Add content/browser/loader/ for resource loading related classes.

content/browser/renderer_host/buffered_resource_handler.h

-// 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.
-
-#ifndef CONTENT_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_
-#define CONTENT_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_
-
-#include <string>
-#include <vector>
-
-#include "base/memory/weak_ptr.h"
-#include "content/browser/renderer_host/layered_resource_handler.h"
-#include "content/public/browser/resource_controller.h"
-
-namespace net {
-class URLRequest;
-}
-
-namespace webkit {
-struct WebPluginInfo;
-}
-
-namespace content {
-class ResourceDispatcherHostImpl;
-
-// Used to buffer a request until enough data has been received.
-class BufferedResourceHandler
-    : public LayeredResourceHandler,
-      public ResourceController {
- public:
-  BufferedResourceHandler(scoped_ptr<ResourceHandler> next_handler,
-                          ResourceDispatcherHostImpl* host,
-                          net::URLRequest* request);
-  virtual ~BufferedResourceHandler();
-
- private:
-  // ResourceHandler implementation:
-  virtual void SetController(ResourceController* controller) OVERRIDE;
-  virtual bool OnResponseStarted(int request_id,
-                                 ResourceResponse* response,
-                                 bool* defer) OVERRIDE;
-  virtual bool OnWillRead(int request_id,
-                          net::IOBuffer** buf,
-                          int* buf_size,
-                          int min_size) OVERRIDE;
-  virtual bool OnReadCompleted(int request_id, int bytes_read,
-                               bool* defer) OVERRIDE;
-  virtual bool OnResponseCompleted(int request_id,
-                                   const net::URLRequestStatus& status,
-                                   const std::string& security_info) OVERRIDE;
-
-  // ResourceController implementation:
-  virtual void Resume() OVERRIDE;
-  virtual void Cancel() OVERRIDE;
-  virtual void CancelAndIgnore() OVERRIDE;
-  virtual void CancelWithError(int error_code) OVERRIDE;
-
-  bool ProcessResponse(bool* defer);
-
-  bool ShouldSniffContent();
-  bool DetermineMimeType();
-  bool SelectNextHandler(bool* defer);
-  bool UseAlternateNextHandler(scoped_ptr<ResourceHandler> handler);
-
-  bool ReplayReadCompleted(bool* defer);
-  void CallReplayReadCompleted();
-
-  bool MustDownload();
-  bool HasSupportingPlugin(bool* is_stale);
-
-  // Copies data from |read_buffer_| to |next_handler_|.
-  bool CopyReadBufferToNextHandler(int request_id);
-
-  // Called on the IO thread once the list of plugins has been loaded.
-  void OnPluginsLoaded(const std::vector<webkit::WebPluginInfo>& plugins);
-
-  enum State {
-    STATE_STARTING,
-
-    // In this state, we are filling read_buffer_ with data for the purpose
-    // of sniffing the mime type of the response.
-    STATE_BUFFERING,
-
-    // In this state, we are select an appropriate downstream ResourceHandler
-    // based on the mime type of the response.  We are also potentially waiting
-    // for plugins to load so that we can determine if a plugin is available to
-    // handle the mime type.
-    STATE_PROCESSING,
-
-    // In this state, we are replaying buffered events (OnResponseStarted and
-    // OnReadCompleted) to the downstream ResourceHandler.
-    STATE_REPLAYING,
-
-    // In this state, we are just a blind pass-through ResourceHandler.
-    STATE_STREAMING
-  };
-  State state_;
-
-  scoped_refptr<ResourceResponse> response_;
-  ResourceDispatcherHostImpl* host_;
-  net::URLRequest* request_;
-  scoped_refptr<net::IOBuffer> read_buffer_;
-  int read_buffer_size_;
-  int bytes_read_;
-
-  bool must_download_;
-  bool must_download_is_set_;
-
-  base::WeakPtrFactory<BufferedResourceHandler> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(BufferedResourceHandler);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_