********** Chromium Blob hacking

content/common/fileapi/webblobregistry_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/fileapi/webblobregistry_impl.h"
 
 #include "base/memory/ref_counted.h"
+#include "base/message_loop.h"
 #include "base/shared_memory.h"
 #include "content/common/child_thread.h"
 #include "content/common/fileapi/webblob_messages.h"
+#include "ipc/ipc_sync_message_filter.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebBlobData.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebString.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURL.h"
 #include "webkit/base/file_path_string_conversions.h"
 #include "webkit/blob/blob_data.h"
 
 using WebKit::WebBlobData;
 using WebKit::WebString;
 using WebKit::WebURL;
 
 namespace content {
 
 WebBlobRegistryImpl::WebBlobRegistryImpl(ChildThread* child_thread)
     : child_thread_(child_thread) {
 }
 
 WebBlobRegistryImpl::~WebBlobRegistryImpl() {
 }
 
-void WebBlobRegistryImpl::registerBlobURL(
-    const WebURL& url, WebBlobData& data) {
+void WebBlobRegistryImpl::registerBlobData(
+    const WebString& uuid, const WebBlobData& data) {
   const size_t kLargeThresholdBytes = 250 * 1024;
   const size_t kMaxSharedMemoryBytes = 10 * 1024 * 1024;
 
-  child_thread_->Send(new BlobHostMsg_StartBuildingBlob(url));
+  const std::string uuid_str(uuid.utf8());
+
+  SendFromAnyThread(new BlobHostMsg_StartBuildingBlob2(uuid_str));
   size_t i = 0;
   WebBlobData::Item data_item;
   while (data.itemAt(i++, data_item)) {
     webkit_blob::BlobData::Item item;
     switch (data_item.type) {
       case WebBlobData::Item::TypeData: {
         // WebBlobData does not allow partial data items.
         DCHECK(!data_item.offset && data_item.length == -1);
         if (data_item.data.size() == 0)
           break;
         if (data_item.data.size() < kLargeThresholdBytes) {
           item.SetToBytes(data_item.data.data(), data_item.data.size());
-          child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
+          SendFromAnyThread(
+              new BlobHostMsg_AppendBlobDataItem2(uuid_str, item));
         } else {
           // We handle larger amounts of data via SharedMemory instead of
           // writing it directly to the IPC channel.
           size_t data_size = data_item.data.size();
           const char* data_ptr = data_item.data.data();
           size_t shared_memory_size = std::min(
               data_size, kMaxSharedMemoryBytes);
           scoped_ptr<base::SharedMemory> shared_memory(
               child_thread_->AllocateSharedMemory(shared_memory_size));
           CHECK(shared_memory.get());
           while (data_size) {
             size_t chunk_size = std::min(data_size, shared_memory_size);
             memcpy(shared_memory->memory(), data_ptr, chunk_size);
-            child_thread_->Send(new BlobHostMsg_SyncAppendSharedMemory(
-                url, shared_memory->handle(), chunk_size));
+            SendFromAnyThread(new BlobHostMsg_AppendSharedMemory2(
+                uuid_str, shared_memory->handle(), chunk_size));
             data_size -= chunk_size;
             data_ptr += chunk_size;
           }
         }
         break;
       }
       case WebBlobData::Item::TypeFile:
         if (data_item.length) {
           item.SetToFilePathRange(
               webkit_base::WebStringToFilePath(data_item.filePath),
               static_cast<uint64>(data_item.offset),
               static_cast<uint64>(data_item.length),
               base::Time::FromDoubleT(data_item.expectedModificationTime));
-          child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
+          SendFromAnyThread(
+              new BlobHostMsg_AppendBlobDataItem2(uuid_str, item));
         }
         break;
       case WebBlobData::Item::TypeBlob:
         if (data_item.length) {
-          item.SetToBlobUrlRange(
-              data_item.blobURL,
+          item.SetToBlobRange(
+              data_item.blobUUID.utf8(),
               static_cast<uint64>(data_item.offset),
               static_cast<uint64>(data_item.length));
-          child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
+          SendFromAnyThread(
+              new BlobHostMsg_AppendBlobDataItem2(uuid_str, item));
         }
         break;
-      case WebBlobData::Item::TypeURL:
+      case WebBlobData::Item::TypeFileSystemURL:
         if (data_item.length) {
           // We only support filesystem URL as of now.
-          DCHECK(GURL(data_item.url).SchemeIsFileSystem());
+          DCHECK(GURL(data_item.fileSystemURL).SchemeIsFileSystem());
           item.SetToFileSystemUrlRange(
-              data_item.url,
+              data_item.fileSystemURL,
               static_cast<uint64>(data_item.offset),
               static_cast<uint64>(data_item.length),
               base::Time::FromDoubleT(data_item.expectedModificationTime));
-          child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
+          SendFromAnyThread(
+              new BlobHostMsg_AppendBlobDataItem2(uuid_str, item));
         }
         break;
       default:
         NOTREACHED();
     }
   }
-  child_thread_->Send(new BlobHostMsg_FinishBuildingBlob(
-      url, data.contentType().utf8().data()));
+  SendFromAnyThread(new BlobHostMsg_FinishBuildingBlob2(
+      uuid_str, data.contentType().utf8()));
 }
 
-void WebBlobRegistryImpl::registerBlobURL(
-    const WebURL& url, const WebURL& src_url) {
-  child_thread_->Send(new BlobHostMsg_CloneBlob(url, src_url));
+void WebBlobRegistryImpl::addBlobDataRef(const WebString& uuid) {
+  SendFromAnyThread(new BlobHostMsg_IncrementBlobRefCount(uuid.utf8()));
 }
 
-void WebBlobRegistryImpl::unregisterBlobURL(const WebURL& url) {
-  child_thread_->Send(new BlobHostMsg_RemoveBlob(url));
+void WebBlobRegistryImpl::removeBlobDataRef(const WebString& uuid) {
+  SendFromAnyThread(new BlobHostMsg_DecrementBlobRefCount(uuid.utf8()));
+}
+
+void WebBlobRegistryImpl::registerPublicBlobURL(
+    const WebURL& url, const WebString& uuid) {
+  SendFromAnyThread(new BlobHostMsg_RegisterPublicBlobURL(url, uuid.utf8()));
+}
+
+void WebBlobRegistryImpl::revokePublicBlobURL(const WebURL& url) {
+  SendFromAnyThread(new BlobHostMsg_RevokePublicBlobURL(url));
+}
+
+void WebBlobRegistryImpl::SendFromAnyThread(IPC::Message* msg) {
+  ChildThread* child_thread = ChildThread::current();
+  if (child_thread->message_loop() == MessageLoop::current())
+    child_thread->Send(msg);
+  else
+    child_thread->sync_message_filter()->Send(msg);
 }
 
 }  // namespace content