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// 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 GURL& 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, net::IOBuffer** buf, int* buf_size,
int min_size);
bool OnReadCompleted(int request_id, int* bytes_read);
bool OnResponseCompleted(int request_id,
const URLRequestStatus& status,
const std::string& security_info);
// 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_;
scoped_refptr<net::IOBuffer> read_buffer_;
std::string content_disposition_;
GURL 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 size_t 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_
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