********** 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 "content/common/thread_safe_sender.h"
+#include "ipc/ipc_sync_message_filter.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebBlobData.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebString.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/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(ThreadSafeSender* sender)
+    : sender_(sender) {
 }
 
 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());
+
+  sender_->Send(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());
+          sender_->Send(
+              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(
+              ChildThread::AllocateSharedMemory(shared_memory_size, sender_));
+          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);
+            sender_->Send(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));
+          sender_->Send(
+              new BlobHostMsg_AppendBlobDataItem2(uuid_str, item));
+        }
+        break;
+      case WebBlobData::Item::TypeBlob:
+        if (data_item.length) {
+          item.SetToBlobRange(
+              data_item.blobUUID.utf8(),
+              static_cast<uint64>(data_item.offset),
+              static_cast<uint64>(data_item.length));
+          sender_->Send(
+              new BlobHostMsg_AppendBlobDataItem2(uuid_str, item));
+        }
+        break;
+      case WebBlobData::Item::TypeFileSystemURL:
+        if (data_item.length) {
+          // We only support filesystem URL as of now.
+          DCHECK(GURL(data_item.fileSystemURL).SchemeIsFileSystem());
+          item.SetToFileSystemUrlRange(
+              data_item.fileSystemURL,
+              static_cast<uint64>(data_item.offset),
+              static_cast<uint64>(data_item.length),
+              base::Time::FromDoubleT(data_item.expectedModificationTime));
+          sender_->Send(
+              new BlobHostMsg_AppendBlobDataItem2(uuid_str, item));
+        }
+        break;
+      default:
+        NOTREACHED();
+    }
+  }
+  sender_->Send(new BlobHostMsg_FinishBuildingBlob2(
+      uuid_str, data.contentType().utf8()));
+}
+
+void WebBlobRegistryImpl::addBlobDataRef(const WebString& uuid) {
+  sender_->Send(new BlobHostMsg_IncrementBlobRefCount(uuid.utf8()));
+}
+
+void WebBlobRegistryImpl::removeBlobDataRef(const WebString& uuid) {
+  sender_->Send(new BlobHostMsg_DecrementBlobRefCount(uuid.utf8()));
+}
+
+void WebBlobRegistryImpl::registerPublicBlobURL(
+    const WebURL& url, const WebString& uuid) {
+  sender_->Send(new BlobHostMsg_RegisterPublicBlobURL(url, uuid.utf8()));
+}
+
+void WebBlobRegistryImpl::revokePublicBlobURL(const WebURL& url) {
+  sender_->Send(new BlobHostMsg_RevokePublicBlobURL(url));
+}
+
+
+// DEPRECATED
+/*
+void WebBlobRegistryImpl::registerBlobURL(
+    const WebURL& url, WebBlobData& data) {
+  DCHECK(ChildThread::current()->message_loop() == MessageLoop::current());
+  const size_t kLargeThresholdBytes = 250 * 1024;
+  const size_t kMaxSharedMemoryBytes = 10 * 1024 * 1024;
+
+  sender_->Send(new BlobHostMsg_StartBuildingBlob(url));
+  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));
+          sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, 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));
+              ChildThread::AllocateSharedMemory(shared_memory_size, sender_));
           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(
+            sender_->Send(new BlobHostMsg_SyncAppendSharedMemory(
                 url, 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));
+          sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
         }
         break;
       case WebBlobData::Item::TypeBlob:
         if (data_item.length) {
           item.SetToBlobUrlRange(
               data_item.blobURL,
               static_cast<uint64>(data_item.offset),
               static_cast<uint64>(data_item.length));
-          child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
+          sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
         }
         break;
       case WebBlobData::Item::TypeURL:
         if (data_item.length) {
           // We only support filesystem URL as of now.
           DCHECK(GURL(data_item.url).SchemeIsFileSystem());
           item.SetToFileSystemUrlRange(
               data_item.url,
               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));
+          sender_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
         }
         break;
       default:
         NOTREACHED();
     }
   }
-  child_thread_->Send(new BlobHostMsg_FinishBuildingBlob(
+  sender_->Send(new BlobHostMsg_FinishBuildingBlob(
       url, data.contentType().utf8().data()));
 }
 
 void WebBlobRegistryImpl::registerBlobURL(
     const WebURL& url, const WebURL& src_url) {
-  child_thread_->Send(new BlobHostMsg_CloneBlob(url, src_url));
+  DCHECK(ChildThread::current()->message_loop() == MessageLoop::current());
+  sender_->Send(new BlobHostMsg_CloneBlob(url, src_url));
 }
 
 void WebBlobRegistryImpl::unregisterBlobURL(const WebURL& url) {
-  child_thread_->Send(new BlobHostMsg_RemoveBlob(url));
+  DCHECK(ChildThread::current()->message_loop() == MessageLoop::current());
+  sender_->Send(new BlobHostMsg_RemoveBlob(url));
 }
+*/
 
 }  // namespace content