Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

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

1 files changed, 3292 insertions, 0 deletions

diff --git a/ucb/source/ucp/webdav/webdavcontent.cxx b/ucb/source/ucp/webdav/webdavcontent.cxx
new file mode 100644
index 000000000..6c0198199
--- /dev/null
+++ b/ucb/source/ucp/webdav/webdavcontent.cxx
@@ -0,0 +1,3292 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <memory>
+
+#include <cppuhelper/queryinterface.hxx>
+#include <rtl/uri.hxx>
+#include <sal/log.hxx>
+#include <ucbhelper/contentidentifier.hxx>
+#include <ucbhelper/macros.hxx>
+#include <ucbhelper/propertyvalueset.hxx>
+#include <ucbhelper/simpleinteractionrequest.hxx>
+#include <ucbhelper/cancelcommandexecution.hxx>
+
+#include <com/sun/star/beans/IllegalTypeException.hpp>
+#include <com/sun/star/beans/NotRemoveableException.hpp>
+#include <com/sun/star/beans/PropertyAttribute.hpp>
+#include <com/sun/star/beans/PropertyExistException.hpp>
+#include <com/sun/star/beans/PropertySetInfoChange.hpp>
+#include <com/sun/star/beans/PropertySetInfoChangeEvent.hpp>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/io/XActiveDataSink.hpp>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/lang/IllegalAccessException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/sdbc/SQLException.hpp>
+#include <com/sun/star/task/PasswordContainerInteractionHandler.hpp>
+#include <com/sun/star/ucb/CommandEnvironment.hpp>
+#include <com/sun/star/ucb/CommandFailedException.hpp>
+#include <com/sun/star/ucb/ContentInfoAttribute.hpp>
+#include <com/sun/star/ucb/IllegalIdentifierException.hpp>
+#include <com/sun/star/ucb/InsertCommandArgument.hpp>
+#include <com/sun/star/ucb/InteractiveBadTransferURLException.hpp>
+#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
+#include <com/sun/star/ucb/InteractiveLockingLockedException.hpp>
+#include <com/sun/star/ucb/InteractiveLockingLockExpiredException.hpp>
+#include <com/sun/star/ucb/InteractiveLockingNotLockedException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkConnectException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkGeneralException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkReadException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkResolveNameException.hpp>
+#include <com/sun/star/ucb/InteractiveNetworkWriteException.hpp>
+#include <com/sun/star/ucb/MissingInputStreamException.hpp>
+#include <com/sun/star/ucb/MissingPropertiesException.hpp>
+#include <com/sun/star/ucb/NameClash.hpp>
+#include <com/sun/star/ucb/NameClashException.hpp>
+#include <com/sun/star/ucb/OpenCommandArgument2.hpp>
+#include <com/sun/star/ucb/OpenMode.hpp>
+#include <com/sun/star/ucb/PostCommandArgument2.hpp>
+#include <com/sun/star/ucb/PropertyCommandArgument.hpp>
+#include <com/sun/star/ucb/TransferInfo.hpp>
+#include <com/sun/star/ucb/UnsupportedCommandException.hpp>
+#include <com/sun/star/ucb/UnsupportedDataSinkException.hpp>
+#include <com/sun/star/ucb/UnsupportedNameClashException.hpp>
+#include <com/sun/star/ucb/UnsupportedOpenModeException.hpp>
+#include <com/sun/star/ucb/XCommandInfo.hpp>
+#include <com/sun/star/ucb/XPersistentPropertySet.hpp>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include "webdavcontent.hxx"
+#include "webdavprovider.hxx"
+#include "webdavresultset.hxx"
+#include "ContentProperties.hxx"
+#include "SerfUri.hxx"
+#include "UCBDeadPropertyValue.hxx"
+#include "DAVException.hxx"
+#include "DAVProperties.hxx"
+
+using namespace com::sun::star;
+using namespace http_dav_ucp;
+
+namespace
+{
+void lcl_sendPartialGETRequest( bool &bError,
+                                DAVException &aLastException,
+                                const std::vector< OUString >& rProps,
+                                std::vector< OUString > &aHeaderNames,
+                                const std::unique_ptr< DAVResourceAccess > &xResAccess,
+                                std::unique_ptr< ContentProperties > &xProps,
+                                const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+    DAVResource aResource;
+    DAVRequestHeaders aPartialGet;
+    aPartialGet.push_back(
+        DAVRequestHeader(
+            OUString( "Range" ),
+            OUString( "bytes=0-0" )));
+
+    bool bIsRequestSize = std::any_of(aHeaderNames.begin(), aHeaderNames.end(),
+        [](const OUString& rHeaderName) { return rHeaderName == "Content-Length"; });
+
+    if ( bIsRequestSize )
+    {
+        // we need to know if the server accepts range requests for a resource
+        // and the range unit it uses
+        aHeaderNames.push_back( OUString( "Accept-Ranges" ) );
+        aHeaderNames.push_back( OUString( "Content-Range" ) );
+    }
+    try
+    {
+        uno::Reference< io::XInputStream > xIn = xResAccess->GET( aPartialGet,
+                                                                  aHeaderNames,
+                                                                  aResource,
+                                                                  xEnv );
+        bError = false;
+
+        if ( bIsRequestSize )
+        {
+            // the ContentProperties maps "Content-Length" to the UCB "Size" property
+            // This would have an unrealistic value of 1 byte because we did only a partial GET
+            // Solution: if "Content-Range" is present, map it with UCB "Size" property
+            OUString aAcceptRanges, aContentRange, aContentLength;
+            std::vector< DAVPropertyValue > &aResponseProps = aResource.properties;
+            for ( const auto& rResponseProp : aResponseProps )
+            {
+                if ( rResponseProp.Name == "Accept-Ranges" )
+                    rResponseProp.Value >>= aAcceptRanges;
+                else if ( rResponseProp.Name == "Content-Range" )
+                    rResponseProp.Value >>= aContentRange;
+                else if ( rResponseProp.Name == "Content-Length" )
+                    rResponseProp.Value >>= aContentLength;
+            }
+
+            sal_Int64 nSize = 1;
+            if ( aContentLength.getLength() )
+            {
+                nSize = aContentLength.toInt64();
+            }
+
+            // according to http://tools.ietf.org/html/rfc2616#section-3.12
+            // the only range unit defined is "bytes" and implementations
+            // MAY ignore ranges specified using other units.
+            if ( nSize == 1 &&
+                    aContentRange.getLength() &&
+                    aAcceptRanges == "bytes" )
+            {
+                // Parse the Content-Range to get the size
+                // vid. http://tools.ietf.org/html/rfc2616#section-14.16
+                // Content-Range: <range unit> <bytes range>/<size>
+                sal_Int32 nSlash = aContentRange.lastIndexOf( '/' );
+                if ( nSlash != -1 )
+                {
+                    OUString aSize = aContentRange.copy( nSlash + 1 );
+                    // "*" means that the instance-length is unknown at the time when the response was generated
+                    if ( aSize != "*" )
+                    {
+                        auto it = std::find_if(aResponseProps.begin(), aResponseProps.end(),
+                            [](const DAVPropertyValue& rProp) { return rProp.Name == "Content-Length"; });
+                        if (it != aResponseProps.end())
+                        {
+                            it->Value <<= aSize;
+                        }
+                    }
+                }
+            }
+        }
+
+        if ( xProps.get() )
+            xProps->addProperties(
+                rProps,
+                ContentProperties( aResource ) );
+        else
+            xProps.reset ( new ContentProperties( aResource ) );
+    }
+    catch ( DAVException const & ex )
+    {
+        aLastException = ex;
+    }
+}
+}
+
+
+// Content Implementation.
+
+
+// ctr for content on an existing webdav resource
+Content::Content(
+          const uno::Reference< uno::XComponentContext >& rxContext,
+          ContentProvider* pProvider,
+          const uno::Reference< ucb::XContentIdentifier >& Identifier,
+          rtl::Reference< DAVSessionFactory > const & rSessionFactory )
+: ContentImplHelper( rxContext, pProvider, Identifier ),
+  m_eResourceType( UNKNOWN ),
+  m_pProvider( pProvider ),
+  m_bTransient( false ),
+  m_bLocked( false ),
+  m_bCollection( false ),
+  m_bDidGetOrHead( false )
+{
+    try
+    {
+        m_xResAccess.reset( new DAVResourceAccess(
+                rxContext,
+                rSessionFactory,
+                Identifier->getContentIdentifier() ) );
+
+        SerfUri aURI( Identifier->getContentIdentifier() );
+        m_aEscapedTitle = aURI.GetPathBaseName();
+    }
+    catch ( DAVException const & )
+    {
+        throw ucb::ContentCreationException();
+    }
+}
+
+
+// ctr for content on a non-existing webdav resource
+Content::Content(
+            const uno::Reference< uno::XComponentContext >& rxContext,
+            ContentProvider* pProvider,
+            const uno::Reference< ucb::XContentIdentifier >& Identifier,
+            rtl::Reference< DAVSessionFactory > const & rSessionFactory,
+            bool isCollection )
+: ContentImplHelper( rxContext, pProvider, Identifier ),
+  m_eResourceType( UNKNOWN ),
+  m_pProvider( pProvider ),
+  m_bTransient( true ),
+  m_bLocked( false ),
+  m_bCollection( isCollection ),
+  m_bDidGetOrHead( false )
+{
+    try
+    {
+        m_xResAccess.reset( new DAVResourceAccess(
+            rxContext, rSessionFactory, Identifier->getContentIdentifier() ) );
+    }
+    catch ( DAVException const & )
+    {
+        throw ucb::ContentCreationException();
+    }
+
+    // Do not set m_aEscapedTitle here! Content::insert relays on this!!!
+}
+
+
+// virtual
+Content::~Content()
+{
+    if (m_bLocked)
+        unlock(uno::Reference< ucb::XCommandEnvironment >());
+}
+
+
+// XInterface methods.
+
+
+// virtual
+void SAL_CALL Content::acquire()
+    throw( )
+{
+    ContentImplHelper::acquire();
+}
+
+
+// virtual
+void SAL_CALL Content::release()
+    throw( )
+{
+    ContentImplHelper::release();
+}
+
+
+// virtual
+uno::Any SAL_CALL Content::queryInterface( const uno::Type & rType )
+{
+    // Note: isFolder may require network activities! So call it only
+    //       if it is really necessary!!!
+    uno::Any aRet = cppu::queryInterface(
+        rType,
+        static_cast< ucb::XContentCreator * >( this ) );
+    if ( aRet.hasValue() )
+    {
+        try
+        {
+            uno::Reference< beans::XPropertySet > const xProps(
+                m_xContext, uno::UNO_QUERY_THROW );
+            uno::Reference< uno::XComponentContext > xCtx;
+            xCtx.set( xProps->getPropertyValue( "DefaultContext" ),
+                uno::UNO_QUERY_THROW );
+
+            uno::Reference< task::XInteractionHandler > xIH(
+                task::PasswordContainerInteractionHandler::create( xCtx ) );
+
+            // Supply a command env to isFolder() that contains an interaction
+            // handler that uses the password container service to obtain
+            // credentials without displaying a password gui.
+
+            uno::Reference< ucb::XCommandEnvironment > xCmdEnv(
+                ucb::CommandEnvironment::create(
+                   xCtx,
+                   xIH,
+                   uno::Reference< ucb::XProgressHandler >() ) );
+
+            return isFolder( xCmdEnv ) ? aRet : uno::Any();
+        }
+        catch ( uno::RuntimeException const & )
+        {
+            throw;
+        }
+        catch ( uno::Exception const & )
+        {
+            return uno::Any();
+        }
+    }
+    return aRet.hasValue() ? aRet : ContentImplHelper::queryInterface( rType );
+}
+
+
+// XTypeProvider methods.
+
+
+XTYPEPROVIDER_COMMON_IMPL( Content );
+
+
+// virtual
+uno::Sequence< uno::Type > SAL_CALL Content::getTypes()
+{
+    bool bFolder = false;
+    try
+    {
+        bFolder
+            = isFolder( uno::Reference< ucb::XCommandEnvironment >() );
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( uno::Exception const & )
+    {
+    }
+
+    if ( bFolder )
+    {
+        static cppu::OTypeCollection s_aFolderTypes(
+                        CPPU_TYPE_REF( lang::XTypeProvider ),
+                        CPPU_TYPE_REF( lang::XServiceInfo ),
+                        CPPU_TYPE_REF( lang::XComponent ),
+                        CPPU_TYPE_REF( ucb::XContent ),
+                        CPPU_TYPE_REF( ucb::XCommandProcessor ),
+                        CPPU_TYPE_REF( beans::XPropertiesChangeNotifier ),
+                        CPPU_TYPE_REF( ucb::XCommandInfoChangeNotifier ),
+                        CPPU_TYPE_REF( beans::XPropertyContainer ),
+                        CPPU_TYPE_REF( beans::XPropertySetInfoChangeNotifier ),
+                        CPPU_TYPE_REF( container::XChild ),
+                        CPPU_TYPE_REF( ucb::XContentCreator ) );
+
+        return s_aFolderTypes.getTypes();
+    }
+    else
+    {
+        static cppu::OTypeCollection s_aDocumentTypes(
+                        CPPU_TYPE_REF( lang::XTypeProvider ),
+                        CPPU_TYPE_REF( lang::XServiceInfo ),
+                        CPPU_TYPE_REF( lang::XComponent ),
+                        CPPU_TYPE_REF( ucb::XContent ),
+                        CPPU_TYPE_REF( ucb::XCommandProcessor ),
+                        CPPU_TYPE_REF( beans::XPropertiesChangeNotifier ),
+                        CPPU_TYPE_REF( ucb::XCommandInfoChangeNotifier ),
+                        CPPU_TYPE_REF( beans::XPropertyContainer ),
+                        CPPU_TYPE_REF( beans::XPropertySetInfoChangeNotifier ),
+                        CPPU_TYPE_REF( container::XChild ) );
+
+        return  s_aDocumentTypes.getTypes();
+    }
+}
+
+
+// XServiceInfo methods.
+
+
+// virtual
+OUString SAL_CALL Content::getImplementationName()
+{
+    return "com.sun.star.comp.ucb.WebDAVContent";
+}
+
+
+// virtual
+uno::Sequence< OUString > SAL_CALL Content::getSupportedServiceNames()
+{
+    uno::Sequence<OUString> aSNS { WEBDAV_CONTENT_SERVICE_NAME };
+    return aSNS;
+}
+
+
+// XContent methods.
+
+
+// virtual
+OUString SAL_CALL Content::getContentType()
+{
+    bool bFolder = false;
+    try
+    {
+        bFolder
+            = isFolder( uno::Reference< ucb::XCommandEnvironment >() );
+    }
+    catch ( uno::RuntimeException const & )
+    {
+        throw;
+    }
+    catch ( uno::Exception const & )
+    {
+    }
+
+    if ( bFolder )
+        return WEBDAV_COLLECTION_TYPE;
+
+    return WEBDAV_CONTENT_TYPE;
+}
+
+
+// XCommandProcessor methods.
+
+
+// virtual
+uno::Any SAL_CALL Content::execute(
+        const ucb::Command& aCommand,
+        sal_Int32 /*CommandId*/,
+        const uno::Reference< ucb::XCommandEnvironment >& Environment )
+{
+    SAL_INFO("ucb.ucp.webdav",  ">>>>> Content::execute: start: command: " << aCommand.Name
+            << ", env: " << (Environment.is() ? "present" : "missing") );
+
+    uno::Any aRet;
+
+    if ( aCommand.Name == "getPropertyValues" )
+    {
+
+        // getPropertyValues
+
+
+        uno::Sequence< beans::Property > Properties;
+        if ( !( aCommand.Argument >>= Properties ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= getPropertyValues( Properties, Environment );
+    }
+    else if ( aCommand.Name == "setPropertyValues" )
+    {
+
+        // setPropertyValues
+
+
+        uno::Sequence< beans::PropertyValue > aProperties;
+        if ( !( aCommand.Argument >>= aProperties ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        if ( !aProperties.getLength() )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "No properties!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= setPropertyValues( aProperties, Environment );
+    }
+    else if ( aCommand.Name == "getPropertySetInfo" )
+    {
+
+        // getPropertySetInfo
+
+
+        // Note: Implemented by base class.
+        aRet <<= getPropertySetInfo( Environment,
+                                     false /* don't cache data */ );
+    }
+    else if ( aCommand.Name == "getCommandInfo" )
+    {
+
+        // getCommandInfo
+
+
+        // Note: Implemented by base class.
+        aRet <<= getCommandInfo( Environment, false );
+    }
+    else if ( aCommand.Name == "open" )
+    {
+
+        // open
+
+
+        ucb::OpenCommandArgument2 aOpenCommand;
+        if ( !( aCommand.Argument >>= aOpenCommand ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet = open( aOpenCommand, Environment );
+
+        if ( (aOpenCommand.Mode == ucb::OpenMode::DOCUMENT ||
+              aOpenCommand.Mode == ucb::OpenMode::DOCUMENT_SHARE_DENY_WRITE) &&
+                supportsExclusiveWriteLock( Environment ) )
+            lock( Environment );
+    }
+    else if ( aCommand.Name == "insert" )
+    {
+
+        // insert
+
+
+        ucb::InsertCommandArgument arg;
+        if ( !( aCommand.Argument >>= arg ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        insert( arg.Data, arg.ReplaceExisting, Environment );
+    }
+    else if ( aCommand.Name == "delete" )
+    {
+
+        // delete
+
+
+        bool bDeletePhysical = false;
+        aCommand.Argument >>= bDeletePhysical;
+
+//  KSO: Ignore parameter and destroy the content, if you don't support
+//       putting objects into trashcan. ( Since we do not have a trash can
+//       service yet (src603), you actually have no other choice. )
+//      if ( bDeletePhysical )
+//  {
+        try
+        {
+            std::unique_ptr< DAVResourceAccess > xResAccess;
+            {
+                osl::Guard< osl::Mutex > aGuard( m_aMutex );
+                xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+            }
+            xResAccess->DESTROY( Environment );
+            {
+                osl::Guard< osl::Mutex > aGuard( m_aMutex );
+                m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+            }
+        }
+        catch ( DAVException const & e )
+        {
+            cancelCommandExecution( e, Environment, true );
+            // Unreachable
+        }
+//      }
+
+        // Propagate destruction.
+        destroy( bDeletePhysical );
+
+        // Remove own and all children's Additional Core Properties.
+        removeAdditionalPropertySet();
+    }
+    else if ( aCommand.Name == "transfer" && isFolder( Environment ) )
+    {
+
+        // transfer
+        //  ( Not available at documents )
+
+
+        ucb::TransferInfo transferArgs;
+        if ( !( aCommand.Argument >>= transferArgs ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                  "Wrong argument type!",
+                                  static_cast< cppu::OWeakObject * >( this ),
+                                  -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        transfer( transferArgs, Environment );
+    }
+    else if ( aCommand.Name == "post" )
+    {
+
+        // post
+
+
+        ucb::PostCommandArgument2 aArg;
+        if ( !( aCommand.Argument >>= aArg ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        post( aArg, Environment );
+    }
+    else if ( aCommand.Name == "lock" &&
+              supportsExclusiveWriteLock( Environment ) )
+    {
+
+        // lock
+
+
+        lock( Environment );
+    }
+    else if ( aCommand.Name == "unlock" &&
+              supportsExclusiveWriteLock( Environment ) )
+    {
+
+        // unlock
+
+
+        unlock( Environment );
+    }
+    else if ( aCommand.Name == "createNewContent" &&
+              isFolder( Environment ) )
+    {
+
+        // createNewContent
+
+
+        ucb::ContentInfo aArg;
+        if ( !( aCommand.Argument >>= aArg ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+            // Unreachable
+        }
+
+        aRet <<= createNewContent( aArg );
+    }
+    else if ( aCommand.Name == "addProperty" )
+    {
+        ucb::PropertyCommandArgument aPropArg;
+        if ( !( aCommand.Argument >>= aPropArg ))
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+        }
+
+        // TODO when/if XPropertyContainer is removed,
+        // the command execution can be canceled in addProperty
+        try
+        {
+            addProperty( aPropArg, Environment );
+        }
+        catch ( const beans::PropertyExistException &e )
+        {
+            ucbhelper::cancelCommandExecution( uno::makeAny( e ), Environment );
+        }
+        catch ( const beans::IllegalTypeException&e )
+        {
+            ucbhelper::cancelCommandExecution( uno::makeAny( e ), Environment );
+        }
+        catch ( const lang::IllegalArgumentException&e )
+        {
+            ucbhelper::cancelCommandExecution( uno::makeAny( e ), Environment );
+        }
+    }
+    else if ( aCommand.Name == "removeProperty" )
+    {
+        OUString sPropName;
+        if ( !( aCommand.Argument >>= sPropName ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( lang::IllegalArgumentException(
+                                    "Wrong argument type!",
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    -1 ) ),
+                Environment );
+        }
+
+        // TODO when/if XPropertyContainer is removed,
+        // the command execution can be canceled in removeProperty
+        try
+        {
+            removeProperty( sPropName, Environment );
+        }
+        catch( const beans::UnknownPropertyException &e )
+        {
+            ucbhelper::cancelCommandExecution( uno::makeAny( e ), Environment );
+        }
+        catch( const beans::NotRemoveableException &e )
+        {
+            ucbhelper::cancelCommandExecution( uno::makeAny( e ), Environment );
+        }
+    }
+    else
+    {
+
+        // Unsupported command
+
+
+        ucbhelper::cancelCommandExecution(
+            uno::makeAny( ucb::UnsupportedCommandException(
+                              aCommand.Name,
+                              static_cast< cppu::OWeakObject * >( this ) ) ),
+            Environment );
+        // Unreachable
+    }
+
+    SAL_INFO("ucb.ucp.webdav",  "<<<<< Content::execute: end: command: " << aCommand.Name);
+    return aRet;
+}
+
+
+// virtual
+void SAL_CALL Content::abort( sal_Int32 /*CommandId*/ )
+{
+    try
+    {
+        std::unique_ptr< DAVResourceAccess > xResAccess;
+        {
+            osl::MutexGuard aGuard( m_aMutex );
+            xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+        }
+        DAVResourceAccess::abort();
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+        }
+    }
+    catch ( DAVException const & )
+    {
+        // abort failed!
+    }
+}
+
+
+// XPropertyContainer methods.
+
+
+void Content::addProperty( const css::ucb::PropertyCommandArgument &aCmdArg,
+                           const uno::Reference< ucb::XCommandEnvironment >& xEnv  )
+{
+//    if ( m_bTransient )
+//   @@@ ???
+    const beans::Property aProperty = aCmdArg.Property;
+    const uno::Any aDefaultValue = aCmdArg.DefaultValue;
+
+    // check property Name
+    if ( !aProperty.Name.getLength() )
+        throw lang::IllegalArgumentException(
+            "\"addProperty\" with empty Property.Name",
+            static_cast< ::cppu::OWeakObject * >( this ),
+            -1 );
+
+    // Check property type.
+    if ( !UCBDeadPropertyValue::supportsType( aProperty.Type ) )
+        throw beans::IllegalTypeException(
+            "\"addProperty\" unsupported Property.Type",
+            static_cast< ::cppu::OWeakObject * >( this ) );
+
+    // check default value
+    if ( aDefaultValue.hasValue() && aDefaultValue.getValueType() != aProperty.Type )
+        throw beans::IllegalTypeException(
+            "\"addProperty\" DefaultValue does not match Property.Type",
+            static_cast< ::cppu::OWeakObject * >( this ) );
+
+
+    // Make sure a property with the requested name does not already
+    // exist in dynamic and static(!) properties.
+
+
+    // Take into account special properties with custom namespace
+    // using <prop:the_propname xmlns:prop="the_namespace">
+    OUString aSpecialName;
+    bool bIsSpecial = DAVProperties::isUCBSpecialProperty( aProperty.Name, aSpecialName );
+
+    // Note: This requires network access!
+    if ( getPropertySetInfo( xEnv, false /* don't cache data */ )
+            ->hasPropertyByName( bIsSpecial ? aSpecialName : aProperty.Name ) )
+    {
+        // Property does already exist.
+        throw beans::PropertyExistException();
+    }
+
+
+    // Add a new dynamic property.
+
+
+    ProppatchValue aValue( PROPSET, aProperty.Name, aDefaultValue );
+
+    std::vector< ProppatchValue > aProppatchValues;
+    aProppatchValues.push_back( aValue );
+
+    try
+    {
+        // Set property value at server.
+        std::unique_ptr< DAVResourceAccess > xResAccess;
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+        }
+        xResAccess->PROPPATCH( aProppatchValues, xEnv );
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+        }
+
+        // Notify propertyset info change listeners.
+        beans::PropertySetInfoChangeEvent evt(
+            static_cast< cppu::OWeakObject * >( this ),
+            bIsSpecial ? aSpecialName : aProperty.Name,
+            -1, // No handle available
+            beans::PropertySetInfoChange::PROPERTY_INSERTED );
+        notifyPropertySetInfoChange( evt );
+    }
+    catch ( DAVException const & e )
+    {
+        if ( e.getStatus() == SC_FORBIDDEN )
+        {
+            // Support for setting arbitrary dead properties is optional!
+
+            // Store property locally.
+            ContentImplHelper::addProperty( bIsSpecial ? aSpecialName : aProperty.Name,
+                                            aProperty.Attributes,
+                                            aDefaultValue );
+        }
+        else
+        {
+            if ( shouldAccessNetworkAfterException( e ) )
+            {
+                try
+                {
+                    const ResourceType & rType = getResourceType( xEnv );
+                    switch ( rType )
+                    {
+                    case UNKNOWN:
+                    case DAV:
+                        throw lang::IllegalArgumentException();
+
+                    case NON_DAV:
+                        // Store property locally.
+                        ContentImplHelper::addProperty( bIsSpecial ? aSpecialName : aProperty.Name,
+                                                        aProperty.Attributes,
+                                                        aDefaultValue );
+                        break;
+
+                    default:
+                        SAL_WARN( "ucb.ucp.webdav",
+                                    "Content::addProperty - "
+                                    "Unsupported resource type!" );
+                        break;
+                    }
+                }
+                catch ( uno::Exception const & )
+                {
+                    SAL_WARN( "ucb.ucp.webdav",
+                                "Content::addProperty - "
+                                "Unable to determine resource type!" );
+                }
+            }
+            else
+            {
+                SAL_WARN( "ucb.ucp.webdav",
+                            "Content::addProperty - "
+                            "Unable to determine resource type!" );
+            }
+        }
+    }
+}
+
+void Content::removeProperty( const OUString& Name,
+                              const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+#if 0
+    // @@@ REMOVABLE at the moment not properly set in the PropSetInfo
+    try
+    {
+        beans::Property aProp
+        = getPropertySetInfo( xEnv, false /* don't cache data */ )
+          ->getPropertyByName( Name );
+
+        if ( !( aProp.Attributes & beans::PropertyAttribute::REMOVABLE ) )
+        {
+            // Not removable!
+            throw beans::NotRemoveableException();
+        }
+    }
+    catch ( beans::UnknownPropertyException const & )
+    {
+        //SAL_WARN( "ucb.ucp.webdav", "removeProperty - Unknown property!" );
+        throw;
+    }
+#endif
+
+    // Try to remove property from server.
+    try
+    {
+        std::vector< ProppatchValue > aProppatchValues;
+        ProppatchValue aValue( PROPREMOVE, Name, uno::Any() );
+        aProppatchValues.push_back( aValue );
+
+        // Remove property value from server.
+        std::unique_ptr< DAVResourceAccess > xResAccess;
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+        }
+        xResAccess->PROPPATCH( aProppatchValues, xEnv );
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+        }
+
+        // Notify propertyset info change listeners.
+        beans::PropertySetInfoChangeEvent evt(
+            static_cast< cppu::OWeakObject * >( this ),
+            Name,
+            -1, // No handle available
+            beans::PropertySetInfoChange::PROPERTY_REMOVED );
+        notifyPropertySetInfoChange( evt );
+    }
+    catch ( DAVException const & e )
+    {
+        if ( e.getStatus() == SC_FORBIDDEN )
+        {
+            // Support for setting arbitrary dead properties is optional!
+
+            // Try to remove property from local store.
+            ContentImplHelper::removeProperty( Name );
+        }
+        else
+        {
+            if ( shouldAccessNetworkAfterException( e ) )
+            {
+                try
+                {
+                    const ResourceType & rType = getResourceType( xEnv );
+                    switch ( rType )
+                    {
+                    case UNKNOWN:
+                    case DAV:
+                        throw beans::UnknownPropertyException(Name);
+
+                    case NON_DAV:
+                        // Try to remove property from local store.
+                        ContentImplHelper::removeProperty( Name );
+                        break;
+
+                    default:
+                        SAL_WARN( "ucb.ucp.webdav",
+                                    "Content::removeProperty - "
+                                    "Unsupported resource type!" );
+                        break;
+                    }
+                }
+                catch ( uno::Exception const & )
+                {
+                    SAL_WARN( "ucb.ucp.webdav",
+                                "Content::removeProperty - "
+                                "Unable to determine resource type!" );
+                }
+            }
+            else
+            {
+                SAL_WARN( "ucb.ucp.webdav",
+                            "Content::removeProperty - "
+                            "Unable to determine resource type!" );
+//                throw beans::UnknownPropertyException();
+            }
+        }
+    }
+}
+
+// virtual
+void SAL_CALL Content::addProperty( const OUString& Name,
+                                    sal_Int16 Attributes,
+                                    const uno::Any& DefaultValue )
+{
+    beans::Property aProperty;
+    aProperty.Name = Name;
+    aProperty.Type = DefaultValue.getValueType();
+    aProperty.Attributes = Attributes;
+    aProperty.Handle = -1;
+
+    addProperty( ucb::PropertyCommandArgument( aProperty, DefaultValue ),
+                 uno::Reference< ucb::XCommandEnvironment >());
+}
+
+// virtual
+void SAL_CALL Content::removeProperty( const OUString& Name )
+{
+    removeProperty( Name,
+                    uno::Reference< ucb::XCommandEnvironment >() );
+}
+
+
+// XContentCreator methods.
+
+
+// virtual
+uno::Sequence< ucb::ContentInfo > SAL_CALL
+Content::queryCreatableContentsInfo()
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Sequence< ucb::ContentInfo > aSeq( 2 );
+
+    // document.
+    aSeq.getArray()[ 0 ].Type = WEBDAV_CONTENT_TYPE;
+    aSeq.getArray()[ 0 ].Attributes
+        = ucb::ContentInfoAttribute::INSERT_WITH_INPUTSTREAM
+          | ucb::ContentInfoAttribute::KIND_DOCUMENT;
+
+    beans::Property aProp;
+    m_pProvider->getProperty( "Title", aProp );
+
+    uno::Sequence< beans::Property > aDocProps( 1 );
+    aDocProps.getArray()[ 0 ] = aProp;
+    aSeq.getArray()[ 0 ].Properties = aDocProps;
+
+    // folder.
+    aSeq.getArray()[ 1 ].Type = WEBDAV_COLLECTION_TYPE;
+    aSeq.getArray()[ 1 ].Attributes
+        = ucb::ContentInfoAttribute::KIND_FOLDER;
+
+    uno::Sequence< beans::Property > aFolderProps( 1 );
+    aFolderProps.getArray()[ 0 ] = aProp;
+    aSeq.getArray()[ 1 ].Properties = aFolderProps;
+    return aSeq;
+}
+
+
+// virtual
+uno::Reference< ucb::XContent > SAL_CALL
+Content::createNewContent( const ucb::ContentInfo& Info )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    if ( !Info.Type.getLength() )
+        return uno::Reference< ucb::XContent >();
+
+    if ( ( Info.Type != WEBDAV_COLLECTION_TYPE )
+         &&
+         ( Info.Type != WEBDAV_CONTENT_TYPE ) )
+        return uno::Reference< ucb::XContent >();
+
+    OUString aURL = m_xIdentifier->getContentIdentifier();
+
+    SAL_WARN_IF( aURL.isEmpty(), "ucb.ucp.webdav",
+                "WebdavContent::createNewContent - empty identifier!" );
+
+    if ( ( aURL.lastIndexOf( '/' ) + 1 ) != aURL.getLength() )
+        aURL += "/";
+
+    bool isCollection;
+    if ( Info.Type == WEBDAV_COLLECTION_TYPE )
+    {
+        aURL += "New_Collection";
+        isCollection = true;
+    }
+    else
+    {
+        aURL += "New_Content";
+        isCollection = false;
+    }
+
+    uno::Reference< ucb::XContentIdentifier > xId(
+                    new ::ucbhelper::ContentIdentifier( aURL ) );
+
+    // create the local content
+    try
+    {
+        return new ::http_dav_ucp::Content( m_xContext,
+                                          m_pProvider,
+                                          xId,
+                                          m_xResAccess->getSessionFactory(),
+                                          isCollection );
+    }
+    catch ( ucb::ContentCreationException & )
+    {
+        return uno::Reference< ucb::XContent >();
+    }
+}
+
+
+// virtual
+OUString Content::getParentURL()
+{
+    // <scheme>://              -> ""
+    // <scheme>://foo           -> ""
+    // <scheme>://foo/          -> ""
+    // <scheme>://foo/bar       -> <scheme>://foo/
+    // <scheme>://foo/bar/      -> <scheme>://foo/
+    // <scheme>://foo/bar/abc   -> <scheme>://foo/bar/
+
+    OUString aURL = m_xIdentifier->getContentIdentifier();
+
+    sal_Int32 nPos = aURL.lastIndexOf( '/' );
+    if ( nPos == ( aURL.getLength() - 1 ) )
+    {
+        // Trailing slash found. Skip.
+        nPos = aURL.lastIndexOf( '/', nPos );
+    }
+
+    sal_Int32 nPos1 = aURL.lastIndexOf( '/', nPos );
+    if ( nPos1 != -1 )
+        nPos1 = aURL.lastIndexOf( '/', nPos1 );
+
+    if ( nPos1 == -1 )
+        return OUString();
+
+    return aURL.copy( 0, nPos + 1 );
+}
+
+
+// Non-interface methods.
+
+
+// static
+uno::Reference< sdbc::XRow > Content::getPropertyValues(
+    const uno::Reference< uno::XComponentContext >& rxContext,
+    const uno::Sequence< beans::Property >& rProperties,
+    const ContentProperties& rData,
+    const rtl::Reference< ::ucbhelper::ContentProviderImplHelper >& rProvider,
+    const OUString& rContentId )
+{
+    // Note: Empty sequence means "get values of all supported properties".
+
+    rtl::Reference< ::ucbhelper::PropertyValueSet > xRow
+        = new ::ucbhelper::PropertyValueSet( rxContext );
+
+    sal_Int32 nCount = rProperties.getLength();
+    if ( nCount )
+    {
+        uno::Reference< beans::XPropertySet > xAdditionalPropSet;
+        bool bTriedToGetAdditionalPropSet = false;
+
+        const beans::Property* pProps = rProperties.getConstArray();
+        for ( sal_Int32 n = 0; n < nCount; ++n )
+        {
+            const beans::Property& rProp = pProps[ n ];
+
+            // Process standard UCB, DAV and HTTP properties.
+            const uno::Any & rValue = rData.getValue( rProp.Name );
+            if ( rValue.hasValue() )
+            {
+                xRow->appendObject( rProp, rValue );
+            }
+            else
+            {
+                // Process local Additional Properties.
+                if ( !bTriedToGetAdditionalPropSet && !xAdditionalPropSet.is() )
+                {
+                    xAdditionalPropSet =
+                            rProvider->getAdditionalPropertySet( rContentId,
+                                                                 false );
+                    bTriedToGetAdditionalPropSet = true;
+                }
+
+                if ( !xAdditionalPropSet.is() ||
+                     !xRow->appendPropertySetValue(
+                                            xAdditionalPropSet, rProp ) )
+                {
+                    // Append empty entry.
+                    xRow->appendVoid( rProp );
+                }
+            }
+        }
+    }
+    else
+    {
+        // Append all standard UCB, DAV and HTTP properties.
+
+        const std::unique_ptr< PropertyValueMap > & xProps = rData.getProperties();
+
+        ContentProvider * pProvider
+            = static_cast< ContentProvider * >( rProvider.get() );
+        beans::Property aProp;
+
+        for ( const auto& rProp : *xProps )
+        {
+            if ( pProvider->getProperty( rProp.first, aProp ) )
+                xRow->appendObject( aProp, rProp.second.value() );
+        }
+
+        // Append all local Additional Properties.
+        uno::Reference< beans::XPropertySet > xSet =
+            rProvider->getAdditionalPropertySet( rContentId, false );
+        xRow->appendPropertySet( xSet );
+    }
+
+    return uno::Reference< sdbc::XRow >( xRow.get() );
+}
+
+
+uno::Reference< sdbc::XRow > Content::getPropertyValues(
+                const uno::Sequence< beans::Property >& rProperties,
+                const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+    std::unique_ptr< ContentProperties > xProps;
+    std::unique_ptr< ContentProperties > xCachedProps;
+    std::unique_ptr< DAVResourceAccess > xResAccess;
+    OUString aUnescapedTitle;
+    bool bHasAll = false;
+    uno::Reference< uno::XComponentContext > xContext;
+    uno::Reference< ucb::XContentIdentifier > xIdentifier;
+    rtl::Reference< ::ucbhelper::ContentProviderImplHelper > xProvider;
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        aUnescapedTitle = SerfUri::unescape( m_aEscapedTitle );
+        xContext.set( m_xContext );
+        xIdentifier.set( m_xIdentifier );
+        xProvider.set( m_xProvider.get() );
+        xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+
+        // First, ask cache...
+        if ( m_xCachedProps.get() )
+        {
+            xCachedProps.reset( new ContentProperties( *m_xCachedProps ) );
+
+            std::vector< OUString > aMissingProps;
+            if ( xCachedProps->containsAllNames( rProperties, aMissingProps ) )
+            {
+                // All properties are already in cache! No server access needed.
+                bHasAll = true;
+            }
+
+            // use the cached ContentProperties instance
+            xProps.reset( new ContentProperties( *xCachedProps ) );
+        }
+    }
+
+    if ( !m_bTransient && !bHasAll )
+    {
+        // Obtain values from server...
+
+
+        // First, identify whether resource is DAV or not
+        bool bNetworkAccessAllowed = true;
+        const ResourceType & rType = getResourceType( xEnv, xResAccess, &bNetworkAccessAllowed );
+
+        if ( DAV == rType )
+        {
+            // cache lookup... getResourceType may fill the props cache via
+            // PROPFIND!
+            if ( m_xCachedProps.get() )
+            {
+                xCachedProps.reset(
+                    new ContentProperties( *m_xCachedProps ) );
+
+                std::vector< OUString > aMissingProps;
+                if ( xCachedProps->containsAllNames(
+                         rProperties, aMissingProps ) )
+                {
+                    // All properties are already in cache! No server access
+                    // needed.
+                    bHasAll = true;
+                }
+
+                // use the cached ContentProperties instance
+                xProps.reset( new ContentProperties( *xCachedProps ) );
+            }
+
+            if ( !bHasAll )
+            {
+                // Only DAV resources support PROPFIND
+                std::vector< OUString > aPropNames;
+
+                uno::Sequence< beans::Property > aProperties(
+                    rProperties.getLength() );
+
+                if ( !m_aFailedPropNames.empty() )
+                {
+                    sal_Int32 nProps = 0;
+                    sal_Int32 nCount = rProperties.getLength();
+                    for ( sal_Int32 n = 0; n < nCount; ++n )
+                    {
+                        const OUString & rName = rProperties[ n ].Name;
+
+                        if ( std::none_of(m_aFailedPropNames.begin(), m_aFailedPropNames.end(),
+                                [&rName](const OUString& rPropName) { return rPropName == rName; }) )
+                        {
+                            aProperties[ nProps ] = rProperties[ n ];
+                            nProps++;
+                        }
+                    }
+
+                    aProperties.realloc( nProps );
+                }
+                else
+                {
+                    aProperties = rProperties;
+                }
+
+                if ( aProperties.getLength() > 0 )
+                    ContentProperties::UCBNamesToDAVNames(
+                        aProperties, aPropNames );
+
+                if ( !aPropNames.empty() )
+                {
+                    std::vector< DAVResource > resources;
+                    try
+                    {
+                        xResAccess->PROPFIND(
+                            DAVZERO, aPropNames, resources, xEnv );
+
+                        if ( 1 == resources.size() )
+                        {
+                            if ( xProps.get())
+                                xProps->addProperties(
+                                    aPropNames,
+                                    ContentProperties( resources[ 0 ] ));
+                            else
+                                xProps.reset(
+                                    new ContentProperties( resources[ 0 ] ) );
+                        }
+                    }
+                    catch ( DAVException const & e )
+                    {
+                        bNetworkAccessAllowed = bNetworkAccessAllowed &&
+                            shouldAccessNetworkAfterException( e );
+
+                        if ( !bNetworkAccessAllowed )
+                        {
+                            cancelCommandExecution( e, xEnv );
+                            // unreachable
+                        }
+                    }
+                }
+            }
+        }
+
+        if ( bNetworkAccessAllowed )
+        {
+            // All properties obtained already?
+            std::vector< OUString > aMissingProps;
+            if ( !( xProps.get()
+                    && xProps->containsAllNames(
+                        rProperties, aMissingProps ) )
+                 || !m_bDidGetOrHead )
+            {
+                // Possibly the missing props can be obtained using a HEAD
+                // request.
+
+                std::vector< OUString > aHeaderNames;
+                ContentProperties::UCBNamesToHTTPNames(
+                    rProperties,
+                    aHeaderNames,
+                    true /* bIncludeUnmatched */ );
+
+                if ( !aHeaderNames.empty() )
+                {
+                    try
+                    {
+                        DAVResource resource;
+                        xResAccess->HEAD( aHeaderNames, resource, xEnv );
+                        m_bDidGetOrHead = true;
+
+                        if ( xProps.get() )
+                            xProps->addProperties(
+                                aMissingProps,
+                                ContentProperties( resource ) );
+                        else
+                            xProps.reset ( new ContentProperties( resource ) );
+
+                        if ( m_eResourceType == NON_DAV )
+                            xProps->addProperties( aMissingProps,
+                                                   ContentProperties(
+                                                       aUnescapedTitle,
+                                                       false ) );
+                    }
+                    catch ( DAVException const & e )
+                    {
+                        // non "general-purpose servers" may not support HEAD requests
+                        // see http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.1
+                        // In this case, perform a partial GET only to get the header info
+                        // vid. http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
+                        // WARNING if the server does not support partial GETs,
+                        // the GET will transfer the whole content
+                        bool bError = true;
+                        DAVException aLastException = e;
+
+                        // According to the spec. the origin server SHOULD return
+                        // * 405 (Method Not Allowed):
+                        //      the method is known but not allowed for the requested resource
+                        // * 501 (Not Implemented):
+                        //      the method is unrecognized or not implemented
+                        // TODO SC_NOT_FOUND is only for google-code server
+                        if ( aLastException.getStatus() == SC_NOT_IMPLEMENTED ||
+                                aLastException.getStatus() == SC_METHOD_NOT_ALLOWED ||
+                                aLastException.getStatus() == SC_NOT_FOUND )
+                        {
+                            lcl_sendPartialGETRequest( bError,
+                                                       aLastException,
+                                                       aMissingProps,
+                                                       aHeaderNames,
+                                                       xResAccess,
+                                                       xProps,
+                                                       xEnv );
+                            m_bDidGetOrHead = !bError;
+                        }
+
+                        if ( bError )
+                        {
+                            if ( !shouldAccessNetworkAfterException( aLastException ) )
+                            {
+                                cancelCommandExecution( aLastException, xEnv );
+                                // unreachable
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        // might trigger HTTP redirect.
+        // Therefore, title must be updated here.
+        SerfUri aUri( xResAccess->getURL() );
+        aUnescapedTitle = aUri.GetPathBaseNameUnescaped();
+
+        if ( rType == UNKNOWN )
+        {
+            xProps.reset( new ContentProperties( aUnescapedTitle ) );
+        }
+
+        // For DAV resources we only know the Title, for non-DAV
+        // resources we additionally know that it is a document.
+
+        if ( rType == DAV )
+        {
+            //xProps.reset(
+            //    new ContentProperties( aUnescapedTitle ) );
+            xProps->addProperty(
+                "Title",
+                uno::makeAny( aUnescapedTitle ),
+                true );
+        }
+        else
+        {
+            if ( !xProps.get() )
+                xProps.reset( new ContentProperties( aUnescapedTitle, false ) );
+            else
+                xProps->addProperty(
+                    "Title",
+                    uno::makeAny( aUnescapedTitle ),
+                    true );
+
+            xProps->addProperty(
+                "IsFolder",
+                uno::makeAny( false ),
+                true );
+            xProps->addProperty(
+                "IsDocument",
+                uno::makeAny( true ),
+                true );
+            xProps->addProperty(
+                "ContentType",
+                uno::makeAny( OUString(WEBDAV_CONTENT_TYPE) ),
+                true );
+        }
+    }
+    else
+    {
+        // No server access for just created (not yet committed) objects.
+        // Only a minimal set of properties supported at this stage.
+        if (m_bTransient)
+            xProps.reset( new ContentProperties( aUnescapedTitle,
+                                                 m_bCollection ) );
+    }
+
+    sal_Int32 nCount = rProperties.getLength();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const OUString rName = rProperties[ n ].Name;
+        if ( rName == "BaseURI" )
+        {
+            // Add BaseURI property, if requested.
+            xProps->addProperty(
+                 "BaseURI",
+                 uno::makeAny( getBaseURI( xResAccess ) ),
+                 true );
+        }
+        else if ( rName == "CreatableContentsInfo" )
+        {
+            // Add CreatableContentsInfo property, if requested.
+            bool bFolder = false;
+            xProps->getValue( "IsFolder" )
+                    >>= bFolder;
+            xProps->addProperty(
+                "CreatableContentsInfo",
+                uno::makeAny( bFolder
+                                  ? queryCreatableContentsInfo()
+                                  : uno::Sequence< ucb::ContentInfo >() ),
+                true );
+        }
+    }
+
+    uno::Reference< sdbc::XRow > xResultRow
+        = getPropertyValues( xContext,
+                             rProperties,
+                             *xProps,
+                             xProvider,
+                             xIdentifier->getContentIdentifier() );
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        if ( !m_xCachedProps.get() )
+            m_xCachedProps.reset( new CachableContentProperties( *xProps ) );
+        else
+            m_xCachedProps->addProperties( *xProps );
+
+        m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+        m_aEscapedTitle = SerfUri::escapeSegment( aUnescapedTitle );
+    }
+
+    return xResultRow;
+}
+
+
+uno::Sequence< uno::Any > Content::setPropertyValues(
+                const uno::Sequence< beans::PropertyValue >& rValues,
+                const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+    uno::Reference< ucb::XContentIdentifier >    xIdentifier;
+    rtl::Reference< ContentProvider >            xProvider;
+    bool bTransient;
+    std::unique_ptr< DAVResourceAccess > xResAccess;
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        xProvider.set( m_pProvider );
+        xIdentifier.set( m_xIdentifier );
+        bTransient = m_bTransient;
+        xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+    }
+
+    uno::Sequence< uno::Any > aRet( rValues.getLength() );
+    uno::Sequence< beans::PropertyChangeEvent > aChanges( rValues.getLength() );
+    sal_Int32 nChanged = 0;
+
+    beans::PropertyChangeEvent aEvent;
+    aEvent.Source         = static_cast< cppu::OWeakObject * >( this );
+    aEvent.Further        = false;
+    // aEvent.PropertyName =
+    aEvent.PropertyHandle = -1;
+    // aEvent.OldValue   =
+    // aEvent.NewValue   =
+
+    std::vector< ProppatchValue > aProppatchValues;
+    std::vector< sal_Int32 > aProppatchPropsPositions;
+
+    uno::Reference< ucb::XPersistentPropertySet > xAdditionalPropSet;
+    bool bTriedToGetAdditionalPropSet = false;
+
+    bool bExchange = false;
+    OUString aNewTitle;
+    OUString aOldTitle;
+    sal_Int32 nTitlePos = -1;
+
+    uno::Reference< beans::XPropertySetInfo > xInfo;
+
+    const beans::PropertyValue* pValues = rValues.getConstArray();
+    sal_Int32 nCount = rValues.getLength();
+    for ( sal_Int32 n = 0; n < nCount; ++n )
+    {
+        const beans::PropertyValue& rValue = pValues[ n ];
+        const OUString & rName = rValue.Name;
+
+        beans::Property aTmpProp;
+        xProvider->getProperty( rName, aTmpProp );
+
+        if ( aTmpProp.Attributes & beans::PropertyAttribute::READONLY )
+        {
+            // Read-only property!
+            aRet[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            static_cast< cppu::OWeakObject * >( this ) );
+            continue;
+        }
+
+
+        // Mandatory props.
+
+
+        if ( rName == "ContentType" )
+        {
+            // Read-only property!
+            aRet[ n ] <<= lang::IllegalAccessException(
+                "Property is read-only!",
+                static_cast< cppu::OWeakObject * >( this ) );
+        }
+        else if ( rName == "IsDocument" )
+        {
+            // Read-only property!
+            aRet[ n ] <<= lang::IllegalAccessException(
+                "Property is read-only!",
+                static_cast< cppu::OWeakObject * >( this ) );
+        }
+        else if ( rName == "IsFolder" )
+        {
+            // Read-only property!
+            aRet[ n ] <<= lang::IllegalAccessException(
+                            "Property is read-only!",
+                            static_cast< cppu::OWeakObject * >( this ) );
+        }
+        else if ( rName == "Title" )
+        {
+            OUString aNewValue;
+            if ( rValue.Value >>= aNewValue )
+            {
+                // No empty titles!
+                if ( aNewValue.getLength() > 0 )
+                {
+                    try
+                    {
+                        SerfUri aURI( xIdentifier->getContentIdentifier() );
+                        aOldTitle = aURI.GetPathBaseNameUnescaped();
+
+                        if ( aNewValue != aOldTitle )
+                        {
+                            // modified title -> modified URL -> exchange !
+                            if ( !bTransient )
+                                bExchange = true;
+
+                            // new value will be set later...
+                            aNewTitle = aNewValue;
+
+                            // remember position within sequence of values (for
+                            // error handling).
+                            nTitlePos = n;
+                        }
+                    }
+                    catch ( DAVException const & )
+                    {
+                        aRet[ n ] <<= lang::IllegalArgumentException(
+                            "Invalid content identifier!",
+                            static_cast< cppu::OWeakObject * >( this ),
+                            -1 );
+                    }
+                }
+                else
+                {
+                    aRet[ n ] <<= lang::IllegalArgumentException(
+                        "Empty title not allowed!",
+                        static_cast< cppu::OWeakObject * >( this ),
+                        -1 );
+                }
+            }
+            else
+            {
+                aRet[ n ] <<= beans::IllegalTypeException(
+                    "Property value has wrong type!",
+                    static_cast< cppu::OWeakObject * >( this ) );
+            }
+        }
+        else
+        {
+
+            // Optional props.
+
+
+            OUString aSpecialName;
+            bool bIsSpecial = DAVProperties::isUCBSpecialProperty( rName, aSpecialName );
+
+            if ( !xInfo.is() )
+                xInfo = getPropertySetInfo( xEnv,
+                                            false /* don't cache data */ );
+
+            if ( !xInfo->hasPropertyByName( bIsSpecial ? aSpecialName : rName ) )
+            {
+                // Check, whether property exists. Skip otherwise.
+                // PROPPATCH::set would add the property automatically, which
+                // is not allowed for "setPropertyValues" command!
+                aRet[ n ] <<= beans::UnknownPropertyException(
+                                "Property is unknown!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+                continue;
+            }
+
+            if ( rName == "Size" )
+            {
+                // Read-only property!
+                aRet[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+            else if ( rName == "DateCreated" )
+            {
+                // Read-only property!
+                aRet[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+            else if ( rName == "DateModified" )
+            {
+                // Read-only property!
+                aRet[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+            else if ( rName == "MediaType" )
+            {
+                // Read-only property!
+                // (but could be writable, if 'getcontenttype' would be)
+                aRet[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+            if ( rName == "CreatableContentsInfo" )
+            {
+                // Read-only property!
+                aRet[ n ] <<= lang::IllegalAccessException(
+                                "Property is read-only!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+            }
+            else
+            {
+                if ( getResourceType( xEnv, xResAccess ) == DAV )
+                {
+                    // Property value will be set on server.
+                    ProppatchValue aValue( PROPSET, rName, rValue.Value );
+                    aProppatchValues.push_back( aValue );
+
+                    // remember position within sequence of values (for
+                    // error handling).
+                    aProppatchPropsPositions.push_back( n );
+                }
+                else
+                {
+                    // Property value will be stored in local property store.
+                    if ( !bTriedToGetAdditionalPropSet &&
+                         !xAdditionalPropSet.is() )
+                    {
+                        xAdditionalPropSet
+                            = getAdditionalPropertySet( false );
+                        bTriedToGetAdditionalPropSet = true;
+                    }
+
+                    if ( xAdditionalPropSet.is() )
+                    {
+                        try
+                        {
+                            uno::Any aOldValue
+                                = xAdditionalPropSet->getPropertyValue( rName );
+                            if ( aOldValue != rValue.Value )
+                            {
+                                xAdditionalPropSet->setPropertyValue(
+                                                        rName, rValue.Value );
+
+                                aEvent.PropertyName = rName;
+                                aEvent.OldValue     = aOldValue;
+                                aEvent.NewValue     = rValue.Value;
+
+                                aChanges.getArray()[ nChanged ] = aEvent;
+                                nChanged++;
+                            }
+                        }
+                        catch ( beans::UnknownPropertyException const & e )
+                        {
+                            aRet[ n ] <<= e;
+                        }
+                        catch ( lang::WrappedTargetException const & e )
+                        {
+                            aRet[ n ] <<= e;
+                        }
+                        catch ( beans::PropertyVetoException const & e )
+                        {
+                            aRet[ n ] <<= e;
+                        }
+                        catch ( lang::IllegalArgumentException const & e )
+                        {
+                            aRet[ n ] <<= e;
+                        }
+                    }
+                    else
+                    {
+                        aRet[ n ] <<= uno::Exception(
+                                "No property set for storing the value!",
+                                static_cast< cppu::OWeakObject * >( this ) );
+                    }
+                }
+            }
+        }
+    } // for
+
+    if ( !bTransient && (!aProppatchValues.empty()) )
+    {
+        try
+        {
+            // Set property values at server.
+            xResAccess->PROPPATCH( aProppatchValues, xEnv );
+
+            for ( const auto& rProppatchValue : aProppatchValues )
+            {
+                aEvent.PropertyName = rProppatchValue.name;
+                aEvent.OldValue     = uno::Any(); // @@@ too expensive to obtain!
+                aEvent.NewValue     = rProppatchValue.value;
+
+                aChanges.getArray()[ nChanged ] = aEvent;
+                nChanged++;
+            }
+        }
+        catch ( DAVException const & e )
+        {
+//            SAL_WARN( "ucb.ucp.webdav",
+//                        "Content::setPropertyValues - PROPPATCH failed!" );
+
+#if 1
+            cancelCommandExecution( e, xEnv );
+            // unreachable
+#else
+            // Note: PROPPATCH either sets ALL property values OR NOTHING.
+
+            std::vector< sal_Int32 >::const_iterator it
+                = aProppatchPropsPositions.begin();
+            std::vector< sal_Int32 >::const_iterator end
+                = aProppatchPropsPositions.end();
+
+            while ( it != end )
+            {
+                // Set error.
+                aRet[ (*it) ] <<= MapDAVException( e, true );
+                ++it;
+            }
+#endif
+        }
+    }
+
+    if ( bExchange )
+    {
+        // Assemble new content identifier...
+
+        OUString aNewURL = getParentURL();
+        if ( aNewURL.lastIndexOf( '/' ) != ( aNewURL.getLength() - 1 ) )
+            aNewURL += "/";
+
+        aNewURL += SerfUri::escapeSegment( aNewTitle );
+
+        uno::Reference< ucb::XContentIdentifier > xNewId
+            = new ::ucbhelper::ContentIdentifier( aNewURL );
+        uno::Reference< ucb::XContentIdentifier > xOldId = xIdentifier;
+
+        try
+        {
+            SerfUri sourceURI( xOldId->getContentIdentifier() );
+            SerfUri targetURI( xNewId->getContentIdentifier() );
+            targetURI.SetScheme( sourceURI.GetScheme() );
+
+            xResAccess->MOVE(
+                sourceURI.GetPath(), targetURI.GetURI(), false, xEnv );
+            // @@@ Should check for resources that could not be moved
+            //     (due to source access or target overwrite) and send
+            //     this information through the interaction handler.
+
+            // @@@ Existing content should be checked to see if it needs
+            //     to be deleted at the source
+
+            // @@@ Existing content should be checked to see if it has
+            //     been overwritten at the target
+
+            if ( exchangeIdentity( xNewId ) )
+            {
+                xResAccess->setURL( aNewURL );
+
+// DAV resources store all additional props on server!
+//              // Adapt Additional Core Properties.
+//              renameAdditionalPropertySet( xOldId->getContentIdentifier(),
+//                                           xNewId->getContentIdentifier(),
+//                                           true );
+            }
+            else
+            {
+                // Do not set new title!
+                aNewTitle.clear();
+
+                // Set error .
+                aRet[ nTitlePos ] <<= uno::Exception(
+                    "Exchange failed!",
+                    static_cast< cppu::OWeakObject * >( this ) );
+            }
+        }
+        catch ( DAVException const & e )
+        {
+            // Do not set new title!
+            aNewTitle.clear();
+
+            // Set error .
+            aRet[ nTitlePos ] = MapDAVException( e, true );
+        }
+    }
+
+    if ( aNewTitle.getLength() )
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        aEvent.PropertyName = "Title";
+        aEvent.OldValue     <<= aOldTitle;
+        aEvent.NewValue     <<= aNewTitle;
+
+        m_aEscapedTitle     = SerfUri::escapeSegment( aNewTitle );
+
+        aChanges.getArray()[ nChanged ] = aEvent;
+        nChanged++;
+    }
+
+    if ( nChanged > 0 )
+    {
+        aChanges.realloc( nChanged );
+        notifyPropertiesChange( aChanges );
+    }
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+        m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+    }
+
+    return aRet;
+}
+
+
+uno::Any Content::open(
+                const ucb::OpenCommandArgument2 & rArg,
+                const uno::Reference< ucb::XCommandEnvironment > & xEnv )
+{
+    uno::Any aRet;
+
+    bool bOpenFolder = ( ( rArg.Mode == ucb::OpenMode::ALL ) ||
+                             ( rArg.Mode == ucb::OpenMode::FOLDERS ) ||
+                             ( rArg.Mode == ucb::OpenMode::DOCUMENTS ) );
+    if ( bOpenFolder )
+    {
+        if ( isFolder( xEnv ) )
+        {
+            // Open collection.
+
+            uno::Reference< ucb::XDynamicResultSet > xSet
+                = new DynamicResultSet( m_xContext, this, rArg, xEnv );
+            aRet <<= xSet;
+        }
+        else
+        {
+            // Error: Not a folder!
+
+            OUString aMsg( "Non-folder resource cannot be opened as folder! Wrong Open Mode!" );
+
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny(
+                    lang::IllegalArgumentException(
+                        aMsg,
+                        static_cast< cppu::OWeakObject * >( this ),
+                        -1 ) ),
+                xEnv );
+            // Unreachable
+        }
+    }
+
+    if ( rArg.Sink.is() )
+    {
+        // Open document.
+
+        if ( ( rArg.Mode == ucb::OpenMode::DOCUMENT_SHARE_DENY_NONE ) ||
+             ( rArg.Mode == ucb::OpenMode::DOCUMENT_SHARE_DENY_WRITE ) )
+        {
+            // Currently(?) unsupported.
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny(
+                    ucb::UnsupportedOpenModeException(
+                            OUString(),
+                            static_cast< cppu::OWeakObject * >( this ),
+                            sal_Int16( rArg.Mode ) ) ),
+                xEnv );
+            // Unreachable
+        }
+
+        uno::Reference< io::XOutputStream > xOut( rArg.Sink, uno::UNO_QUERY );
+        if ( xOut.is() )
+        {
+            // PUSH: write data
+            try
+            {
+                std::unique_ptr< DAVResourceAccess > xResAccess;
+
+                {
+                    osl::MutexGuard aGuard( m_aMutex );
+
+                    xResAccess.reset(
+                        new DAVResourceAccess( *m_xResAccess ) );
+                }
+
+                DAVResource aResource;
+                std::vector< OUString > aHeaders;
+
+                xResAccess->GET( xOut, aHeaders, aResource, xEnv );
+                m_bDidGetOrHead = true;
+
+                {
+                    osl::MutexGuard aGuard( m_aMutex );
+
+                    // cache headers.
+                    if ( !m_xCachedProps.get())
+                        m_xCachedProps.reset(
+                            new CachableContentProperties( ContentProperties( aResource ) ) );
+                    else
+                        m_xCachedProps->addProperties( ContentProperties( aResource ) );
+
+                    m_xResAccess.reset(
+                        new DAVResourceAccess( *xResAccess ) );
+                }
+            }
+            catch ( DAVException const & e )
+            {
+                cancelCommandExecution( e, xEnv );
+                // Unreachable
+            }
+        }
+        else
+        {
+            uno::Reference< io::XActiveDataSink > xDataSink( rArg.Sink, uno::UNO_QUERY );
+            if ( xDataSink.is() )
+            {
+                // PULL: wait for client read
+                try
+                {
+                    std::unique_ptr< DAVResourceAccess > xResAccess;
+                    {
+                        osl::MutexGuard aGuard( m_aMutex );
+
+                        xResAccess.reset(
+                            new DAVResourceAccess( *m_xResAccess ) );
+                    }
+
+                    // fill inputstream sync; return if all data present
+                    DAVResource aResource;
+                    std::vector< OUString > aHeaders;
+
+                    uno::Reference< io::XInputStream > xIn
+                        = xResAccess->GET( aHeaders, aResource, xEnv );
+                    m_bDidGetOrHead = true;
+
+                    {
+                        osl::MutexGuard aGuard( m_aMutex );
+
+                        // cache headers.
+                        if ( !m_xCachedProps.get())
+                            m_xCachedProps.reset(
+                                new CachableContentProperties( ContentProperties( aResource ) ) );
+                        else
+                            m_xCachedProps->addProperties(
+                                aResource.properties );
+
+                        m_xResAccess.reset(
+                            new DAVResourceAccess( *xResAccess ) );
+                    }
+
+                    xDataSink->setInputStream( xIn );
+                }
+                catch ( DAVException const & e )
+                {
+                    cancelCommandExecution( e, xEnv );
+                    // Unreachable
+                }
+            }
+            else
+            {
+                // Note: aOpenCommand.Sink may contain an XStream
+                //       implementation. Support for this type of
+                //       sink is optional...
+                ucbhelper::cancelCommandExecution(
+                    uno::makeAny(
+                        ucb::UnsupportedDataSinkException(
+                            OUString(),
+                            static_cast< cppu::OWeakObject * >( this ),
+                            rArg.Sink ) ),
+                    xEnv );
+                // Unreachable
+            }
+        }
+    }
+
+    return aRet;
+}
+
+
+void Content::post(
+                const ucb::PostCommandArgument2 & rArg,
+                const uno::Reference< ucb::XCommandEnvironment > & xEnv )
+{
+    uno::Reference< io::XActiveDataSink > xSink( rArg.Sink, uno::UNO_QUERY );
+    if ( xSink.is() )
+    {
+        try
+        {
+            std::unique_ptr< DAVResourceAccess > xResAccess;
+            {
+                osl::MutexGuard aGuard( m_aMutex );
+                xResAccess.reset(
+                    new DAVResourceAccess( *m_xResAccess ) );
+            }
+
+            uno::Reference< io::XInputStream > xResult
+                = xResAccess->POST( rArg.MediaType,
+                                    rArg.Referer,
+                                    rArg.Source,
+                                    xEnv );
+
+            {
+                 osl::MutexGuard aGuard( m_aMutex );
+                 m_xResAccess.reset(
+                     new DAVResourceAccess( *xResAccess ) );
+            }
+
+            xSink->setInputStream( xResult );
+        }
+        catch ( DAVException const & e )
+        {
+            cancelCommandExecution( e, xEnv, true );
+            // Unreachable
+        }
+    }
+    else
+    {
+        uno::Reference< io::XOutputStream > xResult( rArg.Sink, uno::UNO_QUERY );
+        if ( xResult.is() )
+        {
+            try
+            {
+                std::unique_ptr< DAVResourceAccess > xResAccess;
+                {
+                    osl::MutexGuard aGuard( m_aMutex );
+                    xResAccess.reset(
+                        new DAVResourceAccess( *m_xResAccess ) );
+                }
+
+                xResAccess->POST( rArg.MediaType,
+                                  rArg.Referer,
+                                  rArg.Source,
+                                  xResult,
+                                  xEnv );
+
+                {
+                    osl::MutexGuard aGuard( m_aMutex );
+                    m_xResAccess.reset(
+                        new DAVResourceAccess( *xResAccess ) );
+                }
+            }
+            catch ( DAVException const & e )
+            {
+                cancelCommandExecution( e, xEnv, true );
+                // Unreachable
+            }
+        }
+        else
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny(
+                    ucb::UnsupportedDataSinkException(
+                        OUString(),
+                        static_cast< cppu::OWeakObject * >( this ),
+                        rArg.Sink ) ),
+                xEnv );
+            // Unreachable
+        }
+    }
+}
+
+
+void Content::queryChildren( ContentRefList& rChildren )
+{
+    // Obtain a list with a snapshot of all currently instantiated contents
+    // from provider and extract the contents which are direct children
+    // of this content.
+
+    ::ucbhelper::ContentRefList aAllContents;
+    m_xProvider->queryExistingContents( aAllContents );
+
+    OUString aURL = m_xIdentifier->getContentIdentifier();
+    sal_Int32 nURLPos = aURL.lastIndexOf( '/' );
+
+    if ( nURLPos != ( aURL.getLength() - 1 ) )
+    {
+        // No trailing slash found. Append.
+        aURL += "/";
+    }
+
+    sal_Int32 nLen = aURL.getLength();
+
+    for ( const auto& rChild : aAllContents )
+    {
+        ::ucbhelper::ContentImplHelperRef xChild = rChild;
+        OUString aChildURL
+            = xChild->getIdentifier()->getContentIdentifier();
+
+        // Is aURL a prefix of aChildURL?
+        if ( ( aChildURL.getLength() > nLen ) &&
+             ( aChildURL.startsWith( aURL ) ) )
+        {
+            sal_Int32 nPos = nLen;
+            nPos = aChildURL.indexOf( '/', nPos );
+
+            if ( ( nPos == -1 ) ||
+                 ( nPos == ( aChildURL.getLength() - 1 ) ) )
+            {
+                // No further slashes / only a final slash. It's a child!
+                rChildren.push_back(
+                    ::http_dav_ucp::Content::ContentRef(
+                        static_cast< ::http_dav_ucp::Content * >(
+                            xChild.get() ) ) );
+            }
+        }
+    }
+}
+
+
+void Content::insert(
+        const uno::Reference< io::XInputStream > & xInputStream,
+        bool bReplaceExisting,
+        const uno::Reference< ucb::XCommandEnvironment >& Environment )
+{
+    bool bTransient, bCollection;
+    OUString aEscapedTitle;
+    std::unique_ptr< DAVResourceAccess > xResAccess;
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        bTransient    = m_bTransient;
+        bCollection   = m_bCollection;
+        aEscapedTitle = m_aEscapedTitle;
+        xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+    }
+
+    // Check, if all required properties are present.
+
+    if ( aEscapedTitle.isEmpty() )
+    {
+        SAL_WARN( "ucb.ucp.webdav", "Content::insert - Title missing!" );
+
+        uno::Sequence<OUString> aProps { "Title" };
+        ucbhelper::cancelCommandExecution(
+            uno::makeAny( ucb::MissingPropertiesException(
+                                OUString(),
+                                static_cast< cppu::OWeakObject * >( this ),
+                                aProps ) ),
+            Environment );
+        // Unreachable
+    }
+
+    if ( !bReplaceExisting )
+    {
+        /* [RFC 2616] - HTTP
+
+           The PUT method requests that the enclosed entity be stored under the
+           supplied Request-URI. If the Request-URI refers to an already
+           existing resource, the enclosed entity SHOULD be considered as a
+           modified version of the one residing on the origin server.
+        */
+
+        /* [RFC 2518] - WebDAV
+
+           MKCOL creates a new collection resource at the location specified by
+           the Request-URI.  If the resource identified by the Request-URI is
+           non-null then the MKCOL MUST fail.
+        */
+
+        // ==> Complain on PUT, continue on MKCOL.
+        if ( !bTransient || !bCollection )
+        {
+#undef ERROR
+            ucb::UnsupportedNameClashException aEx(
+                "Unable to write without overwrite!",
+                static_cast< cppu::OWeakObject * >( this ),
+                ucb::NameClash::ERROR );
+
+            uno::Reference< task::XInteractionHandler > xIH;
+
+            if ( Environment.is() )
+                xIH = Environment->getInteractionHandler();
+
+            if ( xIH.is() )
+            {
+                uno::Any aExAsAny( uno::makeAny( aEx ) );
+
+                rtl::Reference< ucbhelper::SimpleInteractionRequest > xRequest
+                    = new ucbhelper::SimpleInteractionRequest(
+                        aExAsAny,
+                        ContinuationFlags::Approve
+                            | ContinuationFlags::Disapprove );
+                xIH->handle( xRequest.get() );
+
+                const ContinuationFlags nResp = xRequest->getResponse();
+
+                switch ( nResp )
+                {
+                    case ContinuationFlags::NONE:
+                        // Not handled; throw.
+                        throw aEx;
+//                            break;
+
+                    case ContinuationFlags::Approve:
+                        // Continue -> Overwrite.
+                        bReplaceExisting = true;
+                        break;
+
+                    case ContinuationFlags::Disapprove:
+                        // Abort.
+                        throw ucb::CommandFailedException(
+                                    OUString(),
+                                    uno::Reference< uno::XInterface >(),
+                                    aExAsAny );
+//                            break;
+
+                    default:
+                        SAL_WARN( "ucb.ucp.webdav",
+                                    "Content::insert - "
+                                    "Unknown interaction selection!" );
+                        throw ucb::CommandFailedException(
+                                    "Unknown interaction selection!",
+                                    uno::Reference< uno::XInterface >(),
+                                    aExAsAny );
+//                            break;
+                }
+            }
+            else
+            {
+                // No IH; throw.
+                throw aEx;
+            }
+        }
+    }
+
+    if ( bTransient )
+    {
+        // Assemble new content identifier...
+        OUString aURL = getParentURL();
+        if ( aURL.lastIndexOf( '/' ) != ( aURL.getLength() - 1 ) )
+            aURL += "/";
+
+        aURL += aEscapedTitle;
+
+        try
+        {
+            xResAccess->setURL( aURL );
+
+            if ( bCollection )
+                xResAccess->MKCOL( Environment );
+            else
+                xResAccess->PUT( xInputStream, Environment );
+        }
+        catch ( DAVException const & except )
+        {
+            if ( bCollection )
+            {
+                if ( except.getStatus() == SC_METHOD_NOT_ALLOWED )
+                {
+                    // [RFC 2518] - WebDAV
+                    // 405 (Method Not Allowed) - MKCOL can only be
+                    // executed on a deleted/non-existent resource.
+
+                    if ( bReplaceExisting )
+                    {
+                        // Destroy old resource.
+                        try
+                        {
+                            xResAccess->DESTROY( Environment );
+                        }
+                        catch ( DAVException const & e )
+                        {
+                            cancelCommandExecution( e, Environment, true );
+                            // Unreachable
+                        }
+
+                        // Insert (recursion!).
+                        insert( xInputStream, bReplaceExisting, Environment );
+
+                        {
+                            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+                            m_xResAccess.reset(
+                                new DAVResourceAccess( *xResAccess ) );
+                        }
+
+                        // Success!
+                        return;
+                    }
+                    else
+                    {
+                        OUString aTitle;
+                        try
+                        {
+                            SerfUri aURI( aURL );
+                            aTitle = aURI.GetPathBaseNameUnescaped();
+                        }
+                        catch ( DAVException const & )
+                        {
+                        }
+
+                        ucbhelper::cancelCommandExecution(
+                            uno::makeAny(
+                                ucb::NameClashException(
+                                    OUString(),
+                                    static_cast< cppu::OWeakObject * >( this ),
+                                    task::InteractionClassification_ERROR,
+                                    aTitle ) ),
+                            Environment );
+                        // Unreachable
+                    }
+                }
+            }
+
+            cancelCommandExecution( except, Environment, true );
+            // Unreachable
+        }
+
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            m_xIdentifier
+                = new ::ucbhelper::ContentIdentifier( aURL );
+        }
+
+        inserted();
+
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            m_bTransient = false;
+        }
+    }
+    else
+    {
+        if ( !xInputStream.is() )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny(
+                    ucb::MissingInputStreamException(
+                        OUString(),
+                        static_cast< cppu::OWeakObject * >( this ) ) ),
+                Environment );
+            // Unreachable
+        }
+
+        try
+        {
+            xResAccess->PUT( xInputStream, Environment );
+        }
+        catch ( DAVException const & e )
+        {
+            cancelCommandExecution( e, Environment, true );
+            // Unreachable
+        }
+    }
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+        m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+    }
+}
+
+
+void Content::transfer(
+        const ucb::TransferInfo & rArgs,
+        const uno::Reference< ucb::XCommandEnvironment >& Environment )
+{
+    uno::Reference< uno::XComponentContext > xContext;
+    uno::Reference< ucb::XContentIdentifier >    xIdentifier;
+    uno::Reference< ucb::XContentProvider >      xProvider;
+    std::unique_ptr< DAVResourceAccess > xResAccess;
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+        xContext.set( m_xContext );
+        xIdentifier.set( m_xIdentifier );
+        xProvider.set( m_xProvider.get() );
+        xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+    }
+
+    OUString aTargetURI;
+    try
+    {
+        SerfUri sourceURI( rArgs.SourceURL );
+        SerfUri targetURI( xIdentifier->getContentIdentifier() );
+        aTargetURI = targetURI.GetPathBaseNameUnescaped();
+
+        // Check source's and target's URL scheme
+
+        OUString aScheme = sourceURI.GetScheme().toAsciiLowerCase();
+        if ( aScheme == VNDSUNSTARWEBDAV_URL_SCHEME)
+        {
+            sourceURI.SetScheme( HTTP_URL_SCHEME );
+        }
+        else if ( aScheme == VNDSUNSTARWEBDAVS_URL_SCHEME)
+        {
+            sourceURI.SetScheme( HTTPS_URL_SCHEME );
+        }
+        else if ( aScheme == DAV_URL_SCHEME )
+        {
+            sourceURI.SetScheme( HTTP_URL_SCHEME );
+        }
+        else if ( aScheme == DAVS_URL_SCHEME )
+        {
+            sourceURI.SetScheme( HTTPS_URL_SCHEME );
+        }
+        else if (aScheme == WEBDAV_URL_SCHEME)
+        {
+            sourceURI.SetScheme(HTTP_URL_SCHEME);
+        }
+        else if (aScheme == WEBDAVS_URL_SCHEME)
+        {
+            sourceURI.SetScheme(HTTPS_URL_SCHEME);
+        }
+        else
+        {
+            if ( aScheme != HTTP_URL_SCHEME && aScheme != HTTPS_URL_SCHEME )
+            {
+                ucbhelper::cancelCommandExecution(
+                    uno::makeAny(
+                        ucb::InteractiveBadTransferURLException(
+                            "Unsupported URL scheme!",
+                            static_cast< cppu::OWeakObject * >( this ) ) ),
+                    Environment );
+                // Unreachable
+            }
+        }
+
+        aScheme = targetURI.GetScheme().toAsciiLowerCase();
+        if ( aScheme == VNDSUNSTARWEBDAV_URL_SCHEME)
+            targetURI.SetScheme( HTTP_URL_SCHEME );
+        else if ( aScheme == VNDSUNSTARWEBDAVS_URL_SCHEME)
+            targetURI.SetScheme( HTTPS_URL_SCHEME );
+        else if ( aScheme == DAV_URL_SCHEME )
+            targetURI.SetScheme( HTTP_URL_SCHEME );
+        else if ( aScheme == DAVS_URL_SCHEME )
+            targetURI.SetScheme( HTTPS_URL_SCHEME );
+        else if (aScheme == WEBDAV_URL_SCHEME)
+            targetURI.SetScheme(HTTP_URL_SCHEME);
+        else if (aScheme == WEBDAVS_URL_SCHEME)
+            targetURI.SetScheme(HTTPS_URL_SCHEME);
+
+        // @@@ This implementation of 'transfer' only works
+        //     if the source and target are located at same host.
+        //     (Neon does not support cross-server copy/move)
+
+        // Check for same host
+
+        if ( sourceURI.GetHost().getLength() &&
+             ( sourceURI.GetHost() != targetURI.GetHost() ) )
+        {
+            ucbhelper::cancelCommandExecution(
+                uno::makeAny( ucb::InteractiveBadTransferURLException(
+                                "Different hosts!",
+                                static_cast< cppu::OWeakObject * >( this ) ) ),
+                Environment );
+            // Unreachable
+        }
+
+        OUString aTitle = rArgs.NewTitle;
+
+        if ( aTitle.isEmpty() )
+            aTitle = sourceURI.GetPathBaseNameUnescaped();
+
+        if ( aTitle == "/" )
+        {
+            // kso: ???
+            aTitle.clear();
+        }
+
+        targetURI.AppendPath( aTitle );
+
+        OUString aTargetURL = xIdentifier->getContentIdentifier();
+        if ( ( aTargetURL.lastIndexOf( '/' ) + 1 )
+                != aTargetURL.getLength() )
+            aTargetURL += "/";
+
+        aTargetURL += aTitle;
+
+        uno::Reference< ucb::XContentIdentifier > xTargetId
+            = new ::ucbhelper::ContentIdentifier( aTargetURL );
+
+        DAVResourceAccess aSourceAccess( xContext,
+                                         xResAccess->getSessionFactory(),
+                                         sourceURI.GetURI() );
+
+        if ( rArgs.MoveData )
+        {
+            uno::Reference< ucb::XContentIdentifier > xId
+                = new ::ucbhelper::ContentIdentifier( rArgs.SourceURL );
+
+            // Note: The static cast is okay here, because its sure that
+            //       xProvider is always the WebDAVContentProvider.
+            rtl::Reference< Content > xSource
+                = static_cast< Content * >(
+                    xProvider->queryContent( xId ).get() );
+
+            // [RFC 2518] - WebDAV
+            // If a resource exists at the destination and the Overwrite
+            // header is "T" then prior to performing the move the server
+            // MUST perform a DELETE with "Depth: infinity" on the
+            // destination resource.  If the Overwrite header is set to
+            // "F" then the operation will fail.
+
+            aSourceAccess.MOVE( sourceURI.GetPath(),
+                                targetURI.GetURI(),
+                                rArgs.NameClash
+                                    == ucb::NameClash::OVERWRITE,
+                                Environment );
+
+            if ( xSource.is() )
+            {
+                // Propagate destruction to listeners.
+                xSource->destroy( true );
+            }
+
+// DAV resources store all additional props on server!
+//              // Rename own and all children's Additional Core Properties.
+//              renameAdditionalPropertySet( xId->getContentIdentifier(),
+//                                           xTargetId->getContentIdentifier(),
+//                                           true );
+        }
+        else
+        {
+            // [RFC 2518] - WebDAV
+            // If a resource exists at the destination and the Overwrite
+            // header is "T" then prior to performing the copy the server
+            // MUST perform a DELETE with "Depth: infinity" on the
+            // destination resource.  If the Overwrite header is set to
+            // "F" then the operation will fail.
+
+            aSourceAccess.COPY( sourceURI.GetPath(),
+                                targetURI.GetURI(),
+                                rArgs.NameClash
+                                    == ucb::NameClash::OVERWRITE,
+                                Environment );
+
+// DAV resources store all additional props on server!
+//              // Copy own and all children's Additional Core Properties.
+//              copyAdditionalPropertySet( xId->getContentIdentifier(),
+//                                         xTargetId->getContentIdentifier(),
+//                                         true );
+        }
+
+        // Note: The static cast is okay here, because its sure that
+        //       xProvider is always the WebDAVContentProvider.
+        rtl::Reference< Content > xTarget
+            = static_cast< Content * >(
+                    xProvider->queryContent( xTargetId ).get() );
+
+        // Announce transferred content in its new folder.
+        xTarget->inserted();
+    }
+    catch ( ucb::IllegalIdentifierException const & )
+    {
+        // queryContent
+    }
+    catch ( DAVException const & e )
+    {
+        // [RFC 2518] - WebDAV
+        // 412 (Precondition Failed) - The server was unable to maintain
+        // the liveness of the properties listed in the propertybehavior
+        // XML element or the Overwrite header is "F" and the state of
+        // the destination resource is non-null.
+
+        if ( e.getStatus() == SC_PRECONDITION_FAILED )
+        {
+            switch ( rArgs.NameClash )
+            {
+                case 0/*ucb::NameClash::ERROR*/:
+                {
+                    ucbhelper::cancelCommandExecution(
+                        uno::makeAny(
+                            ucb::NameClashException(
+                                OUString(),
+                                static_cast< cppu::OWeakObject * >( this ),
+                                task::InteractionClassification_ERROR,
+                                aTargetURI ) ),
+                        Environment );
+                    // Unreachable
+                }
+                [[fallthrough]];
+
+                case ucb::NameClash::OVERWRITE:
+                    break;
+
+                case ucb::NameClash::KEEP: // deprecated
+                case ucb::NameClash::RENAME:
+                case ucb::NameClash::ASK:
+                default:
+                {
+                    ucbhelper::cancelCommandExecution(
+                        uno::makeAny(
+                            ucb::UnsupportedNameClashException(
+                                OUString(),
+                                static_cast< cppu::OWeakObject * >( this ),
+                                rArgs.NameClash ) ),
+                        Environment );
+                    // Unreachable
+                }
+            }
+        }
+
+        cancelCommandExecution( e, Environment, true );
+        // Unreachable
+    }
+
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+        m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+    }
+}
+
+
+void Content::destroy( bool bDeletePhysical )
+{
+    // @@@ take care about bDeletePhysical -> trashcan support
+
+    uno::Reference< ucb::XContent > xThis = this;
+
+    deleted();
+
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    // Process instantiated children...
+
+    ::http_dav_ucp::Content::ContentRefList aChildren;
+    queryChildren( aChildren );
+
+    for ( auto& rChild : aChildren )
+    {
+        rChild->destroy( bDeletePhysical );
+    }
+}
+
+
+bool Content::supportsExclusiveWriteLock(
+  const uno::Reference< ucb::XCommandEnvironment >& Environment )
+{
+    if ( getResourceType( Environment ) == DAV )
+    {
+        if ( m_xCachedProps.get() )
+        {
+            uno::Sequence< ucb::LockEntry > aSupportedLocks;
+            if ( m_xCachedProps->getValue( DAVProperties::SUPPORTEDLOCK )
+                >>= aSupportedLocks )
+            {
+                for ( sal_Int32 n = 0; n < aSupportedLocks.getLength(); ++n )
+                {
+                    if ( aSupportedLocks[ n ].Scope
+                            == ucb::LockScope_EXCLUSIVE &&
+                         aSupportedLocks[ n ].Type
+                            == ucb::LockType_WRITE )
+                        return true;
+                }
+            }
+        }
+    }
+    return false;
+}
+
+
+void Content::lock(
+        const uno::Reference< ucb::XCommandEnvironment >& Environment )
+{
+    try
+    {
+        std::unique_ptr< DAVResourceAccess > xResAccess;
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+        }
+
+        uno::Any aOwnerAny;
+        aOwnerAny <<= OUString( "http://ucb.openoffice.org" );
+
+        ucb::Lock aLock(
+            ucb::LockScope_EXCLUSIVE,
+            ucb::LockType_WRITE,
+            ucb::LockDepth_ZERO,
+            aOwnerAny,
+            180, // lock timeout in secs
+            //-1, // infinite lock
+            uno::Sequence< OUString >() );
+
+        xResAccess->LOCK( aLock, Environment );
+        m_bLocked = true;
+
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+        }
+    }
+    catch ( DAVException const & e )
+    {
+        cancelCommandExecution( e, Environment, false );
+        // Unreachable
+    }
+}
+
+
+void Content::unlock(
+        const uno::Reference< ucb::XCommandEnvironment >& Environment )
+{
+    try
+    {
+        std::unique_ptr< DAVResourceAccess > xResAccess;
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+        }
+
+        xResAccess->UNLOCK( Environment );
+        m_bLocked = false;
+
+        {
+            osl::Guard< osl::Mutex > aGuard( m_aMutex );
+            m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+        }
+    }
+    catch ( DAVException const & e )
+    {
+        cancelCommandExecution( e, Environment, false );
+        // Unreachable
+    }
+}
+
+
+bool Content::exchangeIdentity(
+    const uno::Reference< ucb::XContentIdentifier >& xNewId )
+{
+    if ( !xNewId.is() )
+        return false;
+
+    osl::ClearableGuard< osl::Mutex > aGuard( m_aMutex );
+
+    uno::Reference< ucb::XContent > xThis = this;
+
+    // Already persistent?
+    if ( m_bTransient )
+    {
+        SAL_WARN( "ucb.ucp.webdav", "Content::exchangeIdentity - Not persistent!" );
+        return false;
+    }
+
+    // Exchange own identitity.
+
+    // Fail, if a content with given id already exists.
+//  if ( !hasData( xNewId ) )
+    {
+        OUString aOldURL = m_xIdentifier->getContentIdentifier();
+
+        aGuard.clear();
+        if ( exchange( xNewId ) )
+        {
+            // Process instantiated children...
+
+            ContentRefList aChildren;
+            queryChildren( aChildren );
+
+            for ( const auto& rChild : aChildren )
+            {
+                ContentRef xChild = rChild;
+
+                // Create new content identifier for the child...
+                uno::Reference< ucb::XContentIdentifier >
+                    xOldChildId = xChild->getIdentifier();
+                OUString aOldChildURL
+                    = xOldChildId->getContentIdentifier();
+                OUString aNewChildURL
+                    = aOldChildURL.replaceAt(
+                        0,
+                        aOldURL.getLength(),
+                        xNewId->getContentIdentifier() );
+                uno::Reference< ucb::XContentIdentifier > xNewChildId
+                    = new ::ucbhelper::ContentIdentifier( aNewChildURL );
+
+                if ( !xChild->exchangeIdentity( xNewChildId ) )
+                    return false;
+            }
+            return true;
+        }
+    }
+
+    SAL_WARN( "ucb.ucp.webdav",
+                "Content::exchangeIdentity - "
+                "Panic! Cannot exchange identity!" );
+    return false;
+}
+
+
+bool Content::isFolder(
+            const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+    {
+        osl::MutexGuard aGuard( m_aMutex );
+
+        if ( m_bTransient )
+            return m_bCollection;
+    }
+
+    uno::Sequence< beans::Property > aProperties( 1 );
+    aProperties[ 0 ].Name   = "IsFolder";
+    aProperties[ 0 ].Handle = -1;
+    uno::Reference< sdbc::XRow > xRow( getPropertyValues( aProperties, xEnv ) );
+    if ( xRow.is() )
+    {
+        try
+        {
+            return xRow->getBoolean( 1 );
+        }
+        catch ( sdbc::SQLException const & )
+        {
+        }
+    }
+
+    return false;
+}
+
+
+uno::Any Content::MapDAVException( const DAVException & e, bool bWrite )
+{
+    // Map DAVException...
+    uno::Any aException;
+
+    OUString aURL;
+    if ( m_bTransient )
+    {
+        aURL = getParentURL();
+        if ( aURL.lastIndexOf( '/' ) != ( aURL.getLength() - 1 ) )
+            aURL += "/";
+
+        aURL += m_aEscapedTitle;
+    }
+    else
+    {
+        aURL = m_xIdentifier->getContentIdentifier();
+    }
+
+    switch ( e.getStatus() )
+    {
+        case SC_NOT_FOUND:
+        {
+            uno::Sequence< uno::Any > aArgs( 1 );
+            aArgs[ 0 ] <<= beans::PropertyValue(
+                "Uri", -1,
+                uno::makeAny(aURL),
+                beans::PropertyState_DIRECT_VALUE);
+
+            aException <<=
+                ucb::InteractiveAugmentedIOException(
+                    "Not found!",
+                    static_cast< cppu::OWeakObject * >( this ),
+                    task::InteractionClassification_ERROR,
+                    ucb::IOErrorCode_NOT_EXISTING,
+                    aArgs );
+            return aException;
+        }
+        default:
+            break;
+    }
+
+    switch ( e.getError() )
+    {
+    case DAVException::DAV_HTTP_ERROR:
+        {
+            if ( bWrite )
+                aException <<=
+                    ucb::InteractiveNetworkWriteException(
+                        e.getData(),
+                        static_cast< cppu::OWeakObject * >( this ),
+                        task::InteractionClassification_ERROR,
+                        e.getData() );
+            else
+                aException <<=
+                    ucb::InteractiveNetworkReadException(
+                        e.getData(),
+                        static_cast< cppu::OWeakObject * >( this ),
+                        task::InteractionClassification_ERROR,
+                        e.getData() );
+            break;
+        }
+
+    case DAVException::DAV_HTTP_LOOKUP:
+        aException <<=
+            ucb::InteractiveNetworkResolveNameException(
+                OUString(),
+                static_cast< cppu::OWeakObject * >( this ),
+                task::InteractionClassification_ERROR,
+                e.getData() );
+        break;
+
+// @@@ No matching InteractiveNetwork*Exception
+//    case DAVException::DAV_HTTP_AUTH:
+//        break;
+
+// @@@ No matching InteractiveNetwork*Exception
+//    case DAVException::DAV_HTTP_AUTHPROXY:
+//        break;
+
+    case DAVException::DAV_HTTP_CONNECT:
+        aException <<=
+            ucb::InteractiveNetworkConnectException(
+                OUString(),
+                static_cast< cppu::OWeakObject * >( this ),
+                task::InteractionClassification_ERROR,
+                e.getData() );
+        break;
+
+// @@@ No matching InteractiveNetwork*Exception
+//    case DAVException::DAV_HTTP_TIMEOUT:
+//        break;
+
+// @@@ No matching InteractiveNetwork*Exception
+//     case DAVException::DAV_HTTP_REDIRECT:
+//         break;
+
+// @@@ No matching InteractiveNetwork*Exception
+//     case DAVException::DAV_SESSION_CREATE:
+//         break;
+
+    case DAVException::DAV_INVALID_ARG:
+        aException <<=
+            lang::IllegalArgumentException(
+                OUString(),
+                static_cast< cppu::OWeakObject * >( this ),
+                -1 );
+        break;
+
+    case DAVException::DAV_LOCKED:
+#if 1
+        aException <<=
+            ucb::InteractiveLockingLockedException(
+                "Locked!",
+                static_cast< cppu::OWeakObject * >( this ),
+                task::InteractionClassification_ERROR,
+                aURL,
+                false ); // not SelfOwned
+#else
+        {
+            uno::Sequence< uno::Any > aArgs( 1 );
+            aArgs[ 0 ] <<= beans::PropertyValue(
+                OUString("Uri"), -1,
+                uno::makeAny(aURL),
+                beans::PropertyState_DIRECT_VALUE);
+
+            aException <<=
+                ucb::InteractiveAugmentedIOException(
+                    OUString( "Locked!" ),
+                    static_cast< cppu::OWeakObject * >( this ),
+                    task::InteractionClassification_ERROR,
+                    ucb::IOErrorCode_LOCKING_VIOLATION,
+                    aArgs );
+        }
+#endif
+        break;
+
+    case DAVException::DAV_LOCKED_SELF:
+        aException <<=
+            ucb::InteractiveLockingLockedException(
+                "Locked (self)!",
+                static_cast< cppu::OWeakObject * >( this ),
+                task::InteractionClassification_ERROR,
+                aURL,
+                true ); // SelfOwned
+        break;
+
+    case DAVException::DAV_NOT_LOCKED:
+        aException <<=
+            ucb::InteractiveLockingNotLockedException(
+                "Not locked!",
+                static_cast< cppu::OWeakObject * >( this ),
+                task::InteractionClassification_ERROR,
+                aURL );
+        break;
+
+    case DAVException::DAV_LOCK_EXPIRED:
+        aException <<=
+            ucb::InteractiveLockingLockExpiredException(
+                "Lock expired!",
+                static_cast< cppu::OWeakObject * >( this ),
+                task::InteractionClassification_ERROR,
+                aURL );
+        break;
+
+    default:
+        aException <<=
+            ucb::InteractiveNetworkGeneralException(
+                OUString(),
+                static_cast< cppu::OWeakObject * >( this ),
+                task::InteractionClassification_ERROR );
+        break;
+    }
+
+    return aException;
+}
+
+
+// static
+bool Content::shouldAccessNetworkAfterException( const DAVException & e )
+{
+    if ( ( e.getStatus() == SC_NOT_FOUND ) ||
+         ( e.getError() == DAVException::DAV_HTTP_LOOKUP ) ||
+         ( e.getError() == DAVException::DAV_HTTP_CONNECT ) ||
+         ( e.getError() == DAVException::DAV_HTTP_AUTH ) ||
+         ( e.getError() == DAVException::DAV_HTTP_AUTHPROXY ) )
+        return false;
+
+    return true;
+}
+
+
+void Content::cancelCommandExecution(
+                const DAVException & e,
+                const uno::Reference< ucb::XCommandEnvironment > & xEnv,
+                bool bWrite /* = false */ )
+{
+    ucbhelper::cancelCommandExecution( MapDAVException( e, bWrite ), xEnv );
+    // Unreachable
+}
+
+
+OUString
+Content::getBaseURI( const std::unique_ptr< DAVResourceAccess > & rResAccess )
+{
+    osl::Guard< osl::Mutex > aGuard( m_aMutex );
+
+    // First, try to obtain value of response header "Content-Location".
+    if ( m_xCachedProps.get() )
+    {
+        OUString aLocation;
+        m_xCachedProps->getValue( "Content-Location" ) >>= aLocation;
+        if ( aLocation.getLength() )
+        {
+            try
+            {
+                // Do not use m_xIdentifier->getContentIdentifier() because it
+                // for example does not reflect redirects applied to requests
+                // done using the original URI but m_xResAccess' URI does.
+                return rtl::Uri::convertRelToAbs( rResAccess->getURL(),
+                                                  aLocation );
+            }
+            catch ( rtl::MalformedUriException const & )
+            {
+            }
+        }
+    }
+
+    return rResAccess->getURL();
+}
+
+
+Content::ResourceType Content::getResourceType(
+                    const uno::Reference< ucb::XCommandEnvironment >& xEnv,
+                    const std::unique_ptr< DAVResourceAccess > & rResAccess,
+                    bool * networkAccessAllowed )
+{
+    {
+        osl::MutexGuard g(m_aMutex);
+        if (m_eResourceType != UNKNOWN) {
+            return m_eResourceType;
+        }
+    }
+
+    ResourceType eResourceType = UNKNOWN;
+
+    try
+    {
+        // Try to fetch some frequently used property value, e.g. those
+        // used when loading documents... along with identifying whether
+        // this is a DAV resource.
+        std::vector< DAVResource > resources;
+        std::vector< OUString > aPropNames;
+        uno::Sequence< beans::Property > aProperties( 5 );
+        aProperties[ 0 ].Name = "IsFolder";
+        aProperties[ 1 ].Name = "IsDocument";
+        aProperties[ 2 ].Name = "IsReadOnly";
+        aProperties[ 3 ].Name = "MediaType";
+        aProperties[ 4 ].Name = DAVProperties::SUPPORTEDLOCK;
+
+        ContentProperties::UCBNamesToDAVNames(
+            aProperties, aPropNames );
+
+        rResAccess->PROPFIND(
+            DAVZERO, aPropNames, resources, xEnv );
+
+        // TODO - is this really only one?
+        if ( resources.size() == 1 )
+        {
+            osl::MutexGuard g(m_aMutex);
+            m_xCachedProps.reset(
+                new CachableContentProperties( ContentProperties( resources[ 0 ] ) ) );
+            m_xCachedProps->containsAllNames(
+                aProperties, m_aFailedPropNames );
+        }
+
+        eResourceType = DAV;
+    }
+    catch ( DAVException const & e )
+    {
+        rResAccess->resetUri();
+
+        if ( e.getStatus() == SC_METHOD_NOT_ALLOWED )
+        {
+            // Status SC_METHOD_NOT_ALLOWED is a safe indicator that the
+            // resource is NON_DAV
+            eResourceType = NON_DAV;
+        }
+        else if (networkAccessAllowed != nullptr)
+        {
+            *networkAccessAllowed = *networkAccessAllowed
+                && shouldAccessNetworkAfterException(e);
+        }
+
+        // cancel command execution is case that no user authentication data has been provided.
+        if ( e.getError() == DAVException::DAV_HTTP_NOAUTH )
+        {
+            cancelCommandExecution( e, uno::Reference< ucb::XCommandEnvironment >() );
+        }
+    }
+
+    osl::MutexGuard g(m_aMutex);
+    if (m_eResourceType == UNKNOWN) {
+        m_eResourceType = eResourceType;
+    } else {
+        SAL_WARN_IF(
+            eResourceType != m_eResourceType, "ucb.ucp.webdav",
+            "different resource types for <" << rResAccess->getURL() << ">: "
+            << +eResourceType << " vs. " << +m_eResourceType);
+    }
+    return m_eResourceType;
+}
+
+
+Content::ResourceType Content::getResourceType(
+                    const uno::Reference< ucb::XCommandEnvironment >& xEnv )
+{
+    std::unique_ptr< DAVResourceAccess > xResAccess;
+    {
+        osl::MutexGuard aGuard( m_aMutex );
+        xResAccess.reset( new DAVResourceAccess( *m_xResAccess ) );
+    }
+    const Content::ResourceType & ret = getResourceType( xEnv, xResAccess );
+    {
+        osl::Guard< osl::Mutex > aGuard( m_aMutex );
+        m_xResAccess.reset( new DAVResourceAccess( *xResAccess ) );
+    }
+    return ret;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */