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# khttpproxysocketdevice.cpp

    00001 /*  -*- C++ -*-
    00002  *  Copyright (C) 2003 Thiago Macieira <thiago.macieira@kdemail.net>
    00003  *
    00004  *
    00005  *  Permission is hereby granted, free of charge, to any person obtaining
    00006  *  a copy of this software and associated documentation files (the
    00007  *  "Software"), to deal in the Software without restriction, including
    00008  *  without limitation the rights to use, copy, modify, merge, publish,
    00009  *  distribute, sublicense, and/or sell copies of the Software, and to
    00010  *  permit persons to whom the Software is furnished to do so, subject to
    00011  *  the following conditions:
    00012  *
    00013  *  The above copyright notice and this permission notice shall be included
    00014  *  in all copies or substantial portions of the Software.
    00015  *
    00016  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    00017  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    00018  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    00019  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    00020  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    00021  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    00022  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    00023  */
    00024
    00025 #include <config.h>
    00026
    00027 #include <sys/types.h>
    00028 #include <sys/socket.h>
    00029
    00030 #include <qsocketnotifier.h>
    00031 #include <qcstring.h>
    00032
    00033 #include "kresolver.h"
    00034 #include "ksocketaddress.h"
    00035 #include "ksocketdevice.h"
    00036 #include "khttpproxysocketdevice.h"
    00037
    00038 using namespace KNetwork;
    00039
    00040 KResolverEntry KHttpProxySocketDevice::defaultProxy;
    00041
    00042 class KNetwork::KHttpProxySocketDevicePrivate
    00043 {
    00044 public:
    00045   KResolverEntry proxy;
    00046   QCString request;
    00047   QCString reply;
    00048   KSocketAddress peer;
    00049
    00050   KHttpProxySocketDevicePrivate()
    00051     : proxy(KHttpProxySocketDevice::defaultProxy)
    00052   { }
    00053 };
    00054
    00055 KHttpProxySocketDevice::KHttpProxySocketDevice(const KSocketBase* parent)
    00056   : KSocketDevice(parent), d(new KHttpProxySocketDevicePrivate)
    00057 {
    00058 }
    00059
    00060 KHttpProxySocketDevice::KHttpProxySocketDevice(const KResolverEntry& proxy)
    00061   : d(new KHttpProxySocketDevicePrivate)
    00062 {
    00063   d->proxy = proxy;
    00064 }
    00065
    00066 KHttpProxySocketDevice::~KHttpProxySocketDevice()
    00067 {
    00068   // nothing special to be done during closing
    00069   // KSocketDevice::~KSocketDevice closes the socket
    00070
    00071   delete d;
    00072 }
    00073
    00074 int KHttpProxySocketDevice::capabilities() const
    00075 {
    00076   return CanConnectString | CanNotBind | CanNotListen | CanNotUseDatagrams;
    00077 }
    00078
    00079 const KResolverEntry&
    00080 KHttpProxySocketDevice::proxyServer() const
    00081 {
    00082   return d->proxy;
    00083 }
    00084
    00085 void KHttpProxySocketDevice::setProxyServer(const KResolverEntry& proxy)
    00086 {
    00087   d->proxy = proxy;
    00088 }
    00089
    00090 void KHttpProxySocketDevice::close()
    00091 {
    00092   d->reply = d->request = QCString();
    00093   d->peer = KSocketAddress();
    00094   KSocketDevice::close();
    00095 }
    00096
    00097 KSocketAddress KHttpProxySocketDevice::peerAddress() const
    00098 {
    00099   if (isOpen())
    00100     return d->peer;
    00101   return KSocketAddress();
    00102 }
    00103
    00104 KSocketAddress KHttpProxySocketDevice::externalAddress() const
    00105 {
    00106   return KSocketAddress();
    00107 }
    00108
    00109 bool KHttpProxySocketDevice::connect(const KResolverEntry& address)
    00110 {
    00111   if (d->proxy.family() == AF_UNSPEC)
    00112     // no proxy server set !
    00113     return KSocketDevice::connect(address);
    00114
    00115   if (isOpen())
    00116     {
    00117       // socket is already open
    00118       resetError();
    00119       return true;
    00120     }
    00121
    00122   if (m_sockfd == -1)
    00123     // socket isn't created yet
    00124     return connect(address.address().nodeName(),
    00125            address.address().serviceName());
    00126
    00127   d->peer = address.address();
    00128   return parseServerReply();
    00129 }
    00130
    00131 bool KHttpProxySocketDevice::connect(const QString& node, const QString& service)
    00132 {
    00133   // same safety checks as above
    00134   if (m_sockfd == -1 && (d->proxy.family() == AF_UNSPEC ||
    00135              node.isEmpty() || service.isEmpty()))
    00136     {
    00137       // no proxy server set !
    00138       setError(IO_ConnectError, NotSupported);
    00139       return false;
    00140     }
    00141
    00142   if (isOpen())
    00143     {
    00144       // socket is already open
    00145       return true;
    00146     }
    00147
    00148   if (m_sockfd == -1)
    00149     {
    00150       // must create the socket
    00151       if (!KSocketDevice::connect(d->proxy))
    00152     return false;       // also unable to contact proxy server
    00153       setState(0);      // unset open flag
    00154
    00155       // prepare the request
    00156       QString request = QString::fromLatin1("CONNECT %1:%2 HTTP/1.1\r\n"
    00157                         "Cache-Control: no-cache\r\n"
    00158                         "Host: \r\n"
    00159                         "\r\n");
    00160       QString node2 = node;
    00161       if (node.contains(':'))
    00162     node2 = '[' + node + ']';
    00163
    00164       d->request = request.arg(node2).arg(service).latin1();
    00165     }
    00166
    00167   return parseServerReply();
    00168 }
    00169
    00170 bool KHttpProxySocketDevice::parseServerReply()
    00171 {
    00172   // make sure we're connected
    00173   if (!KSocketDevice::connect(d->proxy))
    00174     if (error() == InProgress)
    00175       return true;
    00176     else if (error() != NoError)
    00177       return false;
    00178
    00179   if (!d->request.isEmpty())
    00180     {
    00181       // send request
    00182       Q_LONG written = writeBlock(d->request, d->request.length());
    00183       if (written < 0)
    00184     {
    00185       qDebug("KHttpProxySocketDevice: would block writing request!");
    00186       if (error() == WouldBlock)
    00187         setError(IO_ConnectError, InProgress);
    00188       return error() == WouldBlock; // error
    00189     }
    00190       qDebug("KHttpProxySocketDevice: request written");
    00191
    00192       d->request.remove(0, written);
    00193
    00194       if (!d->request.isEmpty())
    00195     {
    00196       setError(IO_ConnectError, InProgress);
    00197       return true;      // still in progress
    00198     }
    00199     }
    00200
    00201   // request header is sent
    00202   // must parse reply, but must also be careful not to read too much
    00203   // from the buffer
    00204
    00205   int index;
    00206   if (!blocking())
    00207     {
    00208       Q_LONG avail = bytesAvailable();
    00209       qDebug("KHttpProxySocketDevice: %ld bytes available", avail);
    00210       setState(0);
    00211       if (avail == 0)
    00212     {
    00213       setError(IO_ConnectError, InProgress);
    00214       return true;
    00215     }
    00216       else if (avail < 0)
    00217     return false;       // error!
    00218
    00219       QByteArray buf(avail);
    00220       if (peekBlock(buf.data(), avail) < 0)
    00221     return false;       // error!
    00222
    00223       QCString fullHeaders = d->reply + buf.data();
    00224       // search for the end of the headers
    00225       index = fullHeaders.find("\r\n\r\n");
    00226       if (index == -1)
    00227     {
    00228       // no, headers not yet finished...
    00229       // consume data from socket
    00230       readBlock(buf.data(), avail);
    00231       d->reply += buf.data();
    00232       setError(IO_ConnectError, InProgress);
    00233       return true;
    00234     }
    00235
    00236       // headers are finished
    00237       index -= d->reply.length();
    00238       d->reply += fullHeaders.mid(d->reply.length(), index + 4);
    00239
    00240       // consume from socket
    00241       readBlock(buf.data(), index + 4);
    00242     }
    00243   else
    00244     {
    00245       int state = 0;
    00246       if (d->reply.right(3) == "\r\n\r")
    00247     state = 3;
    00248       else if (d->reply.right(2) == "\r\n")
    00249     state = 2;
    00250       else if (d->reply.right(1) == "\r")
    00251     state = 1;
    00252       while (state != 4)
    00253     {
    00254       char c = getch();
    00255       d->reply += c;
    00256
    00257       if ((state == 3 && c == '\n') ||
    00258           (state == 1 && c == '\n') ||
    00259           c == '\r')
    00260         ++state;
    00261       else
    00262         state = 0;
    00263     }
    00264     }
    00265
    00266   // now really parse the reply
    00267   qDebug("KHttpProxySocketDevice: get reply: %s\n",
    00268      d->reply.left(d->reply.find('\r')).data());
    00269   if (d->reply.left(7) != "HTTP/1." ||
    00270       (index = d->reply.find(' ')) == -1 ||
    00271       d->reply[index + 1] != '2')
    00272     {
    00273       setError(IO_ConnectError, NetFailure);
    00274       return false;
    00275     }
    00276
    00277   // we've got it
    00278   resetError();
    00279   setState(IO_Open);
    00280   return true;
    00281 }

This file is part of the documentation for kdecore Library Version 3.4.1.
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