src/network/access/qhttpnetworkconnectionchannel.cpp

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  41
  42 #include "qhttpnetworkconnection_p.h"
  43 #include "qhttpnetworkconnectionchannel_p.h"
  44 #include "private/qnoncontiguousbytedevice_p.h"
  45
  46 #include <qpair.h>
  47 #include <qdebug.h>
  48
  49 #ifndef QT_NO_HTTP
  50
  51 #ifndef QT_NO_SSL
  52 #    include <QtNetwork/qsslkey.h>
  53 #    include <QtNetwork/qsslcipher.h>
  54 #    include <QtNetwork/qsslconfiguration.h>
  55 #endif
  56
  57 #ifndef QT_NO_BEARERMANAGEMENT
  58 #include "private/qnetworksession_p.h"
  59 #endif
  60
  61 QT_BEGIN_NAMESPACE
  62
  63 // TODO: Put channel specific stuff here so it does not polute qhttpnetworkconnection.cpp
  64
  65 QHttpNetworkConnectionChannel::QHttpNetworkConnectionChannel()
  66     : socket(0)
  67     , ssl(false)
  68     , state(IdleState)
  69     , reply(0)
  70     , written(0)
  71     , bytesTotal(0)
  72     , resendCurrent(false)
  73     , lastStatus(0)
  74     , pendingEncrypt(false)
  75     , reconnectAttempts(2)
  76     , authMethod(QAuthenticatorPrivate::None)
  77     , proxyAuthMethod(QAuthenticatorPrivate::None)
  78     , authenticationCredentialsSent(false)
  79     , proxyCredentialsSent(false)
  80 #ifndef QT_NO_SSL
  81     , ignoreAllSslErrors(false)
  82 #endif
  83     , pipeliningSupported(PipeliningSupportUnknown)
  84     , networkLayerPreference(QAbstractSocket::AnyIPProtocol)
  85     , connection(0)
  86 {
  87     // Inlining this function in the header leads to compiler error on
  88     // release-armv5, on at least timebox 9.2 and 10.1.
  89 }
  90
  91 void QHttpNetworkConnectionChannel::init()
  92 {
  93 #ifndef QT_NO_SSL
  94     if (connection->d_func()->encrypt)
  95         socket = new QSslSocket;
  96     else
  97         socket = new QTcpSocket;
  98 #else
  99     socket = new QTcpSocket;
 100 #endif
 101 #ifndef QT_NO_BEARERMANAGEMENT
 102     //push session down to socket
 103     if (networkSession)
 104         socket->setProperty("_q_networksession", QVariant::fromValue(networkSession));
 105 #endif
 106 #ifndef QT_NO_NETWORKPROXY
 107     // Set by QNAM anyway, but let's be safe here
 108     socket->setProxy(QNetworkProxy::NoProxy);
 109 #endif
 110
 111     QObject::connect(socket, SIGNAL(bytesWritten(qint64)),
 112                      this, SLOT(_q_bytesWritten(qint64)),
 113                      Qt::DirectConnection);
 114     QObject::connect(socket, SIGNAL(connected()),
 115                      this, SLOT(_q_connected()),
 116                      Qt::DirectConnection);
 117     QObject::connect(socket, SIGNAL(readyRead()),
 118                      this, SLOT(_q_readyRead()),
 119                      Qt::DirectConnection);
 120
 121     // The disconnected() and error() signals may already come
 122     // while calling connectToHost().
 123     // In case of a cached hostname or an IP this
 124     // will then emit a signal to the user of QNetworkReply
 125     // but cannot be caught because the user did not have a chance yet
 126     // to connect to QNetworkReply's signals.
 127     qRegisterMetaType<QAbstractSocket::SocketError>("QAbstractSocket::SocketError");
 128     QObject::connect(socket, SIGNAL(disconnected()),
 129                      this, SLOT(_q_disconnected()),
 130                      Qt::QueuedConnection);
 131     QObject::connect(socket, SIGNAL(error(QAbstractSocket::SocketError)),
 132                      this, SLOT(_q_error(QAbstractSocket::SocketError)),
 133                      Qt::QueuedConnection);
 134
 135
 136 #ifndef QT_NO_NETWORKPROXY
 137     QObject::connect(socket, SIGNAL(proxyAuthenticationRequired(QNetworkProxy,QAuthenticator*)),
 138                      this, SLOT(_q_proxyAuthenticationRequired(QNetworkProxy,QAuthenticator*)),
 139                      Qt::DirectConnection);
 140 #endif
 141
 142 #ifndef QT_NO_SSL
 143     QSslSocket *sslSocket = qobject_cast<QSslSocket*>(socket);
 144     if (sslSocket) {
 145         // won't be a sslSocket if encrypt is false
 146         QObject::connect(sslSocket, SIGNAL(encrypted()),
 147                          this, SLOT(_q_encrypted()),
 148                          Qt::DirectConnection);
 149         QObject::connect(sslSocket, SIGNAL(sslErrors(QList<QSslError>)),
 150                          this, SLOT(_q_sslErrors(QList<QSslError>)),
 151                          Qt::DirectConnection);
 152         QObject::connect(sslSocket, SIGNAL(encryptedBytesWritten(qint64)),
 153                          this, SLOT(_q_encryptedBytesWritten(qint64)),
 154                          Qt::DirectConnection);
 155     }
 156 #endif
 157 }
 158
 159
 160 void QHttpNetworkConnectionChannel::close()
 161 {
 162     if (socket->state() == QAbstractSocket::UnconnectedState)
 163         state = QHttpNetworkConnectionChannel::IdleState;
 164     else
 165         state = QHttpNetworkConnectionChannel::ClosingState;
 166
 167     socket->close();
 168 }
 169
 170
 171 bool QHttpNetworkConnectionChannel::sendRequest()
 172 {
 173     if (!reply) {
 174         // heh, how should that happen!
 175         qWarning() << "QHttpNetworkConnectionChannel::sendRequest() called without QHttpNetworkReply";
 176         state = QHttpNetworkConnectionChannel::IdleState;
 177         return false;
 178     }
 179
 180     switch (state) {
 181     case QHttpNetworkConnectionChannel::IdleState: { // write the header
 182         if (!ensureConnection()) {
 183             // wait for the connection (and encryption) to be done
 184             // sendRequest will be called again from either
 185             // _q_connected or _q_encrypted
 186             return false;
 187         }
 188         written = 0; // excluding the header
 189         bytesTotal = 0;
 190
 191         QHttpNetworkReplyPrivate *replyPrivate = reply->d_func();
 192         replyPrivate->clear();
 193         replyPrivate->connection = connection;
 194         replyPrivate->connectionChannel = this;
 195         replyPrivate->autoDecompress = request.d->autoDecompress;
 196         replyPrivate->pipeliningUsed = false;
 197
 198         // if the url contains authentication parameters, use the new ones
 199         // both channels will use the new authentication parameters
 200         if (!request.url().userInfo().isEmpty() && request.withCredentials()) {
 201             QUrl url = request.url();
 202             QAuthenticator &auth = authenticator;
 203             if (url.userName() != auth.user()
 204                 || (!url.password().isEmpty() && url.password() != auth.password())) {
 205                 auth.setUser(url.userName());
 206                 auth.setPassword(url.password());
 207                 connection->d_func()->copyCredentials(connection->d_func()->indexOf(socket), &auth, false);
 208             }
 209             // clear the userinfo,  since we use the same request for resending
 210             // userinfo in url can conflict with the one in the authenticator
 211             url.setUserInfo(QString());
 212             request.setUrl(url);
 213         }
 214         // Will only be false if QtWebKit is performing a cross-origin XMLHttpRequest
 215         // and withCredentials has not been set to true.
 216         if (request.withCredentials())
 217             connection->d_func()->createAuthorization(socket, request);
 218 #ifndef QT_NO_NETWORKPROXY
 219         QByteArray header = QHttpNetworkRequestPrivate::header(request,
 220             (connection->d_func()->networkProxy.type() != QNetworkProxy::NoProxy));
 221 #else
 222         QByteArray header = QHttpNetworkRequestPrivate::header(request, false);
 223 #endif
 224         socket->write(header);
 225         // flushing is dangerous (QSslSocket calls transmit which might read or error)
 226 //        socket->flush();
 227         QNonContiguousByteDevice* uploadByteDevice = request.uploadByteDevice();
 228         if (uploadByteDevice) {
 229             // connect the signals so this function gets called again
 230             QObject::connect(uploadByteDevice, SIGNAL(readyRead()),this, SLOT(_q_uploadDataReadyRead()));
 231
 232             bytesTotal = request.contentLength();
 233
 234             state = QHttpNetworkConnectionChannel::WritingState; // start writing data
 235             sendRequest(); //recurse
 236         } else {
 237             state = QHttpNetworkConnectionChannel::WaitingState; // now wait for response
 238             sendRequest(); //recurse
 239         }
 240
 241         break;
 242     }
 243     case QHttpNetworkConnectionChannel::WritingState:
 244     {
 245         // write the data
 246         QNonContiguousByteDevice* uploadByteDevice = request.uploadByteDevice();
 247         if (!uploadByteDevice || bytesTotal == written) {
 248             if (uploadByteDevice)
 249                 emit reply->dataSendProgress(written, bytesTotal);
 250             state = QHttpNetworkConnectionChannel::WaitingState; // now wait for response
 251             sendRequest(); // recurse
 252             break;
 253         }
 254
 255         // only feed the QTcpSocket buffer when there is less than 32 kB in it
 256         const qint64 socketBufferFill = 32*1024;
 257         const qint64 socketWriteMaxSize = 16*1024;
 258
 259
 260 #ifndef QT_NO_SSL
 261         QSslSocket *sslSocket = qobject_cast<QSslSocket*>(socket);
 262         // if it is really an ssl socket, check more than just bytesToWrite()
 263         while ((socket->bytesToWrite() + (sslSocket ? sslSocket->encryptedBytesToWrite() : 0))
 264                 <= socketBufferFill && bytesTotal != written)
 265 #else
 266         while (socket->bytesToWrite() <= socketBufferFill
 267                && bytesTotal != written)
 268 #endif
 269         {
 270             // get pointer to upload data
 271             qint64 currentReadSize = 0;
 272             qint64 desiredReadSize = qMin(socketWriteMaxSize, bytesTotal - written);
 273             const char *readPointer = uploadByteDevice->readPointer(desiredReadSize, currentReadSize);
 274
 275             if (currentReadSize == -1) {
 276                 // premature eof happened
 277                 connection->d_func()->emitReplyError(socket, reply, QNetworkReply::UnknownNetworkError);
 278                 return false;
 279                 break;
 280             } else if (readPointer == 0 || currentReadSize == 0) {
 281                 // nothing to read currently, break the loop
 282                 break;
 283             } else {
 284                 qint64 currentWriteSize = socket->write(readPointer, currentReadSize);
 285                 if (currentWriteSize == -1 || currentWriteSize != currentReadSize) {
 286                     // socket broke down
 287                     connection->d_func()->emitReplyError(socket, reply, QNetworkReply::UnknownNetworkError);
 288                     return false;
 289                 } else {
 290                     written += currentWriteSize;
 291                     uploadByteDevice->advanceReadPointer(currentWriteSize);
 292
 293                     emit reply->dataSendProgress(written, bytesTotal);
 294
 295                     if (written == bytesTotal) {
 296                         // make sure this function is called once again
 297                         state = QHttpNetworkConnectionChannel::WaitingState;
 298                         sendRequest();
 299                         break;
 300                     }
 301                 }
 302             }
 303         }
 304         break;
 305     }
 306
 307     case QHttpNetworkConnectionChannel::WaitingState:
 308     {
 309         QNonContiguousByteDevice* uploadByteDevice = request.uploadByteDevice();
 310         if (uploadByteDevice) {
 311             QObject::disconnect(uploadByteDevice, SIGNAL(readyRead()), this, SLOT(_q_uploadDataReadyRead()));
 312         }
 313
 314         // HTTP pipelining
 315         //connection->d_func()->fillPipeline(socket);
 316         //socket->flush();
 317
 318         // ensure we try to receive a reply in all cases, even if _q_readyRead_ hat not been called
 319         // this is needed if the sends an reply before we have finished sending the request. In that
 320         // case receiveReply had been called before but ignored the server reply
 321         if (socket->bytesAvailable())
 322             QMetaObject::invokeMethod(this, "_q_receiveReply", Qt::QueuedConnection);
 323         break;
 324     }
 325     case QHttpNetworkConnectionChannel::ReadingState:
 326         // ignore _q_bytesWritten in these states
 327         // fall through
 328     default:
 329         break;
 330     }
 331     return true;
 332 }
 333
 334
 335 void QHttpNetworkConnectionChannel::_q_receiveReply()
 336 {
 337     Q_ASSERT(socket);
 338
 339     if (!reply) {
 340         // heh, how should that happen!
 341         qWarning() << "QHttpNetworkConnectionChannel::_q_receiveReply() called without QHttpNetworkReply,"
 342                 << socket->bytesAvailable() << "bytes on socket.";
 343         close();
 344         return;
 345     }
 346
 347     // only run when the QHttpNetworkConnection is not currently being destructed, e.g.
 348     // this function is called from _q_disconnected which is called because
 349     // of ~QHttpNetworkConnectionPrivate
 350     if (!qobject_cast<QHttpNetworkConnection*>(connection)) {
 351         return;
 352     }
 353
 354     QAbstractSocket::SocketState socketState = socket->state();
 355
 356     // connection might be closed to signal the end of data
 357     if (socketState == QAbstractSocket::UnconnectedState) {
 358         if (socket->bytesAvailable() <= 0) {
 359             if (reply->d_func()->state == QHttpNetworkReplyPrivate::ReadingDataState) {
 360                 // finish this reply. this case happens when the server did not send a content length
 361                 reply->d_func()->state = QHttpNetworkReplyPrivate::AllDoneState;
 362                 allDone();
 363                 return;
 364             } else {
 365                 handleUnexpectedEOF();
 366                 return;
 367             }
 368         } else {
 369             // socket not connected but still bytes for reading.. just continue in this function
 370         }
 371     }
 372
 373     // read loop for the response
 374     qint64 bytes = 0;
 375     qint64 lastBytes = bytes;
 376     do {
 377         lastBytes = bytes;
 378
 379         QHttpNetworkReplyPrivate::ReplyState state = reply->d_func()->state;
 380         switch (state) {
 381         case QHttpNetworkReplyPrivate::NothingDoneState: {
 382             state = reply->d_func()->state = QHttpNetworkReplyPrivate::ReadingStatusState;
 383             // fallthrough
 384         }
 385         case QHttpNetworkReplyPrivate::ReadingStatusState: {
 386             qint64 statusBytes = reply->d_func()->readStatus(socket);
 387             if (statusBytes == -1) {
 388                 // connection broke while reading status. also handled if later _q_disconnected is called
 389                 handleUnexpectedEOF();
 390                 return;
 391             }
 392             bytes += statusBytes;
 393             lastStatus = reply->d_func()->statusCode;
 394             break;
 395         }
 396         case QHttpNetworkReplyPrivate::ReadingHeaderState: {
 397             QHttpNetworkReplyPrivate *replyPrivate = reply->d_func();
 398             qint64 headerBytes = replyPrivate->readHeader(socket);
 399             if (headerBytes == -1) {
 400                 // connection broke while reading headers. also handled if later _q_disconnected is called
 401                 handleUnexpectedEOF();
 402                 return;
 403             }
 404             bytes += headerBytes;
 405             // If headers were parsed successfully now it is the ReadingDataState
 406             if (replyPrivate->state == QHttpNetworkReplyPrivate::ReadingDataState) {
 407                 if (replyPrivate->isCompressed() && replyPrivate->autoDecompress) {
 408                     // remove the Content-Length from header
 409                     replyPrivate->removeAutoDecompressHeader();
 410                 } else {
 411                     replyPrivate->autoDecompress = false;
 412                 }
 413                 if (replyPrivate->statusCode == 100) {
 414                     replyPrivate->clearHttpLayerInformation();
 415                     replyPrivate->state = QHttpNetworkReplyPrivate::ReadingStatusState;
 416                     break; // ignore
 417                 }
 418                 if (replyPrivate->shouldEmitSignals())
 419                     emit reply->headerChanged();
 420                 // After headerChanged had been emitted
 421                 // we can suddenly have a replyPrivate->userProvidedDownloadBuffer
 422                 // this is handled in the ReadingDataState however
 423
 424                 if (!replyPrivate->expectContent()) {
 425                     replyPrivate->state = QHttpNetworkReplyPrivate::AllDoneState;
 426                     allDone();
 427                     break;
 428                 }
 429             }
 430             break;
 431         }
 432         case QHttpNetworkReplyPrivate::ReadingDataState: {
 433            QHttpNetworkReplyPrivate *replyPrivate = reply->d_func();
 434            if (socket->state() == QAbstractSocket::ConnectedState &&
 435                replyPrivate->downstreamLimited && !replyPrivate->responseData.isEmpty() && replyPrivate->shouldEmitSignals()) {
 436                // (only do the following when still connected, not when we have already been disconnected and there is still data)
 437                // We already have some HTTP body data. We don't read more from the socket until
 438                // this is fetched by QHttpNetworkAccessHttpBackend. If we would read more,
 439                // we could not limit our read buffer usage.
 440                // We only do this when shouldEmitSignals==true because our HTTP parsing
 441                // always needs to parse the 401/407 replies. Therefore they don't really obey
 442                // to the read buffer maximum size, but we don't care since they should be small.
 443                return;
 444            }
 445
 446            if (replyPrivate->userProvidedDownloadBuffer) {
 447                // the user provided a direct buffer where we should put all our data in.
 448                // this only works when we can tell the user the content length and he/she can allocate
 449                // the buffer in that size.
 450                // note that this call will read only from the still buffered data
 451                qint64 haveRead = replyPrivate->readBodyVeryFast(socket, replyPrivate->userProvidedDownloadBuffer + replyPrivate->totalProgress);
 452                if (haveRead > 0) {
 453                    bytes += haveRead;
 454                    replyPrivate->totalProgress += haveRead;
 455                    // the user will get notified of it via progress signal
 456                    emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
 457                } else if (haveRead == 0) {
 458                    // Happens since this called in a loop. Currently no bytes available.
 459                } else if (haveRead < 0) {
 460                    connection->d_func()->emitReplyError(socket, reply, QNetworkReply::RemoteHostClosedError);
 461                    break;
 462                }
 463            } else if (!replyPrivate->isChunked() && !replyPrivate->autoDecompress
 464                  && replyPrivate->bodyLength > 0) {
 465                  // bulk files like images should fulfill these properties and
 466                  // we can therefore save on memory copying
 467                 qint64 haveRead = replyPrivate->readBodyFast(socket, &replyPrivate->responseData);
 468                 bytes += haveRead;
 469                 replyPrivate->totalProgress += haveRead;
 470                 if (replyPrivate->shouldEmitSignals()) {
 471                     emit reply->readyRead();
 472                     emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
 473                 }
 474             }
 475             else
 476             {
 477                 // use the traditional slower reading (for compressed encoding, chunked encoding,
 478                 // no content-length etc)
 479                 qint64 haveRead = replyPrivate->readBody(socket, &replyPrivate->responseData);
 480                 if (haveRead > 0) {
 481                     bytes += haveRead;
 482                     replyPrivate->totalProgress += haveRead;
 483                     if (replyPrivate->shouldEmitSignals()) {
 484                         emit reply->readyRead();
 485                         emit reply->dataReadProgress(replyPrivate->totalProgress, replyPrivate->bodyLength);
 486                     }
 487                 } else if (haveRead == -1) {
 488                     // Some error occured
 489                     connection->d_func()->emitReplyError(socket, reply, QNetworkReply::ProtocolFailure);
 490                     break;
 491                 }
 492             }
 493             // still in ReadingDataState? This function will be called again by the socket's readyRead
 494             if (replyPrivate->state == QHttpNetworkReplyPrivate::ReadingDataState)
 495                 break;
 496
 497             // everything done, fall through
 498             }
 499       case QHttpNetworkReplyPrivate::AllDoneState:
 500             allDone();
 501             break;
 502         default:
 503             break;
 504         }
 505     } while (bytes != lastBytes && reply);
 506 }
 507
 508 // called when unexpectedly reading a -1 or when data is expected but socket is closed
 509 void QHttpNetworkConnectionChannel::handleUnexpectedEOF()
 510 {
 511     Q_ASSERT(reply);
 512     if (reconnectAttempts <= 0) {
 513         // too many errors reading/receiving/parsing the status, close the socket and emit error
 514         requeueCurrentlyPipelinedRequests();
 515         close();
 516         reply->d_func()->errorString = connection->d_func()->errorDetail(QNetworkReply::RemoteHostClosedError, socket);
 517         emit reply->finishedWithError(QNetworkReply::RemoteHostClosedError, reply->d_func()->errorString);
 518         QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 519     } else {
 520         reconnectAttempts--;
 521         reply->d_func()->clear();
 522         reply->d_func()->connection = connection;
 523         reply->d_func()->connectionChannel = this;
 524         closeAndResendCurrentRequest();
 525     }
 526 }
 527
 528 bool QHttpNetworkConnectionChannel::ensureConnection()
 529 {
 530     QAbstractSocket::SocketState socketState = socket->state();
 531
 532     // resend this request after we receive the disconnected signal
 533     if (socketState == QAbstractSocket::ClosingState) {
 534         if (reply)
 535             resendCurrent = true;
 536         return false;
 537     }
 538
 539     // already trying to connect?
 540     if (socketState == QAbstractSocket::HostLookupState ||
 541         socketState == QAbstractSocket::ConnectingState) {
 542         return false;
 543     }
 544
 545     // make sure that this socket is in a connected state, if not initiate
 546     // connection to the host.
 547     if (socketState != QAbstractSocket::ConnectedState) {
 548         // connect to the host if not already connected.
 549         state = QHttpNetworkConnectionChannel::ConnectingState;
 550         pendingEncrypt = ssl;
 551
 552         // reset state
 553         pipeliningSupported = PipeliningSupportUnknown;
 554         authenticationCredentialsSent = false;
 555         proxyCredentialsSent = false;
 556         authenticator.detach();
 557         QAuthenticatorPrivate *priv = QAuthenticatorPrivate::getPrivate(authenticator);
 558         priv->hasFailed = false;
 559         proxyAuthenticator.detach();
 560         priv = QAuthenticatorPrivate::getPrivate(proxyAuthenticator);
 561         priv->hasFailed = false;
 562
 563         // This workaround is needed since we use QAuthenticator for NTLM authentication. The "phase == Done"
 564         // is the usual criteria for emitting authentication signals. The "phase" is set to "Done" when the
 565         // last header for Authorization is generated by the QAuthenticator. Basic & Digest logic does not
 566         // check the "phase" for generating the Authorization header. NTLM authentication is a two stage
 567         // process & needs the "phase". To make sure the QAuthenticator uses the current username/password
 568         // the phase is reset to Start.
 569         priv = QAuthenticatorPrivate::getPrivate(authenticator);
 570         if (priv && priv->phase == QAuthenticatorPrivate::Done)
 571             priv->phase = QAuthenticatorPrivate::Start;
 572         priv = QAuthenticatorPrivate::getPrivate(proxyAuthenticator);
 573         if (priv && priv->phase == QAuthenticatorPrivate::Done)
 574             priv->phase = QAuthenticatorPrivate::Start;
 575
 576         QString connectHost = connection->d_func()->hostName;
 577         qint16 connectPort = connection->d_func()->port;
 578
 579 #ifndef QT_NO_NETWORKPROXY
 580         // HTTPS always use transparent proxy.
 581         if (connection->d_func()->networkProxy.type() != QNetworkProxy::NoProxy && !ssl) {
 582             connectHost = connection->d_func()->networkProxy.hostName();
 583             connectPort = connection->d_func()->networkProxy.port();
 584         }
 585         if (socket->proxy().type() == QNetworkProxy::HttpProxy) {
 586             // Make user-agent field available to HTTP proxy socket engine (QTBUG-17223)
 587             QByteArray value;
 588             // ensureConnection is called before any request has been assigned, but can also be called again if reconnecting
 589             if (request.url().isEmpty())
 590                 value = connection->d_func()->predictNextRequest().headerField("user-agent");
 591             else
 592                 value = request.headerField("user-agent");
 593             if (!value.isEmpty()) {
 594                 QNetworkProxy proxy(socket->proxy());
 595                 proxy.setRawHeader("User-Agent", value); //detaches
 596                 socket->setProxy(proxy);
 597             }
 598         }
 599 #endif
 600         if (ssl) {
 601 #ifndef QT_NO_SSL
 602             QSslSocket *sslSocket = qobject_cast<QSslSocket*>(socket);
 603             sslSocket->connectToHostEncrypted(connectHost, connectPort, QIODevice::ReadWrite, networkLayerPreference);
 604             if (ignoreAllSslErrors)
 605                 sslSocket->ignoreSslErrors();
 606             sslSocket->ignoreSslErrors(ignoreSslErrorsList);
 607
 608             // limit the socket read buffer size. we will read everything into
 609             // the QHttpNetworkReply anyway, so let's grow only that and not
 610             // here and there.
 611             socket->setReadBufferSize(64*1024);
 612 #else
 613             // Need to dequeue the request so that we can emit the error.
 614             if (!reply)
 615                 connection->d_func()->dequeueRequest(socket);
 616             connection->d_func()->emitReplyError(socket, reply, QNetworkReply::ProtocolUnknownError);
 617 #endif
 618         } else {
 619             // In case of no proxy we can use the Unbuffered QTcpSocket
 620 #ifndef QT_NO_NETWORKPROXY
 621             if (connection->d_func()->networkProxy.type() == QNetworkProxy::NoProxy
 622                     && connection->cacheProxy().type() == QNetworkProxy::NoProxy
 623                     && connection->transparentProxy().type() == QNetworkProxy::NoProxy) {
 624 #endif
 625                 socket->connectToHost(connectHost, connectPort, QIODevice::ReadWrite | QIODevice::Unbuffered, networkLayerPreference);
 626                 // For an Unbuffered QTcpSocket, the read buffer size has a special meaning.
 627                 socket->setReadBufferSize(1*1024);
 628 #ifndef QT_NO_NETWORKPROXY
 629             } else {
 630                 socket->connectToHost(connectHost, connectPort, QIODevice::ReadWrite, networkLayerPreference);
 631
 632                 // limit the socket read buffer size. we will read everything into
 633                 // the QHttpNetworkReply anyway, so let's grow only that and not
 634                 // here and there.
 635                 socket->setReadBufferSize(64*1024);
 636             }
 637 #endif
 638         }
 639         return false;
 640     }
 641     return true;
 642 }
 643
 644 void QHttpNetworkConnectionChannel::allDone()
 645 {
 646     Q_ASSERT(reply);
 647
 648     if (!reply) {
 649         qWarning() << "QHttpNetworkConnectionChannel::allDone() called without reply. Please report at http://bugreports.qt-project.org/";
 650         return;
 651     }
 652
 653     // while handling 401 & 407, we might reset the status code, so save this.
 654     bool emitFinished = reply->d_func()->shouldEmitSignals();
 655     bool connectionCloseEnabled = reply->d_func()->isConnectionCloseEnabled();
 656     detectPipeliningSupport();
 657
 658     handleStatus();
 659     // handleStatus() might have removed the reply because it already called connection->emitReplyError()
 660
 661     // queue the finished signal, this is required since we might send new requests from
 662     // slot connected to it. The socket will not fire readyRead signal, if we are already
 663     // in the slot connected to readyRead
 664     if (reply && emitFinished)
 665         QMetaObject::invokeMethod(reply, "finished", Qt::QueuedConnection);
 666
 667
 668     // reset the reconnection attempts after we receive a complete reply.
 669     // in case of failures, each channel will attempt two reconnects before emitting error.
 670     reconnectAttempts = 2;
 671
 672     // now the channel can be seen as free/idle again, all signal emissions for the reply have been done
 673     if (state != QHttpNetworkConnectionChannel::ClosingState)
 674         state = QHttpNetworkConnectionChannel::IdleState;
 675
 676     // if it does not need to be sent again we can set it to 0
 677     // the previous code did not do that and we had problems with accidental re-sending of a
 678     // finished request.
 679     // Note that this may trigger a segfault at some other point. But then we can fix the underlying
 680     // problem.
 681     if (!resendCurrent) {
 682         request = QHttpNetworkRequest();
 683         reply = 0;
 684     }
 685
 686     // move next from pipeline to current request
 687     if (!alreadyPipelinedRequests.isEmpty()) {
 688         if (resendCurrent || connectionCloseEnabled || socket->state() != QAbstractSocket::ConnectedState) {
 689             // move the pipelined ones back to the main queue
 690             requeueCurrentlyPipelinedRequests();
 691             close();
 692         } else {
 693             // there were requests pipelined in and we can continue
 694             HttpMessagePair messagePair = alreadyPipelinedRequests.takeFirst();
 695
 696             request = messagePair.first;
 697             reply = messagePair.second;
 698             state = QHttpNetworkConnectionChannel::ReadingState;
 699             resendCurrent = false;
 700
 701             written = 0; // message body, excluding the header, irrelevant here
 702             bytesTotal = 0; // message body total, excluding the header, irrelevant here
 703
 704             // pipeline even more
 705             connection->d_func()->fillPipeline(socket);
 706
 707             // continue reading
 708             //_q_receiveReply();
 709             // this was wrong, allDone gets called from that function anyway.
 710         }
 711     } else if (alreadyPipelinedRequests.isEmpty() && socket->bytesAvailable() > 0) {
 712         // this is weird. we had nothing pipelined but still bytes available. better close it.
 713         //if (socket->bytesAvailable() > 0)
 714         //    close();
 715         //
 716         // FIXME
 717         // We do not close it anymore now, but should introduce this again after having fixed
 718         // the chunked decoder in QHttpNetworkReply to read the whitespace after the last chunk.
 719         // (Currently this is worked around by readStatus in the QHttpNetworkReply ignoring
 720         // leading whitespace.
 721         QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 722     } else if (alreadyPipelinedRequests.isEmpty()) {
 723         if (connectionCloseEnabled)
 724             if (socket->state() != QAbstractSocket::UnconnectedState)
 725                 close();
 726         if (qobject_cast<QHttpNetworkConnection*>(connection))
 727             QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 728     }
 729 }
 730
 731 void QHttpNetworkConnectionChannel::detectPipeliningSupport()
 732 {
 733     Q_ASSERT(reply);
 734     // detect HTTP Pipelining support
 735     QByteArray serverHeaderField;
 736     if (
 737             // check for HTTP/1.1
 738             (reply->d_func()->majorVersion == 1 && reply->d_func()->minorVersion == 1)
 739             // check for not having connection close
 740             && (!reply->d_func()->isConnectionCloseEnabled())
 741             // check if it is still connected
 742             && (socket->state() == QAbstractSocket::ConnectedState)
 743             // check for broken servers in server reply header
 744             // this is adapted from http://mxr.mozilla.org/firefox/ident?i=SupportsPipelining
 745             && (serverHeaderField = reply->headerField("Server"), !serverHeaderField.contains("Microsoft-IIS/4."))
 746             && (!serverHeaderField.contains("Microsoft-IIS/5."))
 747             && (!serverHeaderField.contains("Netscape-Enterprise/3."))
 748             // this is adpoted from the knowledge of the Nokia 7.x browser team (DEF143319)
 749             && (!serverHeaderField.contains("WebLogic"))
 750             && (!serverHeaderField.startsWith("Rocket")) // a Python Web Server, see Web2py.com
 751             ) {
 752         pipeliningSupported = QHttpNetworkConnectionChannel::PipeliningProbablySupported;
 753     } else {
 754         pipeliningSupported = QHttpNetworkConnectionChannel::PipeliningSupportUnknown;
 755     }
 756 }
 757
 758 // called when the connection broke and we need to queue some pipelined requests again
 759 void QHttpNetworkConnectionChannel::requeueCurrentlyPipelinedRequests()
 760 {
 761     for (int i = 0; i < alreadyPipelinedRequests.length(); i++)
 762         connection->d_func()->requeueRequest(alreadyPipelinedRequests.at(i));
 763     alreadyPipelinedRequests.clear();
 764
 765     // only run when the QHttpNetworkConnection is not currently being destructed, e.g.
 766     // this function is called from _q_disconnected which is called because
 767     // of ~QHttpNetworkConnectionPrivate
 768     if (qobject_cast<QHttpNetworkConnection*>(connection))
 769         QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 770 }
 771
 772 void QHttpNetworkConnectionChannel::handleStatus()
 773 {
 774     Q_ASSERT(socket);
 775     Q_ASSERT(reply);
 776
 777     int statusCode = reply->statusCode();
 778     bool resend = false;
 779
 780     switch (statusCode) {
 781     case 401: // auth required
 782     case 407: // proxy auth required
 783         if (connection->d_func()->handleAuthenticateChallenge(socket, reply, (statusCode == 407), resend)) {
 784             if (resend) {
 785                 if (!resetUploadData())
 786                     break;
 787
 788                 reply->d_func()->eraseData();
 789
 790                 if (alreadyPipelinedRequests.isEmpty()) {
 791                     // this does a re-send without closing the connection
 792                     resendCurrent = true;
 793                     QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 794                 } else {
 795                     // we had requests pipelined.. better close the connection in closeAndResendCurrentRequest
 796                     closeAndResendCurrentRequest();
 797                     QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 798                 }
 799             } else {
 800                 //authentication cancelled, close the channel.
 801                 close();
 802             }
 803         } else {
 804             emit reply->headerChanged();
 805             emit reply->readyRead();
 806             QNetworkReply::NetworkError errorCode = (statusCode == 407)
 807                 ? QNetworkReply::ProxyAuthenticationRequiredError
 808                 : QNetworkReply::AuthenticationRequiredError;
 809             reply->d_func()->errorString = connection->d_func()->errorDetail(errorCode, socket);
 810             emit reply->finishedWithError(errorCode, reply->d_func()->errorString);
 811         }
 812         break;
 813     default:
 814         if (qobject_cast<QHttpNetworkConnection*>(connection))
 815             QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 816     }
 817 }
 818
 819 bool QHttpNetworkConnectionChannel::resetUploadData()
 820 {
 821     if (!reply) {
 822         //this happens if server closes connection while QHttpNetworkConnectionPrivate::_q_startNextRequest is pending
 823         return false;
 824     }
 825     QNonContiguousByteDevice* uploadByteDevice = request.uploadByteDevice();
 826     if (!uploadByteDevice)
 827         return true;
 828
 829     if (uploadByteDevice->reset()) {
 830         written = 0;
 831         return true;
 832     } else {
 833         connection->d_func()->emitReplyError(socket, reply, QNetworkReply::ContentReSendError);
 834         return false;
 835     }
 836 }
 837
 838
 839 void QHttpNetworkConnectionChannel::pipelineInto(HttpMessagePair &pair)
 840 {
 841     // this is only called for simple GET
 842
 843     QHttpNetworkRequest &request = pair.first;
 844     QHttpNetworkReply *reply = pair.second;
 845     reply->d_func()->clear();
 846     reply->d_func()->connection = connection;
 847     reply->d_func()->connectionChannel = this;
 848     reply->d_func()->autoDecompress = request.d->autoDecompress;
 849     reply->d_func()->pipeliningUsed = true;
 850
 851 #ifndef QT_NO_NETWORKPROXY
 852     pipeline.append(QHttpNetworkRequestPrivate::header(request,
 853                                                            (connection->d_func()->networkProxy.type() != QNetworkProxy::NoProxy)));
 854 #else
 855     pipeline.append(QHttpNetworkRequestPrivate::header(request, false));
 856 #endif
 857
 858     alreadyPipelinedRequests.append(pair);
 859
 860     // pipelineFlush() needs to be called at some point afterwards
 861 }
 862
 863 void QHttpNetworkConnectionChannel::pipelineFlush()
 864 {
 865     if (pipeline.isEmpty())
 866         return;
 867
 868     // The goal of this is so that we have everything in one TCP packet.
 869     // For the Unbuffered QTcpSocket this is manually needed, the buffered
 870     // QTcpSocket does it automatically.
 871     // Also, sometimes the OS does it for us (Nagle's algorithm) but that
 872     // happens only sometimes.
 873     socket->write(pipeline);
 874     pipeline.clear();
 875 }
 876
 877
 878 void QHttpNetworkConnectionChannel::closeAndResendCurrentRequest()
 879 {
 880     requeueCurrentlyPipelinedRequests();
 881     close();
 882     if (reply)
 883         resendCurrent = true;
 884     if (qobject_cast<QHttpNetworkConnection*>(connection))
 885         QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 886 }
 887
 888 bool QHttpNetworkConnectionChannel::isSocketBusy() const
 889 {
 890     return (state & QHttpNetworkConnectionChannel::BusyState);
 891 }
 892
 893 bool QHttpNetworkConnectionChannel::isSocketWriting() const
 894 {
 895     return (state & QHttpNetworkConnectionChannel::WritingState);
 896 }
 897
 898 bool QHttpNetworkConnectionChannel::isSocketWaiting() const
 899 {
 900     return (state & QHttpNetworkConnectionChannel::WaitingState);
 901 }
 902
 903 bool QHttpNetworkConnectionChannel::isSocketReading() const
 904 {
 905     return (state & QHttpNetworkConnectionChannel::ReadingState);
 906 }
 907
 908 //private slots
 909 void QHttpNetworkConnectionChannel::_q_readyRead()
 910 {
 911     if (socket->state() == QAbstractSocket::ConnectedState && socket->bytesAvailable() == 0) {
 912         // We got a readyRead but no bytes are available..
 913         // This happens for the Unbuffered QTcpSocket
 914         // Also check if socket is in ConnectedState since
 915         // this function may also be invoked via the event loop.
 916         char c;
 917         qint64  ret = socket->peek(&c, 1);
 918         if (ret < 0) {
 919             _q_error(socket->error());
 920             // We still need to handle the reply so it emits its signals etc.
 921             if (reply)
 922                 _q_receiveReply();
 923             return;
 924         }
 925     }
 926
 927     if (isSocketWaiting() || isSocketReading()) {
 928         state = QHttpNetworkConnectionChannel::ReadingState;
 929         if (reply)
 930             _q_receiveReply();
 931     }
 932 }
 933
 934 void QHttpNetworkConnectionChannel::_q_bytesWritten(qint64 bytes)
 935 {
 936     Q_UNUSED(bytes);
 937     // bytes have been written to the socket. write even more of them :)
 938     if (isSocketWriting())
 939         sendRequest();
 940     // otherwise we do nothing
 941 }
 942
 943 void QHttpNetworkConnectionChannel::_q_disconnected()
 944 {
 945     if (state == QHttpNetworkConnectionChannel::ClosingState) {
 946         state = QHttpNetworkConnectionChannel::IdleState;
 947         QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 948         return;
 949     }
 950
 951     // read the available data before closing
 952     if (isSocketWaiting() || isSocketReading()) {
 953         if (reply) {
 954             state = QHttpNetworkConnectionChannel::ReadingState;
 955             _q_receiveReply();
 956         }
 957     } else if (state == QHttpNetworkConnectionChannel::IdleState && resendCurrent) {
 958         // re-sending request because the socket was in ClosingState
 959         QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 960     }
 961     state = QHttpNetworkConnectionChannel::IdleState;
 962
 963     requeueCurrentlyPipelinedRequests();
 964     close();
 965 }
 966
 967
 968 void QHttpNetworkConnectionChannel::_q_connected()
 969 {
 970     // For the Happy Eyeballs we need to check if this is the first channel to connect.
 971     if (!pendingEncrypt) {
 972         if (connection->d_func()->networkLayerState == QHttpNetworkConnectionPrivate::InProgress) {
 973             if (connection->d_func()->delayedConnectionTimer.isActive())
 974                 connection->d_func()->delayedConnectionTimer.stop();
 975             if (networkLayerPreference == QAbstractSocket::IPv4Protocol)
 976                 connection->d_func()->networkLayerState = QHttpNetworkConnectionPrivate::IPv4;
 977             else if (networkLayerPreference == QAbstractSocket::IPv6Protocol)
 978                 connection->d_func()->networkLayerState = QHttpNetworkConnectionPrivate::IPv6;
 979             else {
 980                 if (socket->peerAddress().protocol() == QAbstractSocket::IPv4Protocol)
 981                     connection->d_func()->networkLayerState = QHttpNetworkConnectionPrivate::IPv4;
 982                 else
 983                     connection->d_func()->networkLayerState = QHttpNetworkConnectionPrivate::IPv6;
 984             }
 985         } else {
 986             if (((connection->d_func()->networkLayerState == QHttpNetworkConnectionPrivate::IPv4) && (networkLayerPreference != QAbstractSocket::IPv4Protocol))
 987                 || ((connection->d_func()->networkLayerState == QHttpNetworkConnectionPrivate::IPv6) && (networkLayerPreference != QAbstractSocket::IPv6Protocol))) {
 988                 close();
 989                 // This is the second connection so it has to be closed and we can schedule it for another request.
 990                 QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection);
 991                 return;
 992             }
 993             //The connections networkLayerState had already been decided.
 994         }
 995     }
 996
 997     // improve performance since we get the request sent by the kernel ASAP
 998     //socket->setSocketOption(QAbstractSocket::LowDelayOption, 1);
 999     // We have this commented out now. It did not have the effect we wanted. If we want to
1000     // do this properly, Qt has to combine multiple HTTP requests into one buffer
1001     // and send this to the kernel in one syscall and then the kernel immediately sends
1002     // it as one TCP packet because of TCP_NODELAY.
1003     // However, this code is currently not in Qt, so we rely on the kernel combining
1004     // the requests into one TCP packet.
1005
1006     // not sure yet if it helps, but it makes sense
1007     socket->setSocketOption(QAbstractSocket::KeepAliveOption, 1);
1008
1009     pipeliningSupported = QHttpNetworkConnectionChannel::PipeliningSupportUnknown;
1010
1011     // ### FIXME: if the server closes the connection unexpectedly, we shouldn't send the same broken request again!
1012     //channels[i].reconnectAttempts = 2;
1013     if (!pendingEncrypt) {
1014         state = QHttpNetworkConnectionChannel::IdleState;
1015         if (!reply)
1016             connection->d_func()->dequeueRequest(socket);
1017         if (reply)
1018             sendRequest();
1019     }
1020 }
1021
1022
1023 void QHttpNetworkConnectionChannel::_q_error(QAbstractSocket::SocketError socketError)
1024 {
1025     if (!socket)
1026         return;
1027     QNetworkReply::NetworkError errorCode = QNetworkReply::UnknownNetworkError;
1028
1029     switch (socketError) {
1030     case QAbstractSocket::HostNotFoundError:
1031         errorCode = QNetworkReply::HostNotFoundError;
1032         break;
1033     case QAbstractSocket::ConnectionRefusedError:
1034         errorCode = QNetworkReply::ConnectionRefusedError;
1035         break;
1036     case QAbstractSocket::RemoteHostClosedError:
1037         // try to reconnect/resend before sending an error.
1038         // while "Reading" the _q_disconnected() will handle this.
1039         if (state != QHttpNetworkConnectionChannel::IdleState && state != QHttpNetworkConnectionChannel::ReadingState) {
1040             if (reconnectAttempts-- > 0) {
1041                 closeAndResendCurrentRequest();
1042                 return;
1043             } else {
1044                 errorCode = QNetworkReply::RemoteHostClosedError;
1045             }
1046         } else if (state == QHttpNetworkConnectionChannel::ReadingState) {
1047             if (!reply->d_func()->expectContent()) {
1048                 // No content expected, this is a valid way to have the connection closed by the server
1049                 return;
1050             }
1051             if (reply->contentLength() == -1 && !reply->d_func()->isChunked()) {
1052                 // There was no content-length header and it's not chunked encoding,
1053                 // so this is a valid way to have the connection closed by the server
1054                 return;
1055             }
1056             // ok, we got a disconnect even though we did not expect it
1057             errorCode = QNetworkReply::RemoteHostClosedError;
1058         } else {
1059             errorCode = QNetworkReply::RemoteHostClosedError;
1060         }
1061         break;
1062     case QAbstractSocket::SocketTimeoutError:
1063         // try to reconnect/resend before sending an error.
1064         if (state == QHttpNetworkConnectionChannel::WritingState && (reconnectAttempts-- > 0)) {
1065             closeAndResendCurrentRequest();
1066             return;
1067         }
1068         errorCode = QNetworkReply::TimeoutError;
1069         break;
1070     case QAbstractSocket::ProxyAuthenticationRequiredError:
1071         errorCode = QNetworkReply::ProxyAuthenticationRequiredError;
1072         break;
1073     case QAbstractSocket::SslHandshakeFailedError:
1074         errorCode = QNetworkReply::SslHandshakeFailedError;
1075         break;
1076     default:
1077         // all other errors are treated as NetworkError
1078         errorCode = QNetworkReply::UnknownNetworkError;
1079         break;
1080     }
1081     QPointer<QHttpNetworkConnection> that = connection;
1082     QString errorString = connection->d_func()->errorDetail(errorCode, socket, socket->errorString());
1083
1084     // In the InProgress state the channel should not emit the error.
1085     // This will instead be handled by the connection.
1086     if (!connection->d_func()->shouldEmitChannelError(socket))
1087         return;
1088
1089     // Need to dequeu the request so that we can emit the error.
1090     if (!reply)
1091         connection->d_func()->dequeueRequest(socket);
1092     if (reply) {
1093         reply->d_func()->errorString = errorString;
1094         emit reply->finishedWithError(errorCode, errorString);
1095         reply = 0;
1096     }
1097     // send the next request
1098     QMetaObject::invokeMethod(that, "_q_startNextRequest", Qt::QueuedConnection);
1099
1100     if (that) //signal emission triggered event loop
1101         close();
1102 }
1103
1104 #ifndef QT_NO_NETWORKPROXY
1105 void QHttpNetworkConnectionChannel::_q_proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator* auth)
1106 {
1107     // Need to dequeue the request before we can emit the error.
1108     if (!reply)
1109         connection->d_func()->dequeueRequest(socket);
1110     if (reply)
1111         connection->d_func()->emitProxyAuthenticationRequired(this, proxy, auth);
1112 }
1113 #endif
1114
1115 void QHttpNetworkConnectionChannel::_q_uploadDataReadyRead()
1116 {
1117     sendRequest();
1118 }
1119
1120 #ifndef QT_NO_SSL
1121 void QHttpNetworkConnectionChannel::_q_encrypted()
1122 {
1123     if (!socket)
1124         return; // ### error
1125     state = QHttpNetworkConnectionChannel::IdleState;
1126     pendingEncrypt = false;
1127     if (!reply)
1128         connection->d_func()->dequeueRequest(socket);
1129     if (reply)
1130         sendRequest();
1131 }
1132
1133 void QHttpNetworkConnectionChannel::_q_sslErrors(const QList<QSslError> &errors)
1134 {
1135     if (!socket)
1136         return;
1137     //QNetworkReply::NetworkError errorCode = QNetworkReply::ProtocolFailure;
1138     // Also pause the connection because socket notifiers may fire while an user
1139     // dialog is displaying
1140     connection->d_func()->pauseConnection();
1141     if (pendingEncrypt && !reply)
1142         connection->d_func()->dequeueRequest(socket);
1143     if (reply)
1144         emit reply->sslErrors(errors);
1145     connection->d_func()->resumeConnection();
1146 }
1147
1148 void QHttpNetworkConnectionChannel::_q_encryptedBytesWritten(qint64 bytes)
1149 {
1150     Q_UNUSED(bytes);
1151     // bytes have been written to the socket. write even more of them :)
1152     if (isSocketWriting())
1153         sendRequest();
1154     // otherwise we do nothing
1155 }
1156
1157 #endif
1158
1159 void QHttpNetworkConnectionChannel::setConnection(QHttpNetworkConnection *c)
1160 {
1161     // Inlining this function in the header leads to compiler error on
1162     // release-armv5, on at least timebox 9.2 and 10.1.
1163     connection = c;
1164 }
1165
1166 QT_END_NAMESPACE
1167
1168 #include "moc_qhttpnetworkconnectionchannel_p.cpp"
1169
1170 #endif // QT_NO_HTTP