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/***************************************************************************
* *
* 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 3 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "dcpp/stdinc.h"
#include "magnet.h"
#include "dcpp/StringTokenizer.h"
#include "dcpp/Text.h"
#include "dcpp/Util.h"
namespace dcpp {
bool magnet::parseUri(const string& uri, StringMap& params) {
if(::strncmp(uri.c_str(), "magnet:?", 8)) {
return false;
}
// Widely used parameters:
// xt = eXact Topic — URN containing file hash
// xs = eXact Source — P2P link
// as = Acceptable Source — web link to file on the Internet
// dn = Display Name — file name
// kt = Keyword Topic — search keywords
// xl = eXact Length — real file size in bytes
// dl = Display Length — size in bytes which should be displayed to user
// mt = Manifest Topic — link to a metafile that contains a list of magnets (MAGMA)
// tr = TRacker — tracker address for BitTorrent clients
StringTokenizer<string> mag(uri.substr(8), '&');
StringMap hashes;
string type, param;
for(auto& idx : mag.getTokens()) {
auto pos = idx.find('=');
if(pos != string::npos) {
type = Text::toLower(Util::encodeURI(idx.substr(0, pos), true));
param = Util::encodeURI(idx.substr(pos + 1), true);
} else {
type = Util::encodeURI(idx, true);
param.clear();
}
static const StringSet supportedParams = { "dn", "kt", "xl", "dl", "mt", "tr" };
// extract what is of value
if(param.size() == 85 && ::strncmp(param.c_str(), "urn:bitprint:", 13) == 0) {
hashes[type] = param.substr(46);
} else if(param.size() == 54 && ::strncmp(param.c_str(), "urn:tree:tiger:", 15) == 0) {
hashes[type] = param.substr(15);
} else if(param.size() == 55 && ::strncmp(param.c_str(), "urn:tree:tiger/:", 16) == 0) {
hashes[type] = param.substr(16);
} else if(param.size() == 59 && ::strncmp(param.c_str(), "urn:tree:tiger/1024:", 20) == 0) {
hashes[type] = param.substr(20);
} else if(param.size() == 49 && ::strncmp(param.c_str(), "urn:btih:", 9) == 0) {
hashes[type] = param.substr(9);
} else if(param.size() == 77 && ::strncmp(param.c_str(), "urn:btmh:", 9) == 0) {
hashes[type] = param.substr(9);
} else if(type.size() == 2 && supportedParams.find(type) != supportedParams.end()) {
params[type] = param;
}
}
static const StringSet specialParams = { "xt", "xs", "as" };
// add special params
for(auto& key : specialParams) {
if(hashes.find(key) != hashes.end()) {
params[key] = hashes[key];
}
}
if(!params["xt"].empty() || !params["xs"].empty() || !params["as"].empty() || !params["kt"].empty()) {
return true;
}
return false;
}
} // namespace dcpp
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