1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
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 QCString& name )
: KDEDModule( name ),
m_instance( new KInstance( "proxyscout" ) ),
m_downloader( 0 ),
m_script( 0 ),
m_suspendTime( 0 )
{
}
ProxyScout::~ProxyScout()
{
delete m_script;
delete m_instance;
}
QString 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 QString::null;
}
else return "DIRECT";
}
ASYNC ProxyScout::blackListProxy( const QString& 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, SIGNAL( result( bool ) ),
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 )
{
QCString type = "QString";
QByteArray data;
QDataStream ds( data, IO_WriteOnly );
if ( success ) ds << handleRequest( ( *it ).url );
else ds << QString( "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 );
}
QString ProxyScout::handleRequest( const KURL& url )
{
try
{
QString result = m_script->evaluate( url );
QStringList proxies = QStringList::split( ';', result );
for ( QStringList::ConstIterator it = proxies.begin();
it != proxies.end(); ++it )
{
QString 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 QCString& name )
{
return new ProxyScout( name );
}
}
// vim: ts=4 sw=4 et
|
