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/*
Copyright (c) 2003 Malte Starostik <malte@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <cstdlib>
#include <ctime>
#include <dcopclient.h>
#include <kapplication.h>
#include <klocale.h>
#include <knotifyclient.h>
#include <kprotocolmanager.h>
#include "proxyscout.moc"
#include "discovery.h"
#include "script.h"
namespace KPAC
{
ProxyScout::QueuedRequest::QueuedRequest( const KURL& u )
: transaction( kapp->dcopClient()->beginTransaction() ),
url( u )
{
}
ProxyScout::ProxyScout( const TQCString& name )
: KDEDModule( name ),
m_instance( new TDEInstance( "proxyscout" ) ),
m_downloader( 0 ),
m_script( 0 ),
m_suspendTime( 0 )
{
}
ProxyScout::~ProxyScout()
{
delete m_script;
delete m_instance;
}
TQString ProxyScout::proxyForURL( const KURL& url )
{
if ( m_suspendTime )
{
if ( std::time( 0 ) - m_suspendTime < 300 ) return "DIRECT";
m_suspendTime = 0;
}
// Never use a proxy for the script itself
if ( m_downloader && url.equals( m_downloader->scriptURL(), true ) ) return "DIRECT";
if ( m_script ) return handleRequest( url );
if ( m_downloader || startDownload() )
{
m_requestQueue.append( url );
return TQString::null;
}
else return "DIRECT";
}
ASYNC ProxyScout::blackListProxy( const TQString& proxy )
{
m_blackList[ proxy ] = std::time( 0 );
}
ASYNC ProxyScout::reset()
{
delete m_script;
m_script = 0;
delete m_downloader;
m_downloader = 0;
m_blackList.clear();
m_suspendTime = 0;
KProtocolManager::reparseConfiguration();
}
bool ProxyScout::startDownload()
{
switch ( KProtocolManager::proxyType() )
{
case KProtocolManager::WPADProxy:
m_downloader = new Discovery( this );
break;
case KProtocolManager::PACProxy:
m_downloader = new Downloader( this );
m_downloader->download( KURL( KProtocolManager::proxyConfigScript() ) );
break;
default:
return false;
}
connect( m_downloader, TQT_SIGNAL( result( bool ) ),
TQT_SLOT( downloadResult( bool ) ) );
return true;
}
void ProxyScout::downloadResult( bool success )
{
KNotifyClient::Instance notifyInstance( m_instance );
if ( success )
try
{
m_script = new Script( m_downloader->script() );
}
catch ( const Script::Error& e )
{
KNotifyClient::event( "script-error", i18n(
"The proxy configuration script is invalid:\n%1" )
.arg( e.message() ) );
success = false;
}
else KNotifyClient::event( "download-error", m_downloader->error() );
for ( RequestQueue::ConstIterator it = m_requestQueue.begin();
it != m_requestQueue.end(); ++it )
{
TQCString type = TQSTRING_OBJECT_NAME_STRING;
TQByteArray data;
TQDataStream ds( data, IO_WriteOnly );
if ( success ) ds << handleRequest( ( *it ).url );
else ds << TQString( "DIRECT" );
kapp->dcopClient()->endTransaction( ( *it ).transaction, type, data );
}
m_requestQueue.clear();
m_downloader->deleteLater();
m_downloader = 0;
// Suppress further attempts for 5 minutes
if ( !success ) m_suspendTime = std::time( 0 );
}
TQString ProxyScout::handleRequest( const KURL& url )
{
try
{
TQString result = m_script->evaluate( url );
TQStringList proxies = TQStringList::split( ';', result );
for ( TQStringList::ConstIterator it = proxies.begin();
it != proxies.end(); ++it )
{
TQString proxy = ( *it ).stripWhiteSpace();
if ( proxy.left( 5 ) == "PROXY" )
{
KURL proxyURL( proxy = proxy.mid( 5 ).stripWhiteSpace() );
// If the URL is invalid or the URL is valid but in opaque
// format which indicates a port number being present in
// this particular case, simply calling setProtocol() on
// it trashes the whole URL.
int len = proxyURL.protocol().length();
if ( !proxyURL.isValid() || proxy.find( ":/", len ) != len )
proxy.prepend("http://");
BlackList::Iterator it = m_blackList.find( proxy );
if ( it == m_blackList.end() ) return proxy;
else if ( std::time( 0 ) - *it > 1800 ) // 30 minutes
{
// black listing expired
m_blackList.remove( it );
return proxy;
}
}
else return "DIRECT";
}
// FIXME: blacklist
}
catch ( const Script::Error& e )
{
KNotifyClient::Instance notifyInstance( m_instance );
KNotifyClient::event( "evaluation-error", i18n(
"The proxy configuration script returned an error:\n%1" )
.arg( e.message() ) );
}
return "DIRECT";
}
extern "C" KDE_EXPORT KDEDModule* create_proxyscout( const TQCString& name )
{
return new ProxyScout( name );
}
}
// vim: ts=4 sw=4 et
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