Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

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

1 files changed, 755 insertions, 0 deletions

diff --git a/extensions/source/update/feed/updatefeed.cxx b/extensions/source/update/feed/updatefeed.cxx
new file mode 100644
index 000000000..ee83c3f9b
--- /dev/null
+++ b/extensions/source/update/feed/updatefeed.cxx
@@ -0,0 +1,755 @@
+/* -*- 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 <sal/config.h>
+
+#include <string_view>
+
+#include <config_folders.h>
+
+#include <cppuhelper/exc_hlp.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/supportsservice.hxx>
+#include <comphelper/sequence.hxx>
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+#include <com/sun/star/configuration/theDefaultProvider.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/deployment/UpdateInformationEntry.hpp>
+#include <com/sun/star/deployment/XUpdateInformationProvider.hpp>
+#include <com/sun/star/io/XActiveDataSink.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/ucb/CommandAbortedException.hpp>
+#include <com/sun/star/ucb/UniversalContentBroker.hpp>
+#include <com/sun/star/ucb/XWebDAVCommandEnvironment.hpp>
+#include <com/sun/star/ucb/XCommandProcessor2.hpp>
+#include <com/sun/star/ucb/OpenCommandArgument3.hpp>
+#include <com/sun/star/ucb/OpenMode.hpp>
+#include <com/sun/star/task/PasswordContainerInteractionHandler.hpp>
+#include <com/sun/star/xml/dom/DocumentBuilder.hpp>
+#include <com/sun/star/xml/xpath/XPathAPI.hpp>
+#include <com/sun/star/xml/xpath/XPathException.hpp>
+#include <rtl/ref.hxx>
+#include <rtl/bootstrap.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+#include <osl/diagnose.h>
+#include <osl/conditn.hxx>
+#include <vcl/svapp.hxx>
+
+namespace beans = com::sun::star::beans ;
+namespace container = com::sun::star::container ;
+namespace deployment = com::sun::star::deployment ;
+namespace io = com::sun::star::io ;
+namespace lang = com::sun::star::lang ;
+namespace task = com::sun::star::task ;
+namespace ucb = com::sun::star::ucb ;
+namespace uno = com::sun::star::uno ;
+namespace xml = com::sun::star::xml ;
+
+
+namespace
+{
+
+#ifdef DEBUG
+
+class InputStreamWrapper : public ::cppu::WeakImplHelper< io::XInputStream >
+{
+    uno::Reference< io::XInputStream > m_xStream;
+
+public:
+    explicit InputStreamWrapper(const uno::Reference< io::XInputStream >& rxStream) :
+        m_xStream(rxStream) {};
+
+    virtual sal_Int32 SAL_CALL readBytes(uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead)
+        {
+            sal_Int32 n = m_xStream->readBytes(aData, nBytesToRead);
+            return n;
+        };
+    virtual sal_Int32 SAL_CALL readSomeBytes(uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead)
+        {
+            sal_Int32 n = m_xStream->readSomeBytes(aData, nMaxBytesToRead);
+            return n;
+        };
+    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
+        { m_xStream->skipBytes(nBytesToSkip); };
+    virtual sal_Int32 SAL_CALL available()
+        { return m_xStream->available(); };
+    virtual void SAL_CALL closeInput( )
+        {};
+};
+
+#define INPUT_STREAM(i) new InputStreamWrapper(i)
+#else
+#define INPUT_STREAM(i) i
+#endif
+
+
+class ActiveDataSink : public ::cppu::WeakImplHelper< io::XActiveDataSink >
+{
+    uno::Reference< io::XInputStream > m_xStream;
+
+public:
+    ActiveDataSink() {};
+
+    virtual uno::Reference< io::XInputStream > SAL_CALL getInputStream() override { return m_xStream; };
+    virtual void SAL_CALL setInputStream( uno::Reference< io::XInputStream > const & rStream ) override { m_xStream = rStream; };
+};
+
+
+class UpdateInformationProvider :
+    public ::cppu::WeakImplHelper< deployment::XUpdateInformationProvider,
+                                    ucb::XWebDAVCommandEnvironment,
+                                    lang::XServiceInfo >
+{
+    OUString getUserAgent(bool bExtended);
+    bool isUserAgentExtended() const;
+public:
+    uno::Reference< xml::dom::XElement > getDocumentRoot(const uno::Reference< xml::dom::XNode >& rxNode);
+    uno::Reference< xml::dom::XNode > getChildNode(const uno::Reference< xml::dom::XNode >& rxNode, std::u16string_view rName);
+
+
+    // XUpdateInformationService
+    virtual uno::Sequence< uno::Reference< xml::dom::XElement > > SAL_CALL
+    getUpdateInformation(
+        uno::Sequence< OUString > const & repositories,
+        OUString const & extensionId
+    ) override;
+
+    virtual void SAL_CALL cancel() override;
+
+    virtual void SAL_CALL setInteractionHandler(
+        uno::Reference< task::XInteractionHandler > const & handler ) override;
+
+    virtual uno::Reference< container::XEnumeration > SAL_CALL
+    getUpdateInformationEnumeration(
+        uno::Sequence< OUString > const & repositories,
+        OUString const & extensionId
+    ) override;
+
+    // XCommandEnvironment
+    virtual uno::Reference< task::XInteractionHandler > SAL_CALL getInteractionHandler() override;
+
+    virtual uno::Reference< ucb::XProgressHandler > SAL_CALL getProgressHandler() override { return  uno::Reference< ucb::XProgressHandler >(); };
+
+    // XWebDAVCommandEnvironment
+    virtual uno::Sequence< beans::StringPair > SAL_CALL getUserRequestHeaders(
+        const OUString&,  ucb::WebDAVHTTPMethod ) override;
+
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(OUString const & serviceName) override;
+    virtual uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+
+    UpdateInformationProvider(const uno::Reference<uno::XComponentContext>& xContext,
+                              const uno::Reference< ucb::XUniversalContentBroker >& xUniversalContentBroker,
+                              const uno::Reference< xml::dom::XDocumentBuilder >& xDocumentBuilder,
+                              const uno::Reference< xml::xpath::XXPathAPI >& xXPathAPI);
+
+protected:
+
+    virtual ~UpdateInformationProvider() override;
+    static OUString getConfigurationItem(uno::Reference<lang::XMultiServiceFactory> const & configurationProvider, OUString const & node, OUString const & item);
+    static uno::Any getConfigurationItemAny(uno::Reference<lang::XMultiServiceFactory> const & configurationProvider, OUString const & node, OUString const & item);
+
+private:
+    uno::Reference< io::XInputStream > load(const OUString& rURL);
+
+    void storeCommandInfo( sal_Int32 nCommandId,
+        uno::Reference< ucb::XCommandProcessor > const & rxCommandProcessor);
+
+    const uno::Reference< uno::XComponentContext> m_xContext;
+
+    const uno::Reference< ucb::XUniversalContentBroker > m_xUniversalContentBroker;
+    const uno::Reference< xml::dom::XDocumentBuilder > m_xDocumentBuilder;
+    const uno::Reference< xml::xpath::XXPathAPI > m_xXPathAPI;
+
+    uno::Sequence< beans::StringPair > m_aRequestHeaderList;
+
+    uno::Reference< ucb::XCommandProcessor > m_xCommandProcessor;
+    uno::Reference< task::XInteractionHandler > m_xInteractionHandler;
+    uno::Reference< task::XInteractionHandler > m_xPwContainerInteractionHandler;
+
+    osl::Mutex m_aMutex;
+    osl::Condition m_bCancelled;
+
+    sal_Int32 m_nCommandId;
+};
+
+
+class UpdateInformationEnumeration : public ::cppu::WeakImplHelper< container::XEnumeration >
+{
+public:
+    UpdateInformationEnumeration(const uno::Reference< xml::dom::XNodeList >& xNodeList,
+                                 const rtl::Reference< UpdateInformationProvider >& xUpdateInformationProvider) :
+        m_xUpdateInformationProvider(xUpdateInformationProvider),
+        m_xNodeList(xNodeList),
+        m_nNodes(xNodeList.is() ? xNodeList->getLength() : 0),
+        m_nCount(0)
+    {
+    };
+
+    // XEnumeration
+    sal_Bool SAL_CALL hasMoreElements() override { return m_nCount < m_nNodes; };
+    uno::Any SAL_CALL nextElement() override
+    {
+        OSL_ASSERT( m_xNodeList.is() );
+        OSL_ASSERT( m_xUpdateInformationProvider.is() );
+
+        if( m_nCount >= m_nNodes )
+            throw container::NoSuchElementException(OUString::number(m_nCount), *this);
+
+        try
+        {
+            deployment::UpdateInformationEntry aEntry;
+
+            uno::Reference< xml::dom::XNode > xAtomEntryNode( m_xNodeList->item(m_nCount++) );
+
+            uno::Reference< xml::dom::XNode > xSummaryNode(
+                m_xUpdateInformationProvider->getChildNode( xAtomEntryNode, u"summary/text()" )
+            );
+
+            if( xSummaryNode.is() )
+                aEntry.Description = xSummaryNode->getNodeValue();
+
+            uno::Reference< xml::dom::XNode > xContentNode(
+                m_xUpdateInformationProvider->getChildNode( xAtomEntryNode, u"content" ) );
+
+            if( xContentNode.is() )
+                aEntry.UpdateDocument = m_xUpdateInformationProvider->getDocumentRoot(xContentNode);
+
+            return uno::Any(aEntry);
+        }
+        catch( ucb::CommandAbortedException const &)
+        {
+            // action has been aborted
+            css::uno::Any anyEx = cppu::getCaughtException();
+            throw lang::WrappedTargetException( "Command aborted", *this, anyEx );
+        }
+        catch( uno::RuntimeException const & )
+        {
+            // let runtime exception pass
+            throw;
+        }
+        catch( uno::Exception const &)
+        {
+            // document not accessible
+            css::uno::Any anyEx = cppu::getCaughtException();
+            throw lang::WrappedTargetException( "Document not accessible", *this, anyEx );
+        }
+    }
+
+private:
+    const rtl::Reference< UpdateInformationProvider > m_xUpdateInformationProvider;
+    const uno::Reference< xml::dom::XNodeList > m_xNodeList;
+    const sal_Int32 m_nNodes;
+    sal_Int32 m_nCount;
+};
+
+
+class SingleUpdateInformationEnumeration : public ::cppu::WeakImplHelper< container::XEnumeration >
+{
+public:
+    explicit SingleUpdateInformationEnumeration(const uno::Reference< xml::dom::XElement >& xElement)
+        : m_nCount(0) { m_aEntry.UpdateDocument = xElement; };
+
+    // XEnumeration
+    sal_Bool SAL_CALL hasMoreElements() override { return 0 == m_nCount; };
+    uno::Any SAL_CALL nextElement() override
+    {
+        if( m_nCount > 0 )
+            throw container::NoSuchElementException(OUString::number(m_nCount), *this);
+
+        ++m_nCount;
+        return uno::Any(m_aEntry);
+    };
+
+private:
+    sal_Int32 m_nCount;
+    deployment::UpdateInformationEntry m_aEntry;
+};
+
+UpdateInformationProvider::UpdateInformationProvider(
+    const uno::Reference<uno::XComponentContext>& xContext,
+    const uno::Reference< ucb::XUniversalContentBroker >& xUniversalContentBroker,
+    const uno::Reference< xml::dom::XDocumentBuilder >& xDocumentBuilder,
+    const uno::Reference< xml::xpath::XXPathAPI >& xXPathAPI)
+    : m_xContext(xContext)
+    , m_xUniversalContentBroker(xUniversalContentBroker)
+    , m_xDocumentBuilder(xDocumentBuilder)
+    , m_xXPathAPI(xXPathAPI)
+    , m_aRequestHeaderList(2)
+    , m_nCommandId(0)
+{
+    uno::Reference< lang::XMultiServiceFactory > xConfigurationProvider(
+        css::configuration::theDefaultProvider::get(m_xContext));
+
+    auto pRequestHeaderList = m_aRequestHeaderList.getArray();
+    pRequestHeaderList[0].First = "Accept-Language";
+    pRequestHeaderList[0].Second = getConfigurationItem( xConfigurationProvider, "org.openoffice.Setup/L10N", "ooLocale" );
+}
+
+bool
+UpdateInformationProvider::isUserAgentExtended() const
+{
+    bool bExtendedUserAgent = false;
+    try {
+        uno::Reference< lang::XMultiServiceFactory > xConfigurationProvider(
+            css::configuration::theDefaultProvider::get(m_xContext));
+
+        uno::Any aExtended = getConfigurationItemAny(
+            xConfigurationProvider,
+            "org.openoffice.Office.Jobs/Jobs/UpdateCheck/Arguments",
+            "ExtendedUserAgent");
+        aExtended >>= bExtendedUserAgent;
+    } catch (const uno::RuntimeException &) {
+        SAL_WARN("extensions.update", "Online update disabled");
+    }
+    return bExtendedUserAgent;
+}
+
+OUString UpdateInformationProvider::getUserAgent(bool bExtended)
+{
+    uno::Reference< lang::XMultiServiceFactory > xConfigurationProvider(
+        css::configuration::theDefaultProvider::get(m_xContext));
+
+    OUStringBuffer buf;
+    buf.append(
+        getConfigurationItem(
+            xConfigurationProvider,
+            "org.openoffice.Setup/Product",
+            "ooName"));
+    buf.append(' ');
+    buf.append(
+        getConfigurationItem(
+            xConfigurationProvider,
+            "org.openoffice.Setup/Product",
+            "ooSetupVersion"));
+
+    OUString extension(
+        getConfigurationItem(
+            xConfigurationProvider,
+            "org.openoffice.Setup/Product",
+            "ooSetupExtension"));
+    if (!extension.isEmpty())
+        buf.append(extension);
+
+    OUString product(buf.makeStringAndClear());
+
+    OUString aUserAgent( "${$BRAND_BASE_DIR/" LIBO_ETC_FOLDER "/" SAL_CONFIGFILE("version") ":UpdateUserAgent}" );
+    OUString aExtended;
+    if( bExtended )
+    {
+        aExtended = Application::GetHWOSConfInfo();
+    }
+    rtl::Bootstrap::expandMacros( aUserAgent );
+    aUserAgent = aUserAgent.replaceAll("<PRODUCT>", product);
+    aUserAgent = aUserAgent.replaceAll("<OPTIONAL_OS_HW_DATA>", aExtended);
+    SAL_INFO("extensions.update", "UpdateUserAgent: " << aUserAgent);
+
+    return aUserAgent;
+}
+
+uno::Sequence< beans::StringPair > SAL_CALL UpdateInformationProvider::getUserRequestHeaders(
+    const OUString &aURL, ucb::WebDAVHTTPMethod )
+{
+    bool bExtendedUserAgent;
+    uno::Sequence< beans::StringPair > aPair = m_aRequestHeaderList;
+
+    // Internal use from cui/ some magic URLs
+    if( aURL.startsWith( "useragent:" ) )
+        bExtendedUserAgent = (aURL == "useragent:extended");
+    else
+        bExtendedUserAgent = isUserAgentExtended();
+
+    OUString aUserAgent = getUserAgent(bExtendedUserAgent);
+
+    if( aUserAgent.isEmpty() )
+        aPair.realloc(1);
+    else
+    {
+        auto pPair = aPair.getArray();
+        pPair[1].First = "User-Agent";
+        pPair[1].Second = aUserAgent;
+    }
+
+    return aPair;
+};
+
+UpdateInformationProvider::~UpdateInformationProvider()
+{
+}
+
+uno::Any
+UpdateInformationProvider::getConfigurationItemAny(uno::Reference<lang::XMultiServiceFactory> const & configurationProvider, OUString const & node, OUString const & item)
+{
+    beans::PropertyValue aProperty;
+    aProperty.Name  = "nodepath";
+    aProperty.Value <<= node;
+
+    uno::Sequence< uno::Any > aArgumentList{ uno::Any(aProperty) };
+    uno::Reference< container::XNameAccess > xNameAccess(
+        configurationProvider->createInstanceWithArguments(
+            "com.sun.star.configuration.ConfigurationAccess",
+            aArgumentList ),
+        uno::UNO_QUERY_THROW);
+
+    return xNameAccess->getByName(item);
+}
+
+OUString
+UpdateInformationProvider::getConfigurationItem(uno::Reference<lang::XMultiServiceFactory> const & configurationProvider, OUString const & node, OUString const & item)
+{
+    OUString sRet;
+    getConfigurationItemAny(configurationProvider, node, item) >>= sRet;
+    return sRet;
+}
+
+void
+UpdateInformationProvider::storeCommandInfo(
+    sal_Int32 nCommandId,
+    uno::Reference< ucb::XCommandProcessor > const & rxCommandProcessor)
+{
+    osl::MutexGuard aGuard(m_aMutex);
+
+    m_nCommandId = nCommandId;
+    m_xCommandProcessor = rxCommandProcessor;
+}
+
+uno::Reference< io::XInputStream >
+UpdateInformationProvider::load(const OUString& rURL)
+{
+    uno::Reference< ucb::XContentIdentifier > xId = m_xUniversalContentBroker->createContentIdentifier(rURL);
+
+    if( !xId.is() )
+        throw uno::RuntimeException(
+            "unable to obtain universal content id", *this);
+
+    uno::Reference< ucb::XCommandProcessor > xCommandProcessor(m_xUniversalContentBroker->queryContent(xId), uno::UNO_QUERY_THROW);
+    rtl::Reference< ActiveDataSink > aSink(new ActiveDataSink());
+
+    // Disable KeepAlive in webdav - don't want millions of office
+    // instances phone home & clog up servers
+    uno::Sequence< beans::NamedValue > aProps { { "KeepAlive", uno::Any(false) } };
+
+    ucb::OpenCommandArgument3 aOpenArgument;
+    aOpenArgument.Mode = ucb::OpenMode::DOCUMENT;
+    aOpenArgument.Priority = 32768;
+    aOpenArgument.Sink = *aSink;
+    aOpenArgument.OpeningFlags = aProps;
+
+    ucb::Command aCommand;
+    aCommand.Name = "open";
+    aCommand.Argument <<= aOpenArgument;
+
+    sal_Int32 nCommandId = xCommandProcessor->createCommandIdentifier();
+
+    storeCommandInfo(nCommandId, xCommandProcessor);
+    try
+    {
+        xCommandProcessor->execute(aCommand, nCommandId,
+            static_cast < XCommandEnvironment *> (this));
+    }
+    catch( const uno::Exception & /* e */ )
+    {
+        storeCommandInfo(0, uno::Reference< ucb::XCommandProcessor > ());
+
+        uno::Reference< ucb::XCommandProcessor2 > xCommandProcessor2(xCommandProcessor, uno::UNO_QUERY);
+        if( xCommandProcessor2.is() )
+            xCommandProcessor2->releaseCommandIdentifier(nCommandId);
+
+        throw;
+    }
+    storeCommandInfo(0, uno::Reference< ucb::XCommandProcessor > ());
+
+    uno::Reference< ucb::XCommandProcessor2 > xCommandProcessor2(xCommandProcessor, uno::UNO_QUERY);
+    if( xCommandProcessor2.is() )
+        xCommandProcessor2->releaseCommandIdentifier(nCommandId);
+
+    return INPUT_STREAM(aSink->getInputStream());
+}
+
+
+// TODO: docu content node
+
+uno::Reference< xml::dom::XElement >
+UpdateInformationProvider::getDocumentRoot(const uno::Reference< xml::dom::XNode >& rxNode)
+{
+    OSL_ASSERT(m_xDocumentBuilder.is());
+
+    uno::Reference< xml::dom::XElement > xElement(rxNode, uno::UNO_QUERY_THROW);
+
+    // load the document referenced in 'src' attribute ..
+    if( xElement->hasAttribute( "src" ) )
+    {
+        uno::Reference< xml::dom::XDocument > xUpdateXML =
+            m_xDocumentBuilder->parse(load(xElement->getAttribute( "src" )));
+
+        OSL_ASSERT( xUpdateXML.is() );
+
+        if( xUpdateXML.is() )
+            return xUpdateXML->getDocumentElement();
+    }
+    // .. or return the (single) child element
+    else
+    {
+        uno::Reference< xml::dom::XNodeList> xChildNodes = rxNode->getChildNodes();
+
+        // ignore possible #text nodes
+        sal_Int32 nmax = xChildNodes->getLength();
+        for(sal_Int32 n=0; n < nmax; n++)
+        {
+            uno::Reference< xml::dom::XElement > xChildElement(xChildNodes->item(n), uno::UNO_QUERY);
+            if( xChildElement.is() )
+            {
+                /* Copy the content to a dedicated document since XXPathAPI->selectNodeList
+                 * seems to evaluate expression always relative to the root node.
+                 */
+                uno::Reference< xml::dom::XDocument > xUpdateXML = m_xDocumentBuilder->newDocument();
+                xUpdateXML->appendChild( xUpdateXML->importNode(xChildElement, true ) );
+                return xUpdateXML->getDocumentElement();
+            }
+        }
+    }
+
+    return uno::Reference< xml::dom::XElement > ();
+}
+
+
+uno::Reference< xml::dom::XNode >
+UpdateInformationProvider::getChildNode(const uno::Reference< xml::dom::XNode >& rxNode,
+                                        std::u16string_view rName)
+{
+    OSL_ASSERT(m_xXPathAPI.is());
+    try {
+        return m_xXPathAPI->selectSingleNode(rxNode, OUString::Concat("./atom:") + rName);
+    } catch (const xml::xpath::XPathException &) {
+        // ignore
+        return nullptr;
+    }
+}
+
+
+uno::Reference< container::XEnumeration > SAL_CALL
+UpdateInformationProvider::getUpdateInformationEnumeration(
+    uno::Sequence< OUString > const & repositories,
+    OUString const & extensionId
+)
+{
+    OSL_ASSERT(m_xDocumentBuilder.is());
+
+    // reset cancelled flag
+    m_bCancelled.reset();
+
+    for(sal_Int32 n=0; n<repositories.getLength(); n++)
+    {
+        try
+        {
+            uno::Reference< xml::dom::XDocument > xDocument = m_xDocumentBuilder->parse(load(repositories[n]));
+            uno::Reference< xml::dom::XElement > xElement;
+
+            if( xDocument.is() )
+                xElement = xDocument->getDocumentElement();
+
+            if( xElement.is() )
+            {
+                if( xElement->getNodeName() == "feed" )
+                {
+                    OUString aXPathExpression;
+
+                    if( !extensionId.isEmpty() )
+                        aXPathExpression = "//atom:entry/atom:category[@term=\'" + extensionId + "\']/..";
+                    else
+                        aXPathExpression = "//atom:entry";
+
+                    uno::Reference< xml::dom::XNodeList > xNodeList;
+                    try {
+                        xNodeList = m_xXPathAPI->selectNodeList(xDocument,
+                            aXPathExpression);
+                    } catch (const xml::xpath::XPathException &) {
+                        // ignore
+                    }
+
+                    return new UpdateInformationEnumeration(xNodeList, this);
+                }
+                else
+                {
+                    return new SingleUpdateInformationEnumeration(xElement);
+                }
+            }
+
+            if( m_bCancelled.check() )
+                break;
+        }
+        catch( uno::RuntimeException const& /*e*/)
+        {
+            // #i118675# ignore runtime exceptions for now
+            // especially the "unsatisfied query for interface of
+            // type com.sun.star.ucb.XCommandProcessor!" exception
+        }
+
+        // rethrow only if last url in the list
+        catch( uno::Exception const & )
+        {
+            if( n+1 >= repositories.getLength() )
+                throw;
+        }
+    }
+
+    return uno::Reference< container::XEnumeration >();
+}
+
+
+uno::Sequence< uno::Reference< xml::dom::XElement > > SAL_CALL
+UpdateInformationProvider::getUpdateInformation(
+    uno::Sequence< OUString > const & repositories,
+    OUString const & extensionId
+)
+{
+    uno::Reference< container::XEnumeration > xEnumeration(
+        getUpdateInformationEnumeration(repositories, extensionId)
+    );
+
+    std::vector< uno::Reference< xml::dom::XElement > > aRet;
+
+    if( xEnumeration.is() )
+    {
+        while( xEnumeration->hasMoreElements() )
+        {
+            try
+            {
+                deployment::UpdateInformationEntry aEntry;
+                if( (xEnumeration->nextElement() >>= aEntry ) && aEntry.UpdateDocument.is() )
+                {
+                    aRet.push_back(aEntry.UpdateDocument);
+                }
+            }
+
+            catch( const lang::WrappedTargetException& e )
+            {
+                // command aborted, return what we have got so far
+                if( e.TargetException.isExtractableTo( ::cppu::UnoType< css::ucb::CommandAbortedException >::get() ) )
+                {
+                    break;
+                }
+
+                // ignore files that can't be loaded
+            }
+        }
+    }
+
+    return comphelper::containerToSequence(aRet);
+}
+
+
+void SAL_CALL
+UpdateInformationProvider::cancel()
+{
+    m_bCancelled.set();
+
+    osl::MutexGuard aGuard(m_aMutex);
+    if( m_xCommandProcessor.is() )
+        m_xCommandProcessor->abort(m_nCommandId);
+}
+
+
+void SAL_CALL
+UpdateInformationProvider::setInteractionHandler(
+        uno::Reference< task::XInteractionHandler > const & handler )
+{
+    osl::MutexGuard aGuard(m_aMutex);
+    m_xInteractionHandler = handler;
+}
+
+
+uno::Reference< task::XInteractionHandler > SAL_CALL
+UpdateInformationProvider::getInteractionHandler()
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    if ( m_xInteractionHandler.is() )
+        return m_xInteractionHandler;
+    else
+    {
+        try
+        {
+            // Supply an interaction handler that uses the password container
+            // service to obtain credentials without displaying a password gui.
+
+            if ( !m_xPwContainerInteractionHandler.is() )
+                m_xPwContainerInteractionHandler
+                    = task::PasswordContainerInteractionHandler::create(
+                        m_xContext );
+        }
+        catch ( uno::RuntimeException const & )
+        {
+            throw;
+        }
+        catch ( uno::Exception const & )
+        {
+        }
+        return m_xPwContainerInteractionHandler;
+    }
+}
+
+
+
+OUString SAL_CALL
+UpdateInformationProvider::getImplementationName()
+{
+    return "vnd.sun.UpdateInformationProvider";
+}
+
+
+uno::Sequence< OUString > SAL_CALL
+UpdateInformationProvider::getSupportedServiceNames()
+{
+    return { "com.sun.star.deployment.UpdateInformationProvider" };
+}
+
+sal_Bool SAL_CALL
+UpdateInformationProvider::supportsService( OUString const & serviceName )
+{
+    return cppu::supportsService(this, serviceName);
+}
+
+} // anonymous namespace
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+extensions_update_UpdateInformationProvider_get_implementation(
+    css::uno::XComponentContext* xContext , css::uno::Sequence<css::uno::Any> const&)
+{
+    uno::Reference< ucb::XUniversalContentBroker > xUniversalContentBroker =
+        ucb::UniversalContentBroker::create(xContext);
+
+    uno::Reference< xml::dom::XDocumentBuilder > xDocumentBuilder(
+        xml::dom::DocumentBuilder::create(xContext));
+
+    uno::Reference< xml::xpath::XXPathAPI > xXPath = xml::xpath::XPathAPI::create( xContext );
+
+    xXPath->registerNS( "atom", "http://www.w3.org/2005/Atom" );
+
+    return cppu::acquire(
+        new UpdateInformationProvider(xContext, xUniversalContentBroker, xDocumentBuilder, xXPath));
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */