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/*
* This file is part of smolbote. It's copyrighted by the contributors recorded
* in the version control history of the file, available from its original
* location: https://neueland.iserlohn-fortress.net/smolbote.hg
*
* SPDX-License-Identifier: GPL-3.0
*/
#include "urlinterceptor.h"
#include <QDir>
#include <QTextStream>
#include <QtConcurrent>
UrlRequestInterceptor::UrlRequestInterceptor(const QString &path, QObject *parent)
: QWebEngineUrlRequestInterceptor(parent)
{
QDir hostsD(path);
const QStringList hostFiles = hostsD.entryList(QDir::Files);
for(const QString &file : hostFiles) {
const QString absPath = hostsD.absoluteFilePath(file);
QtConcurrent::run([this, absPath]() {
auto r = parse(absPath);
#ifdef QT_DEBUG
qDebug("Parsed %i rules from %s", r.count(), qUtf8Printable(absPath));
#endif
rulesLock.lock();
for(const auto &k : r.keys()) {
if(rules.contains(k)) {
//
} else {
rules.insert(k, r.value(k));
}
}
rulesLock.unlock();
});
}
}
UrlRequestInterceptor::~UrlRequestInterceptor() = default;
void UrlRequestInterceptor::interceptRequest(QWebEngineUrlRequestInfo &info)
{
rulesLock.lock();
if(rules.contains(info.requestUrl().host())) {
info.block(rules.value(info.requestUrl().host()).isBlocking);
}
rulesLock.unlock();
}
QHash<QString, UrlRequestInterceptor::HostRule> parse(const QString &filename)
{
QHash<QString, UrlRequestInterceptor::HostRule> rules;
QFile hostfile(filename);
if(hostfile.open(QIODevice::ReadOnly | QIODevice::Text)) {
// with a QTextStream we can read lines without getting linebreaks at the end
QTextStream hostfile_stream(&hostfile);
while(!hostfile_stream.atEnd()) {
// read line and remove any whitespace at the end
const QString &line = hostfile_stream.readLine().trimmed();
// skip comments and empty lines
// everything else should be a rule
// format is <redirect> <host>
// 0.0.0.0 hostname
const QStringList &parts = line.split(' ');
const QString &redirect = parts.at(0);
for(const QString &host : parts.mid(1)) {
if(!rules.contains(host)) {
UrlRequestInterceptor::HostRule rule{};
rule.isBlocking = redirect == "0.0.0.0";
rules.insert(host, rule);
}
}
}
hostfile.close();
}
return rules;
};
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