Add support for redirecting ResourceHandlers to a blob: URL

content/browser/storage_partition_impl_map.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/browser/storage_partition_impl_map.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "content/browser/appcache/chrome_appcache_service.h"
 #include "content/browser/fileapi/browser_file_system_helper.h"
 #include "content/browser/fileapi/chrome_blob_storage_context.h"
 #include "content/browser/histogram_internals_request_job.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/browser/net/view_blob_internals_job_factory.h"
 #include "content/browser/net/view_http_cache_job_factory.h"
 #include "content/browser/resource_context_impl.h"
 #include "content/browser/storage_partition_impl.h"
+#include "content/browser/streams/chrome_stream_context.h"
+#include "content/browser/streams/chrome_stream_registry.h"
+#include "content/browser/streams/stream_url_request_job.h"
 #include "content/browser/webui/url_data_manager_backend.h"
 #include "content/browser/tcmalloc_internals_request_job.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/url_constants.h"
 #include "crypto/sha2.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "net/url_request/url_request_context.h"
 #include "webkit/appcache/view_appcache_internals_job.h"
 #include "webkit/blob/blob_data.h"
 #include "webkit/blob/blob_url_request_job_factory.h"
 #include "webkit/fileapi/file_system_url_request_job_factory.h"
 
 using appcache::AppCacheService;
 using fileapi::FileSystemContext;
 using webkit_blob::BlobStorageController;
 
 namespace content {
 
 namespace {
 
 class BlobProtocolHandler : public net::URLRequestJobFactory::ProtocolHandler {
  public:
   BlobProtocolHandler(ChromeBlobStorageContext* blob_storage_context,
+                      ChromeStreamContext* stream_context,
                       fileapi::FileSystemContext* file_system_context)
       : blob_storage_context_(blob_storage_context),
+        stream_context_(stream_context),
         file_system_context_(file_system_context) {}
 
   virtual ~BlobProtocolHandler() {}
 
   virtual net::URLRequestJob* MaybeCreateJob(
       net::URLRequest* request,
       net::NetworkDelegate* network_delegate) const OVERRIDE {
     DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
     if (!webkit_blob_protocol_handler_impl_) {
       webkit_blob_protocol_handler_impl_.reset(
           new WebKitBlobProtocolHandlerImpl(blob_storage_context_->controller(),
+                                            stream_context_,
                                             file_system_context_));
     }
     return webkit_blob_protocol_handler_impl_->MaybeCreateJob(request,
                                                               network_delegate);
   }
 
  private:
   // An implementation of webkit_blob::BlobProtocolHandler that gets
   // the BlobData from ResourceRequestInfoImpl.
   class WebKitBlobProtocolHandlerImpl
       : public webkit_blob::BlobProtocolHandler {
    public:
     WebKitBlobProtocolHandlerImpl(
         webkit_blob::BlobStorageController* blob_storage_controller,
+        ChromeStreamContext* stream_context,
         fileapi::FileSystemContext* file_system_context)
         : webkit_blob::BlobProtocolHandler(
               blob_storage_controller, file_system_context,
               BrowserThread::GetMessageLoopProxyForThread(
-                  BrowserThread::FILE)) {}
+                  BrowserThread::FILE)),
+          stream_context_(stream_context) {}
 
     virtual ~WebKitBlobProtocolHandlerImpl() {}
 
+    virtual net::URLRequestJob* MaybeCreateJob(
+        net::URLRequest* request,
+        net::NetworkDelegate* network_delegate) const {
+      scoped_refptr<ChromeStream> stream =
+          stream_context_->registry()->GetStream(request->url());
+      if (stream) {
+        return new StreamURLRequestJob(request, network_delegate, stream);
+      } else {

[darin (slow to review), 2013/02/13 09:18:12]

nit: no need for else after return.

[Zachary Kuznia, 2013/02/13 16:37:14]

Done.

+        return webkit_blob::BlobProtocolHandler::MaybeCreateJob(
+            request, network_delegate);
+      }
+    }
+
    private:
     // webkit_blob::BlobProtocolHandler implementation.
     virtual scoped_refptr<webkit_blob::BlobData>
         LookupBlobData(net::URLRequest* request) const OVERRIDE {
       const ResourceRequestInfoImpl* info =
           ResourceRequestInfoImpl::ForRequest(request);
       if (!info)
         return NULL;
       return info->requested_blob_data();
     }
 
+    const scoped_refptr<ChromeStreamContext> stream_context_;
     DISALLOW_COPY_AND_ASSIGN(WebKitBlobProtocolHandlerImpl);
   };
 
   const scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
+  const scoped_refptr<ChromeStreamContext> stream_context_;
   const scoped_refptr<fileapi::FileSystemContext> file_system_context_;
 
   mutable scoped_ptr<WebKitBlobProtocolHandlerImpl>
   webkit_blob_protocol_handler_impl_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobProtocolHandler);
 };
 
 // Adds a bunch of debugging urls. We use an interceptor instead of a protocol
 // handler because we want to reuse the chrome://scheme (everyone is familiar
@@ skipping 328 matching lines @@
   base::FilePath partition_path =
       browser_context_->GetPath().Append(
           GetStoragePartitionPath(partition_domain, partition_name));
   StoragePartitionImpl* partition =
       StoragePartitionImpl::Create(browser_context_, in_memory,
                                    partition_path);
   partitions_[partition_config] = partition;
 
   ChromeBlobStorageContext* blob_storage_context =
       ChromeBlobStorageContext::GetFor(browser_context_);
+  ChromeStreamContext* stream_context =
+      ChromeStreamContext::GetFor(browser_context_);
   scoped_ptr<net::URLRequestJobFactory::ProtocolHandler> blob_protocol_handler(
-      new BlobProtocolHandler(blob_storage_context,
-                              partition->GetFileSystemContext()));
+      new BlobProtocolHandler(
+          blob_storage_context,
+          stream_context,
+          partition->GetFileSystemContext()));
   scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>
       file_system_protocol_handler(
             CreateFileSystemProtocolHandler(partition->GetFileSystemContext()));
   scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>
       developer_protocol_handler(
           new DeveloperProtocolHandler(partition->GetAppCacheService(),
                                        blob_storage_context));
   scoped_ptr<net::URLRequestJobFactory::ProtocolHandler>
       chrome_protocol_handler(
           URLDataManagerBackend::CreateProtocolHandler(
@@ skipping 139 matching lines @@
 
     // We do not call InitializeURLRequestContext() for media contexts because,
     // other than the HTTP cache, the media contexts share the same backing
     // objects as their associated "normal" request context.  Thus, the previous
     // call serves to initialize the media request context for this storage
     // partition as well.
   }
 }
 
 }  // namespace content