mirror of https://github.com/aria2/aria2
400 lines
12 KiB
C++
400 lines
12 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2010 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#include "MetalinkParserStateV4Impl.h"
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#include "MetalinkParserStateMachine.h"
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#include "RecoverableException.h"
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#include "MetalinkResource.h"
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#include "util.h"
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namespace aria2 {
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namespace {
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const std::string FILE("file");
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const std::string HASH("hash");
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const std::string LANGUAGE("language");
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const std::string LENGTH("length");
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const std::string LOCATION("location");
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const std::string METALINK("metalink");
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// Can't use name VERSION because it is used as a macro.
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const std::string METALINK_VERSION("version");
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const std::string METAURL("metaurl");
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const std::string NAME("name");
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const std::string OS("os");
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const std::string PIECE("piece");
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const std::string PIECES("pieces");
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const std::string PRIORITY("priority");
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const std::string SIGNATURE("signature");
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const std::string SIZE("size");
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const std::string TYPE("type");
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const std::string MEDIATYPE("mediatype");
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const std::string URL("url");
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}
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const std::string METALINK4_NAMESPACE_URI("urn:ietf:params:xml:ns:metalink");
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namespace {
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class FindAttr {
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private:
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const std::string& localname_;
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public:
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FindAttr(const std::string& localname):localname_(localname) {}
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bool operator()(const XmlAttr& attr) const
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{
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return attr.localname == localname_ &&
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(attr.nsUri.empty() || attr.nsUri == METALINK4_NAMESPACE_URI);
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}
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};
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}
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template<typename Container>
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static typename Container::const_iterator findAttr
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(const Container& attrs, const std::string& localname)
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{
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return std::find_if(attrs.begin(), attrs.end(), FindAttr(localname));
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}
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void MetalinkMetalinkParserStateV4::beginElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::vector<XmlAttr>& attrs)
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{
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if(nsUri == METALINK4_NAMESPACE_URI && localname == FILE) {
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stm->setFileStateV4();
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, NAME);
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if(itr == attrs.end() || (*itr).value.empty()) {
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stm->logError("Missing file@name");
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return;
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} else if(util::detectDirTraversal((*itr).value)) {
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stm->logError("Bad file@name");
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return;
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}
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stm->newEntryTransaction();
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stm->setFileNameOfEntry((*itr).value);
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} else {
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stm->setSkipTagState();
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}
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}
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void FileMetalinkParserStateV4::beginElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::vector<XmlAttr>& attrs)
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{
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if(nsUri != METALINK4_NAMESPACE_URI) {
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stm->setSkipTagState();
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} else if(localname == SIZE) {
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stm->setSizeStateV4();
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} else if(localname == METALINK_VERSION) {
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stm->setVersionStateV4();
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} else if(localname == LANGUAGE) {
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stm->setLanguageStateV4();
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} else if(localname == OS) {
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stm->setOSStateV4();
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} else if(localname == METAURL) {
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stm->setMetaurlStateV4();
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std::string name;
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{
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, NAME);
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if(itr != attrs.end()) {
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if((*itr).value.empty() || util::detectDirTraversal((*itr).value)) {
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stm->logError("Bad metaurl@name");
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return;
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} else {
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name = (*itr).value;
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}
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}
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}
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int priority;
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{
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, PRIORITY);
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if(itr == attrs.end()) {
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priority = MetalinkResource::getLowestPriority();
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} else {
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try {
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priority = util::parseInt((*itr).value);
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if(priority < 1 || MetalinkResource::getLowestPriority() < priority) {
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stm->logError("metaurl@priority is out of range");
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return;
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}
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} catch(RecoverableException& e) {
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stm->logError("Bad metaurl@priority");
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return;
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}
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}
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}
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std::string mediatype;
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{
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, MEDIATYPE);
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if(itr == attrs.end() || (*itr).value.empty()) {
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stm->logError("Missing metaurl@mediatype");
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return;
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} else {
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mediatype = (*itr).value;
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}
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}
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stm->newMetaurlTransaction();
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stm->setPriorityOfMetaurl(priority);
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stm->setMediatypeOfMetaurl(mediatype);
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stm->setNameOfMetaurl(name);
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} else if(localname == URL) {
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stm->setURLStateV4();
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std::string location;
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{
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, LOCATION);
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if(itr != attrs.end()) {
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location = (*itr).value;
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}
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}
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int priority;
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{
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, PRIORITY);
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if(itr == attrs.end()) {
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priority = MetalinkResource::getLowestPriority();
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} else {
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try {
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priority = util::parseInt((*itr).value);
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if(priority < 1 || MetalinkResource::getLowestPriority() < priority) {
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stm->logError("url@priority is out of range");
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return;
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}
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} catch(RecoverableException& e) {
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stm->logError("Bad url@priority");
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return;
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}
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}
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}
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stm->newResourceTransaction();
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stm->setLocationOfResource(location);
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stm->setPriorityOfResource(priority);
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}
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#ifdef ENABLE_MESSAGE_DIGEST
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else if(localname == HASH) {
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stm->setHashStateV4();
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, TYPE);
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if(itr == attrs.end() || (*itr).value.empty()) {
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stm->logError("Missing hash@type");
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return;
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} else {
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std::string type = (*itr).value;
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stm->newChecksumTransaction();
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stm->setTypeOfChecksum(type);
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}
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} else if(localname == PIECES) {
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stm->setPiecesStateV4();
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size_t length;
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{
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, LENGTH);
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if(itr == attrs.end() || (*itr).value.empty()) {
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stm->logError("Missing pieces@length");
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return;
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} else {
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try {
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length = util::parseInt((*itr).value);
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} catch(RecoverableException& e) {
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stm->logError("Bad pieces@length");
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return;
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}
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}
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}
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std::string type;
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{
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, TYPE);
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if(itr == attrs.end() || (*itr).value.empty()) {
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stm->logError("Missing pieces@type");
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return;
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} else {
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type = (*itr).value;
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}
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}
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stm->newChunkChecksumTransactionV4();
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stm->setLengthOfChunkChecksumV4(length);
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stm->setTypeOfChunkChecksumV4(type);
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}
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#endif // ENABLE_MESSAGE_DIGEST
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else if(localname == SIGNATURE) {
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stm->setSignatureStateV4();
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std::vector<XmlAttr>::const_iterator itr = findAttr(attrs, MEDIATYPE);
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if(itr == attrs.end() || (*itr).value.empty()) {
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stm->logError("Missing signature@mediatype");
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return;
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}
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stm->newSignatureTransaction();
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stm->setTypeOfSignature((*itr).value);
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} else {
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stm->setSkipTagState();
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}
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}
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void FileMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->commitEntryTransaction();
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}
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void SizeMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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try {
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stm->setFileLengthOfEntry(util::parseULLInt(characters));
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} catch(RecoverableException& e) {
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stm->cancelEntryTransaction();
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stm->logError("Bad size");
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}
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}
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void VersionMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->setVersionOfEntry(characters);
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}
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void LanguageMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->setLanguageOfEntry(characters);
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}
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void OSMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->setOSOfEntry(characters);
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}
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void HashMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->setHashOfChecksum(characters);
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stm->commitChecksumTransaction();
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}
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void PiecesMetalinkParserStateV4::beginElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::vector<XmlAttr>& attrs)
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{
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if(nsUri == METALINK4_NAMESPACE_URI && localname == HASH) {
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stm->setPieceHashStateV4();
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} else {
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stm->setSkipTagState();
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}
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}
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void PiecesMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->commitChunkChecksumTransactionV4();
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}
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void PieceHashMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->addHashOfChunkChecksumV4(characters);
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}
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void SignatureMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->setBodyOfSignature(characters);
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stm->commitSignatureTransaction();
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}
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void URLMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->setURLOfResource(characters);
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stm->commitResourceTransaction();
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}
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void MetaurlMetalinkParserStateV4::endElement
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(MetalinkParserStateMachine* stm,
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const std::string& localname,
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const std::string& prefix,
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const std::string& nsUri,
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const std::string& characters)
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{
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stm->setURLOfMetaurl(characters);
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stm->commitMetaurlTransaction();
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}
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} // namespace aria2
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