mirror of https://github.com/aria2/aria2
438 lines
12 KiB
C++
438 lines
12 KiB
C++
/* <!-- copyright */
|
|
/*
|
|
* aria2 - The high speed download utility
|
|
*
|
|
* Copyright (C) 2010 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 "MetalinkParserStateV3Impl.h"
|
|
#include "MetalinkParserStateMachine.h"
|
|
#include "RecoverableException.h"
|
|
#include "MetalinkResource.h"
|
|
#include "util.h"
|
|
|
|
namespace aria2 {
|
|
|
|
namespace {
|
|
|
|
const std::string FILE("file");
|
|
const std::string FILES("files");
|
|
const std::string HASH("hash");
|
|
const std::string LANGUAGE("language");
|
|
const std::string LENGTH("length");
|
|
const std::string LOCATION("location");
|
|
const std::string MAXCONNECTIONS("maxconnections");
|
|
// Can't use name VERSION because it is used as a macro.
|
|
const std::string METALINK_VERSION("version");
|
|
const std::string NAME("name");
|
|
const std::string OS("os");
|
|
const std::string PIECE("piece");
|
|
const std::string PIECES("pieces");
|
|
const std::string PREFERENCE("preference");
|
|
const std::string RESOURCES("resources");
|
|
const std::string SIGNATURE("signature");
|
|
const std::string SIZE("size");
|
|
const std::string TYPE("type");
|
|
const std::string URL("url");
|
|
const std::string VERIFICATION("verification");
|
|
}
|
|
|
|
const std::string METALINK3_NAMESPACE_URI("http://www.metalinker.org/");
|
|
|
|
namespace {
|
|
class FindAttr {
|
|
private:
|
|
const std::string& localname_;
|
|
public:
|
|
FindAttr(const std::string& localname):localname_(localname) {}
|
|
|
|
bool operator()(const XmlAttr& attr) const
|
|
{
|
|
return attr.localname == localname_ &&
|
|
(attr.nsUri.empty() || attr.nsUri == METALINK3_NAMESPACE_URI);
|
|
}
|
|
};
|
|
}
|
|
|
|
template<typename Container>
|
|
static typename Container::const_iterator findAttr
|
|
(const Container& attrs, const std::string& localname)
|
|
{
|
|
return std::find_if(attrs.begin(), attrs.end(), FindAttr(localname));
|
|
}
|
|
|
|
void MetalinkMetalinkParserState::beginElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::vector<XmlAttr>& attrs)
|
|
{
|
|
if(nsUri == METALINK3_NAMESPACE_URI && localname == FILES) {
|
|
stm->setFilesState();
|
|
} else {
|
|
stm->setSkipTagState();
|
|
}
|
|
}
|
|
|
|
void FilesMetalinkParserState::beginElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::vector<XmlAttr>& attrs)
|
|
{
|
|
if(nsUri == METALINK3_NAMESPACE_URI && localname == FILE) {
|
|
stm->setFileState();
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, NAME);
|
|
if(itr != attrs.end()) {
|
|
std::string name = util::trim((*itr).value);
|
|
if(name.empty() || util::detectDirTraversal(name)) {
|
|
return;
|
|
}
|
|
stm->newEntryTransaction();
|
|
stm->setFileNameOfEntry(name);
|
|
}
|
|
} else {
|
|
stm->setSkipTagState();
|
|
}
|
|
}
|
|
|
|
void FileMetalinkParserState::beginElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::vector<XmlAttr>& attrs)
|
|
{
|
|
if(nsUri != METALINK3_NAMESPACE_URI) {
|
|
stm->setSkipTagState();
|
|
} else if(localname == SIZE) {
|
|
stm->setSizeState();
|
|
} else if(localname == METALINK_VERSION) {
|
|
stm->setVersionState();
|
|
} else if(localname == LANGUAGE) {
|
|
stm->setLanguageState();
|
|
} else if(localname == OS) {
|
|
stm->setOSState();
|
|
} else if(localname == VERIFICATION) {
|
|
stm->setVerificationState();
|
|
} else if(localname == RESOURCES) {
|
|
stm->setResourcesState();
|
|
int maxConnections;
|
|
{
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs,MAXCONNECTIONS);
|
|
if(itr == attrs.end()) {
|
|
maxConnections = -1;
|
|
} else {
|
|
try {
|
|
maxConnections = util::parseInt((*itr).value);
|
|
} catch(RecoverableException& e) {
|
|
maxConnections = -1;
|
|
}
|
|
}
|
|
}
|
|
stm->setMaxConnectionsOfEntry(maxConnections);
|
|
} else {
|
|
stm->setSkipTagState();
|
|
}
|
|
}
|
|
|
|
void FileMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->commitEntryTransaction();
|
|
}
|
|
|
|
void SizeMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
try {
|
|
stm->setFileLengthOfEntry(util::parseULLInt(characters));
|
|
} catch(RecoverableException& e) {
|
|
// current metalink specification doesn't require size element.
|
|
}
|
|
}
|
|
|
|
void VersionMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->setVersionOfEntry(util::trim(characters));
|
|
}
|
|
|
|
void LanguageMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->setLanguageOfEntry(util::trim(characters));
|
|
}
|
|
|
|
void OSMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->setOSOfEntry(util::trim(characters));
|
|
}
|
|
|
|
void VerificationMetalinkParserState::beginElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::vector<XmlAttr>& attrs)
|
|
{
|
|
if(nsUri != METALINK3_NAMESPACE_URI) {
|
|
stm->setSkipTagState();
|
|
} else
|
|
#ifdef ENABLE_MESSAGE_DIGEST
|
|
if(localname == HASH) {
|
|
stm->setHashState();
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, TYPE);
|
|
if(itr == attrs.end()) {
|
|
return;
|
|
} else {
|
|
std::string type = util::trim((*itr).value);
|
|
stm->newChecksumTransaction();
|
|
stm->setTypeOfChecksum(type);
|
|
}
|
|
} else if(localname == PIECES) {
|
|
stm->setPiecesState();
|
|
try {
|
|
size_t length;
|
|
{
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, LENGTH);
|
|
if(itr == attrs.end()) {
|
|
return;
|
|
} else {
|
|
length = util::parseInt((*itr).value);
|
|
}
|
|
}
|
|
std::string type;
|
|
{
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, TYPE);
|
|
if(itr == attrs.end()) {
|
|
return;
|
|
} else {
|
|
type = util::trim((*itr).value);
|
|
}
|
|
}
|
|
stm->newChunkChecksumTransaction();
|
|
stm->setLengthOfChunkChecksum(length);
|
|
stm->setTypeOfChunkChecksum(type);
|
|
} catch(RecoverableException& e) {
|
|
stm->cancelChunkChecksumTransaction();
|
|
}
|
|
} else
|
|
#endif // ENABLE_MESSAGE_DIGEST
|
|
if(localname == SIGNATURE) {
|
|
stm->setSignatureState();
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, TYPE);
|
|
if(itr == attrs.end()) {
|
|
return;
|
|
} else {
|
|
stm->newSignatureTransaction();
|
|
stm->setTypeOfSignature(util::trim((*itr).value));
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, FILE);
|
|
if(itr != attrs.end()) {
|
|
std::string file = util::trim((*itr).value);
|
|
if(!util::detectDirTraversal(file)) {
|
|
stm->setFileOfSignature(file);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
stm->setSkipTagState();
|
|
}
|
|
}
|
|
|
|
void HashMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->setHashOfChecksum(util::trim(characters));
|
|
stm->commitChecksumTransaction();
|
|
}
|
|
|
|
void PiecesMetalinkParserState::beginElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::vector<XmlAttr>& attrs)
|
|
{
|
|
if(nsUri == METALINK3_NAMESPACE_URI && localname == HASH) {
|
|
stm->setPieceHashState();
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, PIECE);
|
|
if(itr == attrs.end()) {
|
|
stm->cancelChunkChecksumTransaction();
|
|
} else {
|
|
try {
|
|
stm->createNewHashOfChunkChecksum(util::parseInt((*itr).value));
|
|
} catch(RecoverableException& e) {
|
|
stm->cancelChunkChecksumTransaction();
|
|
}
|
|
}
|
|
} else {
|
|
stm->setSkipTagState();
|
|
}
|
|
}
|
|
|
|
void PiecesMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->commitChunkChecksumTransaction();
|
|
}
|
|
|
|
void PieceHashMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->setMessageDigestOfChunkChecksum(util::trim(characters));
|
|
stm->addHashOfChunkChecksum();
|
|
}
|
|
|
|
void SignatureMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->setBodyOfSignature(util::trim(characters));
|
|
stm->commitSignatureTransaction();
|
|
}
|
|
|
|
void ResourcesMetalinkParserState::beginElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::vector<XmlAttr>& attrs)
|
|
{
|
|
if(nsUri != METALINK3_NAMESPACE_URI) {
|
|
stm->setSkipTagState();
|
|
} else if(localname == URL) {
|
|
stm->setURLState();
|
|
std::string type;
|
|
{
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, TYPE);
|
|
if(itr == attrs.end()) {
|
|
return;
|
|
} else {
|
|
type = util::trim((*itr).value);
|
|
}
|
|
}
|
|
std::string location;
|
|
{
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, LOCATION);
|
|
if(itr != attrs.end()) {
|
|
location = util::trim((*itr).value);
|
|
}
|
|
}
|
|
int preference;
|
|
{
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, PREFERENCE);
|
|
if(itr == attrs.end()) {
|
|
preference = MetalinkResource::getLowestPriority();
|
|
} else {
|
|
try {
|
|
// In Metalink3Spec, highest prefernce value is 100. We
|
|
// uses Metalink4Spec priority unit system in which 1 is
|
|
// higest.
|
|
preference = 101-util::parseInt((*itr).value);
|
|
} catch(RecoverableException& e) {
|
|
preference = MetalinkResource::getLowestPriority();
|
|
}
|
|
}
|
|
}
|
|
int maxConnections;
|
|
{
|
|
std::vector<XmlAttr>::const_iterator itr = findAttr(attrs,MAXCONNECTIONS);
|
|
if(itr == attrs.end()) {
|
|
maxConnections = -1;
|
|
} else {
|
|
try {
|
|
maxConnections = util::parseInt((*itr).value);
|
|
} catch(RecoverableException& e) {
|
|
maxConnections = -1;
|
|
}
|
|
}
|
|
}
|
|
stm->newResourceTransaction();
|
|
stm->setTypeOfResource(type);
|
|
stm->setLocationOfResource(location);
|
|
stm->setPriorityOfResource(preference);
|
|
stm->setMaxConnectionsOfResource(maxConnections);
|
|
} else {
|
|
stm->setSkipTagState();
|
|
}
|
|
}
|
|
|
|
void URLMetalinkParserState::endElement
|
|
(MetalinkParserStateMachine* stm,
|
|
const std::string& localname,
|
|
const std::string& prefix,
|
|
const std::string& nsUri,
|
|
const std::string& characters)
|
|
{
|
|
stm->setURLOfResource(util::trim(characters));
|
|
stm->commitResourceTransaction();
|
|
}
|
|
|
|
} // namespace aria2
|