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Drop support for "BC Link" format

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The format is marked obsolete on 2009.12.28 and has been replaced by magnet links.

http://wiki.bitcomet.com/inside_bitcomet#bc_link_format_obsoleted_as_of_v117
https://www.bitcomet.com/en/changelog
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Chocobo1 2018-12-28 12:32:45 +08:00
commit 19d6de795c
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1 changed files with 18 additions and 27 deletions
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45
src/base/bittorrent/magneturi.cpp
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@ -31,29 +31,26 @@
#include <libtorrent/bencode.hpp> #include <libtorrent/bencode.hpp>
#include <libtorrent/error_code.hpp> #include <libtorrent/error_code.hpp>
#include <libtorrent/magnet_uri.hpp> #include <libtorrent/magnet_uri.hpp>
#include <libtorrent/sha1_hash.hpp>
#include <QByteArray>
#include <QRegularExpression> #include <QRegularExpression>
#include <QStringList>
#include "base/utils/string.h"
namespace namespace
{ {
QString bcLinkToMagnet(QString bcLink) bool isBitTorrentInfoHash(const QString &string)
{ {
QByteArray rawBc = bcLink.toUtf8(); // There are 2 represenations for BitTorrent info hash:
rawBc = rawBc.mid(8); // skip bc://bt/ // 1. 40 chars hex-encoded string
rawBc = QByteArray::fromBase64(rawBc); // Decode base64 // == 20 (SHA-1 length in bytes) * 2 (each byte maps to 2 hex characters)
// Format is now AA/url_encoded_filename/size_bytes/info_hash/ZZ // 2. 32 chars Base32 encoded string
QStringList parts = QString(rawBc).split('/'); // == 20 (SHA-1 length in bytes) * 1.6 (the efficiency of Base32 encoding)
if (parts.size() != 5) return QString(); const int SHA1_HEX_SIZE = libtorrent::sha1_hash::size * 2;
const int SHA1_BASE32_SIZE = libtorrent::sha1_hash::size * 1.6;
QString filename = parts.at(1); return ((((string.size() == SHA1_HEX_SIZE))
QString hash = parts.at(3); && !string.contains(QRegularExpression(QLatin1String("[^0-9A-Fa-f]"))))
QString magnet = "magnet:?xt=urn:btih:" + hash; || ((string.size() == SHA1_BASE32_SIZE)
magnet += "&dn=" + filename; && !string.contains(QRegularExpression(QLatin1String("[^2-7A-Za-z]")))));
return magnet;
} }
} }
@ -66,17 +63,11 @@ MagnetUri::MagnetUri(const QString &source)
{ {
if (source.isEmpty()) return; if (source.isEmpty()) return;
if (source.startsWith("bc://bt/", Qt::CaseInsensitive)) { if (isBitTorrentInfoHash(source))
qDebug("Creating magnet link from bc link"); m_url = QLatin1String("magnet:?xt=urn:btih:") + source;
m_url = bcLinkToMagnet(source);
}
else if (((source.size() == 40) && !source.contains(QRegularExpression("[^0-9A-Fa-f]")))
|| ((source.size() == 32) && !source.contains(QRegularExpression("[^2-7A-Za-z]")))) {
m_url = "magnet:?xt=urn:btih:" + source;
}
libt::error_code ec; libt::error_code ec;
libt::parse_magnet_uri(m_url.toUtf8().constData(), m_addTorrentParams, ec); libt::parse_magnet_uri(m_url.toStdString(), m_addTorrentParams, ec);
if (ec) return; if (ec) return;
m_valid = true; m_valid = true;
@ -84,10 +75,10 @@ MagnetUri::MagnetUri(const QString &source)
m_name = QString::fromStdString(m_addTorrentParams.name); m_name = QString::fromStdString(m_addTorrentParams.name);
for (const std::string &tracker : m_addTorrentParams.trackers) for (const std::string &tracker : m_addTorrentParams.trackers)
m_trackers.append(QString::fromStdString(tracker)); m_trackers.append(TrackerEntry(tracker));
for (const std::string &urlSeed : m_addTorrentParams.url_seeds) for (const std::string &urlSeed : m_addTorrentParams.url_seeds)
m_urlSeeds.append(QUrl(urlSeed.c_str())); m_urlSeeds.append(QUrl(QString::fromStdString(urlSeed)));
} }
bool MagnetUri::isValid() const bool MagnetUri::isValid() const