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
diff --git a/chrome/browser/renderer_host/download_resource_handler.h b/chrome/browser/renderer_host/download_resource_handler.h
new file mode 100644
index 0000000..52f6c947
--- /dev/null
+++ b/chrome/browser/renderer_host/download_resource_handler.h
@@ -0,0 +1,75 @@
+// 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_DOWNLOAD_RESOURCE_HANDLER_H_
+#define CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_
+
+#include <string>
+
+#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
+#include "chrome/browser/renderer_host/resource_handler.h"
+
+struct DownloadBuffer;
+
+// Forwards data to the download thread.
+class DownloadResourceHandler : public ResourceHandler {
+ public:
+ DownloadResourceHandler(ResourceDispatcherHost* rdh,
+ int render_process_host_id,
+ int render_view_id,
+ int request_id,
+ const std::string& url,
+ DownloadFileManager* manager,
+ URLRequest* request,
+ bool save_as);
+
+ // Not needed, as this event handler ought to be the final resource.
+ bool OnRequestRedirected(int request_id, const GURL& url);
+
+ // Send the download creation information to the download thread.
+ bool OnResponseStarted(int request_id, ResourceResponse* response);
+
+ // Create a new buffer, which will be handed to the download thread for file
+ // writing and deletion.
+ 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);
+
+ // If the content-length header is not present (or contains something other
+ // than numbers), the incoming content_length is -1 (unknown size).
+ // Set the content length to 0 to indicate unknown size to DownloadManager.
+ void set_content_length(const int64& content_length);
+
+ void set_content_disposition(const std::string& content_disposition);
+
+ void CheckWriteProgress();
+
+ private:
+ void StartPauseTimer();
+
+ int download_id_;
+ ResourceDispatcherHost::GlobalRequestID global_id_;
+ int render_view_id_;
+ char* read_buffer_;
+ std::string content_disposition_;
+ std::wstring url_;
+ int64 content_length_;
+ DownloadFileManager* download_manager_;
+ URLRequest* request_;
+ bool save_as_; // Request was initiated via "Save As" by the user.
+ DownloadBuffer* buffer_;
+ ResourceDispatcherHost* rdh_;
+ bool is_paused_;
+ base::OneShotTimer<DownloadResourceHandler> pause_timer_;
+
+ static const int kReadBufSize = 32768; // bytes
+ static const int kLoadsToWrite = 100; // number of data buffers queued
+ static const int kThrottleTimeMs = 200; // milliseconds
+
+ DISALLOW_COPY_AND_ASSIGN(DownloadResourceHandler);
+};
+
+#endif // CHROME_BROWSER_RENDERER_HOST_DOWNLOAD_RESOURCE_HANDLER_H_
