1 files changed, 175 insertions, 0 deletions
diff --git a/Source/WebKit2/NetworkProcess/cache/NetworkCacheSubresourcesEntry.cpp b/Source/WebKit2/NetworkProcess/cache/NetworkCacheSubresourcesEntry.cpp
new file mode 100644
index 000000000..561e4e6b8
--- /dev/null
+++ b/Source/WebKit2/NetworkProcess/cache/NetworkCacheSubresourcesEntry.cpp
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if ENABLE(NETWORK_CACHE_SPECULATIVE_REVALIDATION)
+#include "NetworkCacheSubresourcesEntry.h"
+
+#include "Logging.h"
+#include "NetworkCacheCoders.h"
+
+using namespace std::chrono;
+
+namespace WebKit {
+namespace NetworkCache {
+
+void SubresourceInfo::encode(WTF::Persistence::Encoder& encoder) const
+{
+    encoder << m_key;
+    encoder << m_lastSeen;
+    encoder << m_firstSeen;
+    encoder << m_isTransient;
+
+    // Do not bother serializing other data members of transient resources as they are empty.
+    if (m_isTransient)
+        return;
+
+    encoder << m_firstPartyForCookies;
+    encoder << m_requestHeaders;
+    encoder.encodeEnum(m_priority);
+}
+
+bool SubresourceInfo::decode(WTF::Persistence::Decoder& decoder, SubresourceInfo& info)
+{
+    if (!decoder.decode(info.m_key))
+        return false;
+    if (!decoder.decode(info.m_lastSeen))
+        return false;
+    if (!decoder.decode(info.m_firstSeen))
+        return false;
+    
+    if (!decoder.decode(info.m_isTransient))
+        return false;
+    
+    if (info.m_isTransient)
+        return true;
+    
+    if (!decoder.decode(info.m_firstPartyForCookies))
+        return false;
+
+    if (!decoder.decode(info.m_requestHeaders))
+        return false;
+
+    if (!decoder.decodeEnum(info.m_priority))
+        return false;
+    
+    return true;
+}
+
+Storage::Record SubresourcesEntry::encodeAsStorageRecord() const
+{
+    WTF::Persistence::Encoder encoder;
+    encoder << m_subresources;
+
+    encoder.encodeChecksum();
+
+    return { m_key, m_timeStamp, { encoder.buffer(), encoder.bufferSize() }, { }, { }};
+}
+
+std::unique_ptr<SubresourcesEntry> SubresourcesEntry::decodeStorageRecord(const Storage::Record& storageEntry)
+{
+    auto entry = std::make_unique<SubresourcesEntry>(storageEntry);
+
+    WTF::Persistence::Decoder decoder(storageEntry.header.data(), storageEntry.header.size());
+    if (!decoder.decode(entry->m_subresources))
+        return nullptr;
+
+    if (!decoder.verifyChecksum()) {
+        LOG(NetworkCache, "(NetworkProcess) checksum verification failure\n");
+        return nullptr;
+    }
+
+    return entry;
+}
+
+SubresourcesEntry::SubresourcesEntry(const Storage::Record& storageEntry)
+    : m_key(storageEntry.key)
+    , m_timeStamp(storageEntry.timeStamp)
+{
+    ASSERT(m_key.type() == "SubResources");
+}
+
+SubresourceInfo::SubresourceInfo(const Key& key, const WebCore::ResourceRequest& request, const SubresourceInfo* previousInfo)
+    : m_key(key)
+    , m_lastSeen(std::chrono::system_clock::now())
+    , m_firstSeen(previousInfo ? previousInfo->firstSeen() : m_lastSeen)
+    , m_isTransient(!previousInfo)
+    , m_firstPartyForCookies(request.firstPartyForCookies())
+    , m_requestHeaders(request.httpHeaderFields())
+    , m_priority(request.priority())
+{
+}
+
+static Vector<SubresourceInfo> makeSubresourceInfoVector(const Vector<std::unique_ptr<SubresourceLoad>>& subresourceLoads, Vector<SubresourceInfo>* previousSubresources)
+{
+    Vector<SubresourceInfo> result;
+    result.reserveInitialCapacity(subresourceLoads.size());
+    
+    HashMap<Key, unsigned> previousMap;
+    if (previousSubresources) {
+        for (unsigned i = 0; i < previousSubresources->size(); ++i)
+            previousMap.add(previousSubresources->at(i).key(), i);
+    }
+
+    HashSet<Key> deduplicationSet;
+    for (auto& load : subresourceLoads) {
+        if (!deduplicationSet.add(load->key).isNewEntry)
+            continue;
+        
+        SubresourceInfo* previousInfo = nullptr;
+        if (previousSubresources) {
+            auto it = previousMap.find(load->key);
+            if (it != previousMap.end())
+                previousInfo = &(*previousSubresources)[it->value];
+        }
+        
+        result.uncheckedAppend({ load->key, load->request, previousInfo });
+        
+        // FIXME: We should really consider all resources seen for the first time transient.
+        if (!previousSubresources)
+            result.last().setNonTransient();
+    }
+
+    return result;
+}
+
+SubresourcesEntry::SubresourcesEntry(Key&& key, const Vector<std::unique_ptr<SubresourceLoad>>& subresourceLoads)
+    : m_key(WTFMove(key))
+    , m_timeStamp(std::chrono::system_clock::now())
+    , m_subresources(makeSubresourceInfoVector(subresourceLoads, nullptr))
+{
+    ASSERT(m_key.type() == "SubResources");
+}
+    
+void SubresourcesEntry::updateSubresourceLoads(const Vector<std::unique_ptr<SubresourceLoad>>& subresourceLoads)
+{
+    m_subresources = makeSubresourceInfoVector(subresourceLoads, &m_subresources);
+}
+
+} // namespace WebKit
+} // namespace NetworkCache
+
+#endif // ENABLE(NETWORK_CACHE_SPECULATIVE_REVALIDATION)