text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the QtNetwork module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
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  ** Alternatively, this file may be used under the terms of the GNU Lesser
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  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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  **
  ****************************************************************************/
  
  #ifndef QNETWORKREPLYHTTPIMPL_P_H
  #define QNETWORKREPLYHTTPIMPL_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists for the convenience
  // of the Network Access API.  This header file may change from
  // version to version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include "qnetworkrequest.h"
  #include "qnetworkreply.h"
  
  #include "QtCore/qpointer.h"
  #include "QtCore/qdatetime.h"
  #include "QtCore/qsharedpointer.h"
  #include "qatomic.h"
  
  #include <QtNetwork/QNetworkCacheMetaData>
  #include <private/qhttpnetworkrequest_p.h>
  #include <private/qbytedata_p.h>
  #include <private/qnetworkreply_p.h>
  #include <QtNetwork/QNetworkProxy>
  #include <QtNetwork/QNetworkSession>
  
  #ifndef QT_NO_SSL
  #include <QtNetwork/QSslConfiguration>
  #endif
  
  #ifndef QT_NO_HTTP
  
  QT_BEGIN_NAMESPACE
  
  class QIODevice;
  
  class QNetworkReplyHttpImplPrivate;
  class QNetworkReplyHttpImpl: public QNetworkReply
  {
      Q_OBJECT
  public:
      QNetworkReplyHttpImpl(QNetworkAccessManager* const, const QNetworkRequest&, QNetworkAccessManager::Operation&, QIODevice* outgoingData);
      virtual ~QNetworkReplyHttpImpl();
  
      void close() Q_DECL_OVERRIDE;
      void abort() Q_DECL_OVERRIDE;
      qint64 bytesAvailable() const Q_DECL_OVERRIDE;
      bool isSequential () const Q_DECL_OVERRIDE;
      qint64 size() const Q_DECL_OVERRIDE;
      qint64 readData(char*, qint64) Q_DECL_OVERRIDE;
      void setReadBufferSize(qint64 size) Q_DECL_OVERRIDE;
      bool canReadLine () const Q_DECL_OVERRIDE;
  
      Q_DECLARE_PRIVATE(QNetworkReplyHttpImpl)
      Q_PRIVATE_SLOT(d_func(), void _q_startOperation())
      Q_PRIVATE_SLOT(d_func(), bool start(const QNetworkRequest &))
      Q_PRIVATE_SLOT(d_func(), void _q_cacheLoadReadyRead())
      Q_PRIVATE_SLOT(d_func(), void _q_bufferOutgoingData())
      Q_PRIVATE_SLOT(d_func(), void _q_bufferOutgoingDataFinished())
  #ifndef QT_NO_BEARERMANAGEMENT
      Q_PRIVATE_SLOT(d_func(), void _q_networkSessionConnected())
      Q_PRIVATE_SLOT(d_func(), void _q_networkSessionFailed())
      Q_PRIVATE_SLOT(d_func(), void _q_networkSessionStateChanged(QNetworkSession::State))
      Q_PRIVATE_SLOT(d_func(), void _q_networkSessionUsagePoliciesChanged(QNetworkSession::UsagePolicies))
  #endif
      Q_PRIVATE_SLOT(d_func(), void _q_finished())
      Q_PRIVATE_SLOT(d_func(), void _q_error(QNetworkReply::NetworkError, const QString &))
  
      // From reply
      Q_PRIVATE_SLOT(d_func(), void replyDownloadData(QByteArray))
      Q_PRIVATE_SLOT(d_func(), void replyFinished())
      Q_PRIVATE_SLOT(d_func(), void replyDownloadMetaData(QList<QPair<QByteArray,QByteArray> >,
                                                          int, QString, bool, QSharedPointer<char>,
                                                          qint64, bool))
      Q_PRIVATE_SLOT(d_func(), void replyDownloadProgressSlot(qint64,qint64))
      Q_PRIVATE_SLOT(d_func(), void httpAuthenticationRequired(const QHttpNetworkRequest &, QAuthenticator *))
      Q_PRIVATE_SLOT(d_func(), void httpError(QNetworkReply::NetworkError, const QString &))
  #ifndef QT_NO_SSL
      Q_PRIVATE_SLOT(d_func(), void replyEncrypted())
      Q_PRIVATE_SLOT(d_func(), void replySslErrors(const QList<QSslError> &, bool *, QList<QSslError> *))
      Q_PRIVATE_SLOT(d_func(), void replySslConfigurationChanged(const QSslConfiguration&))
      Q_PRIVATE_SLOT(d_func(), void replyPreSharedKeyAuthenticationRequiredSlot(QSslPreSharedKeyAuthenticator *))
  #endif
  #ifndef QT_NO_NETWORKPROXY
      Q_PRIVATE_SLOT(d_func(), void proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *auth))
  #endif
  
      Q_PRIVATE_SLOT(d_func(), void resetUploadDataSlot(bool *r))
      Q_PRIVATE_SLOT(d_func(), void wantUploadDataSlot(qint64))
      Q_PRIVATE_SLOT(d_func(), void sentUploadDataSlot(qint64,qint64))
      Q_PRIVATE_SLOT(d_func(), void uploadByteDeviceReadyReadSlot())
      Q_PRIVATE_SLOT(d_func(), void emitReplyUploadProgress(qint64, qint64))
      Q_PRIVATE_SLOT(d_func(), void _q_cacheSaveDeviceAboutToClose())
      Q_PRIVATE_SLOT(d_func(), void _q_metaDataChanged())
      Q_PRIVATE_SLOT(d_func(), void onRedirected(const QUrl &, int, int))
  
  #ifndef QT_NO_SSL
  protected:
      void ignoreSslErrors() Q_DECL_OVERRIDE;
      void ignoreSslErrorsImplementation(const QList<QSslError> &errors) Q_DECL_OVERRIDE;
      void setSslConfigurationImplementation(const QSslConfiguration &configuration) Q_DECL_OVERRIDE;
      void sslConfigurationImplementation(QSslConfiguration &configuration) const Q_DECL_OVERRIDE;
  #endif
  
  signals:
      // To HTTP thread:
      void startHttpRequest();
      void abortHttpRequest();
      void readBufferSizeChanged(qint64 size);
      void readBufferFreed(qint64 size);
  
      void startHttpRequestSynchronously();
  
      void haveUploadData(const qint64 pos, QByteArray dataArray, bool dataAtEnd, qint64 dataSize);
  };
  
  class QNetworkReplyHttpImplPrivate: public QNetworkReplyPrivate
  {
  public:
  
      static QHttpNetworkRequest::Priority convert(const QNetworkRequest::Priority& prio);
  
      QNetworkReplyHttpImplPrivate();
      ~QNetworkReplyHttpImplPrivate();
  
      bool start(const QNetworkRequest &newHttpRequest);
      void _q_startOperation();
  
      void _q_cacheLoadReadyRead();
  
      void _q_bufferOutgoingData();
      void _q_bufferOutgoingDataFinished();
  
      void _q_cacheSaveDeviceAboutToClose();
  
  #ifndef QT_NO_BEARERMANAGEMENT
      void _q_networkSessionConnected();
      void _q_networkSessionFailed();
      void _q_networkSessionStateChanged(QNetworkSession::State);
      void _q_networkSessionUsagePoliciesChanged(QNetworkSession::UsagePolicies);
  #endif
      void _q_finished();
  
      void finished();
      void error(QNetworkReply::NetworkError code, const QString &errorString);
      void _q_error(QNetworkReply::NetworkError code, const QString &errorString);
      void _q_metaDataChanged();
  
      void checkForRedirect(const int statusCode);
  
      // incoming from user
      QNetworkAccessManager *manager;
      QNetworkAccessManagerPrivate *managerPrivate;
      QHttpNetworkRequest httpRequest; // There is also a copy in the HTTP thread
      bool synchronous;
  
      State state;
  
      // from http thread
      int statusCode;
      QString reasonPhrase;
  
      // upload
      QNonContiguousByteDevice* createUploadByteDevice();
      QSharedPointer<QNonContiguousByteDevice> uploadByteDevice;
      qint64 uploadByteDevicePosition;
      bool uploadDeviceChoking; // if we couldn't readPointer() any data at the moment
      QIODevice *outgoingData;
      QSharedPointer<QRingBuffer> outgoingDataBuffer;
      void emitReplyUploadProgress(qint64 bytesSent, qint64 bytesTotal); // dup?
      void onRedirected(const QUrl &redirectUrl, int httpStatus, int maxRedirectsRemainig);
      qint64 bytesUploaded;
  
  
      // cache
      void createCache();
      void completeCacheSave();
      void setCachingEnabled(bool enable);
      bool isCachingEnabled() const;
      bool isCachingAllowed() const;
      void initCacheSaveDevice();
      QIODevice *cacheLoadDevice;
      bool loadingFromCache;
  
      QIODevice *cacheSaveDevice;
      bool cacheEnabled; // is this for saving?
  
  
      QUrl urlForLastAuthentication;
  #ifndef QT_NO_NETWORKPROXY
      QNetworkProxy lastProxyAuthentication;
  #endif
  
  
      bool migrateBackend();
      bool canResume() const;
      void setResumeOffset(quint64 offset);
      quint64 resumeOffset;
      qint64 preMigrationDownloaded;
  
      // Used for normal downloading. For "zero copy" the downloadZerocopyBuffer is used
      QByteDataBuffer downloadMultiBuffer;
      QByteDataBuffer pendingDownloadData; // For signal compression
      qint64 bytesDownloaded;
  
      // only used when the "zero copy" style is used. Else downloadMultiBuffer is used.
      // Please note that the whole "zero copy" download buffer API is private right now. Do not use it.
      qint64 downloadBufferReadPosition;
      qint64 downloadBufferCurrentSize;
      QSharedPointer<char> downloadBufferPointer;
      char* downloadZerocopyBuffer;
  
      // Will be increased by HTTP thread:
      QSharedPointer<QAtomicInt> pendingDownloadDataEmissions;
      QSharedPointer<QAtomicInt> pendingDownloadProgressEmissions;
  
  
  #ifndef QT_NO_SSL
      QSslConfiguration sslConfiguration;
      bool pendingIgnoreAllSslErrors;
      QList<QSslError> pendingIgnoreSslErrorsList;
  #endif
  
  
      bool loadFromCacheIfAllowed(QHttpNetworkRequest &httpRequest);
      void invalidateCache();
      bool sendCacheContents(const QNetworkCacheMetaData &metaData);
      QNetworkCacheMetaData fetchCacheMetaData(const QNetworkCacheMetaData &metaData) const;
  
  
      void postRequest(const QNetworkRequest& newHttpRequest);
      QNetworkAccessManager::Operation getRedirectOperation(QNetworkAccessManager::Operation currentOp, int httpStatus);
      QNetworkRequest createRedirectRequest(const QNetworkRequest &originalRequests, const QUrl &url, int maxRedirectsRemainig);
      bool isHttpRedirectResponse() const;
  
  public:
      // From HTTP thread:
      void replyDownloadData(QByteArray);
      void replyFinished();
      void replyDownloadMetaData(QList<QPair<QByteArray,QByteArray> >, int, QString, bool,
                                 QSharedPointer<char>, qint64, bool);
      void replyDownloadProgressSlot(qint64,qint64);
      void httpAuthenticationRequired(const QHttpNetworkRequest &request, QAuthenticator *auth);
      void httpError(QNetworkReply::NetworkError error, const QString &errorString);
  #ifndef QT_NO_SSL
      void replyEncrypted();
      void replySslErrors(const QList<QSslError> &, bool *, QList<QSslError> *);
      void replySslConfigurationChanged(const QSslConfiguration&);
      void replyPreSharedKeyAuthenticationRequiredSlot(QSslPreSharedKeyAuthenticator *);
  #endif
  #ifndef QT_NO_NETWORKPROXY
      void proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *auth);
  #endif
  
      // From QNonContiguousByteDeviceThreadForwardImpl in HTTP thread:
      void resetUploadDataSlot(bool *r);
      void wantUploadDataSlot(qint64);
      void sentUploadDataSlot(qint64, qint64);
  
      // From user's QNonContiguousByteDevice
      void uploadByteDeviceReadyReadSlot();
  
      Q_DECLARE_PUBLIC(QNetworkReplyHttpImpl)
  };
  
  QT_END_NAMESPACE
  
  #endif // QT_NO_HTTP
  
  #endif
  