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#include "iconv.hh"
#include "iframeschemehandler.hh"
#include <QWebEngineUrlRequestJob>
IframeSchemeHandler::IframeSchemeHandler( QObject * parent ):
QWebEngineUrlSchemeHandler( parent )
{
}
void IframeSchemeHandler::requestStarted( QWebEngineUrlRequestJob * requestJob )
{
QUrl url = requestJob->requestUrl();
// website dictionary iframe url
if ( url.scheme().startsWith( Config::WEBSITE_PROXY_PREFIX ) ) {
//"iframe-".length() == 7
url.setScheme( url.scheme().mid( 7 ) );
}
QNetworkRequest request;
request.setUrl( url );
request.setAttribute( QNetworkRequest::RedirectPolicyAttribute,
QNetworkRequest::RedirectPolicy::NoLessSafeRedirectPolicy );
QNetworkReply * reply = mgr.get( request );
auto finishAction = [ = ]() {
QByteArray contentType = "text/html";
QString codecName;
const auto ctHeader = reply->header( QNetworkRequest::ContentTypeHeader );
if ( ctHeader.isValid() ) {
contentType = ctHeader.toByteArray();
const auto ct = ctHeader.toString();
const auto index = ct.indexOf( "charset=" );
if ( index > -1 ) {
codecName = ct.mid( index + 8 );
}
}
auto buffer = new QBuffer( requestJob );
QByteArray replyData = reply->readAll();
QString articleString;
auto encoding = Iconv::findValidEncoding( { codecName } );
if ( !encoding.isEmpty() ) {
articleString = Iconv::toQString( encoding.toUtf8().constData(), replyData.data(), replyData.size() );
}
else {
articleString = QString::fromUtf8( replyData );
}
// Handle reply data
// 404 response may have response body.
if ( reply->error() != QNetworkReply::NoError && articleString.isEmpty() ) {
if ( reply->error() == QNetworkReply::ContentNotFoundError ) {
buffer->deleteLater();
//work around to fix QTBUG-106573
requestJob->redirect( url );
return;
}
QString emptyHtml = QString( "<html><body>%1</body></html>" ).arg( reply->errorString() );
buffer->setData( emptyHtml.toUtf8() );
requestJob->reply( contentType, buffer );
return;
}
// Change links from relative to absolute
QString root = reply->url().scheme() + "://" + reply->url().host();
if ( reply->url().port() != 80 && reply->url().port() != 443 && reply->url().port() != -1 ) {
root = root + ":" + QString::number( reply->url().port() );
}
QString base = root + reply->url().path();
QRegularExpression baseTag( R"EOF(<base\s+href=["'](.*?)["'].*?>)EOF",
QRegularExpression::CaseInsensitiveOption
| QRegularExpression::DotMatchesEverythingOption );
if ( const auto match = baseTag.match( articleString ); match.hasMatch() ) {
base = reply->url().resolved( QUrl( match.captured( 1 ) ) ).url();
}
QString baseTagHtml = QString( R"(<base href="%1">)" ).arg( base );
QString depressionFocus =
R"(<script type="application/javascript"> HTMLElement.prototype.focus=function(){console.log("focus() has been disabled.");}</script>
<script type="text/javascript" src="qrc:///scripts/iframeResizer.contentWindow.min.js">
</script><script type="text/javascript" src="qrc:///scripts/iframe-defer.js"></script>)";
articleString.remove( baseTag );
articleString.replace( "window.location", "window.location;_window_location" );
QRegularExpression headTag( R"(<head\b.*?>)",
QRegularExpression::CaseInsensitiveOption
| QRegularExpression::DotMatchesEverythingOption );
auto match = headTag.match( articleString );
if ( match.hasMatch() ) {
articleString.insert( match.capturedEnd(), baseTagHtml );
articleString.insert( match.capturedEnd(), depressionFocus );
}
else {
// the html contain no head element
// just insert at the beginning of the html ,and leave it at the mercy of browser(chrome webengine)
articleString.insert( 0, baseTagHtml );
articleString.insert( 0, depressionFocus );
}
buffer->setData( articleString.toUtf8() );
requestJob->reply( "text/html; charset=utf-8", buffer );
};
connect( reply, &QNetworkReply::finished, requestJob, finishAction );
connect( requestJob, &QObject::destroyed, reply, &QObject::deleteLater );
}
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