1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
// Copyright (c) 2010 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_
#pragma once
#include <string>
#include "base/timer.h"
#include "chrome/browser/download/download_file.h"
#include "chrome/browser/renderer_host/global_request_id.h"
#include "chrome/browser/renderer_host/resource_handler.h"
class DownloadFileManager;
class ResourceDispatcherHost;
class URLRequest;
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* download_file_manager,
URLRequest* request,
bool save_as,
const DownloadSaveInfo& save_info);
bool OnUploadProgress(int request_id, uint64 position, uint64 size);
// Not needed, as this event handler ought to be the final resource.
bool OnRequestRedirected(int request_id, const GURL& url,
ResourceResponse* response, bool* defer);
// Send the download creation information to the download thread.
bool OnResponseStarted(int request_id, ResourceResponse* response);
// Pass-through implementation.
bool OnWillStart(int request_id, const GURL& url, bool* defer);
// 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);
void OnRequestClosed();
// 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:
~DownloadResourceHandler();
void StartPauseTimer();
int download_id_;
GlobalRequestID global_id_;
int render_view_id_;
scoped_refptr<net::IOBuffer> read_buffer_;
std::string content_disposition_;
GURL url_;
int64 content_length_;
DownloadFileManager* download_file_manager_;
URLRequest* request_;
bool save_as_; // Request was initiated via "Save As" by the user.
DownloadSaveInfo save_info_;
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_
|
