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/*
* Copyright (c) 2009, Zsombor Gegesy <gzsombor@gmail.com>
* Copyright (c) 2009, Benjamin C. Meyer <ben@meyerhome.net>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Benjamin Meyer nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* ============================================================
*
* This file is a part of the rekonq project
*
* Copyright (C) 2009 by Andrea Diamantini <adjam7 at gmail dot com>
*
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* ============================================================ */
#include "adblockrule.h"
#include <QDebug>
#include <QRegExp>
#include <QUrl>
AdBlockRule::AdBlockRule(const QString &filter)
: m_cssRule(false)
, m_exceptionRule(false)
, m_enabledRule(true)
{
bool isRegExpRule = false;
if (filter.startsWith(QLatin1String("!")) || filter.trimmed().isEmpty())
m_enabledRule = false;
if (filter.contains(QLatin1String("##")))
m_cssRule = true;
QString parsedLine = filter;
if (parsedLine.startsWith(QLatin1String("@@")))
{
m_exceptionRule = true;
parsedLine = parsedLine.mid(2);
}
if (parsedLine.startsWith(QLatin1Char('/')))
{
if (parsedLine.endsWith(QLatin1Char('/')))
{
parsedLine = parsedLine.mid(1);
parsedLine = parsedLine.left(parsedLine.size() - 1);
isRegExpRule = true;
}
}
int options = parsedLine.indexOf(QLatin1String("$"), 0);
if (options >= 0)
{
m_options = parsedLine.mid(options + 1).split(QLatin1Char(','));
parsedLine = parsedLine.left(options);
}
if(!isRegExpRule)
parsedLine = convertPatternToRegExp(parsedLine);
m_regExp = QRegExp(parsedLine, Qt::CaseInsensitive, QRegExp::RegExp2);
if (m_options.contains(QLatin1String("match-case")))
{
m_regExp.setCaseSensitivity(Qt::CaseSensitive);
m_options.removeOne(QLatin1String("match-case"));
}
}
// here return false means that rule doesn't match,
// so that url is allowed
// return true means "matched rule", so stop url!
bool AdBlockRule::match(const QString &encodedUrl) const
{
if (m_cssRule)
return false;
if (!m_enabledRule)
return false;
bool matched = m_regExp.indexIn(encodedUrl) != -1;
if (matched && !m_options.isEmpty())
{
// we only support domain right now
if (m_options.count() == 1)
{
foreach (const QString &option, m_options)
{
if (option.startsWith(QLatin1String("domain=")))
{
QUrl url = QUrl::fromEncoded(encodedUrl.toUtf8());
QString host = url.host();
QStringList domainOptions = option.mid(7).split(QLatin1Char('|'));
foreach (QString domainOption, domainOptions)
{
bool negate = domainOption.at(0) == QLatin1Char('~');
if (negate)
domainOption = domainOption.mid(1);
bool hostMatched = domainOption == host;
if (hostMatched && !negate)
return true;
if (!hostMatched && negate)
return true;
}
}
}
}
return false;
}
return matched;
}
QString AdBlockRule::convertPatternToRegExp(const QString &wildcardPattern)
{
QString pattern = wildcardPattern;
return pattern.replace(QRegExp(QLatin1String("\\*+")), QLatin1String("*")) // remove multiple wildcards
.replace(QRegExp(QLatin1String("\\^\\|$")), QLatin1String("^")) // remove anchors following separator placeholder
.replace(QRegExp(QLatin1String("^(\\*)")), QLatin1String("")) // remove leading wildcards
.replace(QRegExp(QLatin1String("(\\*)$")), QLatin1String("")) // remove trailing wildcards
.replace(QRegExp(QLatin1String("(\\W)")), QLatin1String("\\\\1")) // escape special symbols
.replace(QRegExp(QLatin1String("^\\\\\\|\\\\\\|")),
QLatin1String("^[\\w\\-]+:\\/+(?!\\/)(?:[^\\/]+\\.)?")) // process extended anchor at expression start
.replace(QRegExp(QLatin1String("\\\\\\^")),
QLatin1String("(?:[^\\w\\d\\-.%]|$)")) // process separator placeholders
.replace(QRegExp(QLatin1String("^\\\\\\|")), QLatin1String("^")) // process anchor at expression start
.replace(QRegExp(QLatin1String("\\\\\\|$")), QLatin1String("$")) // process anchor at expression end
.replace(QRegExp(QLatin1String("\\\\\\*")), QLatin1String(".*")) // replace wildcards by .*
;
}
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