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tdelibs/tdecore/network/khttpproxysocketdevice.cpp

282 lines
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/* -*- C++ -*-
* Copyright (C) 2003 Thiago Macieira <thiago.macieira@kdemail.net>
*
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <tqsocketnotifier.h>
#include <tqcstring.h>
#include "kresolver.h"
#include "tdesocketaddress.h"
#include "tdesocketdevice.h"
#include "khttpproxysocketdevice.h"
using namespace KNetwork;
KResolverEntry KHttpProxySocketDevice::defaultProxy;
class KNetwork::KHttpProxySocketDevicePrivate
{
public:
KResolverEntry proxy;
TQCString request;
TQCString reply;
TDESocketAddress peer;
KHttpProxySocketDevicePrivate()
: proxy(KHttpProxySocketDevice::defaultProxy)
{ }
};
KHttpProxySocketDevice::KHttpProxySocketDevice(const TDESocketBase* parent)
: TDESocketDevice(parent), d(new KHttpProxySocketDevicePrivate)
{
}
KHttpProxySocketDevice::KHttpProxySocketDevice(const KResolverEntry& proxy)
: d(new KHttpProxySocketDevicePrivate)
{
d->proxy = proxy;
}
KHttpProxySocketDevice::~KHttpProxySocketDevice()
{
// nothing special to be done during closing
// TDESocketDevice::~TDESocketDevice closes the socket
delete d;
}
int KHttpProxySocketDevice::capabilities() const
{
return CanConnectString | CanNotBind | CanNotListen | CanNotUseDatagrams;
}
const KResolverEntry&
KHttpProxySocketDevice::proxyServer() const
{
return d->proxy;
}
void KHttpProxySocketDevice::setProxyServer(const KResolverEntry& proxy)
{
d->proxy = proxy;
}
void KHttpProxySocketDevice::close()
{
d->reply = d->request = TQCString();
d->peer = TDESocketAddress();
TDESocketDevice::close();
}
TDESocketAddress KHttpProxySocketDevice::peerAddress() const
{
if (isOpen())
return d->peer;
return TDESocketAddress();
}
TDESocketAddress KHttpProxySocketDevice::externalAddress() const
{
return TDESocketAddress();
}
bool KHttpProxySocketDevice::connect(const KResolverEntry& address)
{
if (d->proxy.family() == AF_UNSPEC)
// no proxy server set !
return TDESocketDevice::connect(address);
if (isOpen())
{
// socket is already open
resetError();
return true;
}
if (m_sockfd == -1)
// socket isn't created yet
return connect(address.address().nodeName(),
address.address().serviceName());
d->peer = address.address();
return parseServerReply();
}
bool KHttpProxySocketDevice::connect(const TQString& node, const TQString& service)
{
// same safety checks as above
if (m_sockfd == -1 && (d->proxy.family() == AF_UNSPEC ||
node.isEmpty() || service.isEmpty()))
{
// no proxy server set !
setError(IO_ConnectError, NotSupported);
return false;
}
if (isOpen())
{
// socket is already open
return true;
}
if (m_sockfd == -1)
{
// must create the socket
if (!TDESocketDevice::connect(d->proxy))
return false; // also unable to contact proxy server
setState(0); // unset open flag
// prepare the request
TQString request = TQString::fromLatin1("CONNECT %1:%2 HTTP/1.1\r\n"
"Cache-Control: no-cache\r\n"
"Host: \r\n"
"\r\n");
TQString node2 = node;
if (node.contains(':'))
node2 = '[' + node + ']';
d->request = TQString(request.arg(node2).arg(service)).latin1();
}
return parseServerReply();
}
bool KHttpProxySocketDevice::parseServerReply()
{
// make sure we're connected
if (!TDESocketDevice::connect(d->proxy))
if (error() == InProgress)
return true;
else if (error() != NoError)
return false;
if (!d->request.isEmpty())
{
// send request
TQ_LONG written = tqwriteBlock(d->request, d->request.length());
if (written < 0)
{
tqDebug("KHttpProxySocketDevice: would block writing request!");
if (error() == WouldBlock)
setError(IO_ConnectError, InProgress);
return error() == WouldBlock; // error
}
tqDebug("KHttpProxySocketDevice: request written");
d->request.remove(0, written);
if (!d->request.isEmpty())
{
setError(IO_ConnectError, InProgress);
return true; // still in progress
}
}
// request header is sent
// must parse reply, but must also be careful not to read too much
// from the buffer
int index;
if (!blocking())
{
TQ_LONG avail = bytesAvailable();
tqDebug("KHttpProxySocketDevice: %ld bytes available", avail);
setState(0);
if (avail == 0)
{
setError(IO_ConnectError, InProgress);
return true;
}
else if (avail < 0)
return false; // error!
TQByteArray buf(avail);
if (peekBlock(buf.data(), avail) < 0)
return false; // error!
TQCString fullHeaders = d->reply + buf.data();
// search for the end of the headers
index = fullHeaders.find("\r\n\r\n");
if (index == -1)
{
// no, headers not yet finished...
// consume data from socket
tqreadBlock(buf.data(), avail);
d->reply += buf.data();
setError(IO_ConnectError, InProgress);
return true;
}
// headers are finished
index -= d->reply.length();
d->reply += fullHeaders.mid(d->reply.length(), index + 4);
// consume from socket
tqreadBlock(buf.data(), index + 4);
}
else
{
int state = 0;
if (d->reply.right(3) == "\r\n\r")
state = 3;
else if (d->reply.right(2) == "\r\n")
state = 2;
else if (d->reply.right(1) == "\r")
state = 1;
while (state != 4)
{
char c = getch();
d->reply += c;
if ((state == 3 && c == '\n') ||
(state == 1 && c == '\n') ||
c == '\r')
++state;
else
state = 0;
}
}
// now really parse the reply
tqDebug("KHttpProxySocketDevice: get reply: %s\n",
d->reply.left(d->reply.find('\r')).data());
if (d->reply.left(7) != "HTTP/1." ||
(index = d->reply.find(' ')) == -1 ||
d->reply[index + 1] != '2')
{
setError(IO_ConnectError, NetFailure);
return false;
}
// we've got it
resetError();
setState(IO_Open);
return true;
}