1 files changed, 256 insertions, 0 deletions
diff --git a/ucb/source/ucp/webdav-curl/SerfLockStore.cxx b/ucb/source/ucp/webdav-curl/SerfLockStore.cxx
new file mode 100644
index 000000000..005e7c5f1
--- /dev/null
+++ b/ucb/source/ucp/webdav-curl/SerfLockStore.cxx
@@ -0,0 +1,256 @@
+/* -*- 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 <rtl/ustring.hxx>
+#include <sal/log.hxx>
+#include <osl/time.h>
+#include <osl/thread.hxx>
+#include <salhelper/thread.hxx>
+
+#include <com/sun/star/ucb/LockScope.hpp>
+
+#include "CurlSession.hxx"
+#include "SerfLockStore.hxx"
+
+using namespace http_dav_ucp;
+
+namespace http_dav_ucp {
+
+class TickerThread : public salhelper::Thread
+{
+    bool m_bFinish;
+    SerfLockStore & m_rLockStore;
+
+public:
+
+    explicit TickerThread( SerfLockStore & rLockStore )
+        : Thread( "WebDavTickerThread" ), m_bFinish( false ),
+          m_rLockStore( rLockStore ) {}
+
+    void finish() { m_bFinish = true; }
+
+private:
+
+    virtual void execute();
+};
+
+} // namespace http_dav_ucp
+
+
+void TickerThread::execute()
+{
+    osl_setThreadName("http_dav_ucp::TickerThread");
+
+    SAL_INFO("ucb.ucp.webdav",  "TickerThread: start." );
+
+    // we have to go through the loop more often to be able to finish ~quickly
+    const int nNth = 25;
+
+    int nCount = nNth;
+    while ( !m_bFinish )
+    {
+        if ( nCount-- <= 0 )
+        {
+            m_rLockStore.refreshLocks();
+            nCount = nNth;
+        }
+
+        TimeValue aTV;
+        aTV.Seconds = 0;
+        aTV.Nanosec = 1000000000 / nNth;
+        salhelper::Thread::wait( aTV );
+    }
+
+    SAL_INFO("ucb.ucp.webdav",  "TickerThread: stop." );
+}
+
+
+SerfLockStore::SerfLockStore()
+{
+}
+
+
+SerfLockStore::~SerfLockStore()
+{
+    std::unique_lock aGuard(m_aMutex);
+    stopTicker(aGuard);
+    aGuard.lock(); // actually no threads should even try to access members now
+
+    // release active locks, if any.
+    SAL_WARN_IF( !m_aLockInfoMap.empty(), "ucb.ucp.webdav",
+                "SerfLockStore::~SerfLockStore - Releasing active locks!" );
+
+    for ( auto& rLockInfo : m_aLockInfoMap )
+    {
+        rLockInfo.second.m_xSession->NonInteractive_UNLOCK(rLockInfo.first);
+    }
+}
+
+void SerfLockStore::startTicker()
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    if ( !m_pTickerThread.is() )
+    {
+        m_pTickerThread = new TickerThread( *this );
+        m_pTickerThread->launch();
+    }
+}
+
+
+void SerfLockStore::stopTicker(std::unique_lock<std::mutex> & rGuard)
+{
+    rtl::Reference<TickerThread> pTickerThread;
+
+    if (m_pTickerThread.is())
+    {
+        m_pTickerThread->finish(); // needs mutex
+        // the TickerThread may run refreshLocks() at most once after this
+        pTickerThread = m_pTickerThread;
+        m_pTickerThread.clear();
+    }
+
+    rGuard.unlock();
+
+    if (pTickerThread.is() && pTickerThread->getIdentifier() != osl::Thread::getCurrentIdentifier())
+    {
+        pTickerThread->join(); // without m_aMutex locked (to prevent deadlock)
+    }
+}
+
+OUString const*
+SerfLockStore::getLockTokenForURI(OUString const& rURI, css::ucb::Lock const*const pLock)
+{
+    assert(rURI.startsWith("http://") || rURI.startsWith("https://"));
+
+    std::unique_lock aGuard( m_aMutex );
+
+    auto const it(m_aLockInfoMap.find(rURI));
+
+    if (it == m_aLockInfoMap.end())
+    {
+        return nullptr;
+    }
+    if (!pLock) // any lock will do
+    {
+        return &it->second.m_sToken;
+    }
+    // 0: EXCLUSIVE 1: SHARED
+    if (it->second.m_Lock.Scope == ucb::LockScope_SHARED && pLock->Scope == ucb::LockScope_EXCLUSIVE)
+    {
+        return nullptr;
+    }
+    assert(it->second.m_Lock.Type == pLock->Type); // only WRITE possible
+    if (it->second.m_Lock.Depth < pLock->Depth)
+    {
+        return nullptr;
+    }
+    // Only own locks are expected in the lock store, but depending on the
+    // server it->second.m_Lock.Owner may contain the string this UCP passed in
+    // the LOCK request, or a user identifier generated by the server (happens
+    // with Sharepoint), so just ignore it here.
+    // ignore Timeout ?
+    return &it->second.m_sToken;
+}
+
+void SerfLockStore::addLock( const OUString& rURI,
+                             ucb::Lock const& rLock,
+                             const OUString& sToken,
+                             rtl::Reference<CurlSession> const & xSession,
+                             sal_Int32 nLastChanceToSendRefreshRequest )
+{
+    assert(rURI.startsWith("http://") || rURI.startsWith("https://"));
+    {
+        std::unique_lock aGuard( m_aMutex );
+
+        m_aLockInfoMap[ rURI ]
+            = LockInfo(sToken, rLock, xSession, nLastChanceToSendRefreshRequest);
+    }
+
+    startTicker();
+}
+
+
+void SerfLockStore::removeLock(const OUString& rURI)
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    removeLockImpl(aGuard, rURI);
+}
+
+void SerfLockStore::removeLockImpl(std::unique_lock<std::mutex> & rGuard, const OUString& rURI)
+{
+    assert(rURI.startsWith("http://") || rURI.startsWith("https://"));
+
+    m_aLockInfoMap.erase(rURI);
+
+    if ( m_aLockInfoMap.empty() )
+    {
+        stopTicker(rGuard);
+    }
+}
+
+void SerfLockStore::refreshLocks()
+{
+    std::unique_lock aGuard( m_aMutex );
+
+    ::std::vector<OUString> authFailedLocks;
+
+    for ( auto& rLockInfo : m_aLockInfoMap )
+    {
+        LockInfo & rInfo = rLockInfo.second;
+        if ( rInfo.m_nLastChanceToSendRefreshRequest != -1 )
+        {
+            // 30 seconds or less remaining until lock expires?
+            TimeValue t1;
+            osl_getSystemTime( &t1 );
+            if ( rInfo.m_nLastChanceToSendRefreshRequest - 30
+                     <= sal_Int32( t1.Seconds ) )
+            {
+                // refresh the lock.
+                sal_Int32 nlastChanceToSendRefreshRequest = -1;
+                bool isAuthFailed(false);
+                if (rInfo.m_xSession->NonInteractive_LOCK(
+                         rLockInfo.first, rLockInfo.second.m_sToken,
+                         nlastChanceToSendRefreshRequest,
+                         isAuthFailed))
+                {
+                    rInfo.m_nLastChanceToSendRefreshRequest
+                        = nlastChanceToSendRefreshRequest;
+                }
+                else
+                {
+                    if (isAuthFailed)
+                    {
+                        authFailedLocks.push_back(rLockInfo.first);
+                    }
+                    // refresh failed. stop auto-refresh.
+                    rInfo.m_nLastChanceToSendRefreshRequest = -1;
+                }
+            }
+        }
+    }
+
+    for (auto const& rLock : authFailedLocks)
+    {
+        removeLockImpl(aGuard, rLock);
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */