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#include <QObject>
#include <QTimer>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QEventLoop>
#include "pref.h"
#include "helpers.h"
#include "checkcloudconnection.h"
CheckCloudConnection::CheckCloudConnection(QObject *parent) :
QObject(parent),
reply(0)
{
}
#define TEAPOT "/make-latte?number-of-shots=3"
#define HTTP_I_AM_A_TEAPOT 418
#define MILK "Linus does not like non-fat milk"
bool CheckCloudConnection::checkServer()
{
QTimer timer;
timer.setSingleShot(true);
QEventLoop loop;
QNetworkRequest request;
request.setRawHeader("Accept", "text/plain");
request.setRawHeader("User-Agent", getUserAgent().toUtf8());
request.setUrl(QString(prefs.cloud_base_url) + TEAPOT);
QNetworkAccessManager *mgr = new QNetworkAccessManager();
reply = mgr->get(request);
connect(&timer, SIGNAL(timeout()), &loop, SLOT(quit()));
connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
connect(reply, SIGNAL(sslErrors(QList<QSslError>)), this, SLOT(sslErrors(QList<QSslError>)));
timer.start(2000); // wait two seconds
loop.exec();
if (timer.isActive()) {
// didn't time out, did we get the right response?
timer.stop();
if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == HTTP_I_AM_A_TEAPOT &&
reply->readAll() == QByteArray(MILK)) {
reply->deleteLater();
mgr->deleteLater();
if (verbose > 1)
qWarning() << "Cloud storage: successfully checked connection to cloud server";
return true;
}
} else {
disconnect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
reply->abort();
}
if (verbose)
qDebug() << "connection test to cloud server failed" <<
reply->error() << reply->errorString() <<
reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() <<
reply->readAll();
reply->deleteLater();
mgr->deleteLater();
if (verbose)
qWarning() << "Cloud storage: unable to connect to cloud server";
return false;
}
void CheckCloudConnection::sslErrors(QList<QSslError> errorList)
{
if (verbose) {
qDebug() << "Received error response trying to set up https connection with cloud storage backend:";
Q_FOREACH (QSslError err, errorList) {
qDebug() << err.errorString();
}
}
QSslConfiguration conf = reply->sslConfiguration();
QSslCertificate cert = conf.peerCertificate();
QByteArray hexDigest = cert.digest().toHex();
if (reply->url().toString().contains(prefs.cloud_base_url) &&
hexDigest == "13ff44c62996cfa5cd69d6810675490e") {
if (verbose)
qDebug() << "Overriding SSL check as I recognize the certificate digest" << hexDigest;
reply->ignoreSslErrors();
} else {
if (verbose)
qDebug() << "got invalid SSL certificate with hex digest" << hexDigest;
}
}
// helper to be used from C code
extern "C" bool canReachCloudServer()
{
if (verbose)
qWarning() << "Cloud storage: checking connection to cloud server";
CheckCloudConnection *checker = new CheckCloudConnection;
return checker->checkServer();
}
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