1 files changed, 75 insertions, 0 deletions
diff --git a/Source/WebKit2/NetworkProcess/cache/NetworkCacheBlobStorage.h b/Source/WebKit2/NetworkProcess/cache/NetworkCacheBlobStorage.h
new file mode 100644
index 000000000..adf0b085e
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+++ b/Source/WebKit2/NetworkProcess/cache/NetworkCacheBlobStorage.h
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+/*
+ * 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.
+ */
+
+#ifndef NetworkCacheBlobStorage_h
+#define NetworkCacheBlobStorage_h
+
+#if ENABLE(NETWORK_CACHE)
+
+#include "NetworkCacheData.h"
+#include "NetworkCacheKey.h"
+#include <wtf/SHA1.h>
+
+namespace WebKit {
+namespace NetworkCache {
+
+// BlobStorage deduplicates the data using SHA1 hash computed over the blob bytes.
+class BlobStorage {
+    WTF_MAKE_NONCOPYABLE(BlobStorage);
+public:
+    BlobStorage(const String& blobDirectoryPath, Salt);
+
+    struct Blob {
+        Data data;
+        SHA1::Digest hash;
+    };
+    // These are all synchronous and should not be used from the main thread.
+    Blob add(const String& path, const Data&);
+    Blob get(const String& path);
+
+    // Blob won't be removed until synchronization.
+    void remove(const String& path);
+
+    unsigned shareCount(const String& path);
+
+    size_t approximateSize() const { return m_approximateSize; }
+
+    void synchronize();
+
+private:
+    String blobDirectoryPath() const;
+    String blobPathForHash(const SHA1::Digest&) const;
+
+    const String m_blobDirectoryPath;
+    const Salt m_salt;
+
+    std::atomic<size_t> m_approximateSize { 0 };
+};
+
+}
+}
+
+#endif
+#endif