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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include <cstddef>
#include <string_view>
#include <cppuhelper/supportsservice.hxx>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <o3tl/string_view.hxx>
#include <rtl/ustrbuf.hxx>
#include <sal/log.hxx>
#include "wininetbackend.hxx"
#if !defined WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#include <wininet.h>
#include <sal/alloca.h>
#define WININET_DLL_NAME L"wininet.dll"
#define EQUAL_SIGN '='
#define COLON ':'
#define SPACE ' '
#define SEMI_COLON ';'
namespace {
struct Library {
HMODULE module;
explicit Library(HMODULE theModule): module(theModule) {}
~Library() { if (module) FreeLibrary(module); }
};
struct ProxyEntry
{
OUString Server;
OUString Port;
};
ProxyEntry ReadProxyEntry(std::u16string_view aProxy, std::size_t& i)
{
ProxyEntry aProxyEntry;
aProxyEntry.Server = o3tl::getToken( aProxy, COLON, i );
if ( i != std::u16string_view::npos )
aProxyEntry.Port = o3tl::getToken( aProxy, COLON, i );
return aProxyEntry;
}
ProxyEntry FindProxyEntry(std::u16string_view aProxyList, std::u16string_view aType)
{
std::size_t nIndex = 0;
do
{
// get the next token, e.g. ftp=server:port
std::u16string_view nextToken = o3tl::getToken( aProxyList, SPACE, nIndex );
// split the next token again into the parts separated
// through '=', e.g. ftp=server:port -> ftp and server:port
std::size_t i = 0;
if( nextToken.find( EQUAL_SIGN ) != std::u16string_view::npos )
{
if( aType == o3tl::getToken( nextToken, EQUAL_SIGN, i ) )
return ReadProxyEntry(nextToken, i);
}
else if( aType.empty())
return ReadProxyEntry(nextToken, i);
} while ( nIndex != std::u16string_view::npos );
return ProxyEntry();
}
} // unnamed namespace
WinInetBackend::WinInetBackend()
{
Library hWinInetDll( LoadLibraryW( WININET_DLL_NAME ) );
if( hWinInetDll.module )
{
typedef BOOL ( WINAPI *InternetQueryOption_Proc_T )( HINTERNET, DWORD, LPVOID, LPDWORD );
InternetQueryOption_Proc_T lpfnInternetQueryOption =
reinterpret_cast< InternetQueryOption_Proc_T >(
GetProcAddress( hWinInetDll.module, "InternetQueryOptionW" ) );
if (lpfnInternetQueryOption)
{
// Some Windows versions would fail the InternetQueryOption call
// with ERROR_OUTOFMEMORY when the initial dwLength were zero (and
// are apparently fine with the initial sizeof (INTERNET_PROXY_INFO)
// and need no reallocation), while other versions fail with
// ERROR_INSUFFICIENT_BUFFER upon that initial dwLength and need a
// reallocation:
INTERNET_PROXY_INFO pi;
LPINTERNET_PROXY_INFO lpi = π
DWORD dwLength = sizeof (pi);
bool ok = lpfnInternetQueryOption(
nullptr,
INTERNET_OPTION_PROXY,
lpi,
&dwLength );
if (!ok)
{
DWORD err = GetLastError();
if (err == ERROR_INSUFFICIENT_BUFFER)
{
// allocate sufficient space on the stack
// insufficient space on the stack results
// in a stack overflow exception, we assume
// this never happens, because of the relatively
// small amount of memory we need
// alloca is nice because it is fast and we don't
// have to free the allocated memory, it will be
// automatically done
lpi = static_cast< LPINTERNET_PROXY_INFO >(
alloca( dwLength ) );
ok = lpfnInternetQueryOption(
nullptr,
INTERNET_OPTION_PROXY,
lpi,
&dwLength );
if (!ok)
{
err = GetLastError();
}
}
if (!ok)
{
SAL_WARN(
"shell",
"InternetQueryOption INTERNET_OPTION_PROXY"
" GetLastError=" << err);
return;
}
}
// if a proxy is disabled, InternetQueryOption returns
// an empty proxy list, so we don't have to check if
// proxy is enabled or not
// We use InternetQueryOptionW (see https://msdn.microsoft.com/en-us/library/aa385101);
// it fills INTERNET_PROXY_INFO struct which is defined in WinInet.h to have LPCTSTR
// (i.e., the UNICODE-dependent generic string type expanding to const wchar_t* when
// UNICODE is defined, and InternetQueryOption macro expands to InternetQueryOptionW).
// Thus, it's natural to expect that W version would return wide strings. But it's not
// true. The W version still returns const char* in INTERNET_PROXY_INFO.
OUString aProxyList = OUString::createFromAscii( lpi->lpszProxy );
OUString aProxyBypassList = OUString::createFromAscii( lpi->lpszProxyBypass );
// override default for ProxyType, which is "0" meaning "No proxies".
valueProxyType_.IsPresent = true;
valueProxyType_.Value <<= sal_Int32(1);
// fill proxy bypass list
if( aProxyBypassList.getLength() > 0 )
{
OUStringBuffer aReverseList;
sal_Int32 nIndex = 0;
do
{
OUString aToken = aProxyBypassList.getToken( 0, SPACE, nIndex );
if ( aProxyList.indexOf( aToken ) == -1 )
{
if ( aReverseList.getLength() )
{
aReverseList.insert( 0, sal_Unicode( SEMI_COLON ) );
aReverseList.insert( 0, aToken );
}
else
aReverseList = aToken;
}
}
while ( nIndex >= 0 );
aProxyBypassList = aReverseList.makeStringAndClear();
valueNoProxy_.IsPresent = true;
valueNoProxy_.Value <<= aProxyBypassList.replace( SPACE, SEMI_COLON );
}
if( aProxyList.getLength() > 0 )
{
// this implementation follows the algorithm
// of the internet explorer
// if there are type-dependent proxy settings
// and type independent proxy settings in the
// registry the internet explorer chooses the
// type independent proxy for all settings
// e.g. imagine the following registry entry
// ftp=server:port;http=server:port;server:port
// the last token server:port is type independent
// so the ie chooses this proxy server
// if there is no port specified for a type independent
// server the ie uses the port of an http server if
// there is one and it has a port
ProxyEntry aTypeIndepProxy = FindProxyEntry( aProxyList, u"");
ProxyEntry aHttpProxy = FindProxyEntry( aProxyList, u"http" );
ProxyEntry aHttpsProxy = FindProxyEntry( aProxyList, u"https" );
if( aTypeIndepProxy.Server.getLength() )
{
aHttpProxy.Server = aTypeIndepProxy.Server;
aHttpsProxy.Server = aTypeIndepProxy.Server;
if( aTypeIndepProxy.Port.getLength() )
{
aHttpProxy.Port = aTypeIndepProxy.Port;
aHttpsProxy.Port = aTypeIndepProxy.Port;
}
else
{
aHttpsProxy.Port = aHttpProxy.Port;
}
}
// http proxy name
if( aHttpProxy.Server.getLength() > 0 )
{
valueHttpProxyName_.IsPresent = true;
valueHttpProxyName_.Value <<= aHttpProxy.Server;
}
// http proxy port
if( aHttpProxy.Port.getLength() > 0 )
{
valueHttpProxyPort_.IsPresent = true;
valueHttpProxyPort_.Value <<= aHttpProxy.Port.toInt32();
}
// https proxy name
if( aHttpsProxy.Server.getLength() > 0 )
{
valueHttpsProxyName_.IsPresent = true;
valueHttpsProxyName_.Value <<= aHttpsProxy.Server;
}
// https proxy port
if( aHttpsProxy.Port.getLength() > 0 )
{
valueHttpsProxyPort_.IsPresent = true;
valueHttpsProxyPort_.Value <<= aHttpsProxy.Port.toInt32();
}
}
}
}
}
WinInetBackend::~WinInetBackend()
{
}
void WinInetBackend::setPropertyValue(
OUString const &, css::uno::Any const &)
{
throw css::lang::IllegalArgumentException(
"setPropertyValue not supported",
getXWeak(), -1);
}
css::uno::Any WinInetBackend::getPropertyValue(
OUString const & PropertyName)
{
if (PropertyName == "ooInetHTTPProxyName")
{
return css::uno::Any(valueHttpProxyName_);
} else if ( PropertyName == "ooInetHTTPProxyPort" )
{
return css::uno::Any(valueHttpProxyPort_);
} else if ( PropertyName == "ooInetHTTPSProxyName" )
{
return css::uno::Any(valueHttpsProxyName_);
} else if ( PropertyName == "ooInetHTTPSProxyPort" )
{
return css::uno::Any(valueHttpsProxyPort_);
} else if ( PropertyName == "ooInetNoProxy" )
{
return css::uno::Any(valueNoProxy_);
} else if ( PropertyName == "ooInetProxyType" )
{
return css::uno::Any(valueProxyType_);
} else {
throw css::beans::UnknownPropertyException(
PropertyName, getXWeak());
}
}
OUString SAL_CALL WinInetBackend::getImplementationName()
{
return "com.sun.star.comp.configuration.backend.WinInetBackend" ;
}
sal_Bool SAL_CALL WinInetBackend::supportsService(const OUString& aServiceName)
{
return cppu::supportsService(this, aServiceName);
}
uno::Sequence<OUString> SAL_CALL WinInetBackend::getSupportedServiceNames()
{
return { "com.sun.star.configuration.backend.WinInetBackend" };
}
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
shell_WinInetBackend_get_implementation(
css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
{
return cppu::acquire(new WinInetBackend);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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