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mediaplaylist_m3u8.cpp
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mediaplaylist_m3u8.cpp
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#include "mediaplaylist_m3u8.h"
#include <QDir>
#include <QFileInfo>
#include <QLoggingCategory>
#include <QNetworkReply>
#include <QUrl>
#include <chunk.h>
Q_LOGGING_CATEGORY(media_M3U8, "media")
MediaPlaylistM3U8::MediaPlaylistM3U8(const QUrl &url, const QString &dir, QObject *parent)
: QObject{parent}
, m_url(url)
, m_effectiveUrl(url)
, m_file(QString("%1/%2").arg(dir).arg(m_url.fileName()))
, m_uuid(QUuid::createUuid())
, m_dir(dir)
{
qCDebug(media_M3U8) << "save to" << m_file.fileName();
if (!url.isValid()) {
qCDebug(media_M3U8) << "invalid url:" << url;
throw std::invalid_argument("invalid url");
}
}
bool MediaPlaylistM3U8::request()
{
QNetworkRequest request(m_url);
// TODO
// request.setTransferTimeout(1000);
auto it = m_requestHeaders.cbegin();
while (it != m_requestHeaders.cend()) {
request.setRawHeader(it.key(), it.value());
qCDebug(media_M3U8) << it.key() << ":" << it.value();
++it;
}
qCDebug(media_M3U8) << "GET" << m_url.toString();
m_reply = m_qnam.get(request);
connect(m_reply, &QNetworkReply::finished, this, &MediaPlaylistM3U8::replyFinished);
connect(m_reply, &QIODevice::readyRead, this, &MediaPlaylistM3U8::replyReadyRead);
connect(m_reply, &QNetworkReply::sslErrors, this, &MediaPlaylistM3U8::sslErrors);
connect(m_reply, &QNetworkReply::errorOccurred, this, &MediaPlaylistM3U8::processErrors);
connect(m_reply, &QNetworkReply::redirected, this, &MediaPlaylistM3U8::replyRedirected);
if (!m_file.open(QIODevice::WriteOnly)) {
qCDebug(media_M3U8) << QString("Unable to save the file %1: %2.")
.arg(QDir::toNativeSeparators(m_file.fileName()))
.arg(m_file.errorString());
replyFinished();
return false;
}
return true;
}
QUuid MediaPlaylistM3U8::uuid() const
{
return m_uuid;
}
QString MediaPlaylistM3U8::fileName() const
{
return m_effectiveUrl.fileName();
}
void MediaPlaylistM3U8::setHeader(const QByteArray &key, const QByteArray &value)
{
m_requestHeaders.insert(key, value);
}
void MediaPlaylistM3U8::replyFinished()
{
m_file.close();
QNetworkReply::NetworkError error = m_reply->error();
const QString &errorString = m_reply->errorString();
m_reply->deleteLater();
m_reply = nullptr;
if (error != QNetworkReply::NoError) {
QFileInfo fi;
fi.setFile(m_file.fileName());
QFile::remove(fi.absoluteFilePath());
qCDebug(media_M3U8) << "error:" << errorString;
}
qCDebug(media_M3U8) << "finished:" << m_url;
processMediaPlaylist();
}
void MediaPlaylistM3U8::replyReadyRead()
{
m_file.write(m_reply->readAll());
}
void MediaPlaylistM3U8::sslErrors(const QList<QSslError> &errors)
{
QString errorString;
for (const QSslError &error : errors) {
if (!errorString.isEmpty())
errorString += '\n';
errorString += error.errorString();
}
qCDebug(media_M3U8) << "TLS Errors, One or more TLS errors has occurred:\n" << errorString;
m_reply->ignoreSslErrors();
}
void MediaPlaylistM3U8::processErrors(QNetworkReply::NetworkError error)
{
qCDebug(media_M3U8) << "has error:" << error;
}
void MediaPlaylistM3U8::replyRedirected(const QUrl &url)
{
qCDebug(media_M3U8) << "redirected to" << url;
m_effectiveUrl = url;
}
void MediaPlaylistM3U8::processMediaPlaylist()
{
QFileInfo fi(m_file.fileName());
QFile playlist(fi.absoluteFilePath());
if (!playlist.open(QIODevice::ReadOnly)) {
qCDebug(media_M3U8) << QString("Unable to open the file %1: %2.")
.arg(fi.absoluteFilePath())
.arg(playlist.errorString());
return;
}
QTextStream in(&playlist);
while (!in.atEnd()) {
const QString &line = in.readLine();
if (line.startsWith("#EXTINF")) {
const QString &chunkAddress = in.readLine();
if (chunkAddress.startsWith("http")) {
// absolute path to media playlist
qCDebug(media_M3U8) << "chunk absolute path not supported";
continue;
}
// relative path to media playlist
QString url = m_effectiveUrl.toString();
url.replace(m_url.fileName(), chunkAddress);
QSharedPointer<Chunk> chunk(new Chunk(url, m_dir));
auto it = m_requestHeaders.cbegin();
while (it != m_requestHeaders.cend()) {
chunk->setHeader(it.key(), it.value());
++it;
}
m_chunkListToDo.insert(chunk->uuid(), chunk);
connect(chunk.get(), &Chunk::resultIsReady, this, &MediaPlaylistM3U8::chunkFinished);
}
}
// запустим @m_maxOpenFiles запросов одновременно
// ограничение из за максимально возможного кол-ва открытых файлов
qCDebug(media_M3U8) << "chunks:" << m_chunkListToDo.size();
int number = m_maxOpenFiles;
auto it = m_chunkListToDo.begin();
while (number > 0) {
if (it == m_chunkListToDo.end()) {
break;
}
m_chunkListInProgress.insert(it.key(), it.value());
m_chunkListToDo.remove(it.key());
--number;
++it;
}
std::for_each(m_chunkListInProgress.begin(), m_chunkListInProgress.end(),
[](const QSharedPointer<Chunk> &p) { p->request(); });
}
void MediaPlaylistM3U8::chunkFinished(const QUuid &chunkUuid)
{
if (!m_chunkListInProgress.contains(chunkUuid)) {
qCDebug(media_M3U8) << "unknown uuid: " << chunkUuid;
return;
}
m_chunkListInProgress.remove(chunkUuid);
if (!m_chunkListToDo.isEmpty()) {
auto nextChunk = m_chunkListToDo.begin();
const auto nextUuid = nextChunk.key();
const auto nextPointer = nextChunk.value();
m_chunkListToDo.remove(nextUuid);
m_chunkListInProgress.insert(nextUuid, nextPointer);
nextPointer->request();
}
if (m_chunkListInProgress.isEmpty()) {
emit resultIsReady(m_uuid);
return;
}
}