New attempt at landing the resource_dispatcher_host.cc splitting (broke the build on Friday).

TBR=darin
Review URL: http://codereview.chromium.org/15801

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@7400 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 62 insertions, 0 deletions

diff --git a/chrome/browser/renderer_host/buffered_resource_handler.h b/chrome/browser/renderer_host/buffered_resource_handler.h
new file mode 100644
index 0000000..0b832a9
--- /dev/null
+++ b/chrome/browser/renderer_host/buffered_resource_handler.h
@@ -0,0 +1,62 @@
+// Copyright (c) 2006-2008 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 CHROME_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_
+#define CHROME_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_
+
+#include <string>
+
+#include "chrome/browser/renderer_host/resource_handler.h"
+
+class ResourceDispatcherHost;
+
+// Used to buffer a request until enough data has been received.
+class BufferedResourceHandler : public ResourceHandler {
+ public:
+  BufferedResourceHandler(ResourceHandler* handler,
+                          ResourceDispatcherHost* host,
+                          URLRequest* request);
+
+  // ResourceHandler implementation:
+  bool OnUploadProgress(int request_id, uint64 position, uint64 size);
+  bool OnRequestRedirected(int request_id, const GURL& new_url);
+  bool OnResponseStarted(int request_id, ResourceResponse* response);
+  bool OnWillRead(int request_id, char** buf, int* buf_size, int min_size);
+  bool OnReadCompleted(int request_id, int* bytes_read);
+  bool OnResponseCompleted(int request_id, const URLRequestStatus& status);
+
+ private:
+  // Returns true if we should delay OnResponseStarted forwarding.
+  bool DelayResponse();
+
+  // Returns true if there will be a need to parse the DocType of the document
+  // to determine the right way to handle it.
+  bool ShouldBuffer(const GURL& url, const std::string& mime_type);
+
+  // Returns true if there is enough information to process the DocType.
+  bool DidBufferEnough(int bytes_read);
+
+  // Returns true if we have to keep buffering data.
+  bool KeepBuffering(int bytes_read);
+
+  // Sends a pending OnResponseStarted notification. |in_complete| is true if
+  // this is invoked from |OnResponseCompleted|.
+  bool CompleteResponseStarted(int request_id, bool in_complete);
+
+  scoped_refptr<ResourceHandler> real_handler_;
+  scoped_refptr<ResourceResponse> response_;
+  ResourceDispatcherHost* host_;
+  URLRequest* request_;
+  char* read_buffer_;
+  int read_buffer_size_;
+  int bytes_read_;
+  bool sniff_content_;
+  bool should_buffer_;
+  bool buffering_;
+  bool finished_;
+
+  DISALLOW_COPY_AND_ASSIGN(BufferedResourceHandler);
+};
+
+#endif  // CHROME_BROWSER_RENDERER_HOST_BUFFERED_RESOURCE_HANDLER_H_