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httpfilter.h

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00001 /*
00002    This file is part of the KDE libraries
00003    Copyright (c) 2002 Waldo Bastian <bastian@kde.org>
00004    Copyright 2009 David Faure <faure@kde.org>
00005 
00006    This library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Library General Public
00008    License version 2 as published by the Free Software Foundation.
00009 
00010    This library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Library General Public License for more details.
00014 
00015    You should have received a copy of the GNU Library General Public License
00016    along with this library; see the file COPYING.LIB.  If not, write to
00017    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018    Boston, MA 02110-1301, USA.
00019 */
00020 
00021 #ifndef _HTTPFILTER_H_
00022 #define _HTTPFILTER_H_
00023 
00024 #include <config.h>
00025 
00026 class KGzipFilter;
00027 #include <QBuffer>
00028 
00029 #include <QObject>
00030 #include <kcodecs.h>
00031 
00032 class HTTPFilterBase : public QObject
00033 {
00034     Q_OBJECT
00035 public:
00036     HTTPFilterBase();
00037     ~HTTPFilterBase();
00038 
00039     void chain(HTTPFilterBase *previous);
00040 
00041 public Q_SLOTS:
00042     virtual void slotInput(const QByteArray &d) = 0;
00043 
00044 Q_SIGNALS:
00045     void output(const QByteArray &d);
00046     void error(const QString &);
00047 
00048 protected:
00049     HTTPFilterBase *last;
00050 };
00051 
00052 class HTTPFilterChain : public HTTPFilterBase
00053 {
00054     Q_OBJECT
00055 public:
00056     HTTPFilterChain();
00057 
00058     void addFilter(HTTPFilterBase *filter);
00059 
00060 public Q_SLOTS:
00061     void slotInput(const QByteArray &d);
00062 
00063 private:
00064     HTTPFilterBase *first;
00065 };
00066 
00067 class HTTPFilterMD5 : public HTTPFilterBase
00068 {
00069     Q_OBJECT
00070 public:
00071     HTTPFilterMD5();
00072 
00073     QString md5();
00074 
00075 public Q_SLOTS:
00076     void slotInput(const QByteArray &d);
00077 
00078 private:
00079     KMD5 context;
00080 };
00081 
00082 
00083 class HTTPFilterGZip : public HTTPFilterBase
00084 {
00085     Q_OBJECT
00086 public:
00087     HTTPFilterGZip(bool deflate = false /* for subclass HTTPFilterDeflate */ );
00088     ~HTTPFilterGZip();
00089 
00090 public Q_SLOTS:
00091     void slotInput(const QByteArray &d);
00092 
00093 private:
00094     bool m_deflateMode;
00095     bool m_firstData;
00096     bool m_finished;
00097     KGzipFilter* m_gzipFilter;
00098 };
00099 
00100 class HTTPFilterDeflate : public HTTPFilterGZip
00101 {
00102     Q_OBJECT
00103 public:
00104     HTTPFilterDeflate();
00105 };
00106 
00107 #endif

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