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/* <!-- 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"
namespace aria2 {
HttpSkipResponseCommand::HttpSkipResponseCommand
(cuid_t cuid,
const SharedHandle<Request>& req,
const SharedHandle<FileEntry>& fileEntry,
RequestGroup* requestGroup,
const SharedHandle<HttpConnection>& httpConnection,
const SharedHandle<HttpResponse>& httpResponse,
DownloadEngine* e,
const SharedHandle<SocketCore>& s)
: AbstractCommand(cuid, req, fileEntry, requestGroup, e, s),
httpConnection_(httpConnection),
httpResponse_(httpResponse),
streamFilter_(new NullSinkStreamFilter()),
sinkFilterOnly_(true),
totalLength_(httpResponse_->getEntityLength()),
receivedBytes_(0)
{}
HttpSkipResponseCommand::~HttpSkipResponseCommand() {}
void HttpSkipResponseCommand::installStreamFilter
(const SharedHandle<StreamFilter>& streamFilter)
{
if(!streamFilter) {
return;
}
streamFilter->installDelegate(streamFilter_);
streamFilter_ = streamFilter;
sinkFilterOnly_ =
util::endsWith(streamFilter_->getName(), 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();
}
const size_t BUFSIZE = 16*1024;
unsigned char buf[BUFSIZE];
size_t bufSize;
if(sinkFilterOnly_ && totalLength_ > 0) {
bufSize = totalLength_-receivedBytes_;
} else {
bufSize = BUFSIZE;
}
try {
if(sinkFilterOnly_) {
getSocket()->readData(buf, bufSize);
receivedBytes_ += bufSize;
} else {
getSocket()->peekData(buf, bufSize);
// receivedBytes_ is not updated if transferEncoding is set.
// The return value is safely ignored here.
streamFilter_->transform(SharedHandle<BinaryStream>(),
SharedHandle<Segment>(),
buf, bufSize);
bufSize = streamFilter_->getBytesProcessed();
getSocket()->readData(buf, bufSize);
}
if(totalLength_ != 0 && bufSize == 0 &&
!getSocket()->wantRead() && !getSocket()->wantWrite()) {
throw DL_RETRY_EX(EX_GOT_EOF);
}
} catch(RecoverableException& e) {
A2_LOG_DEBUG_EX(EX_EXCEPTION_CAUGHT, e)
return processResponse();
}
bool finished = false;
if(sinkFilterOnly_) {
if(bufSize == 0) {
if(!getSocket()->wantRead() && !getSocket()->wantWrite()) {
return processResponse();
}
} else {
finished = (totalLength_ == receivedBytes_);
}
} else {
finished = streamFilter_->finished();
}
if(finished) {
poolConnection();
return processResponse();
} else {
setWriteCheckSocketIf(getSocket(), getSocket()->wantWrite());
getDownloadEngine()->addCommand(this);
return false;
}
}
void HttpSkipResponseCommand::poolConnection() const
{
if(getRequest()->supportsPersistentConnection()) {
getDownloadEngine()->poolSocket
(getRequest(), createProxyRequest(), getSocket());
}
}
bool HttpSkipResponseCommand::processResponse()
{
int statusCode;
if(httpResponse_->isRedirect()) {
unsigned 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()->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 {
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
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