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NOISSUE fix bad redirect URLs provided by the curse CDN

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MultiMC now parses the HTTP Location header in a (more) tolerant mode.
This commit is contained in:
Petr Mrázek
2018-01-21 03:49:54 +01:00
parent 0942867ecc
commit c33b4e252f
4 changed files with 50 additions and 4 deletions
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42
api/logic/net/Download.cpp
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@ -150,13 +150,50 @@ void Download::sslErrors(const QList<QSslError> & errors)
bool Download::handleRedirect()
{
QVariant redirect = m_reply->header(QNetworkRequest::LocationHeader);
QUrl redirect = m_reply->header(QNetworkRequest::LocationHeader).toUrl();
if(!redirect.isValid())
{
if(!m_reply->hasRawHeader("Location"))
{
// no redirect -> it's fine to continue
return false;
}
// there is a Location header, but it's not correct. we need to apply some workarounds...
QByteArray redirectBA = m_reply->rawHeader("Location");
if(redirectBA.size() == 0)
{
// empty, yet present redirect header? WTF?
return false;
}
QString redirectStr = QString::fromUtf8(redirectBA);
/*
* IF the URL begins with //, we need to insert the URL scheme.
* See: https://bugreports.qt-project.org/browse/QTBUG-41061
*/
if(redirectStr.startsWith("//"))
{
redirectStr = m_reply->url().scheme() + ":" + redirectStr;
}
/*
* Next, make sure the URL is parsed in tolerant mode. Qt doesn't parse the location header in tolerant mode, which causes issues.
* FIXME: report Qt bug for this
*/
redirect = QUrl(redirectStr, QUrl::TolerantMode);
qDebug() << "Fixed location header:" << redirect;
}
else
{
qDebug() << "Location header:" << redirect;
}
QString redirectURL;
if(redirect.isValid())
{
redirectURL = redirect.toString();
}
// FIXME: This is a hack for https://bugreports.qt-project.org/browse/QTBUG-41061
// FIXME: This is a hack for
else if(m_reply->hasRawHeader("Location"))
{
auto data = m_reply->rawHeader("Location");
@ -165,6 +202,7 @@ bool Download::handleRedirect()
redirectURL = m_reply->url().scheme() + ":" + data;
}
}
if (!redirectURL.isEmpty())
{
m_url = QUrl(redirect.toString());