diff options
Diffstat (limited to 'src/network/access/qhttpnetworkconnectionchannel.cpp')
| -rw-r--r-- | src/network/access/qhttpnetworkconnectionchannel.cpp | 112 |
1 files changed, 70 insertions, 42 deletions
diff --git a/src/network/access/qhttpnetworkconnectionchannel.cpp b/src/network/access/qhttpnetworkconnectionchannel.cpp index 98247b7df0..8980ed7a41 100644 --- a/src/network/access/qhttpnetworkconnectionchannel.cpp +++ b/src/network/access/qhttpnetworkconnectionchannel.cpp @@ -58,6 +58,11 @@ QT_BEGIN_NAMESPACE // TODO: Put channel specific stuff here so it does not polute qhttpnetworkconnection.cpp +// Because in-flight when sending a request, the server might close our connection (because the persistent HTTP +// connection times out) +// We use 3 because we can get a _q_error 3 times depending on the timing: +static const int reconnectAttemptsDefault = 3; + QHttpNetworkConnectionChannel::QHttpNetworkConnectionChannel() : socket(0) , ssl(false) @@ -69,7 +74,7 @@ QHttpNetworkConnectionChannel::QHttpNetworkConnectionChannel() , resendCurrent(false) , lastStatus(0) , pendingEncrypt(false) - , reconnectAttempts(2) + , reconnectAttempts(reconnectAttemptsDefault) , authMethod(QAuthenticatorPrivate::None) , proxyAuthMethod(QAuthenticatorPrivate::None) , authenticationCredentialsSent(false) @@ -106,19 +111,18 @@ void QHttpNetworkConnectionChannel::init() socket->setProxy(QNetworkProxy::NoProxy); #endif - // We want all signals (except the interactive ones) be connected as QueuedConnection - // because else we're falling into cases where we recurse back into the socket code - // and mess up the state. Always going to the event loop (and expecting that when reading/writing) - // is safer. + // After some back and forth in all the last years, this is now a DirectConnection because otherwise + // the state inside the *Socket classes gets messed up, also in conjunction with the socket notifiers + // which behave slightly differently on Windows vs Linux QObject::connect(socket, SIGNAL(bytesWritten(qint64)), this, SLOT(_q_bytesWritten(qint64)), - Qt::QueuedConnection); + Qt::DirectConnection); QObject::connect(socket, SIGNAL(connected()), this, SLOT(_q_connected()), - Qt::QueuedConnection); + Qt::DirectConnection); QObject::connect(socket, SIGNAL(readyRead()), this, SLOT(_q_readyRead()), - Qt::QueuedConnection); + Qt::DirectConnection); // The disconnected() and error() signals may already come // while calling connectToHost(). @@ -129,10 +133,10 @@ void QHttpNetworkConnectionChannel::init() qRegisterMetaType<QAbstractSocket::SocketError>(); QObject::connect(socket, SIGNAL(disconnected()), this, SLOT(_q_disconnected()), - Qt::QueuedConnection); + Qt::DirectConnection); QObject::connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(_q_error(QAbstractSocket::SocketError)), - Qt::QueuedConnection); + Qt::DirectConnection); #ifndef QT_NO_NETWORKPROXY @@ -147,7 +151,7 @@ void QHttpNetworkConnectionChannel::init() // won't be a sslSocket if encrypt is false QObject::connect(sslSocket, SIGNAL(encrypted()), this, SLOT(_q_encrypted()), - Qt::QueuedConnection); + Qt::DirectConnection); QObject::connect(sslSocket, SIGNAL(sslErrors(QList<QSslError>)), this, SLOT(_q_sslErrors(QList<QSslError>)), Qt::DirectConnection); @@ -156,7 +160,7 @@ void QHttpNetworkConnectionChannel::init() Qt::DirectConnection); QObject::connect(sslSocket, SIGNAL(encryptedBytesWritten(qint64)), this, SLOT(_q_encryptedBytesWritten(qint64)), - Qt::QueuedConnection); + Qt::DirectConnection); if (ignoreAllSslErrors) sslSocket->ignoreSslErrors(); @@ -400,7 +404,7 @@ void QHttpNetworkConnectionChannel::allDone() // reset the reconnection attempts after we receive a complete reply. // in case of failures, each channel will attempt two reconnects before emitting error. - reconnectAttempts = 2; + reconnectAttempts = reconnectAttemptsDefault; // now the channel can be seen as free/idle again, all signal emissions for the reply have been done if (state != QHttpNetworkConnectionChannel::ClosingState) @@ -668,6 +672,15 @@ void QHttpNetworkConnectionChannel::closeAndResendCurrentRequest() QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection); } +void QHttpNetworkConnectionChannel::resendCurrentRequest() +{ + requeueCurrentlyPipelinedRequests(); + if (reply) + resendCurrent = true; + if (qobject_cast<QHttpNetworkConnection*>(connection)) + QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection); +} + bool QHttpNetworkConnectionChannel::isSocketBusy() const { return (state & QHttpNetworkConnectionChannel::BusyState); @@ -711,8 +724,8 @@ void QHttpNetworkConnectionChannel::_q_disconnected() return; } - // read the available data before closing - if (isSocketWaiting() || isSocketReading()) { + // read the available data before closing (also done in _q_error for other codepaths) + if ((isSocketWaiting() || isSocketReading()) && socket->bytesAvailable()) { if (reply) { state = QHttpNetworkConnectionChannel::ReadingState; _q_receiveReply(); @@ -724,7 +737,8 @@ void QHttpNetworkConnectionChannel::_q_disconnected() state = QHttpNetworkConnectionChannel::IdleState; requeueCurrentlyPipelinedRequests(); - close(); + + pendingEncrypt = false; } @@ -806,11 +820,19 @@ void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socket errorCode = QNetworkReply::ConnectionRefusedError; break; case QAbstractSocket::RemoteHostClosedError: - // try to reconnect/resend before sending an error. - // while "Reading" the _q_disconnected() will handle this. - if (state != QHttpNetworkConnectionChannel::IdleState && state != QHttpNetworkConnectionChannel::ReadingState) { + // This error for SSL comes twice in a row, first from SSL layer ("The TLS/SSL connection has been closed") then from TCP layer. + // Depending on timing it can also come three times in a row (first time when we try to write into a closing QSslSocket). + // The reconnectAttempts handling catches the cases where we can re-send the request. + if (!reply && state == QHttpNetworkConnectionChannel::IdleState) { + // Not actually an error, it is normal for Keep-Alive connections to close after some time if no request + // is sent on them. No need to error the other replies below. Just bail out here. + // The _q_disconnected will handle the possibly pipelined replies + return; + } else if (state != QHttpNetworkConnectionChannel::IdleState && state != QHttpNetworkConnectionChannel::ReadingState) { + // Try to reconnect/resend before sending an error. + // While "Reading" the _q_disconnected() will handle this. if (reconnectAttempts-- > 0) { - closeAndResendCurrentRequest(); + resendCurrentRequest(); return; } else { errorCode = QNetworkReply::RemoteHostClosedError; @@ -821,11 +843,15 @@ void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socket if (!reply->d_func()->expectContent()) { // No content expected, this is a valid way to have the connection closed by the server + // We need to invoke this asynchronously to make sure the state() of the socket is on QAbstractSocket::UnconnectedState + QMetaObject::invokeMethod(this, "_q_receiveReply", Qt::QueuedConnection); return; } if (reply->contentLength() == -1 && !reply->d_func()->isChunked()) { // There was no content-length header and it's not chunked encoding, // so this is a valid way to have the connection closed by the server + // We need to invoke this asynchronously to make sure the state() of the socket is on QAbstractSocket::UnconnectedState + QMetaObject::invokeMethod(this, "_q_receiveReply", Qt::QueuedConnection); return; } // ok, we got a disconnect even though we did not expect it @@ -835,24 +861,15 @@ void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socket // we can ignore the readbuffersize as the data is already // in memory and we will not receive more data on the socket. reply->setReadBufferSize(0); + reply->setDownstreamLimited(false); _q_receiveReply(); -#ifndef QT_NO_SSL - if (ssl) { - // QT_NO_OPENSSL. The QSslSocket can still have encrypted bytes in the plainsocket. - // So we need to check this if the socket is a QSslSocket. When the socket is flushed - // it will force a decrypt of the encrypted data in the plainsocket. - QSslSocket *sslSocket = static_cast<QSslSocket*>(socket); - qint64 beforeFlush = sslSocket->encryptedBytesAvailable(); - while (sslSocket->encryptedBytesAvailable()) { - sslSocket->flush(); - _q_receiveReply(); - qint64 afterFlush = sslSocket->encryptedBytesAvailable(); - if (afterFlush == beforeFlush) - break; - beforeFlush = afterFlush; - } + if (!reply) { + // No more reply assigned after the previous call? Then it had been finished successfully. + requeueCurrentlyPipelinedRequests(); + state = QHttpNetworkConnectionChannel::IdleState; + QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection); + return; } -#endif } errorCode = QNetworkReply::RemoteHostClosedError; @@ -863,7 +880,7 @@ void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socket case QAbstractSocket::SocketTimeoutError: // try to reconnect/resend before sending an error. if (state == QHttpNetworkConnectionChannel::WritingState && (reconnectAttempts-- > 0)) { - closeAndResendCurrentRequest(); + resendCurrentRequest(); return; } errorCode = QNetworkReply::TimeoutError; @@ -877,7 +894,7 @@ void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socket case QAbstractSocket::ProxyConnectionClosedError: // try to reconnect/resend before sending an error. if (reconnectAttempts-- > 0) { - closeAndResendCurrentRequest(); + resendCurrentRequest(); return; } errorCode = QNetworkReply::ProxyConnectionClosedError; @@ -885,7 +902,7 @@ void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socket case QAbstractSocket::ProxyConnectionTimeoutError: // try to reconnect/resend before sending an error. if (reconnectAttempts-- > 0) { - closeAndResendCurrentRequest(); + resendCurrentRequest(); return; } errorCode = QNetworkReply::ProxyTimeoutError; @@ -933,8 +950,18 @@ void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socket // send the next request QMetaObject::invokeMethod(that, "_q_startNextRequest", Qt::QueuedConnection); - if (that) //signal emission triggered event loop - close(); + if (that) { + //signal emission triggered event loop + if (!socket) + state = QHttpNetworkConnectionChannel::IdleState; + else if (socket->state() == QAbstractSocket::UnconnectedState) + state = QHttpNetworkConnectionChannel::IdleState; + else + state = QHttpNetworkConnectionChannel::ClosingState; + + // pendingEncrypt must only be true in between connected and encrypted states + pendingEncrypt = false; + } } #ifndef QT_NO_NETWORKPROXY @@ -958,7 +985,8 @@ void QHttpNetworkConnectionChannel::_q_proxyAuthenticationRequired(const QNetwor void QHttpNetworkConnectionChannel::_q_uploadDataReadyRead() { - sendRequest(); + if (reply) + sendRequest(); } #ifndef QT_NO_SSL |