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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// 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.
#include "chrome/browser/renderer_host/offline_resource_handler.h"
#include <vector>
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/singleton.h"
#include "base/string_util.h"
#include "chrome/browser/browser_thread.h"
#include "chrome/browser/chromeos/network_state_notifier.h"
#include "chrome/browser/chromeos/offline/offline_load_page.h"
#include "chrome/browser/chromeos/offline/offline_load_service.h"
#include "chrome/browser/renderer_host/resource_dispatcher_host.h"
#include "chrome/browser/renderer_host/resource_dispatcher_host_request_info.h"
#include "chrome/common/url_constants.h"
OfflineResourceHandler::OfflineResourceHandler(
ResourceHandler* handler,
int host_id,
int route_id,
ResourceDispatcherHost* rdh,
URLRequest* request)
: next_handler_(handler),
process_host_id_(host_id),
render_view_id_(route_id),
rdh_(rdh),
request_(request),
deferred_request_id_(-1) {
}
bool OfflineResourceHandler::OnUploadProgress(int request_id,
uint64 position,
uint64 size) {
return next_handler_->OnUploadProgress(request_id, position, size);
}
bool OfflineResourceHandler::OnRequestRedirected(int request_id,
const GURL& new_url,
ResourceResponse* response,
bool* defer) {
return next_handler_->OnRequestRedirected(
request_id, new_url, response, defer);
}
bool OfflineResourceHandler::OnResponseStarted(int request_id,
ResourceResponse* response) {
return next_handler_->OnResponseStarted(request_id, response);
}
bool OfflineResourceHandler::OnResponseCompleted(
int request_id,
const URLRequestStatus& status,
const std::string& security_info) {
return next_handler_->OnResponseCompleted(request_id, status, security_info);
}
void OfflineResourceHandler::OnRequestClosed() {
next_handler_->OnRequestClosed();
}
bool OfflineResourceHandler::OnWillStart(int request_id,
const GURL& url,
bool* defer) {
if (ShouldShowOfflinePage(url)) {
deferred_request_id_ = request_id;
deferred_url_ = url;
DLOG(INFO) << "WillStart: this=" << this << ", request id=" << request_id;
AddRef(); // Balanced with OnBlockingPageComplete
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
NewRunnableMethod(this, &OfflineResourceHandler::ShowOfflinePage));
*defer = true;
return true;
}
return next_handler_->OnWillStart(request_id, url, defer);
}
// We'll let the original event handler provide a buffer, and reuse it for
// subsequent reads until we're done buffering.
bool OfflineResourceHandler::OnWillRead(int request_id, net::IOBuffer** buf,
int* buf_size, int min_size) {
return next_handler_->OnWillRead(request_id, buf, buf_size, min_size);
}
bool OfflineResourceHandler::OnReadCompleted(int request_id, int* bytes_read) {
return next_handler_->OnReadCompleted(request_id, bytes_read);
}
void OfflineResourceHandler::OnBlockingPageComplete(bool proceed) {
if (deferred_request_id_ < 0) {
LOG(WARNING) << "OnBlockingPageComplete called after completion: "
<< " this=" << this << ", request_id="
<< deferred_request_id_;
NOTREACHED();
return;
}
if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableMethod(this,
&OfflineResourceHandler::OnBlockingPageComplete,
proceed));
return;
}
if (proceed) {
Resume();
} else {
int request_id = deferred_request_id_;
ClearRequestInfo();
rdh_->CancelRequest(process_host_id_, request_id, false);
}
Release(); // Balanced with OnWillStart
}
void OfflineResourceHandler::ClearRequestInfo() {
deferred_url_ = GURL();
deferred_request_id_ = -1;
}
bool OfflineResourceHandler::IsRemote(const GURL& url) const {
return url.SchemeIs(chrome::kFtpScheme) ||
url.SchemeIs(chrome::kHttpScheme) ||
url.SchemeIs(chrome::kHttpsScheme);
}
bool OfflineResourceHandler::ShouldShowOfflinePage(const GURL& url) const {
// Only check main frame. If the network is disconnected while
// loading other resources, we'll simply show broken link/images.
return IsRemote(url) &&
!chromeos::NetworkStateNotifier::is_connected() &&
ResourceDispatcherHost::InfoForRequest(request_)->resource_type()
== ResourceType::MAIN_FRAME &&
!chromeos::OfflineLoadService::Get()->ShouldProceed(
process_host_id_, render_view_id_, url);
}
void OfflineResourceHandler::Resume() {
const GURL url = deferred_url_;
int request_id = deferred_request_id_;
ClearRequestInfo();
chromeos::OfflineLoadService::Get()->Proceeded(
process_host_id_, render_view_id_, url);
DCHECK_NE(request_id, -1);
bool defer = false;
DLOG(INFO) << "Resume load: this=" << this
<< ", request id=" << request_id;
next_handler_->OnWillStart(request_id, url, &defer);
if (!defer)
rdh_->StartDeferredRequest(process_host_id_, request_id);
}
void OfflineResourceHandler::ShowOfflinePage() {
chromeos::OfflineLoadPage::Show(
process_host_id_, render_view_id_, deferred_url_, this);
}
|
