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
211
212
213
214
215
216
217
218
219
220
|
// Copyright (c) 2013 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/streams/stream_url_request_job.h"
#include "base/strings/string_number_conversions.h"
#include "content/browser/streams/stream.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
#include "net/http/http_byte_range.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_response_info.h"
#include "net/http/http_util.h"
#include "net/url_request/url_request.h"
namespace content {
StreamURLRequestJob::StreamURLRequestJob(
net::URLRequest* request,
net::NetworkDelegate* network_delegate,
scoped_refptr<Stream> stream)
: net::URLRequestJob(request, network_delegate),
weak_factory_(this),
stream_(stream),
headers_set_(false),
pending_buffer_size_(0),
total_bytes_read_(0),
max_range_(0),
request_failed_(false) {
DCHECK(stream_.get());
stream_->SetReadObserver(this);
}
StreamURLRequestJob::~StreamURLRequestJob() {
ClearStream();
}
void StreamURLRequestJob::OnDataAvailable(Stream* stream) {
// Clear the IO_PENDING status.
SetStatus(net::URLRequestStatus());
if (pending_buffer_.get()) {
int bytes_read;
stream_->ReadRawData(
pending_buffer_.get(), pending_buffer_size_, &bytes_read);
// Clear the buffers before notifying the read is complete, so that it is
// safe for the observer to read.
pending_buffer_ = NULL;
pending_buffer_size_ = 0;
total_bytes_read_ += bytes_read;
NotifyReadComplete(bytes_read);
}
}
// net::URLRequestJob methods.
void StreamURLRequestJob::Start() {
// Continue asynchronously.
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&StreamURLRequestJob::DidStart, weak_factory_.GetWeakPtr()));
}
void StreamURLRequestJob::Kill() {
net::URLRequestJob::Kill();
weak_factory_.InvalidateWeakPtrs();
ClearStream();
}
bool StreamURLRequestJob::ReadRawData(net::IOBuffer* buf,
int buf_size,
int* bytes_read) {
if (request_failed_)
return true;
DCHECK(bytes_read);
int to_read = buf_size;
if (max_range_ && to_read) {
if (to_read + total_bytes_read_ > max_range_)
to_read = max_range_ - total_bytes_read_;
if (to_read <= 0) {
*bytes_read = 0;
return true;
}
}
switch (stream_->ReadRawData(buf, to_read, bytes_read)) {
case Stream::STREAM_HAS_DATA:
case Stream::STREAM_COMPLETE:
total_bytes_read_ += *bytes_read;
return true;
case Stream::STREAM_EMPTY:
pending_buffer_ = buf;
pending_buffer_size_ = to_read;
SetStatus(net::URLRequestStatus(net::URLRequestStatus::IO_PENDING, 0));
return false;
}
NOTREACHED();
return false;
}
bool StreamURLRequestJob::GetMimeType(std::string* mime_type) const {
if (!response_info_)
return false;
// TODO(zork): Support registered MIME types if needed.
return response_info_->headers->GetMimeType(mime_type);
}
void StreamURLRequestJob::GetResponseInfo(net::HttpResponseInfo* info) {
if (response_info_)
*info = *response_info_;
}
int StreamURLRequestJob::GetResponseCode() const {
if (!response_info_)
return -1;
return response_info_->headers->response_code();
}
void StreamURLRequestJob::SetExtraRequestHeaders(
const net::HttpRequestHeaders& headers) {
std::string range_header;
if (headers.GetHeader(net::HttpRequestHeaders::kRange, &range_header)) {
std::vector<net::HttpByteRange> ranges;
if (net::HttpUtil::ParseRangeHeader(range_header, &ranges)) {
if (ranges.size() == 1) {
// Streams don't support seeking, so a non-zero starting position
// doesn't make sense.
if (ranges[0].first_byte_position() == 0) {
max_range_ = ranges[0].last_byte_position() + 1;
} else {
NotifyFailure(net::ERR_METHOD_NOT_SUPPORTED);
return;
}
} else {
NotifyFailure(net::ERR_METHOD_NOT_SUPPORTED);
return;
}
}
}
}
void StreamURLRequestJob::DidStart() {
// We only support GET request.
if (request()->method() != "GET") {
NotifyFailure(net::ERR_METHOD_NOT_SUPPORTED);
return;
}
HeadersCompleted(net::HTTP_OK);
}
void StreamURLRequestJob::NotifyFailure(int error_code) {
request_failed_ = true;
// If we already return the headers on success, we can't change the headers
// now. Instead, we just error out.
if (headers_set_) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
error_code));
return;
}
// TODO(zork): Share these with BlobURLRequestJob.
net::HttpStatusCode status_code = net::HTTP_INTERNAL_SERVER_ERROR;
std::string status_txt;
switch (error_code) {
case net::ERR_ACCESS_DENIED:
status_code = net::HTTP_FORBIDDEN;
break;
case net::ERR_FILE_NOT_FOUND:
status_code = net::HTTP_NOT_FOUND;
break;
case net::ERR_METHOD_NOT_SUPPORTED:
status_code = net::HTTP_METHOD_NOT_ALLOWED;
break;
case net::ERR_FAILED:
break;
default:
DCHECK(false);
break;
}
HeadersCompleted(status_code);
}
void StreamURLRequestJob::HeadersCompleted(net::HttpStatusCode status_code) {
std::string status("HTTP/1.1 ");
status.append(base::IntToString(status_code));
status.append(" ");
status.append(net::GetHttpReasonPhrase(status_code));
status.append("\0\0", 2);
net::HttpResponseHeaders* headers = new net::HttpResponseHeaders(status);
if (status_code == net::HTTP_OK) {
std::string content_type_header(net::HttpRequestHeaders::kContentType);
content_type_header.append(": ");
content_type_header.append("plain/text");
headers->AddHeader(content_type_header);
}
response_info_.reset(new net::HttpResponseInfo());
response_info_->headers = headers;
headers_set_ = true;
NotifyHeadersComplete();
}
void StreamURLRequestJob::ClearStream() {
if (stream_.get()) {
stream_->RemoveReadObserver(this);
stream_ = NULL;
}
}
} // namespace content
|
