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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "HttpSkipResponseCommand.h"
#include "HttpConnection.h"
#include "HttpResponse.h"
#include "message.h"
#include "SocketCore.h"
#include "DlRetryEx.h"
#include "Request.h"
#include "DownloadEngine.h"
#include "Logger.h"
#include "LogFactory.h"
#include "HttpRequest.h"
#include "Segment.h"
#include "util.h"
#include "fmt.h"
#include "DlAbortEx.h"
#include "HttpHeader.h"
#include "prefs.h"
#include "Option.h"
#include "CookieStorage.h"
#include "AuthConfigFactory.h"
#include "AuthConfig.h"
#include "DownloadContext.h"
#include "StreamFilter.h"
#include "BinaryStream.h"
#include "NullSinkStreamFilter.h"
#include "SinkStreamFilter.h"
#include "error_code.h"
#include "SocketRecvBuffer.h"
namespace aria2 {
HttpSkipResponseCommand::HttpSkipResponseCommand
(cuid_t cuid,
const std::shared_ptr<Request>& req,
const std::shared_ptr<FileEntry>& fileEntry,
RequestGroup* requestGroup,
const std::shared_ptr<HttpConnection>& httpConnection,
std::unique_ptr<HttpResponse> httpResponse,
DownloadEngine* e,
const std::shared_ptr<SocketCore>& s)
: AbstractCommand(cuid, req, fileEntry, requestGroup, e, s,
httpConnection->getSocketRecvBuffer()),
sinkFilterOnly_(true),
totalLength_(httpResponse->getEntityLength()),
receivedBytes_(0),
httpConnection_(httpConnection),
httpResponse_(std::move(httpResponse)),
streamFilter_(new NullSinkStreamFilter())
{
checkSocketRecvBuffer();
}
HttpSkipResponseCommand::~HttpSkipResponseCommand() {}
void HttpSkipResponseCommand::installStreamFilter
(std::unique_ptr<StreamFilter> streamFilter)
{
if(!streamFilter) {
return;
}
streamFilter->installDelegate(std::move(streamFilter_));
streamFilter_ = std::move(streamFilter);
const std::string& name = streamFilter_->getName();
sinkFilterOnly_ = util::endsWith(name, SinkStreamFilter::NAME);
}
bool HttpSkipResponseCommand::executeInternal()
{
if(getRequest()->getMethod() == Request::METHOD_HEAD ||
(totalLength_ == 0 && sinkFilterOnly_)) {
// If request method is HEAD or content-length header is present and
// it's value is 0, then pool socket for reuse.
// If content-length header is not present, then EOF is expected in the end.
// In this case, the content is thrown away and socket cannot be pooled.
if(getRequest()->getMethod() == Request::METHOD_HEAD ||
httpResponse_->getHttpHeader()->defined(HttpHeader::CONTENT_LENGTH)) {
poolConnection();
}
return processResponse();
}
bool eof = false;
try {
size_t bufSize;
if(getSocketRecvBuffer()->bufferEmpty()) {
eof = getSocketRecvBuffer()->recv() == 0 &&
!getSocket()->wantRead() && !getSocket()->wantWrite();
}
if(!eof) {
if(sinkFilterOnly_) {
if(totalLength_ > 0) {
bufSize = std::min
(totalLength_-receivedBytes_,
static_cast<int64_t>(getSocketRecvBuffer()->getBufferLength()));
} else {
bufSize = getSocketRecvBuffer()->getBufferLength();
}
receivedBytes_ += bufSize;
} else {
// receivedBytes_ is not updated if transferEncoding is set.
// The return value is safely ignored here.
streamFilter_->transform(std::shared_ptr<BinaryStream>(),
std::shared_ptr<Segment>(),
getSocketRecvBuffer()->getBuffer(),
getSocketRecvBuffer()->getBufferLength());
bufSize = streamFilter_->getBytesProcessed();
}
getSocketRecvBuffer()->shiftBuffer(bufSize);
}
if(totalLength_ != 0 && eof) {
throw DL_RETRY_EX(EX_GOT_EOF);
}
} catch(RecoverableException& e) {
A2_LOG_DEBUG_EX(EX_EXCEPTION_CAUGHT, e)
return processResponse();
}
if(eof) {
// we may get EOF before non-sink streamFilter reports its
// completion. There are some broken servers to prevent
// streamFilter from completion. Since we just discard the
// response body anyway, so we assume that the response is
// completed.
return processResponse();
}
bool finished = false;
if(sinkFilterOnly_) {
finished = (totalLength_ == receivedBytes_);
} else {
finished = streamFilter_->finished();
}
if(finished) {
if(getSegments().size() <= 1) {
// Don't pool connection if the command has multiple
// segments. This means it did HTTP pipelined request. If this
// response is for the first request, then successive response
// may arrived to the socket.
poolConnection();
}
return processResponse();
} else {
setWriteCheckSocketIf(getSocket(), getSocket()->wantWrite());
addCommandSelf();
return false;
}
}
void HttpSkipResponseCommand::poolConnection() const
{
if(getRequest()->supportsPersistentConnection()) {
getDownloadEngine()->poolSocket
(getRequest(), createProxyRequest(), getSocket());
}
}
bool HttpSkipResponseCommand::processResponse()
{
int statusCode;
if(httpResponse_->isRedirect()) {
int rnum =
httpResponse_->getHttpRequest()->getRequest()->getRedirectCount();
if(rnum >= Request::MAX_REDIRECT) {
throw DL_ABORT_EX2(fmt("Too many redirects: count=%u", rnum),
error_code::HTTP_TOO_MANY_REDIRECTS);
}
httpResponse_->processRedirect();
return prepareForRetry(0);
} else if((statusCode = httpResponse_->getStatusCode()) >= 400) {
if(statusCode == 401) {
if(getOption()->getAsBool(PREF_HTTP_AUTH_CHALLENGE) &&
!httpResponse_->getHttpRequest()->authenticationUsed() &&
getDownloadEngine()->getAuthConfigFactory()->activateBasicCred
(getRequest()->getHost(), getRequest()->getPort(),
getRequest()->getDir(), getOption().get())) {
return prepareForRetry(0);
} else {
throw DL_ABORT_EX2(EX_AUTH_FAILED,
error_code::HTTP_AUTH_FAILED);
}
} else if(statusCode == 404) {
throw DL_ABORT_EX2(MSG_RESOURCE_NOT_FOUND,
error_code::RESOURCE_NOT_FOUND);
} else if(statusCode == 503) {
// Only retry if pretry-wait > 0. Hammering 'busy' server is not
// a good idea.
if(getOption()->getAsInt(PREF_RETRY_WAIT) > 0) {
throw DL_RETRY_EX2(fmt(EX_BAD_STATUS, statusCode),
error_code::HTTP_SERVICE_UNAVAILABLE);
} else {
throw DL_ABORT_EX2(fmt(EX_BAD_STATUS, statusCode),
error_code::HTTP_SERVICE_UNAVAILABLE);
}
} else {
throw DL_ABORT_EX2(fmt(EX_BAD_STATUS, statusCode),
error_code::HTTP_PROTOCOL_ERROR);
}
} else {
return prepareForRetry(0);
}
}
void HttpSkipResponseCommand::disableSocketCheck()
{
disableReadCheckSocket();
disableWriteCheckSocket();
}
} // namespace aria2
|
