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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
// Copyright (c) 2014 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 "content/browser/android/url_request_content_job.h"
#include "base/android/content_uri_utils.h"
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/message_loop/message_loop.h"
#include "base/task_runner.h"
#include "net/base/file_stream.h"
#include "net/base/io_buffer.h"
#include "net/http/http_util.h"
#include "net/url_request/url_request_error_job.h"
#include "url/gurl.h"
namespace content {
// TODO(qinmin): Refactor this class to reuse the common code in
// url_request_file_job.cc.
URLRequestContentJob::ContentMetaInfo::ContentMetaInfo()
: content_exists(false),
content_size(0) {
}
URLRequestContentJob::URLRequestContentJob(
net::URLRequest* request,
net::NetworkDelegate* network_delegate,
const base::FilePath& content_path,
const scoped_refptr<base::TaskRunner>& content_task_runner)
: net::URLRequestJob(request, network_delegate),
content_path_(content_path),
stream_(new net::FileStream(content_task_runner)),
content_task_runner_(content_task_runner),
range_parse_result_(net::OK),
remaining_bytes_(0),
io_pending_(false),
weak_ptr_factory_(this) {}
void URLRequestContentJob::Start() {
ContentMetaInfo* meta_info = new ContentMetaInfo();
content_task_runner_->PostTaskAndReply(
FROM_HERE,
base::Bind(&URLRequestContentJob::FetchMetaInfo, content_path_,
base::Unretained(meta_info)),
base::Bind(&URLRequestContentJob::DidFetchMetaInfo,
weak_ptr_factory_.GetWeakPtr(),
base::Owned(meta_info)));
}
void URLRequestContentJob::Kill() {
stream_.reset();
weak_ptr_factory_.InvalidateWeakPtrs();
net::URLRequestJob::Kill();
}
int URLRequestContentJob::ReadRawData(net::IOBuffer* dest, int dest_size) {
DCHECK_GT(dest_size, 0);
DCHECK_GE(remaining_bytes_, 0);
if (remaining_bytes_ < dest_size)
dest_size = remaining_bytes_;
// If we should copy zero bytes because |remaining_bytes_| is zero, short
// circuit here.
if (!dest_size)
return 0;
int rv = stream_->Read(dest, dest_size,
base::Bind(&URLRequestContentJob::DidRead,
weak_ptr_factory_.GetWeakPtr()));
if (rv == net::ERR_IO_PENDING) {
io_pending_ = true;
} else if (rv > 0) {
remaining_bytes_ -= rv;
}
DCHECK_GE(remaining_bytes_, 0);
return rv;
}
bool URLRequestContentJob::IsRedirectResponse(GURL* location,
int* http_status_code) {
return false;
}
bool URLRequestContentJob::GetMimeType(std::string* mime_type) const {
DCHECK(request_);
if (!meta_info_.mime_type.empty()) {
*mime_type = meta_info_.mime_type;
return true;
}
return false;
}
void URLRequestContentJob::SetExtraRequestHeaders(
const net::HttpRequestHeaders& headers) {
std::string range_header;
if (!headers.GetHeader(net::HttpRequestHeaders::kRange, &range_header))
return;
// Currently this job only cares about the Range header. Note that validation
// is deferred to DidOpen(), because NotifyStartError is not legal to call
// since the job has not started.
std::vector<net::HttpByteRange> ranges;
if (net::HttpUtil::ParseRangeHeader(range_header, &ranges)) {
if (ranges.size() == 1) {
byte_range_ = ranges[0];
} else {
// We don't support multiple range requests.
range_parse_result_ = net::ERR_REQUEST_RANGE_NOT_SATISFIABLE;
}
}
}
URLRequestContentJob::~URLRequestContentJob() {}
void URLRequestContentJob::FetchMetaInfo(const base::FilePath& content_path,
ContentMetaInfo* meta_info) {
base::File::Info file_info;
meta_info->content_exists = base::GetFileInfo(content_path, &file_info);
if (meta_info->content_exists) {
meta_info->content_size = file_info.size;
meta_info->mime_type = base::GetContentUriMimeType(content_path);
}
}
void URLRequestContentJob::DidFetchMetaInfo(const ContentMetaInfo* meta_info) {
meta_info_ = *meta_info;
if (!meta_info_.content_exists) {
DidOpen(net::ERR_FILE_NOT_FOUND);
return;
}
int flags = base::File::FLAG_OPEN |
base::File::FLAG_READ |
base::File::FLAG_ASYNC;
int rv = stream_->Open(content_path_, flags,
base::Bind(&URLRequestContentJob::DidOpen,
weak_ptr_factory_.GetWeakPtr()));
if (rv != net::ERR_IO_PENDING)
DidOpen(rv);
}
void URLRequestContentJob::DidOpen(int result) {
if (result != net::OK) {
NotifyStartError(
net::URLRequestStatus(net::URLRequestStatus::FAILED, result));
return;
}
if (range_parse_result_ != net::OK) {
NotifyStartError(net::URLRequestStatus(net::URLRequestStatus::FAILED,
range_parse_result_));
return;
}
if (!byte_range_.ComputeBounds(meta_info_.content_size)) {
NotifyStartError(net::URLRequestStatus(
net::URLRequestStatus::FAILED, net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
return;
}
remaining_bytes_ = byte_range_.last_byte_position() -
byte_range_.first_byte_position() + 1;
DCHECK_GE(remaining_bytes_, 0);
if (remaining_bytes_ > 0 && byte_range_.first_byte_position() != 0) {
int rv = stream_->Seek(byte_range_.first_byte_position(),
base::Bind(&URLRequestContentJob::DidSeek,
weak_ptr_factory_.GetWeakPtr()));
if (rv != net::ERR_IO_PENDING) {
// stream_->Seek() failed, so pass an intentionally erroneous value
// into DidSeek().
DidSeek(-1);
}
} else {
// We didn't need to call stream_->Seek() at all, so we pass to DidSeek()
// the value that would mean seek success. This way we skip the code
// handling seek failure.
DidSeek(byte_range_.first_byte_position());
}
}
void URLRequestContentJob::DidSeek(int64_t result) {
if (result != byte_range_.first_byte_position()) {
NotifyStartError(net::URLRequestStatus(
net::URLRequestStatus::FAILED, net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
return;
}
set_expected_content_size(remaining_bytes_);
NotifyHeadersComplete();
}
void URLRequestContentJob::DidRead(int result) {
DCHECK(io_pending_);
io_pending_ = false;
if (result > 0) {
remaining_bytes_ -= result;
DCHECK_GE(remaining_bytes_, 0);
}
ReadRawDataComplete(result);
}
} // namespace content
|
