+
+/** From value constructor. */
+RTCRestBool::RTCRestBool(bool fValue) RT_NOEXCEPT
+    : m_fValue(fValue)
+{
+}
+
+
+/** Destructor. */
+RTCRestBool::~RTCRestBool()
+{
+    /* nothing to do */
+}
+
+
+/** Copy assignment operator. */
+RTCRestBool &RTCRestBool::operator=(RTCRestBool const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_fValue = a_rThat.m_fValue;
+    return *this;
+}
+
+
+int RTCRestBool::assignCopy(RTCRestBool const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_fValue = a_rThat.m_fValue;
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestBool::assignValue(bool a_fValue) RT_NOEXCEPT
+{
+    m_fValue = a_fValue;
+    m_fNullIndicator = false;
+}
+
+
+RTCRestObjectBase *RTCRestBool::baseClone() const RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestBool(*this);
+}
+
+
+int RTCRestBool::resetToDefault() RT_NOEXCEPT
+{
+    m_fValue = false;
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestBool::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    a_rDst.printf(!m_fNullIndicator ? m_fValue ? "true" : "false" : "null");
+    return a_rDst;
+}
+
+
+int RTCRestBool::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    m_fValue = false;
+    m_fNullIndicator = false;
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+
+    if (enmType == RTJSONVALTYPE_TRUE)
+    {
+        m_fValue = true;
+        return VINF_SUCCESS;
+    }
+
+    if (enmType == RTJSONVALTYPE_FALSE)
+        return VINF_SUCCESS;
+
+    if (enmType == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_BOOL, "wrong JSON type %s for boolean",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestBool::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    if (!(a_fFlags & kToString_Append))
+    {
+        if (!m_fNullIndicator)
+        {
+            if (m_fValue)
+                return a_pDst->assignNoThrow(RT_STR_TUPLE("true"));
+            return a_pDst->assignNoThrow(RT_STR_TUPLE("false"));
+        }
+        return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+    }
+
+    if (!m_fNullIndicator)
+    {
+        if (m_fValue)
+            return a_pDst->appendNoThrow(RT_STR_TUPLE("true"));
+        return a_pDst->appendNoThrow(RT_STR_TUPLE("false"));
+    }
+    return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+}
+
+
+int RTCRestBool::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                            uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_fFlags);
+
+    if (a_rValue.startsWithWord("true", RTCString::CaseInsensitive))
+    {
+        m_fValue = true;
+        m_fNullIndicator = false;
+    }
+    else if (a_rValue.startsWithWord("false", RTCString::CaseInsensitive))
+    {
+        m_fValue = false;
+        m_fNullIndicator = false;
+    }
+    else if (a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+    {
+        m_fValue = false;
+        m_fNullIndicator = true;
+    }
+    else
+        return RTErrInfoSetF(a_pErrInfo, VERR_REST_UNABLE_TO_PARSE_STRING_AS_BOOL,
+                             "%s: unable to parse '%s' as bool", a_pszName, a_rValue.c_str());
+    return VINF_SUCCESS;
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestBool::typeClass() const RT_NOEXCEPT
+{
+    return kTypeClass_Bool;
+}
+
+
+const char *RTCRestBool::typeName() const RT_NOEXCEPT
+{
+    return "bool";
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestInt64 implementation                                                                                                  *
+*********************************************************************************************************************************/
+
+/** Factory method. */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestInt64::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestInt64();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestInt64::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+/** Default constructor. */
+RTCRestInt64::RTCRestInt64() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_iValue(0)
+{
+}
+
+
+/** Copy constructor. */
+RTCRestInt64::RTCRestInt64(RTCRestInt64 const &a_rThat) RT_NOEXCEPT
+    : RTCRestObjectBase(a_rThat)
+    , m_iValue(a_rThat.m_iValue)
+{
+}
+
+
+/** From value constructor. */
+RTCRestInt64::RTCRestInt64(int64_t iValue) RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_iValue(iValue)
+{
+}
+
+
+/** Destructor. */
+RTCRestInt64::~RTCRestInt64()
+{
+    /* nothing to do */
+}
+
+
+/** Copy assignment operator. */
+RTCRestInt64 &RTCRestInt64::operator=(RTCRestInt64 const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_iValue = a_rThat.m_iValue;
+    return *this;
+}
+
+
+int RTCRestInt64::assignCopy(RTCRestInt64 const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_iValue = a_rThat.m_iValue;
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestInt64::assignValue(int64_t a_iValue) RT_NOEXCEPT
+{
+    m_iValue = a_iValue;
+    m_fNullIndicator = false;
+}
+
+
+RTCRestObjectBase *RTCRestInt64::baseClone() const RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestInt64(*this);
+}
+
+
+int RTCRestInt64::resetToDefault() RT_NOEXCEPT
+{
+    m_iValue = 0;
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestInt64::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+        a_rDst.printf("%RI64", m_iValue);
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestInt64::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    m_iValue = 0;
+    m_fNullIndicator = false;
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    if (enmType == RTJSONVALTYPE_INTEGER)
+    {
+        int rc = RTJsonValueQueryInteger(a_rCursor.m_hValue, &m_iValue);
+        if (RT_SUCCESS(rc))
+            return rc;
+        return a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonValueQueryInteger failed with %Rrc", rc);
+    }
+
+    if (enmType == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    /* This is probably non-sense... */
+    if (enmType == RTJSONVALTYPE_TRUE)
+        m_iValue = 1;
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_INTEGER, "wrong JSON type %s for 64-bit integer",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestInt64::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    if (!(a_fFlags & kToString_Append))
+    {
+        if (!m_fNullIndicator)
+            return a_pDst->printfNoThrow("%RI64", m_iValue);
+        return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+    }
+    if (!m_fNullIndicator)
+        return a_pDst->appendPrintfNoThrow("%RI64", m_iValue);
+    return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+}
+
+
+int RTCRestInt64::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                             uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_fFlags);
+
+    m_iValue = 0;
+    m_fNullIndicator = false;
+
+/** @todo RTStrStripL and RTStrToInt64Full has a different idea what consitutes spaces... */
+    int rc = RTStrToInt64Full(RTStrStripL(a_rValue.c_str()), 0, &m_iValue);
+    if (rc == VINF_SUCCESS || rc == VERR_TRAILING_SPACES)
+        return VINF_SUCCESS;
+
+    if (a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+    {
+        m_iValue = 0;
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    return RTErrInfoSetF(a_pErrInfo, rc, "%s: error %Rrc parsing '%s' as int64_t", a_pszName, rc, a_rValue.c_str());
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestInt64::typeClass() const RT_NOEXCEPT
+{
+    return kTypeClass_Int64;
+}
+
+
+const char *RTCRestInt64::typeName() const RT_NOEXCEPT
+{
+    return "int64_t";
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestInt32 implementation                                                                                                  *
+*********************************************************************************************************************************/
+
+/** Factory method. */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestInt32::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestInt32();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestInt32::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+/** Default constructor. */
+RTCRestInt32::RTCRestInt32() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_iValue(0)
+{
+}
+
+
+/** Copy constructor. */
+RTCRestInt32::RTCRestInt32(RTCRestInt32 const &a_rThat) RT_NOEXCEPT
+    : RTCRestObjectBase(a_rThat)
+    , m_iValue(a_rThat.m_iValue)
+{
+}
+
+
+/** From value constructor. */
+RTCRestInt32::RTCRestInt32(int32_t iValue) RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_iValue(iValue)
+{
+}
+
+
+/** Destructor. */
+RTCRestInt32::~RTCRestInt32() RT_NOEXCEPT
+{
+    /* nothing to do */
+}
+
+
+/** Copy assignment operator. */
+RTCRestInt32 &RTCRestInt32::operator=(RTCRestInt32 const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_iValue = a_rThat.m_iValue;
+    return *this;
+}
+
+
+int RTCRestInt32::assignCopy(RTCRestInt32 const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_iValue = a_rThat.m_iValue;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestObjectBase *RTCRestInt32::baseClone() const RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestInt32(*this);
+}
+
+
+int RTCRestInt32::resetToDefault() RT_NOEXCEPT
+{
+    m_iValue = 0;
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestInt32::assignValue(int32_t a_iValue) RT_NOEXCEPT
+{
+    m_iValue = a_iValue;
+    m_fNullIndicator = false;
+}
+
+
+RTCRestOutputBase &RTCRestInt32::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+        a_rDst.printf("%RI32", m_iValue);
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestInt32::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    m_iValue = 0;
+    m_fNullIndicator = false;
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    if (enmType == RTJSONVALTYPE_INTEGER)
+    {
+        int64_t iTmp = m_iValue;
+        int rc = RTJsonValueQueryInteger(a_rCursor.m_hValue, &iTmp);
+        if (RT_SUCCESS(rc))
+        {
+            m_iValue = (int32_t)iTmp;
+            if (m_iValue == iTmp)
+                return rc;
+            return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_OUT_OF_RANGE, "value %RI64 does not fit in 32 bits", iTmp);
+        }
+        return a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonValueQueryInteger failed with %Rrc", rc);
+    }
+
+    if (enmType == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    /* This is probably non-sense... */
+    if (enmType == RTJSONVALTYPE_TRUE)
+        m_iValue = 1;
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_INTEGER, "wrong JSON type %s for 32-bit integer",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestInt32::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    if (!(a_fFlags & kToString_Append))
+    {
+        if (!m_fNullIndicator)
+            return a_pDst->printfNoThrow("%RI32", m_iValue);
+        return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+    }
+    if (!m_fNullIndicator)
+        return a_pDst->appendPrintfNoThrow("%RI32", m_iValue);
+    return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+}
+
+
+int RTCRestInt32::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                             uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_fFlags);
+
+    m_iValue = 0;
+    m_fNullIndicator = false;
+
+/** @todo RTStrStripL and RTStrToInt32Full has a different idea what consitutes spaces... */
+    int rc = RTStrToInt32Full(RTStrStripL(a_rValue.c_str()), 0, &m_iValue);
+    if (rc == VINF_SUCCESS || rc == VERR_TRAILING_SPACES)
+        return VINF_SUCCESS;
+
+    if (a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+    {
+        m_iValue = 0;
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    return RTErrInfoSetF(a_pErrInfo, rc, "%s: error %Rrc parsing '%s' as int32_t", a_pszName, rc, a_rValue.c_str());
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestInt32::typeClass() const RT_NOEXCEPT
+{
+    return kTypeClass_Int32;
+}
+
+
+const char *RTCRestInt32::typeName() const RT_NOEXCEPT
+{
+    return "int32_t";
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestInt16 implementation                                                                                                  *
+*********************************************************************************************************************************/
+
+/** Factory method. */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestInt16::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestInt16();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestInt16::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+/** Default constructor. */
+RTCRestInt16::RTCRestInt16() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_iValue(0)
+{
+}
+
+
+/** Copy constructor. */
+RTCRestInt16::RTCRestInt16(RTCRestInt16 const &a_rThat) RT_NOEXCEPT
+    : RTCRestObjectBase(a_rThat)
+    , m_iValue(a_rThat.m_iValue)
+{
+}
+
+
+/** From value constructor. */
+RTCRestInt16::RTCRestInt16(int16_t iValue) RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_iValue(iValue)
+{
+}
+
+
+/** Destructor. */
+RTCRestInt16::~RTCRestInt16()
+{
+    /* nothing to do */
+}
+
+
+/** Copy assignment operator. */
+RTCRestInt16 &RTCRestInt16::operator=(RTCRestInt16 const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_iValue = a_rThat.m_iValue;
+    return *this;
+}
+
+
+int RTCRestInt16::assignCopy(RTCRestInt16 const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_iValue = a_rThat.m_iValue;
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestInt16::assignValue(int16_t a_iValue) RT_NOEXCEPT
+{
+    m_iValue = a_iValue;
+    m_fNullIndicator = false;
+}
+
+
+RTCRestObjectBase *RTCRestInt16::baseClone() const RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestInt16(*this);
+}
+
+
+int RTCRestInt16::resetToDefault() RT_NOEXCEPT
+{
+    m_iValue = 0;
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestInt16::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+        a_rDst.printf("%RI16", m_iValue);
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestInt16::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    m_iValue = 0;
+    m_fNullIndicator = false;
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    if (enmType == RTJSONVALTYPE_INTEGER)
+    {
+        int64_t iTmp = m_iValue;
+        int rc = RTJsonValueQueryInteger(a_rCursor.m_hValue, &iTmp);
+        if (RT_SUCCESS(rc))
+        {
+            m_iValue = (int16_t)iTmp;
+            if (m_iValue == iTmp)
+                return rc;
+            return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_OUT_OF_RANGE, "value %RI64 does not fit in 16 bits", iTmp);
+        }
+        return a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonValueQueryInteger failed with %Rrc", rc);
+    }
+
+    if (enmType == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    /* This is probably non-sense... */
+    if (enmType == RTJSONVALTYPE_TRUE)
+        m_iValue = 1;
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_INTEGER, "wrong JSON type %s for 16-bit integer",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestInt16::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    if (!(a_fFlags & kToString_Append))
+    {
+        if (!m_fNullIndicator)
+            return a_pDst->printfNoThrow("%RI16", m_iValue);
+        return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+    }
+    if (!m_fNullIndicator)
+        return a_pDst->appendPrintfNoThrow("%RI16", m_iValue);
+    return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+}
+
+
+int RTCRestInt16::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                             uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_fFlags);
+
+    m_iValue = 0;
+    m_fNullIndicator = false;
+
+/** @todo RTStrStripL and RTStrToInt16Full has a different idea what consitutes spaces... */
+    int rc = RTStrToInt16Full(RTStrStripL(a_rValue.c_str()), 0, &m_iValue);
+    if (rc == VINF_SUCCESS || rc == VERR_TRAILING_SPACES)
+        return VINF_SUCCESS;
+
+    if (a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+    {
+        m_iValue = 0;
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    return RTErrInfoSetF(a_pErrInfo, rc, "%s: error %Rrc parsing '%s' as int16_t", a_pszName, rc, a_rValue.c_str());
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestInt16::typeClass() const RT_NOEXCEPT
+{
+    return kTypeClass_Int16;
+}
+
+
+const char *RTCRestInt16::typeName() const RT_NOEXCEPT
+{
+    return "int16_t";
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestDouble implementation                                                                                                 *
+*********************************************************************************************************************************/
+
+/** Factory method. */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestDouble::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestDouble();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestDouble::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+/** Default constructor. */
+RTCRestDouble::RTCRestDouble() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_rdValue(0.0)
+{
+}
+
+
+/** Copy constructor. */
+RTCRestDouble::RTCRestDouble(RTCRestDouble const &a_rThat) RT_NOEXCEPT
+    : RTCRestObjectBase(a_rThat)
+    , m_rdValue(a_rThat.m_rdValue)
+{
+}
+
+
+/** From value constructor. */
+RTCRestDouble::RTCRestDouble(double rdValue) RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_rdValue(rdValue)
+{
+}
+
+
+/** Destructor. */
+RTCRestDouble::~RTCRestDouble()
+{
+    /* nothing to do */
+}
+
+
+/** Copy assignment operator. */
+RTCRestDouble &RTCRestDouble::operator=(RTCRestDouble const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_rdValue = a_rThat.m_rdValue;
+    return *this;
+}
+
+
+int RTCRestDouble::assignCopy(RTCRestDouble const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_rdValue = a_rThat.m_rdValue;
+    return VINF_SUCCESS;
+}
+
+
+void RTCRestDouble::assignValue(double a_rdValue) RT_NOEXCEPT
+{
+    m_rdValue = a_rdValue;
+    m_fNullIndicator = false;
+}
+
+
+RTCRestObjectBase *RTCRestDouble::baseClone() const RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestDouble(*this);
+}
+
+
+int RTCRestDouble::resetToDefault() RT_NOEXCEPT
+{
+    m_rdValue = 0.0;
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestDouble::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+    {
+
+        /* Just a simple approximation here. */
+        /** @todo Not 100% sure printf %g produces the right result for JSON floating point, but it'll have to do for now... */
+        char szValue[128];
+#ifdef _MSC_VER
+        _snprintf(szValue, sizeof(szValue), "%.18g", m_rdValue);
+#else
+        snprintf(szValue, sizeof(szValue), "%.18g", m_rdValue);
+#endif
+        size_t cchValue = strlen(szValue);
+        while (cchValue > 0 && szValue[cchValue - 1] == '0')
+            cchValue--;
+        szValue[cchValue] = '\0';
+
+        a_rDst.printf("%s", szValue);
+    }
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestDouble::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    m_rdValue = 0.0;
+    m_fNullIndicator = false;
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    if (enmType == RTJSONVALTYPE_NUMBER)
+    {
+        int rc = RTJsonValueQueryNumber(a_rCursor.m_hValue, &m_rdValue);
+        if (RT_SUCCESS(rc))
+            return rc;
+        return a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonValueQueryNumber failed with %Rrc", rc);
+    }
+
+    if (enmType == RTJSONVALTYPE_INTEGER)
+    {
+        int64_t iTmp = 0;
+        int rc = RTJsonValueQueryInteger(a_rCursor.m_hValue, &iTmp);
+        if (RT_SUCCESS(rc))
+        {
+            m_rdValue = iTmp;
+            if ((int64_t)m_rdValue == iTmp)
+                return rc;
+            return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_OUT_OF_RANGE, "value %RI64 does not fit in a double", iTmp);
+        }
+        return a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonValueQueryInteger failed with %Rrc", rc);
+    }
+
+    if (enmType == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    /* This is probably non-sense... */
+    if (enmType == RTJSONVALTYPE_TRUE)
+        m_rdValue = 1.0;
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_DOUBLE, "wrong JSON type %s for a double",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestDouble::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+    {
+        /* Just a simple approximation here. */
+        /** @todo Not 100% sure printf %g produces the right result for JSON floating point, but it'll have to do for now... */
+        char szValue[128];
+#ifdef _MSC_VER
+        _snprintf(szValue, sizeof(szValue), "%.18g", m_rdValue);
+#else
+        snprintf(szValue, sizeof(szValue), "%.18g", m_rdValue);
+#endif
+        size_t cchValue = strlen(szValue);
+        while (cchValue > 0 && szValue[cchValue - 1] == '0')
+            cchValue--;
+        szValue[cchValue] = '\0';
+
+        if (!(a_fFlags & kToString_Append))
+            return a_pDst->assignNoThrow(szValue, cchValue);
+        return a_pDst->appendNoThrow(szValue, cchValue);
+    }
+
+    if (!(a_fFlags & kToString_Append))
+        return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+    return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+}
+
+
+int RTCRestDouble::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                              uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_fFlags);
+
+    if (a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+    {
+        m_rdValue = 0.0;
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    m_fNullIndicator = false;
+
+    const char *pszValue = RTStrStripL(a_rValue.c_str());
+    errno = 0;
+    char *pszNext = NULL;
+    m_rdValue = strtod(pszValue, &pszNext);
+    if (errno == 0 && pszNext != pszValue)
+    {
+        if (!pszNext || *pszNext == '\0')
+            return VINF_SUCCESS;
+
+        while (RT_C_IS_SPACE(*pszNext))
+            pszNext++;
+        if (*pszNext == '\0')
+            return VINF_SUCCESS;
+
+        return RTErrInfoSetF(a_pErrInfo, VERR_TRAILING_CHARS, "%s: error VERR_TRAILING_CHARS parsing '%s' as double",
+                             a_pszName, a_rValue.c_str());
+    }
+
+    if (!RT_C_IS_DIGIT(*pszValue) && *pszValue != '.')
+        return RTErrInfoSetF(a_pErrInfo, VERR_NO_DIGITS, "%s: error VERR_NO_DIGITS parsing '%s' as double",
+                             a_pszName, a_rValue.c_str());
+    int rc = RTErrConvertFromErrno(errno);
+    return RTErrInfoSetF(a_pErrInfo, rc, "%s: error %Rrc parsing '%s' as double", a_pszName, rc, a_rValue.c_str());
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestDouble::typeClass() const RT_NOEXCEPT
+{
+    return kTypeClass_Double;
+}
+
+
+const char *RTCRestDouble::typeName() const RT_NOEXCEPT
+{
+    return "double";
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestString implementation                                                                                                 *
+*********************************************************************************************************************************/
+
+/** Factory method. */
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestString::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestString();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestString::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+/** Default constructor. */
+RTCRestString::RTCRestString() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , RTCString()
+{
+}
+
+
+/** Copy constructor. */
+RTCRestString::RTCRestString(RTCRestString const &a_rThat)
+    : RTCRestObjectBase(a_rThat)
+    , RTCString(a_rThat)
+{
+}
+
+
+/** From value constructor. */
+RTCRestString::RTCRestString(RTCString const &a_rThat)
+    : RTCString(a_rThat)
+{
+}
+
+
+/** From value constructor. */
+RTCRestString::RTCRestString(const char *a_pszSrc)
+    : RTCRestObjectBase()
+    , RTCString(a_pszSrc)
+{
+}
+
+
+/** Destructor. */
+RTCRestString::~RTCRestString()
+{
+    /* nothing to do */
+}
+
+
+int RTCRestString::assignCopy(RTCRestString const &a_rThat) RT_NOEXCEPT
+{
+    int rc = assignNoThrow(a_rThat);
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    return rc;
+}
+
+
+int RTCRestString::assignCopy(RTCString const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return assignNoThrow(a_rThat);
+}
+
+
+int RTCRestString::assignCopy(const char *a_pszThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return assignNoThrow(a_pszThat);
+}
+
+
+int RTCRestString::setNull() RT_NOEXCEPT
+{
+    RTCString::setNull();
+    m_fNullIndicator = true;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestObjectBase *RTCRestString::baseClone() const RT_NOEXCEPT
+{
+    RTCRestString *pClone = new (std::nothrow) RTCRestString();
+    if (pClone)
+    {
+        int rc = pClone->assignCopy(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestString::resetToDefault() RT_NOEXCEPT
+{
+    RTCString::setNull();
+    m_fNullIndicator = false;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestString::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+        a_rDst.printf("%RMjs", m_psz ? m_psz : "");
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestString::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    if (enmType == RTJSONVALTYPE_STRING)
+    {
+        const char  *pszValue = RTJsonValueGetString(a_rCursor.m_hValue);
+        const size_t cchValue = strlen(pszValue);
+        int rc = assignNoThrow(pszValue, cchValue);
+        if (RT_SUCCESS(rc))
+            return VINF_SUCCESS;
+        return a_rCursor.m_pPrimary->addError(a_rCursor, rc, "no memory for %zu char long string", cchValue);
+    }
+
+    RTCString::setNull();
+
+    if (enmType == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_STRING, "wrong JSON type %s for string",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestString::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    /* Note! m_fNullIndicator == true: empty string. */
+    if (!(a_fFlags & kToString_Append))
+        return a_pDst->assignNoThrow(*this);
+    return a_pDst->appendNoThrow(*this);
+}
+
+
+int RTCRestString::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                              uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    RT_NOREF(a_fFlags); RT_NOREF(a_pszName); RT_NOREF(a_pErrInfo);
+
+    /* Note! Unable to set m_fNullIndicator = true here. */
+    m_fNullIndicator = false;
+    return assignNoThrow(a_rValue);
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestString::typeClass() const RT_NOEXCEPT
+{
+    return kTypeClass_String;
+}
+
+
+const char *RTCRestString::typeName() const RT_NOEXCEPT
+{
+    return "RTCString";
+}
+
+
+int RTCRestString::assignNoThrow(const RTCString &a_rSrc) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return RTCString::assignNoThrow(a_rSrc);
+}
+
+
+int RTCRestString::assignNoThrow(const char *a_pszSrc) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return RTCString::assignNoThrow(a_pszSrc);
+}
+
+
+int RTCRestString::assignNoThrow(const RTCString &a_rSrc, size_t a_offSrc, size_t a_cchSrc /*= npos*/) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return RTCString::assignNoThrow(a_rSrc, a_offSrc, a_cchSrc);
+}
+
+
+int RTCRestString::assignNoThrow(const char *a_pszSrc, size_t a_cchSrc) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return RTCString::assignNoThrow(a_pszSrc, a_cchSrc);
+}
+
+
+int RTCRestString::assignNoThrow(size_t a_cTimes, char a_ch) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return RTCString::assignNoThrow(a_cTimes, a_ch);
+}
+
+
+int RTCRestString::printfNoThrow(const char *pszFormat, ...) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    va_list va;
+    va_start(va, pszFormat);
+    int rc = RTCString::printfVNoThrow(pszFormat, va);
+    va_end(va);
+    return rc;
+}
+
+
+int RTCRestString::printfVNoThrow(const char *pszFormat, va_list va) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    return RTCString::printfVNoThrow(pszFormat, va);
+}
+
+
+RTCRestString &RTCRestString::operator=(const char *a_pcsz)
+{
+    m_fNullIndicator = false;
+    RTCString::operator=(a_pcsz);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::operator=(const RTCString &a_rThat)
+{
+    m_fNullIndicator = false;
+    RTCString::operator=(a_rThat);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::operator=(const RTCRestString &a_rThat)
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    RTCString::operator=(a_rThat);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::assign(const RTCString &a_rSrc)
+{
+    m_fNullIndicator = false;
+    RTCString::assign(a_rSrc);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::assign(const char *a_pszSrc)
+{
+    m_fNullIndicator = false;
+    RTCString::assign(a_pszSrc);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::assign(const RTCString &a_rSrc, size_t a_offSrc, size_t a_cchSrc /*= npos*/)
+{
+    m_fNullIndicator = false;
+    RTCString::assign(a_rSrc, a_offSrc, a_cchSrc);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::assign(const char *a_pszSrc, size_t a_cchSrc)
+{
+    m_fNullIndicator = false;
+    RTCString::assign(a_pszSrc, a_cchSrc);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::assign(size_t a_cTimes, char a_ch)
+{
+    m_fNullIndicator = false;
+    RTCString::assign(a_cTimes, a_ch);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::printf(const char *pszFormat, ...)
+{
+    m_fNullIndicator = false;
+    va_list va;
+    va_start(va, pszFormat);
+    RTCString::printfV(pszFormat, va);
+    va_end(va);
+    return *this;
+}
+
+
+RTCRestString &RTCRestString::printfV(const char *pszFormat, va_list va)
+{
+    m_fNullIndicator = false;
+    RTCString::printfV(pszFormat, va);
+    return *this;
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestDate implementation                                                                                                   *
+*********************************************************************************************************************************/
+/*static*/ DECLCALLBACK(RTCRestObjectBase *) RTCRestDate::createInstance(void) RT_NOEXCEPT
+{
+    return new (std::nothrow) RTCRestDate();
+}
+
+
+/**
+ * @copydoc RTCRestObjectBase::FNDESERIALIZEINSTANCEFROMJSON
+ */
+/*static*/ DECLCALLBACK(int)
+RTCRestDate::deserializeInstanceFromJson(RTCRestJsonCursor const &a_rCursor, RTCRestObjectBase **a_ppInstance) RT_NOEXCEPT
+{
+    RTCRestObjectBase *pObj = createInstance();
+    *a_ppInstance = pObj;
+    if (pObj)
+        return pObj->deserializeFromJson(a_rCursor);
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_NO_MEMORY, "Out of memory");
+}
+
+
+RTCRestDate::RTCRestDate() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_fTimeSpecOkay(false)
+    , m_enmFormat(kFormat_Invalid)
+    , m_strFormatted()
+{
+    RTTimeSpecSetNano(&m_TimeSpec, 0);
+    RT_ZERO(m_Exploded);
+
+    /* Since we need to know the format, all date-time values default to 'null'. */
+    m_fNullIndicator = true;
+}
+
+
+RTCRestDate::RTCRestDate(RTCRestDate const &a_rThat)
+    : RTCRestObjectBase(a_rThat)
+    , m_fTimeSpecOkay(a_rThat.m_fTimeSpecOkay)
+    , m_enmFormat(a_rThat.m_enmFormat)
+    , m_strFormatted(a_rThat.m_strFormatted)
+{
+    m_TimeSpec = a_rThat.m_TimeSpec;
+    m_Exploded = a_rThat.m_Exploded;
+}
+
+
+RTCRestDate::~RTCRestDate()
+{
+    /* nothing to do */
+}
+
+
+RTCRestDate &RTCRestDate::operator=(RTCRestDate const &a_rThat)
+{
+    RTCRestObjectBase::operator=(a_rThat);
+    m_TimeSpec      = a_rThat.m_TimeSpec;
+    m_Exploded      = a_rThat.m_Exploded;
+    m_fTimeSpecOkay = a_rThat.m_fTimeSpecOkay;
+    m_enmFormat     = a_rThat.m_enmFormat;
+    m_strFormatted  = a_rThat.m_strFormatted;
+    return *this;
+}
+
+
+int RTCRestDate::assignCopy(RTCRestDate const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_TimeSpec       = a_rThat.m_TimeSpec;
+    m_Exploded       = a_rThat.m_Exploded;
+    m_fTimeSpecOkay  = a_rThat.m_fTimeSpecOkay;
+    m_enmFormat      = a_rThat.m_enmFormat;
+    return m_strFormatted.assignNoThrow(a_rThat.m_strFormatted);
+}
+
+
+RTCRestObjectBase *RTCRestDate::baseClone() const RT_NOEXCEPT
+{
+    RTCRestDate *pClone = new (std::nothrow) RTCRestDate();
+    if (pClone)
+    {
+        int rc = pClone->assignCopy(*this);
+        if (RT_SUCCESS(rc))
+            return pClone;
+        delete pClone;
+    }
+    return NULL;
+}
+
+
+int RTCRestDate::resetToDefault() RT_NOEXCEPT
+{
+    m_fNullIndicator = true;
+    RTTimeSpecSetNano(&m_TimeSpec, 0);
+    RT_ZERO(m_Exploded);
+    m_fTimeSpecOkay = false;
+    m_strFormatted.setNull();
+    /*m_enmFormat - leave as hint. */
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestDate::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (m_fNullIndicator)
+        a_rDst.nullValue();
+    else
+        a_rDst.printf("%RMjs", m_strFormatted.c_str());
+    return a_rDst;
+}
+
+
+int RTCRestDate::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    setNull();
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    if (enmType == RTJSONVALTYPE_STRING)
+    {
+        int rc = m_strFormatted.assignNoThrow(RTJsonValueGetString(a_rCursor.m_hValue));
+        AssertRCReturn(rc, rc);
+
+        m_fNullIndicator = false;
+        rc = decodeFormattedString(m_enmFormat);
+        if (RT_SUCCESS(rc))
+            return rc;
+        if (m_enmFormat != kFormat_Invalid)
+        {
+            rc = decodeFormattedString();
+            if (RT_SUCCESS(rc))
+                return rc;
+        }
+        return a_rCursor.m_pPrimary->addError(a_rCursor, VWRN_REST_UNABLE_TO_DECODE_DATE,
+                                              "Unable to decode date value: %s", m_strFormatted.c_str());
+    }
+
+    if (enmType == RTJSONVALTYPE_NULL)
+        return VINF_SUCCESS;
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_DATE, "wrong JSON type for date: %s",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestDate::toString(RTCString *a_pDst, uint32_t a_fFlags /*= 0*/) const RT_NOEXCEPT
+{
+    if (m_fNullIndicator)
+    {
+        if (a_fFlags & kToString_Append)
+            return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+        return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+    }
+    if (a_fFlags & kToString_Append)
+        return a_pDst->appendNoThrow(m_strFormatted);
+    return a_pDst->assignNoThrow(m_strFormatted);
+}
+
+
+int RTCRestDate::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                            uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    setNull();
+    if (a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+        return VINF_SUCCESS;
+
+    int rc = m_strFormatted.assignNoThrow(a_rValue);
+    AssertRCReturn(rc, rc);
+
+    m_fNullIndicator = false;
+    rc = decodeFormattedString(m_enmFormat);
+    if (RT_SUCCESS(rc))
+        return rc;
+    if (m_enmFormat != kFormat_Invalid)
+    {
+        rc = decodeFormattedString();
+        if (RT_SUCCESS(rc))
+            return rc;
+    }
+    RT_NOREF(a_fFlags);
+    return RTErrInfoSetF(a_pErrInfo, VERR_REST_UNABLE_TO_DECODE_DATE,
+                         "Unable to decode date value (%s): %s", a_pszName, m_strFormatted.c_str());
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestDate::typeClass(void) const RT_NOEXCEPT
+{
+    return kTypeClass_Date;
+}
+
+
+const char *RTCRestDate::typeName(void) const RT_NOEXCEPT
+{
+    return "RTCRestDate";
+}
+
+
+int RTCRestDate::assignValue(PCRTTIMESPEC a_pTimeSpec, kFormat a_enmFormat) RT_NOEXCEPT
+{
+    AssertPtrReturn(a_pTimeSpec, VERR_INVALID_PARAMETER);
+    AssertReturn(a_enmFormat > kFormat_Invalid && a_enmFormat < kFormat_End, VERR_INVALID_PARAMETER);
+
+    m_TimeSpec = *a_pTimeSpec;
+    return explodeAndFormat(a_enmFormat);
+}
+
+
+int RTCRestDate::assignValueRfc2822(PCRTTIMESPEC a_pTimeSpec) RT_NOEXCEPT
+{
+    AssertPtrReturn(a_pTimeSpec, VERR_INVALID_PARAMETER);
+    m_TimeSpec = *a_pTimeSpec;
+    return explodeAndFormat(kFormat_Rfc2822);
+}
+
+
+int RTCRestDate::assignValueRfc7131(PCRTTIMESPEC a_pTimeSpec) RT_NOEXCEPT
+{
+    AssertPtrReturn(a_pTimeSpec, VERR_INVALID_PARAMETER);
+    m_TimeSpec = *a_pTimeSpec;
+    return explodeAndFormat(kFormat_Rfc7131);
+}
+
+
+int RTCRestDate::assignValueRfc3339(PCRTTIMESPEC a_pTimeSpec) RT_NOEXCEPT
+{
+    AssertPtrReturn(a_pTimeSpec, VERR_INVALID_PARAMETER);
+    m_TimeSpec = *a_pTimeSpec;
+    return explodeAndFormat(kFormat_Rfc3339);
+}
+
+
+int RTCRestDate::assignNow(kFormat a_enmFormat) RT_NOEXCEPT
+{
+    RTTIMESPEC Now;
+    return assignValue(RTTimeNow(&Now), a_enmFormat);
+}
+
+
+int RTCRestDate::assignNowRfc2822() RT_NOEXCEPT
+{
+    RTTIMESPEC Now;
+    return assignValueRfc2822(RTTimeNow(&Now));
+}
+
+
+int RTCRestDate::assignNowRfc7131() RT_NOEXCEPT
+{
+    RTTIMESPEC Now;
+    return assignValueRfc7131(RTTimeNow(&Now));
+}
+
+
+int RTCRestDate::assignNowRfc3339() RT_NOEXCEPT
+{
+    RTTIMESPEC Now;
+    return assignValueRfc3339(RTTimeNow(&Now));
+}
+
+
+int RTCRestDate::setFormat(kFormat a_enmFormat) RT_NOEXCEPT
+{
+    /*
+     * If this is a null object, just set the format as a hint for upcoming deserialization.
+     */
+    if (m_fNullIndicator)
+    {
+        AssertReturn(a_enmFormat >= kFormat_Invalid && a_enmFormat < kFormat_End, VERR_INVALID_PARAMETER);
+        m_enmFormat = a_enmFormat;
+        return VINF_SUCCESS;
+    }
+
+    /*
+     * If the tiem spec is okay, just reformat the string value accordingly.
+     */
+    if (m_fTimeSpecOkay)
+    {
+        AssertReturn(a_enmFormat > kFormat_Invalid && a_enmFormat < kFormat_End, VERR_INVALID_PARAMETER);
+        if (a_enmFormat ==  m_enmFormat)
+            return VINF_SUCCESS;
+        return format(a_enmFormat);
+    }
+
+    /*
+     * Try decode
+     */
+    AssertReturn(a_enmFormat > kFormat_Invalid && a_enmFormat < kFormat_End, VERR_INVALID_PARAMETER);
+    return decodeFormattedString(a_enmFormat);
+}
+
+
+int RTCRestDate::explodeAndFormat(kFormat a_enmFormat) RT_NOEXCEPT
+{
+    RTTimeExplode(&m_Exploded, &m_TimeSpec);
+    return format(a_enmFormat);
+}
+
+
+/**
+ * Formats the m_Exploded value.
+ *
+ * Sets m_strFormatted, m_fTimeSpecOkay, and m_enmFormat, clears m_fNullIndicator.
+ *
+ * @returns VINF_SUCCESS or VERR_NO_STR_MEMORY.
+ * @param   a_enmFormat The format to use.
+ */
+int RTCRestDate::format(kFormat a_enmFormat) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    m_fTimeSpecOkay  = true;
+    m_enmFormat      = a_enmFormat;
+    int rc;
+    switch (a_enmFormat)
+    {
+        case kFormat_Rfc2822:
+        case kFormat_Rfc7131:
+            rc = m_strFormatted.reserveNoThrow(RTTIME_RFC2822_LEN);
+            AssertRCReturn(rc, rc);
+            RTTimeToRfc2822(&m_Exploded, m_strFormatted.mutableRaw(), m_strFormatted.capacity(),
+                            a_enmFormat == kFormat_Rfc7131 ? RTTIME_RFC2822_F_GMT : 0);
+            m_strFormatted.jolt();
+            return VINF_SUCCESS;
+
+        case kFormat_Rfc3339:
+        case kFormat_Rfc3339_Fraction_2:
+        case kFormat_Rfc3339_Fraction_3:
+        case kFormat_Rfc3339_Fraction_6:
+        case kFormat_Rfc3339_Fraction_9:
+            rc = m_strFormatted.reserveNoThrow(RTTIME_STR_LEN);
+            AssertRCReturn(rc, rc);
+            RTTimeToStringEx(&m_Exploded, m_strFormatted.mutableRaw(), m_strFormatted.capacity(),
+                             a_enmFormat == kFormat_Rfc3339 ? 0
+                             : a_enmFormat == kFormat_Rfc3339_Fraction_2 ? 2
+                             : a_enmFormat == kFormat_Rfc3339_Fraction_3 ? 3
+                             : a_enmFormat == kFormat_Rfc3339_Fraction_6 ? 6 : 9);
+            m_strFormatted.jolt();
+            return VINF_SUCCESS;
+
+        /* no default */
+        case kFormat_Invalid:
+        case kFormat_End:
+            break;
+    }
+    AssertFailedReturn(VERR_REST_INTERNAL_ERROR_7);
+}
+
+
+/**
+ * Internal worker that attempts to decode m_strFormatted.
+ *
+ * Sets m_fTimeSpecOkay.
+ *
+ * @returns IPRT status code.
+ * @param   enmFormat   Specific format to try, kFormat_Invalid (default) to try guess it.
+ */
+int RTCRestDate::decodeFormattedString(kFormat enmFormat /*= kFormat_Invalid*/) RT_NOEXCEPT
+{
+    /*
+     * Take empty string to mean null.
+     */
+    const char *pszTmp = RTStrStripL(m_strFormatted.c_str());
+    if (*pszTmp == '\0')
+    {
+        setNull();
+        return VINF_SUCCESS;
+    }
+
+    switch (enmFormat)
+    {
+        case kFormat_Invalid:
+        {
+            size_t cch = strlen(pszTmp);
+            if (cch >= 6)
+            {
+                if (   !RT_C_IS_DIGIT(pszTmp[0])
+                    || RT_C_IS_SPACE(pszTmp[5])
+                    || RT_C_IS_SPACE(pszTmp[2])
+                    || RT_C_IS_SPACE(pszTmp[1])
+                    || RT_C_IS_SPACE(pszTmp[3])
+                    || RT_C_IS_SPACE(pszTmp[4]))
+                    return decodeFormattedString(kFormat_Rfc2822);
+                return decodeFormattedString(kFormat_Rfc3339);
+            }
+            return VERR_REST_UNABLE_TO_DECODE_DATE;
+        }
+
+        /*
+         * Examples:
+         *      Fri, 31 Aug 2018 00:00:00 +0200
+         *      Mon, 3 Sep 2018 00:00:00 GMT
+         *      Mon, 3 Sep 2018 00:00:00 -0000
+         *      3 Sep 2018 00:00:00 -0000 (?)
+         *      3 Sep 2018 00:00:00 GMT   (?)
+         */
+        case kFormat_Rfc2822:
+        case kFormat_Rfc7131:
+            if (RTTimeFromRfc2822(&m_Exploded, pszTmp))
+            {
+                RTTimeImplode(&m_TimeSpec, &m_Exploded);
+
+                pszTmp = strchr(pszTmp, '\0');
+                if (pszTmp[-1] == 'T' || pszTmp[-1] == 't')
+                    m_enmFormat = kFormat_Rfc7131;
+                else
+                    m_enmFormat = kFormat_Rfc2822;
+                m_fTimeSpecOkay = true;
+                return VINF_SUCCESS;
+            }
+            return VERR_REST_UNABLE_TO_DECODE_DATE;
+
+        /*
+         * Examples:
+         *      2018-08-31T00:00:00+0200
+         *      2018-09-03T00:00:00Z
+         *      2018-09-03T00:00:00+0000
+         *      2018-09-03T00:00:00.123456789Z
+         */
+        case kFormat_Rfc3339:
+        case kFormat_Rfc3339_Fraction_2:
+        case kFormat_Rfc3339_Fraction_3:
+        case kFormat_Rfc3339_Fraction_6:
+        case kFormat_Rfc3339_Fraction_9:
+            if (RTTimeFromString(&m_Exploded, pszTmp))
+            {
+                RTTimeImplode(&m_TimeSpec, &m_Exploded);
+
+                pszTmp = strchr(pszTmp, '.');
+                if (!pszTmp)
+                    m_enmFormat = kFormat_Rfc3339;
+                else
+                {
+                    size_t cchFraction = 0;
+                    pszTmp++;
+                    while (RT_C_IS_DIGIT(pszTmp[cchFraction]))
+                        cchFraction++;
+                    if (cchFraction == 0)
+                        m_enmFormat = kFormat_Rfc3339;
+                    else if (cchFraction <= 2)
+                        m_enmFormat = kFormat_Rfc3339_Fraction_2;
+                    else if (cchFraction <= 3)
+                        m_enmFormat = kFormat_Rfc3339_Fraction_3;
+                    else if (cchFraction <= 6)
+                        m_enmFormat = kFormat_Rfc3339_Fraction_6;
+                    else
+                        m_enmFormat = kFormat_Rfc3339_Fraction_9;
+                }
+                m_fTimeSpecOkay = true;
+                return VINF_SUCCESS;
+            }
+            return VERR_REST_UNABLE_TO_DECODE_DATE;
+
+        /* no default */
+        case kFormat_End:
+            break;
+    }
+    AssertFailedReturn(VERR_INVALID_PARAMETER);
+}
+
+
+/*********************************************************************************************************************************
+*   RTCRestStringEnumBase implementation                                                                                         *
+*********************************************************************************************************************************/
+
+/** Default constructor. */
+RTCRestStringEnumBase::RTCRestStringEnumBase() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_iEnumValue(0 /*invalid*/)
+    , m_strValue()
+{
+}
+
+
+/** Destructor. */
+RTCRestStringEnumBase::~RTCRestStringEnumBase()
+{
+    /* nothing to do */
+}
+
+
+/** Copy constructor. */
+RTCRestStringEnumBase::RTCRestStringEnumBase(RTCRestStringEnumBase const &a_rThat)
+    : RTCRestObjectBase(a_rThat)
+    , m_iEnumValue(a_rThat.m_iEnumValue)
+    , m_strValue(a_rThat.m_strValue)
+{
+}
+
+
+/** Copy assignment operator. */
+RTCRestStringEnumBase &RTCRestStringEnumBase::operator=(RTCRestStringEnumBase const &a_rThat)
+{
+    RTCRestObjectBase::operator=(a_rThat);
+    m_iEnumValue = a_rThat.m_iEnumValue;
+    m_strValue = a_rThat.m_strValue;
+    return *this;
+}
+
+
+int RTCRestStringEnumBase::assignCopy(RTCRestStringEnumBase const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_iEnumValue = a_rThat.m_iEnumValue;
+    return m_strValue.assignNoThrow(a_rThat.m_strValue);
+}
+
+
+int RTCRestStringEnumBase::resetToDefault() RT_NOEXCEPT
+{
+    m_iEnumValue = 0; /*invalid*/
+    m_strValue.setNull();
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestStringEnumBase::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+        a_rDst.printf("%RMjs", getString());
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestStringEnumBase::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    m_iEnumValue     = 0;
+
+    RTJSONVALTYPE enmType = RTJsonValueGetType(a_rCursor.m_hValue);
+    if (enmType == RTJSONVALTYPE_STRING)
+    {
+        const char  *pszValue = RTJsonValueGetString(a_rCursor.m_hValue);
+        const size_t cchValue = strlen(pszValue);
+        int rc = setByString(pszValue, cchValue);
+        if (RT_SUCCESS(rc))
+            return rc;
+        return a_rCursor.m_pPrimary->addError(a_rCursor, rc, "no memory for %zu char long string", cchValue);
+    }
+
+    m_strValue.setNull();
+    if (enmType == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        return VINF_SUCCESS;
+    }
+
+    return a_rCursor.m_pPrimary->addError(a_rCursor, VERR_REST_WRONG_JSON_TYPE_FOR_STRING, "wrong JSON type %s for string/enum",
+                                          RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+}
+
+
+int RTCRestStringEnumBase::toString(RTCString *a_pDst, uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+    {
+        if (m_iEnumValue > 0)
+        {
+            size_t              cEntries  = 0;
+            ENUMMAPENTRY const *paEntries = getMappingTable(&cEntries);
+            AssertReturn((unsigned)(m_iEnumValue - 1) < cEntries, VERR_REST_INTERNAL_ERROR_3);
+            Assert(paEntries[m_iEnumValue - 1].iValue == m_iEnumValue);
+
+            if (a_fFlags & kToString_Append)
+                return a_pDst->appendNoThrow(paEntries[m_iEnumValue - 1].pszName, paEntries[m_iEnumValue - 1].cchName);
+            return a_pDst->assignNoThrow(paEntries[m_iEnumValue - 1].pszName, paEntries[m_iEnumValue - 1].cchName);
+        }
+        if (a_fFlags & kToString_Append)
+            return a_pDst->appendNoThrow(m_strValue);
+        return a_pDst->assignNoThrow(m_strValue);
+    }
+    if (a_fFlags & kToString_Append)
+        return a_pDst->appendNoThrow(RT_STR_TUPLE("null"));
+    return a_pDst->assignNoThrow(RT_STR_TUPLE("null"));
+}
+
+
+int RTCRestStringEnumBase::fromString(RTCString const &a_rValue, const char *a_pszName, PRTERRINFO a_pErrInfo /*= NULL*/,
+                                      uint32_t a_fFlags /*= kCollectionFormat_Unspecified*/) RT_NOEXCEPT
+{
+    int iEnumValue = stringToEnum(a_rValue);
+    if (iEnumValue > 0)
+    {
+        m_iEnumValue = iEnumValue;
+        m_strValue.setNull();
+        return VINF_SUCCESS;
+    }
+
+    /* No translation.  Check for null... */
+    m_iEnumValue = 0;
+    if (a_rValue.startsWithWord("null", RTCString::CaseInsensitive))
+    {
+        m_strValue.setNull();
+        setNull();
+        return VINF_SUCCESS;
+    }
+
+    /* Try copy the string. */
+    int rc = m_strValue.assignNoThrow(a_rValue);
+    if (RT_SUCCESS(rc))
+        return VWRN_NOT_FOUND;
+
+    RT_NOREF(a_pszName, a_pErrInfo, a_fFlags);
+    return rc;
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestStringEnumBase::typeClass(void) const RT_NOEXCEPT
+{
+    return kTypeClass_StringEnum;
+}
+
+
+int RTCRestStringEnumBase::setByString(const char *a_pszValue, size_t a_cchValue /*= RTSTR_MAX*/) RT_NOEXCEPT
+{
+    if (a_cchValue == RTSTR_MAX)
+        a_cchValue = strlen(a_pszValue);
+    int iEnumValue = stringToEnum(a_pszValue, a_cchValue);
+    if (iEnumValue > 0)
+    {
+        m_iEnumValue = iEnumValue;
+        m_strValue.setNull();
+        return VINF_SUCCESS;
+    }
+
+    /* No translation. */
+    m_iEnumValue = 0;
+    int rc = m_strValue.assignNoThrow(a_pszValue, a_cchValue);
+    if (RT_SUCCESS(rc))
+        return VWRN_NOT_FOUND;
+    return rc;
+}
+
+
+int RTCRestStringEnumBase::setByString(RTCString const &a_rValue) RT_NOEXCEPT
+{
+    return setByString(a_rValue.c_str(), a_rValue.length());
+}
+
+
+const char *RTCRestStringEnumBase::getString() const RT_NOEXCEPT
+{
+    /* We ASSUME a certain mapping table layout here.  */
+    if (m_iEnumValue > 0)
+    {
+        size_t              cEntries  = 0;
+        ENUMMAPENTRY const *paEntries = getMappingTable(&cEntries);
+        AssertReturn((unsigned)(m_iEnumValue - 1) < cEntries, "<internal-error-#1>");
+        Assert(paEntries[m_iEnumValue - 1].iValue == m_iEnumValue);
+        return paEntries[m_iEnumValue - 1].pszName;
+    }
+
+    AssertReturn(m_iEnumValue == 0, "<internal-error-#2>");
+    if (m_strValue.isEmpty())
+        return "invalid";
+
+    return m_strValue.c_str();
+}
+
+
+int RTCRestStringEnumBase::stringToEnum(const char *a_pszValue, size_t a_cchValue) RT_NOEXCEPT
+{
+    if (a_cchValue == RTSTR_MAX)
+        a_cchValue = strlen(a_pszValue);
+
+    size_t              cEntries  = 0;
+    ENUMMAPENTRY const *paEntries = getMappingTable(&cEntries);
+    for (size_t i = 0; i < cEntries; i++)
+        if (   paEntries[i].cchName == a_cchValue
+            && memcmp(paEntries[i].pszName, a_pszValue, a_cchValue) == 0)
+            return paEntries[i].iValue;
+    return 0;
+}
+
+
+int RTCRestStringEnumBase::stringToEnum(RTCString const &a_rStrValue) RT_NOEXCEPT
+{
+    return stringToEnum(a_rStrValue.c_str(), a_rStrValue.length());
+}
+
+
+const char *RTCRestStringEnumBase::enumToString(int a_iEnumValue, size_t *a_pcchString) RT_NOEXCEPT
+{
+    /* We ASSUME a certain mapping table layout here.  */
+    if (a_iEnumValue > 0)
+    {
+        size_t              cEntries  = 0;
+        ENUMMAPENTRY const *paEntries = getMappingTable(&cEntries);
+        if ((unsigned)(a_iEnumValue - 1) < cEntries)
+        {
+            Assert(paEntries[a_iEnumValue - 1].iValue == a_iEnumValue);
+            if (a_pcchString)
+                *a_pcchString = paEntries[a_iEnumValue - 1].cchName;
+            return paEntries[a_iEnumValue - 1].pszName;
+        }
+    }
+    /* Zero is the special invalid value. */
+    else if (a_iEnumValue == 0)
+    {
+        if (a_pcchString)
+            *a_pcchString = 7;
+        return "invalid";
+    }
+    return NULL;
+}
+
+
+bool RTCRestStringEnumBase::setWorker(int a_iEnumValue) RT_NOEXCEPT
+{
+    /* We ASSUME a certain mapping table layout here.  */
+    if (a_iEnumValue > 0)
+    {
+        size_t              cEntries  = 0;
+        ENUMMAPENTRY const *paEntries = getMappingTable(&cEntries);
+        AssertReturn((unsigned)(a_iEnumValue - 1) < cEntries, false);
+        Assert(paEntries[a_iEnumValue - 1].iValue == a_iEnumValue);
+        RT_NOREF(paEntries);
+    }
+    /* Zero is the special invalid value. */
+    else if (a_iEnumValue != 0)
+        AssertFailedReturn(false);
+
+    m_iEnumValue = a_iEnumValue;
+    m_strValue.setNull();
+    return true;
+}
+
+
+RTCRestObjectBase  *RTCRestStringEnumBase::cloneWorker(RTCRestStringEnumBase *a_pDst) const RT_NOEXCEPT
+{
+    if (a_pDst)
+    {
+        int rc = a_pDst->assignCopy(*this);
+        if (RT_SUCCESS(rc))
+            return a_pDst;
+        delete a_pDst;
+    }
+    return NULL;
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestDataObject                                                                                                            *
+*********************************************************************************************************************************/
+
+RTCRestDataObject::RTCRestDataObject() RT_NOEXCEPT
+    : RTCRestObjectBase()
+    , m_fIsSet(0)
+{
+}
+
+
+RTCRestDataObject::~RTCRestDataObject()
+{
+}
+
+
+RTCRestDataObject::RTCRestDataObject(RTCRestDataObject const &a_rThat) RT_NOEXCEPT
+    : RTCRestObjectBase(a_rThat)
+    , m_fIsSet(a_rThat.m_fIsSet)
+{
+}
+
+
+RTCRestDataObject &RTCRestDataObject::operator=(RTCRestDataObject const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_fIsSet = a_rThat.m_fIsSet;
+    return *this;
+}
+
+
+int RTCRestDataObject::assignCopy(RTCRestDataObject const &a_rThat) RT_NOEXCEPT
+{
+    m_fNullIndicator = a_rThat.m_fNullIndicator;
+    m_fIsSet = a_rThat.m_fIsSet;
+    return VINF_SUCCESS;
+}
+
+
+int RTCRestDataObject::resetToDefault() RT_NOEXCEPT
+{
+    m_fNullIndicator = false;
+    m_fIsSet = 0;
+    return VINF_SUCCESS;
+}
+
+
+RTCRestOutputBase &RTCRestDataObject::serializeMembersAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    RT_NOREF(a_rDst);
+    return a_rDst;
+}
+
+
+RTCRestOutputBase &RTCRestDataObject::serializeAsJson(RTCRestOutputBase &a_rDst) const RT_NOEXCEPT
+{
+    if (!m_fNullIndicator)
+    {
+        uint32_t const uOldState = a_rDst.beginObject();
+        serializeMembersAsJson(a_rDst);
+        a_rDst.endObject(uOldState);
+    }
+    else
+        a_rDst.nullValue();
+    return a_rDst;
+}
+
+
+int RTCRestDataObject::deserializeMemberFromJson(RTCRestJsonCursor const &a_rCursor, size_t a_cchName) RT_NOEXCEPT
+{
+    RT_NOREF(a_rCursor, a_cchName);
+    return VERR_NOT_FOUND;
+}
+
+
+int RTCRestDataObject::deserializeFromJson(RTCRestJsonCursor const &a_rCursor) RT_NOEXCEPT
+{
+    if (RTJsonValueGetType(a_rCursor.m_hValue) == RTJSONVALTYPE_NULL)
+    {
+        setNull();
+        return VINF_SUCCESS;
+    }
+
+    /*
+     * Make sure the object starts out with default values.
+     */
+    if (m_fIsSet == 0)
+        m_fNullIndicator = false;
+    else
+        resetToDefault();
+
+    /*
+     * Iterate the object values.
+     */
+    RTJSONIT hIterator;
+    int rcRet = RTJsonIteratorBeginObject(a_rCursor.m_hValue, &hIterator);
+    if (RT_SUCCESS(rcRet))
+    {
+        for (;;)
+        {
+            RTCRestJsonCursor SubCursor(a_rCursor);
+            int rc = RTJsonIteratorQueryValue(hIterator, &SubCursor.m_hValue, &SubCursor.m_pszName);
+            if (RT_SUCCESS(rc))
+            {
+                size_t const cchName = strlen(SubCursor.m_pszName);
+
+                rc = deserializeMemberFromJson(SubCursor, cchName);
+                if (rc == VINF_SUCCESS)
+                { /* likely */ }
+                else if (rc == VERR_NOT_FOUND)
+                {
+                    rc = SubCursor.m_pPrimary->unknownField(SubCursor);
+                    if (rcRet == VINF_SUCCESS)
+                        rcRet = rc;
+                }
+                else if (RT_SUCCESS(rc))
+                {
+                    if (rcRet == VINF_SUCCESS)
+                        rcRet = rc;
+                }
+                else if (RT_SUCCESS(rcRet))
+                    rcRet = rc;
+            }
+            else
+                rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonIteratorQueryValue failed: %Rrc", rc);
+
+            /*
+             * Advance.
+             */
+            rc = RTJsonIteratorNext(hIterator);
+            if (RT_SUCCESS(rc))
+            { /* likely */ }
+            else if (rc == VERR_JSON_ITERATOR_END)
+                break;
+            else
+            {
+                rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rc, "RTJsonIteratorNext failed: %Rrc", rc);
+                break;
+            }
+        }
+
+        RTJsonIteratorFree(hIterator);
+    }
+    else if (   rcRet == VERR_JSON_VALUE_INVALID_TYPE
+             && RTJsonValueGetType(a_rCursor.m_hValue) == RTJSONVALTYPE_NULL)
+    {
+        m_fNullIndicator = true;
+        rcRet = VINF_SUCCESS;
+    }
+    else
+        rcRet = a_rCursor.m_pPrimary->addError(a_rCursor, rcRet, "RTJsonIteratorBeginObject failed: %Rrc (type %s)",
+                                               rcRet, RTJsonValueTypeName(RTJsonValueGetType(a_rCursor.m_hValue)));
+    return rcRet;
+}
+
+
+RTCRestObjectBase::kTypeClass RTCRestDataObject::typeClass(void) const RT_NOEXCEPT
+{
+    return kTypeClass_DataObject;
+}
+
+
+
+/*********************************************************************************************************************************
+*   RTCRestPolyDataObject                                                                                                        *
+*********************************************************************************************************************************/
+
+RTCRestPolyDataObject::RTCRestPolyDataObject() RT_NOEXCEPT
+    : RTCRestDataObject()
+{
+}
+
+
+RTCRestPolyDataObject::RTCRestPolyDataObject(RTCRestPolyDataObject const &a_rThat) RT_NOEXCEPT
+    : RTCRestDataObject(a_rThat)
+{
+}
+
+
+RTCRestPolyDataObject::~RTCRestPolyDataObject()
+{
+}
+
+
+int RTCRestPolyDataObject::resetToDefault() RT_NOEXCEPT
+{
+    return RTCRestDataObject::resetToDefault();
+}
+
+
+bool RTCRestPolyDataObject::isChild() const RT_NOEXCEPT
+{
+    return false;
+}
+
+
+RTCRestPolyDataObject &RTCRestPolyDataObject::operator=(RTCRestPolyDataObject const &a_rThat) RT_NOEXCEPT
+{
+    RTCRestDataObject::operator=(a_rThat);
+    return *this;
+}
+