307 lines
10 KiB
C++
307 lines
10 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2013 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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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 GNU
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "streamfetcher.h"
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#include "networkaccessmanager.h"
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#include "mpdconnection.h"
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#include "mpdparseutils.h"
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#include "streamsmodel.h"
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#include "localize.h"
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#include <QRegExp>
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#include <QUrl>
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#include <QXmlStreamReader>
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#include <QDebug>
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static bool debugEnabled=false;
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#define DBUG if (debugEnabled) qWarning() << "StreamFetcher" << __FUNCTION__
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void StreamFetcher::enableDebug()
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{
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debugEnabled=true;
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}
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static const int constMaxRedirects = 3;
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static const int constMaxData = 1024;
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static const int constTimeout = 3*1000;
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static QString parsePlaylist(const QByteArray &data, const QString &key, const QSet<QString> &handlers)
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{
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QStringList lines=QString(data).split('\n', QString::SkipEmptyParts);
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foreach (QString line, lines) {
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if (line.startsWith(key, Qt::CaseInsensitive)) {
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foreach (const QString &handler, handlers) {
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QString protocol(handler+QLatin1String("://"));
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int index=line.indexOf(protocol, Qt::CaseInsensitive);
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if (index>-1 && index<7) {
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line.remove('\n');
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line.remove('\r');
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return line.mid(index);
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}
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}
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}
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}
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return QString();
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}
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static QString parseExt3Mu(const QByteArray &data, const QSet<QString> &handlers)
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{
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QStringList lines=QString(data).split(QRegExp(QLatin1String("(\r\n|\n|\r)")), QString::SkipEmptyParts);
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foreach (QString line, lines) {
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foreach (const QString &handler, handlers) {
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QString protocol(handler+QLatin1String("://"));
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if (line.startsWith(protocol, Qt::CaseInsensitive)) {
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line.remove('\n');
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line.remove('\r');
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return line;
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}
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}
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}
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return QString();
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}
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static QString parseAsx(const QByteArray &data, const QSet<QString> &handlers)
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{
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QStringList lines=QString(data).split(QRegExp(QLatin1String("(\r\n|\n|\r|/>)")), QString::SkipEmptyParts);
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foreach (QString line, lines) {
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int ref=line.indexOf(QLatin1String("<ref href"), Qt::CaseInsensitive);
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if (-1!=ref) {
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foreach (const QString &handler, handlers) {
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QString protocol(handler+QLatin1String("://"));
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int prot=line.indexOf(protocol, Qt::CaseInsensitive);
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if (-1!=prot) {
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QStringList parts=line.split('\"');
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foreach (QString part, parts) {
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if (part.startsWith(protocol)) {
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return part;
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}
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}
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}
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}
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}
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}
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return QString();
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}
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static QString parseXml(const QByteArray &data, const QSet<QString> &handlers)
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{
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// XSPF / SPIFF
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QXmlStreamReader reader(data);
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while (!reader.atEnd()) {
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reader.readNext();
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if (QXmlStreamReader::StartElement==reader.tokenType() && QLatin1String("location")==reader.name()) {
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QString loc=reader.readElementText().trimmed();
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foreach (const QString &handler, handlers) {
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if (loc.startsWith(handler+QLatin1String("://"))) {
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return loc;
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}
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}
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}
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}
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return QString();
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}
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static QString parse(const QByteArray &data)
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{
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QSet<QString> handlers=MPDConnection::self()->urlHandlers();
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if (data.length()>10 && !strncasecmp(data.constData(), "[playlist]", 10)) {
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DBUG << "playlist";
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return parsePlaylist(data, QLatin1String("File"), handlers);
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} else if (data.length()>7 && (!strncasecmp(data.constData(), "#EXTM3U", 7) || !strncasecmp(data.constData(), "http://", 7))) {
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DBUG << "ext3mu";
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return parseExt3Mu(data, handlers);
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} else if (data.length()>5 && !strncasecmp(data.constData(), "<asx ", 5)) {
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DBUG << "asx";
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return parseAsx(data, handlers);
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} else if (data.length()>11 && !strncasecmp(data.constData(), "[reference]", 11)) {
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DBUG << "playlist/ref";
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return parsePlaylist(data, QLatin1String("Ref"), handlers);
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} else if (data.length()>5 && !strncasecmp(data.constData(), "<?xml", 5)) {
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DBUG << "xml";
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return parseXml(data, handlers);
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} else if ( (-1==data.indexOf("<html") && -1!=data.indexOf("http:/")) || // flat list?
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(-1!=data.indexOf("#EXTM3U")) ) { // m3u with comments?
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DBUG << "ext3mu/2";
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return parseExt3Mu(data, handlers);
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} else if (data.startsWith("http://")) {
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QStringList lines=QString(data).split(QRegExp(QLatin1String("(\r\n|\n|\r)")), QString::SkipEmptyParts);
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if (!lines.isEmpty()) {
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DBUG << "http";
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return lines.first();
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}
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}
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return QString();
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}
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StreamFetcher::StreamFetcher(QObject *p)
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: QObject(p)
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, job(0)
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{
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}
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StreamFetcher::~StreamFetcher()
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{
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}
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void StreamFetcher::get(const QStringList &items, int insertRow, bool replace, quint8 priority)
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{
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if (items.isEmpty()) {
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return;
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}
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DBUG << "get" << items;
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cancel();
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todo=items;
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done.clear();
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row=insertRow;
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replacePlayQueue=replace;
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prio=priority;
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current=QString();
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currentName=QString();
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doNext();
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}
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void StreamFetcher::doNext()
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{
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redirects=0;
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while (todo.count()) {
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current=todo.takeFirst();
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QUrl u(current);
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currentName=MPDParseUtils::getStreamName(current);
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emit status(i18n("Fetching %1").arg(currentName.isEmpty() ? u.toString() : currentName));
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if (!currentName.isEmpty()) {
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current=current.left(current.length()-(currentName.length()+1));
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}
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if (u.scheme().startsWith(StreamsModel::constPrefix)) {
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data.clear();
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u.setScheme("http");
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job=NetworkAccessManager::self()->get(u, constTimeout);
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DBUG << "Check" << u.toString();
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connect(job, SIGNAL(readyRead()), this, SLOT(dataReady()));
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connect(job, SIGNAL(finished()), this, SLOT(jobFinished()));
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return;
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} else {
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DBUG << "use orig" << current;
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done.append(MPDParseUtils::addStreamName(current, currentName));
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}
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}
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if (todo.isEmpty() && !done.isEmpty()) {
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job=0;
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emit result(done, row, replacePlayQueue, prio);
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emit status(QString());
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}
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}
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void StreamFetcher::cancel()
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{
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todo.clear();
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done.clear();
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row=0;
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data.clear();
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current=QString();
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if (job) {
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disconnect(job, SIGNAL(readyRead()), this, SLOT(dataReady()));
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disconnect(job, SIGNAL(finished()), this, SLOT(jobFinished()));
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job->abort();
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job->deleteLater();
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}
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job=0;
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emit status(QString());
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}
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void StreamFetcher::dataReady()
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{
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data+=job->readAll();
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if (data.count()>constMaxData) {
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QNetworkReply *thisJob=job;
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disconnect(thisJob, SIGNAL(readyRead()), this, SLOT(dataReady()));
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disconnect(thisJob, SIGNAL(finished()), this, SLOT(jobFinished()));
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jobFinished(thisJob);
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thisJob->abort();
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thisJob->deleteLater();
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}
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}
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void StreamFetcher::jobFinished()
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{
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QNetworkReply *reply=qobject_cast<QNetworkReply *>(sender());
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if (reply) {
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jobFinished(reply);
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}
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}
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void StreamFetcher::jobFinished(QNetworkReply *reply)
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{
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// We only handle 1 job at a time!
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if (reply==job) {
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bool redirected=false;
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if (!reply->error()) {
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QVariant redirect = reply->header(QNetworkRequest::LocationHeader);
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if (redirect.isValid() && ++redirects<constMaxRedirects) {
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current=redirect.toString();
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DBUG << "real redirect" << current;
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data.clear();
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job=NetworkAccessManager::self()->get(current, constTimeout);
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connect(job, SIGNAL(readyRead()), this, SLOT(dataReady()));
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connect(job, SIGNAL(finished()), this, SLOT(jobFinished()));
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redirected=true;
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} else {
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QString u=parse(data);
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if (u.isEmpty() || u==current) {
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DBUG << "use (empty/current)" << current;
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done.append(MPDParseUtils::addStreamName(current.startsWith(StreamsModel::constPrefix) ? current.mid(StreamsModel::constPrefix.length()) : current, currentName));
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} else if (u.startsWith(QLatin1String("http://")) && ++redirects<constMaxRedirects) {
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// Redirect...
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current=u;
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DBUG << "semi-redirect" << current;
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data.clear();
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job=NetworkAccessManager::self()->get(u, constTimeout);
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connect(job, SIGNAL(readyRead()), this, SLOT(dataReady()));
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connect(job, SIGNAL(finished()), this, SLOT(jobFinished()));
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redirected=true;
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} else {
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DBUG << "use" << u;
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done.append(MPDParseUtils::addStreamName(u, currentName));
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}
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}
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} else {
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DBUG << "error " << reply->errorString() << " - use" << current;
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done.append(MPDParseUtils::addStreamName(current.startsWith(StreamsModel::constPrefix) ? current.mid(StreamsModel::constPrefix.length()) : current, currentName));
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}
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if (!redirected) {
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doNext();
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}
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}
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reply->deleteLater();
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}
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