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// Copyright 2011-2021 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.
#include "WebFetch.h"
#include "NetworkConfig.h"
#include "Global.h"
#include <QtNetwork/QNetworkReply>
WebFetch::WebFetch(QString service, QUrl url, QObject *obj, const char *slot)
: QObject(), qoObject(obj), cpSlot(slot), m_service(service) {
url.setScheme(QLatin1String("https"));
if (!Global::get().s.qsServicePrefix.isEmpty()) {
url.setHost(prefixedServiceHost());
} else {
url.setHost(serviceHost());
}
qnr = Network::get(url);
connect(qnr, SIGNAL(finished()), this, SLOT(finished()));
connect(this, SIGNAL(fetched(QByteArray, QUrl, QMap< QString, QString >)), obj, slot);
}
QString WebFetch::prefixedServiceHost() const {
if (Global::get().s.qsServicePrefix.isEmpty()) {
return serviceHost();
}
return QString::fromLatin1("%1-%2.mumble.info").arg(Global::get().s.qsServicePrefix, m_service);
}
QString WebFetch::serviceHost() const {
return QString::fromLatin1("%1.mumble.info").arg(m_service);
}
static QString fromUtf8(const QByteArray &qba) {
if (qba.isEmpty())
return QString();
return QString::fromUtf8(qba.constData(), qba.length());
}
void WebFetch::finished() {
// Note that if this functions succeeds, it should deleteLater() itself, as this is a temporary object.
Q_ASSERT(qobject_cast< QNetworkReply * >(sender()) == qnr);
qnr->disconnect();
qnr->deleteLater();
QUrl url = qnr->request().url();
if (qnr->error() == QNetworkReply::NoError) {
QByteArray a = qnr->readAll();
// empty response is not an error
if (a.isNull())
a.append("");
QMap< QString, QString > headers;
foreach (const QByteArray &headerName, qnr->rawHeaderList()) {
QString name = fromUtf8(headerName);
QString value = fromUtf8(qnr->rawHeader(headerName));
if (!name.isEmpty() && !value.isEmpty()) {
headers.insert(name, value);
if (name == QLatin1String("Use-Service-Prefix")) {
QRegExp servicePrefixRegExp(QLatin1String("^[a-zA-Z]+$"));
if (servicePrefixRegExp.exactMatch(value)) {
Global::get().s.qsServicePrefix = value.toLower();
}
}
}
}
emit fetched(a, url, headers);
deleteLater();
} else if (url.host() == prefixedServiceHost() && url.host() != serviceHost()) {
// We have tried to fetch from a local service domain (e.Global::get(). de-update.mumble.info)
// which has failed, so naturally we want to try the non-local one (update.mumble.info)
// as well as maybe that one will work.
// This of course only makes sense, if prefixedServiceHost() and serviceHost() are in fact
// different hosts.
url.setHost(serviceHost());
qnr = Network::get(url);
connect(qnr, SIGNAL(finished()), this, SLOT(finished()));
} else {
emit fetched(QByteArray(), url, QMap< QString, QString >());
deleteLater();
}
}
/**
* @brief Fetch URL from mumble servers.
*
* If fetching fails, the slot is invoked with a null QByteArray.
* @param url URL to fetch. Hostname and scheme must be blank.
* @param obj Object to invoke slot on.
* @param slot Slot to be triggered, invoked with the signature of \link fetched.
*/
void WebFetch::fetch(const QString &service, const QUrl &url, QObject *obj, const char *slot) {
Q_ASSERT(!service.isEmpty());
Q_ASSERT(url.scheme().isEmpty());
Q_ASSERT(url.host().isEmpty());
Q_ASSERT(obj);
Q_ASSERT(slot);
new WebFetch(service, url, obj, slot);
}
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