/
netstream.cpp
1005 lines (847 loc) · 26.4 KB
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netstream.cpp
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/* Network stream
* Copyright 2011 Lawrence Rust <lvr at softsystem dot co dot uk>
*/
#include "netstream.h"
// C/C++ lib
#include <cstdlib>
using std::getenv;
#include <cstddef>
#include <cstdio>
#include <cinttypes>
#include <utility>
// Qt
#include <QAtomicInt>
#include <QCoreApplication>
#include <QDesktopServices>
#include <QElapsedTimer>
#include <QEvent>
#include <QFile>
#include <QMetaType> // qRegisterMetaType
#include <QMutexLocker>
#include <QNetworkAccessManager>
#include <QNetworkDiskCache>
#include <QNetworkProxy>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QScopedPointer>
#include <QThread>
#include <QUrl>
#ifndef QT_NO_OPENSSL
#include <QSslConfiguration>
#include <QSslError>
#include <QSslSocket>
#include <QSslKey>
#endif
// Myth
#include "mythlogging.h"
#include "mythcorecontext.h"
#include "mythdirs.h"
/*
* Constants
*/
#define LOC "[netstream] "
/*
* Private data
*/
static QAtomicInt s_nRequest(1); // Unique NetStream request ID
static QMutex s_mtx; // Guard local static data e.g. NAMThread singleton
const qint64 kMaxBuffer = 4 * 1024 * 1024L; // 0= unlimited, 1MB => 4secs @ 1.5Mbps
/*
* Private types
*/
// Custom event posted to NAMThread
class NetStreamRequest : public QEvent
{
public:
static const QEvent::Type kType = QEvent::User;
NetStreamRequest(int id, const QNetworkRequest &req) :
QEvent(kType),
m_id(id),
m_req(req),
m_bCancelled(false)
{ }
const int m_id;
const QNetworkRequest m_req;
volatile bool m_bCancelled;
};
class NetStreamAbort : public QEvent
{
public:
static const QEvent::Type kType = static_cast< QEvent::Type >(QEvent::User + 1);
NetStreamAbort(int id, QNetworkReply *reply) :
QEvent(kType),
m_id(id),
m_reply(reply)
{ }
const int m_id;
QNetworkReply * const m_reply;
};
/**
* Network streaming request
*/
NetStream::NetStream(const QUrl &url, EMode mode /*= kPreferCache*/,
QByteArray cert) :
m_id(s_nRequest.fetchAndAddRelaxed(1)),
m_url(url),
m_cert(std::move(cert))
{
setObjectName("NetStream " + url.toString());
m_request.setAttribute(QNetworkRequest::CacheLoadControlAttribute,
mode == kAlwaysCache ? QNetworkRequest::AlwaysCache :
mode == kPreferCache ? QNetworkRequest::PreferCache :
mode == kNeverCache ? QNetworkRequest::AlwaysNetwork :
QNetworkRequest::PreferNetwork );
// Receive requestStarted signals from NAMThread when it processes a NetStreamRequest
connect(&NAMThread::manager(), SIGNAL(requestStarted(int, QNetworkReply*)),
this, SLOT(slotRequestStarted(int, QNetworkReply*)), Qt::DirectConnection );
QMutexLocker locker(&m_mutex);
if (Request(url))
m_state = kPending;
}
// virtual
NetStream::~NetStream()
{
Abort();
(NAMThread::manager()).disconnect(this);
QMutexLocker locker(&m_mutex);
if (m_reply)
{
m_reply->disconnect(this);
m_reply->deleteLater();
}
}
static inline QString Source(const QNetworkRequest &request)
{
switch (request.attribute(QNetworkRequest::CacheLoadControlAttribute).toInt())
{
case QNetworkRequest::AlwaysCache: return "cache";
case QNetworkRequest::PreferCache: return "cache-preferred";
case QNetworkRequest::PreferNetwork: return "net-preferred";
case QNetworkRequest::AlwaysNetwork: return "net";
}
return "unknown";
}
static inline QString Source(const QNetworkReply* reply)
{
return reply->attribute(QNetworkRequest::SourceIsFromCacheAttribute).toBool() ?
"cache" : "host";
}
// Send request to the network manager
// Caller must hold m_mutex
bool NetStream::Request(const QUrl& url)
{
if (!IsSupported(url))
{
LOG(VB_GENERAL, LOG_WARNING, LOC +
QString("(%1) Request unsupported URL: %2")
.arg(m_id).arg(url.toString()) );
return false;
}
if (m_pending)
{
// Cancel the pending request
m_pending->m_bCancelled = true;
m_pending = nullptr;
}
if (m_reply)
{
// Abort the current reply
// NB the abort method appears to only work if called from NAMThread
m_reply->disconnect(this);
NAMThread::PostEvent(new NetStreamAbort(m_id, m_reply));
// NAMthread will delete the reply
m_reply = nullptr;
}
m_request.setUrl(url);
const QByteArray ua("User-Agent");
if (!m_request.hasRawHeader(ua))
m_request.setRawHeader(ua, "UK-MHEG/2 MYT001/001 MHGGNU/001");
if (m_pos > 0 || m_size >= 0)
m_request.setRawHeader("Range", QString("bytes=%1-").arg(m_pos).toLatin1());
#ifndef QT_NO_OPENSSL
if (m_request.url().scheme() == "https")
{
QSslConfiguration ssl(QSslConfiguration::defaultConfiguration());
QList<QSslCertificate> clist;
if (!m_cert.isEmpty())
{
clist = QSslCertificate::fromData(m_cert, QSsl::Der);
if (clist.isEmpty())
LOG(VB_GENERAL, LOG_WARNING, LOC + QString("Invalid certificate: %1")
.arg(m_cert.toPercentEncoding().constData()) );
}
if (clist.isEmpty())
{
// The BBC servers use a self certified cert so don't verify it
ssl.setPeerVerifyMode(QSslSocket::VerifyNone);
}
else
{
ssl.setCaCertificates(clist);
}
// We need to provide a client certificate for the BBC, See:
// openssl s_client -state -prexit -connect securegate.iplayer.bbc.co.uk:443
// for a list of accepted certificates
QString fname = gCoreContext->GetSetting("MhegClientCert", "");
if (!fname.isEmpty())
{
QFile f1(QFile::exists(fname) ? fname : GetShareDir() + fname);
if (f1.open(QIODevice::ReadOnly))
{
QSslCertificate cert(&f1, QSsl::Pem);
if (!cert.isNull())
ssl.setLocalCertificate(cert);
else
LOG(VB_GENERAL, LOG_WARNING, LOC +
QString("'%1' is an invalid certificate").arg(f1.fileName()) );
}
else
{
LOG(VB_GENERAL, LOG_WARNING, LOC +
QString("Opening client certificate '%1': %2")
.arg(f1.fileName()).arg(f1.errorString()) );
}
// Get the private key
fname = gCoreContext->GetSetting("MhegClientKey", "");
if (!fname.isEmpty())
{
QFile f2(QFile::exists(fname) ? fname : GetShareDir() + fname);
if (f2.open(QIODevice::ReadOnly))
{
QSslKey key(&f2, QSsl::Rsa, QSsl::Pem, QSsl::PrivateKey,
gCoreContext->GetSetting("MhegClientKeyPass", "").toLatin1());
if (!key.isNull())
ssl.setPrivateKey(key);
else
LOG(VB_GENERAL, LOG_WARNING, LOC +
QString("'%1' is an invalid key").arg(f2.fileName()) );
}
else
{
LOG(VB_GENERAL, LOG_WARNING, LOC +
QString("Opening private key '%1': %2")
.arg(f2.fileName()).arg(f2.errorString()) );
}
}
}
m_request.setSslConfiguration(ssl);
}
#endif
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Request %2 bytes=%3- from %4")
.arg(m_id).arg(m_request.url().toString())
.arg(m_pos).arg(Source(m_request)) );
m_pending = new NetStreamRequest(m_id, m_request);
NAMThread::PostEvent(m_pending);
return true;
}
// signal from NAMThread manager that a request has been started
void NetStream::slotRequestStarted(int id, QNetworkReply *reply)
{
QMutexLocker locker(&m_mutex);
if (m_id != id)
return;
m_pending = nullptr; // Event is no longer valid
if (!m_reply)
{
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Started 0x%2")
.arg(m_id).arg(quintptr(reply),0,16) );
m_reply = reply;
m_state = kStarted;
reply->setReadBufferSize(kMaxBuffer);
// NB The following signals must be Qt::DirectConnection 'cos this slot
// was connected Qt::DirectConnection so the current thread is NAMThread
// QNetworkReply signals
connect(reply, SIGNAL(finished()), this, SLOT(slotFinished()), Qt::DirectConnection );
#ifndef QT_NO_OPENSSL
connect(reply, SIGNAL(sslErrors(const QList<QSslError> &)), this,
SLOT(slotSslErrors(const QList<QSslError> &)), Qt::DirectConnection );
#endif
// QIODevice signals
connect(reply, SIGNAL(readyRead()), this, SLOT(slotReadyRead()), Qt::DirectConnection );
}
else
LOG(VB_GENERAL, LOG_ERR, LOC +
QString("(%1) Started but m_reply not NULL").arg(m_id));
}
static qlonglong inline ContentLength(const QNetworkReply *reply)
{
bool ok = false;
qlonglong len = reply->header(QNetworkRequest::ContentLengthHeader)
.toLongLong(&ok);
return ok ? len : -1;
}
static qlonglong inline ContentRange(const QNetworkReply *reply,
qulonglong &first, qulonglong &last)
{
QByteArray range = reply->rawHeader("Content-Range");
if (range.isEmpty())
return -1;
// See RFC 2616 14.16: 'bytes begin-end/size'
qulonglong len = 0;
const char *fmt = " bytes %20" SCNd64 " - %20" SCNd64 " / %20" SCNd64;
// cppcheck-suppress wrongPrintfScanfArgNum
if (3 != std::sscanf(range.constData(), fmt, &first, &last, &len))
{
LOG(VB_GENERAL, LOG_ERR, LOC + QString("Invalid Content-Range:'%1'")
.arg(range.constData()) );
return -1;
}
return static_cast<qlonglong>(len);
}
#if 0
static bool inline RequestRange(const QNetworkRequest &request,
qlonglong &first, qlonglong &last)
{
first = last = -1;
QByteArray range = request.rawHeader("Range");
if (range.isEmpty())
return false;
if (1 > std::sscanf(range.constData(), " bytes %20lld - %20lld", &first, &last))
{
LOG(VB_GENERAL, LOG_ERR, LOC + QString("Invalid Range:'%1'")
.arg(range.constData()) );
return false;
}
return true;
}
#endif
// signal from QNetworkReply
void NetStream::slotReadyRead()
{
QMutexLocker locker(&m_mutex);
if (m_reply)
{
qint64 avail = m_reply->bytesAvailable();
LOG(VB_FILE, (avail <= 2 * kMaxBuffer) ? LOG_DEBUG :
(avail <= 4 * kMaxBuffer) ? LOG_INFO : LOG_WARNING,
LOC + QString("(%1) Ready 0x%2, %3 bytes available").arg(m_id)
.arg(quintptr(m_reply),0,16).arg(avail) );
if (m_size < 0 || m_state < kReady)
{
qulonglong first = 0;
qulonglong last = 0;
qlonglong len = ContentRange(m_reply, first, last);
if (len >= 0)
{
m_size = len;
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Ready 0x%2, range %3-%4/%5")
.arg(m_id).arg(quintptr(m_reply),0,16).arg(first).arg(last).arg(len) );
}
else
{
m_size = ContentLength(m_reply);
if (m_state < kReady || m_size >= 0)
{
LOG(VB_FILE, LOG_INFO, LOC +
QString("(%1) Ready 0x%2, content length %3")
.arg(m_id).arg(quintptr(m_reply),0,16).arg(m_size) );
}
}
}
if (m_state < kReady)
m_state = kReady;
locker.unlock();
emit ReadyRead(this);
locker.relock();
m_ready.wakeAll();
}
else
LOG(VB_GENERAL, LOG_ERR, LOC +
QString("(%1) ReadyRead but m_reply = NULL").arg(m_id));
}
// signal from QNetworkReply
void NetStream::slotFinished()
{
QMutexLocker locker(&m_mutex);
if (m_reply)
{
QNetworkReply::NetworkError error = m_reply->error();
if (QNetworkReply::NoError == error)
{
// Check for a re-direct
QUrl url = m_reply->attribute(
QNetworkRequest::RedirectionTargetAttribute).toUrl();
if (!url.isValid())
{
m_state = kFinished;
}
else if (m_nRedirections++ > 0)
{
LOG(VB_FILE, LOG_WARNING, LOC + QString("(%1) Too many redirections")
.arg(m_id));
m_state = kFinished;
}
else if ((url = m_request.url().resolved(url)) == m_request.url())
{
LOG(VB_FILE, LOG_WARNING, LOC + QString("(%1) Redirection loop to %2")
.arg(m_id).arg(url.toString()) );
m_state = kFinished;
}
else
{
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Redirecting").arg(m_id));
m_state = Request(url) ? kPending : kFinished;
}
}
else
{
LOG(VB_FILE, LOG_WARNING, LOC + QString("(%1): %2")
.arg(m_id).arg(m_reply->errorString()) );
m_state = kFinished;
}
if (m_state == kFinished)
{
if (m_size < 0)
m_size = m_pos + m_reply->size();
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Finished 0x%2 %3/%4 bytes from %5")
.arg(m_id).arg(quintptr(m_reply),0,16).arg(m_pos).arg(m_size).arg(Source(m_reply)) );
locker.unlock();
emit Finished(this);
locker.relock();
m_finished.wakeAll();
}
}
else
LOG(VB_GENERAL, LOG_ERR, LOC + QString("(%1) Finished but m_reply = NULL")
.arg(m_id));
}
#ifndef QT_NO_OPENSSL
// signal from QNetworkReply
void NetStream::slotSslErrors(const QList<QSslError> &errors)
{
QMutexLocker locker(&m_mutex);
if (m_reply)
{
bool bIgnore = true;
for (const auto& e : qAsConst(errors))
{
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) SSL error %2: ")
.arg(m_id).arg(e.error()) + e.errorString() );
switch (e.error())
{
#if 1 // The BBC use a self certified cert
case QSslError::SelfSignedCertificateInChain:
break;
#endif
default:
bIgnore = false;
break;
}
}
if (bIgnore)
{
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) SSL errors ignored").arg(m_id));
m_reply->ignoreSslErrors(errors);
}
}
else
LOG(VB_GENERAL, LOG_ERR, LOC +
QString("(%1) SSL error but m_reply = NULL").arg(m_id) );
}
#endif
/**
* RingBuffer interface
*/
// static
bool NetStream::IsSupported(const QUrl &url)
{
return url.isValid() &&
(url.scheme() == "http" || url.scheme() == "https") &&
!url.authority().isEmpty() &&
!url.path().isEmpty();
}
bool NetStream::IsOpen() const
{
QMutexLocker locker(&m_mutex);
return m_state > kClosed;
}
void NetStream::Abort()
{
QMutexLocker locker(&m_mutex);
if (m_pending)
{
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Cancelled").arg(m_id) );
m_pending->m_bCancelled = true;
m_pending = nullptr;
}
if (m_reply)
{
if (m_state >= kStarted && m_state < kFinished)
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Abort 0x%2")
.arg(m_id).arg(quintptr(m_reply),0,16) );
NAMThread::PostEvent(new NetStreamAbort(m_id, m_reply));
// NAMthread will delete the reply
m_reply = nullptr;
}
m_state = kFinished;
}
int NetStream::safe_read(void *data, unsigned sz, unsigned millisecs /* = 0 */)
{
QElapsedTimer t; t.start();
QMutexLocker locker(&m_mutex);
if (m_size >= 0 && m_pos >= m_size)
return 0; // EOF
while (m_state < kFinished && (!m_reply || m_reply->bytesAvailable() < sz))
{
unsigned elapsed = t.elapsed();
if (elapsed >= millisecs)
break;
m_ready.wait(&m_mutex, millisecs - elapsed);
}
locker.unlock();
QMutexLocker lockNAM(NAMThread::GetMutex());
locker.relock();
if (!m_reply)
return -1;
qint64 avail = m_reply->read(reinterpret_cast< char* >(data), sz);
if (avail <= 0)
return m_state >= kFinished ? 0 : -1; // 0= EOF
LOG(VB_FILE, LOG_DEBUG, LOC + QString("(%1) safe_read @ %4 => %2/%3, %5 mS")
.arg(m_id).arg(avail).arg(sz).arg(m_pos).arg(t.elapsed()) );
m_pos += avail;
return (int)avail;
}
qlonglong NetStream::Seek(qlonglong pos)
{
QMutexLocker locker(&m_mutex);
if (pos == m_pos)
return pos;
if (pos < 0 || (m_size >= 0 && pos > m_size))
{
LOG(VB_GENERAL, LOG_ERR, LOC +
QString("(%1) Seek(%2) out of range [0..%3]")
.arg(m_id).arg(pos).arg(m_size) );
return -1;
}
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) Seek(%2) curr %3 end %4")
.arg(m_id).arg(pos).arg(m_pos).arg(m_size) );
m_pos = pos;
return Request(m_request.url()) ? m_pos : -1;
}
qlonglong NetStream::GetReadPosition() const
{
QMutexLocker locker(&m_mutex);
return m_pos;
}
qlonglong NetStream::GetSize() const
{
QMutexLocker locker(&m_mutex);
return m_size;
}
/**
* Synchronous interface
*/
bool NetStream::WaitTillReady(unsigned long milliseconds)
{
QMutexLocker locker(&m_mutex);
QElapsedTimer t; t.start();
while (m_state < kReady)
{
unsigned elapsed = t.elapsed();
if (elapsed > milliseconds)
return false;
m_ready.wait(&m_mutex, milliseconds - elapsed);
}
return true;
}
bool NetStream::WaitTillFinished(unsigned long milliseconds)
{
QMutexLocker locker(&m_mutex);
QElapsedTimer t; t.start();
while (m_state < kFinished)
{
unsigned elapsed = t.elapsed();
if (elapsed > milliseconds)
return false;
m_finished.wait(&m_mutex, milliseconds - elapsed);
}
return true;
}
QNetworkReply::NetworkError NetStream::GetError() const
{
QMutexLocker locker(&m_mutex);
return !m_reply ? QNetworkReply::OperationCanceledError : m_reply->error();
}
QString NetStream::GetErrorString() const
{
QMutexLocker locker(&m_mutex);
return !m_reply ? "Operation cancelled" : m_reply->errorString();
}
qlonglong NetStream::BytesAvailable() const
{
QMutexLocker locker(&m_mutex);
return m_reply ? m_reply->bytesAvailable() : 0;
}
QByteArray NetStream::ReadAll()
{
QMutexLocker locker(&m_mutex);
if (!m_reply)
return nullptr;
QByteArray data = m_reply->readAll();
m_pos += data.size();
return data;
}
/**
* Asynchronous interface
*/
bool NetStream::isStarted() const
{
QMutexLocker locker(&m_mutex);
return m_state >= kStarted;
}
bool NetStream::isReady() const
{
QMutexLocker locker(&m_mutex);
return m_state >= kReady;
}
bool NetStream::isFinished() const
{
QMutexLocker locker(&m_mutex);
return m_state >= kFinished;
}
/**
* Public helpers
*/
// static
bool NetStream::isAvailable()
{
return NAMThread::isAvailable();
}
// Time when URI was last written to cache or invalid if not cached.
// static
QDateTime NetStream::GetLastModified(const QUrl &url)
{
return NAMThread::GetLastModified(url);
}
/**
* NetworkAccessManager event loop thread
*/
//static
NAMThread & NAMThread::manager()
{
QMutexLocker locker(&s_mtx);
// Singleton
static NAMThread s_thread;
s_thread.start();
return s_thread;
}
NAMThread::NAMThread()
{
setObjectName("NAMThread");
#ifndef QT_NO_OPENSSL
// This ought to be done by the Qt lib but isn't in 4.7
//Q_DECLARE_METATYPE(QList<QSslError>)
qRegisterMetaType< QList<QSslError> >();
#endif
}
// virtual
NAMThread::~NAMThread()
{
QMutexLocker locker(&m_mutex);
delete m_nam;
}
// virtual
void NAMThread::run()
{
LOG(VB_FILE, LOG_INFO, LOC "NAMThread starting");
m_nam = new QNetworkAccessManager();
m_nam->setObjectName("NetStream NAM");
// Setup cache
QScopedPointer<QNetworkDiskCache> cache(new QNetworkDiskCache());
cache->setCacheDirectory(GetConfDir() + "/cache/netstream-" +
gCoreContext->GetHostName());
m_nam->setCache(cache.take());
// Setup a network proxy e.g. for TOR: socks://localhost:9050
// TODO get this from mythdb
QString proxy(getenv("MYTHMHEG_PROXY"));
if (!proxy.isEmpty())
{
QUrl url(proxy, QUrl::TolerantMode);
QNetworkProxy::ProxyType type =
url.scheme().isEmpty() ? QNetworkProxy::HttpProxy :
url.scheme() == "socks" ? QNetworkProxy::Socks5Proxy :
url.scheme() == "http" ? QNetworkProxy::HttpProxy :
url.scheme() == "https" ? QNetworkProxy::HttpProxy :
url.scheme() == "cache" ? QNetworkProxy::HttpCachingProxy :
url.scheme() == "ftp" ? QNetworkProxy::FtpCachingProxy :
QNetworkProxy::NoProxy;
if (QNetworkProxy::NoProxy != type)
{
LOG(VB_GENERAL, LOG_INFO, LOC "Using proxy: " + proxy);
m_nam->setProxy(QNetworkProxy(
type, url.host(), url.port(), url.userName(), url.password() ));
}
else
{
LOG(VB_MHEG, LOG_ERR, LOC + QString("Unknown proxy type %1")
.arg(url.scheme()) );
}
}
// Quit when main app quits
connect(QCoreApplication::instance(), SIGNAL(aboutToQuit()), this, SLOT(quit()) );
m_running.release();
QMutexLocker lockNAM(&m_mutexNAM);
while(!m_bQuit)
{
// Process NAM events
QCoreApplication::processEvents();
lockNAM.unlock();
QMutexLocker locker(&m_mutex);
m_work.wait(&m_mutex, 100);
lockNAM.relock();
while (!m_workQ.isEmpty())
{
QScopedPointer< QEvent > ev(m_workQ.dequeue());
locker.unlock();
NewRequest(ev.data());
locker.relock();
}
}
m_running.acquire();
delete m_nam;
m_nam = nullptr;
LOG(VB_FILE, LOG_INFO, LOC "NAMThread stopped");
}
// slot
void NAMThread::quit()
{
m_bQuit = true;
QThread::quit();
}
void NAMThread::Post(QEvent *event)
{
QMutexLocker locker(&m_mutex);
m_workQ.enqueue(event);
}
bool NAMThread::NewRequest(QEvent *event)
{
switch (event->type())
{
case NetStreamRequest::kType:
return StartRequest(dynamic_cast< NetStreamRequest* >(event));
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch"
case NetStreamAbort::kType:
return AbortRequest(dynamic_cast< NetStreamAbort* >(event));
#pragma GCC diagnostic pop
default:
break;
}
return false;
}
bool NAMThread::StartRequest(NetStreamRequest *p)
{
if (!p)
{
LOG(VB_GENERAL, LOG_ERR, LOC "Invalid NetStreamRequest");
return false;
}
if (!p->m_bCancelled)
{
QNetworkReply *reply = m_nam->get(p->m_req);
LOG(VB_FILE, LOG_DEBUG, LOC + QString("(%1) StartRequest 0x%2")
.arg(p->m_id).arg(quintptr(reply),0,16) );
emit requestStarted(p->m_id, reply);
}
else
LOG(VB_FILE, LOG_INFO, LOC + QString("(%1) NetStreamRequest cancelled").arg(p->m_id) );
return true;
}
bool NAMThread::AbortRequest(NetStreamAbort *p)
{
if (!p)
{
LOG(VB_GENERAL, LOG_ERR, LOC "Invalid NetStreamAbort");
return false;
}
LOG(VB_FILE, LOG_DEBUG, LOC + QString("(%1) AbortRequest 0x%2").arg(p->m_id)
.arg(quintptr(p->m_reply),0,16) );
p->m_reply->abort();
p->m_reply->disconnect();
delete p->m_reply;
return true;
}
// static
bool NAMThread::isAvailable()
{
NAMThread &m = manager();
if (!m.m_running.tryAcquire(1, 3000))
return false;
m.m_running.release();
QMutexLocker locker(&m.m_mutex);
if (!m.m_nam)
return false;
switch (m.m_nam->networkAccessible())
{
case QNetworkAccessManager::Accessible: return true;
case QNetworkAccessManager::NotAccessible: return false;
case QNetworkAccessManager::UnknownAccessibility: return true;
}
return false;
}
// Time when URI was last written to cache or invalid if not cached.
// static
QDateTime NAMThread::GetLastModified(const QUrl &url)
{
NAMThread &m = manager();
QMutexLocker locker(&m.m_mutex);
if (!m.m_nam)
return QDateTime(); // Invalid
QAbstractNetworkCache *cache = m.m_nam->cache();
if (!cache)
return QDateTime(); // Invalid
QNetworkCacheMetaData meta = cache->metaData(url);
if (!meta.isValid())
{
LOG(VB_FILE, LOG_DEBUG, LOC + QString("GetLastModified('%1') not in cache")
.arg(url.toString()));
return QDateTime(); // Invalid
}
// Check if expired
QDateTime const now(QDateTime::currentDateTime()); // local time
QDateTime expire = meta.expirationDate();
if (expire.isValid() && expire.toLocalTime() < now)
{
LOG(VB_FILE, LOG_INFO, LOC + QString("GetLastModified('%1') past expiration %2")
.arg(url.toString()).arg(expire.toString()));
return QDateTime(); // Invalid
}
// Get time URI was modified (Last-Modified header) NB this may be invalid
QDateTime lastMod = meta.lastModified();
QNetworkCacheMetaData::RawHeaderList headers = meta.rawHeaders();
for (const auto& h : qAsConst(headers))
{
// RFC 1123 date format: Thu, 01 Dec 1994 16:00:00 GMT
static const QString kSzFormat { "ddd, dd MMM yyyy HH:mm:ss 'GMT'" };
QString const first(h.first.toLower());
if (first == "cache-control")
{
QString const second(h.second.toLower());
if (second == "no-cache" || second == "no-store")
{
LOG(VB_FILE, LOG_INFO, LOC +
QString("GetLastModified('%1') Cache-Control disabled")
.arg(url.toString()) );
cache->remove(url);
return QDateTime(); // Invalid
}
}
else if (first == "date")
{
QDateTime d = QDateTime::fromString(h.second, kSzFormat);
if (!d.isValid())
{
LOG(VB_GENERAL, LOG_WARNING, LOC +
QString("GetLastModified invalid Date header '%1'")
.arg(h.second.constData()));
continue;
}
d.setTimeSpec(Qt::UTC);
lastMod = d;
}
}
LOG(VB_FILE, LOG_DEBUG, LOC + QString("GetLastModified('%1') last modified %2")