Split up streams logic to prepare for PlzNavigate RDH changes.

content/browser/loader/stream_resource_handler.cc

 // Copyright (c) 2013 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/loader/stream_resource_handler.h"
 
-#include "base/guid.h"
 #include "base/logging.h"
-#include "content/browser/streams/stream.h"
-#include "content/browser/streams/stream_registry.h"
-#include "content/public/browser/resource_controller.h"
-#include "net/base/io_buffer.h"
-#include "net/url_request/url_request_status.h"
-#include "url/url_constants.h"
 
 namespace content {
 
 StreamResourceHandler::StreamResourceHandler(net::URLRequest* request,
                                              StreamRegistry* registry,
                                              const GURL& origin)
-    : ResourceHandler(request),
-      read_buffer_(NULL) {
-  // TODO(tyoshino): Find a way to share this with the blob URL creation in
-  // WebKit.
-  GURL url(std::string(url::kBlobScheme) + ":" + origin.spec() +
-           base::GenerateGUID());
-  stream_ = new Stream(registry, this, url);
+    : ResourceHandler(request) {
+  writer_.InitializeStream(registry, origin);
 }
 
 StreamResourceHandler::~StreamResourceHandler() {
-  stream_->RemoveWriteObserver(this);
+}
+
+void StreamResourceHandler::SetController(ResourceController* controller) {
+  writer_.set_controller(controller);
+  ResourceHandler::SetController(controller);
 }
 
 bool StreamResourceHandler::OnUploadProgress(uint64 position,
                                              uint64 size) {
   return true;
 }
 
 bool StreamResourceHandler::OnRequestRedirected(
     const net::RedirectInfo& redirect_info,
     ResourceResponse* resp,
@@ skipping 10 matching lines @@
   return true;
 }
 
 bool StreamResourceHandler::OnBeforeNetworkStart(const GURL& url, bool* defer) {
   return true;
 }
 
 bool StreamResourceHandler::OnWillRead(scoped_refptr<net::IOBuffer>* buf,
                                        int* buf_size,
                                        int min_size) {
-  static const int kReadBufSize = 32768;
-
-  DCHECK(buf && buf_size);
-  if (!read_buffer_.get())
-    read_buffer_ = new net::IOBuffer(kReadBufSize);
-  *buf = read_buffer_.get();
-  *buf_size = kReadBufSize;
-
+  writer_.OnWillRead(buf, buf_size, min_size);
   return true;
 }
 
 bool StreamResourceHandler::OnReadCompleted(int bytes_read, bool* defer) {
-  if (!bytes_read)
-    return true;
-
-  // We have more data to read.
-  DCHECK(read_buffer_.get());
-
-  // Release the ownership of the buffer, and store a reference
-  // to it. A new one will be allocated in OnWillRead().
-  scoped_refptr<net::IOBuffer> buffer;
-  read_buffer_.swap(buffer);
-  stream_->AddData(buffer, bytes_read);
-
-  if (!stream_->can_add_data())
-    *defer = true;
-
+  writer_.OnReadCompleted(bytes_read, defer);
   return true;
 }
 
 void StreamResourceHandler::OnResponseCompleted(
     const net::URLRequestStatus& status,
     const std::string& sec_info,
     bool* defer) {
-  stream_->Finalize();
+  writer_.Finalize();
 }
 
 void StreamResourceHandler::OnDataDownloaded(int bytes_downloaded) {
   NOTREACHED();
 }
 
-void StreamResourceHandler::OnSpaceAvailable(Stream* stream) {
-  controller()->Resume();
-}
-
-void StreamResourceHandler::OnClose(Stream* stream) {
-  controller()->Cancel();
-}
-
 }  // namespace content