Chromium Blob hacking

webkit/browser/blob/blob_url_request_job_factory.cc

 // Copyright (c) 2011 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 "webkit/browser/blob/blob_url_request_job_factory.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop_proxy.h"
-#include "net/url_request/url_request.h"
+#include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job_factory.h"
-#include "webkit/browser/blob/blob_storage_controller.h"
+#include "webkit/browser/blob/blob_data_handle.h"
 #include "webkit/browser/blob/blob_url_request_job.h"
 #include "webkit/browser/fileapi/file_system_context.h"
 
 namespace webkit_blob {
 
+namespace {
+
+int kUserDataKey;  // The value is not important, the addr is a key.
+
+BlobDataHandle* GetRequestedBlobDataHandle(net::URLRequest* request) {
+  return static_cast<BlobDataHandle*>(request->GetUserData(&kUserDataKey));
+}
+
+}  // namespace
+
+// static
+net::URLRequest* BlobProtocolHandler::CreateBlobRequest(
+    scoped_ptr<BlobDataHandle> blob_data_handle,
+    const net::URLRequestContext* request_context,
+    net::URLRequest::Delegate* request_delegate) {
+  const GURL kBlobUrl("blob://see_user_data/");
+  net::URLRequest* request = request_context->CreateRequest(
+      kBlobUrl, request_delegate);
+  SetRequestedBlobDataHandle(request, blob_data_handle.Pass());
+  return request;
+}
+
+// static
+void BlobProtocolHandler::SetRequestedBlobDataHandle(
+    net::URLRequest* request,
+    scoped_ptr<BlobDataHandle> blob_data_handle) {
+  request->SetUserData(&kUserDataKey, blob_data_handle.release());
+}
+
 BlobProtocolHandler::BlobProtocolHandler(
-    webkit_blob::BlobStorageController* blob_storage_controller,
     fileapi::FileSystemContext* file_system_context,
     base::MessageLoopProxy* loop_proxy)
-    : blob_storage_controller_(blob_storage_controller),
-      file_system_context_(file_system_context),
+    : file_system_context_(file_system_context),
       file_loop_proxy_(loop_proxy) {
-  DCHECK(blob_storage_controller_);
-  DCHECK(file_system_context_.get());
-  DCHECK(file_loop_proxy_.get());
 }
 
-BlobProtocolHandler::~BlobProtocolHandler() {}
+BlobProtocolHandler::~BlobProtocolHandler() {
+}
 
 net::URLRequestJob* BlobProtocolHandler::MaybeCreateJob(
     net::URLRequest* request, net::NetworkDelegate* network_delegate) const {
-  scoped_refptr<webkit_blob::BlobData> data = LookupBlobData(request);
-  if (!data.get()) {
-    // This request is not coming through resource dispatcher host.
-    data = blob_storage_controller_->GetBlobDataFromUrl(request->url());
-  }
-  return new webkit_blob::BlobURLRequestJob(request,
-                                            network_delegate,
-                                            data.get(),
-                                            file_system_context_.get(),
-                                            file_loop_proxy_.get());
+  return new webkit_blob::BlobURLRequestJob(
+      request, network_delegate, LookupBlobData(request),
+      file_system_context_, file_loop_proxy_);
 }
 
 scoped_refptr<webkit_blob::BlobData>
 BlobProtocolHandler::LookupBlobData(net::URLRequest* request) const {
+  BlobDataHandle* blob_data_handle = GetRequestedBlobDataHandle(request);
+  if (blob_data_handle)
+    return blob_data_handle->data();
   return NULL;
 }
 
 }  // namespace webkit_blob