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#include <QTcpServer>
#include <QTcpSocket>
#include <QByteArray>
#include <QString>
#include <QMap>
#include <QPair>
#include <QTimer>
#include <QStringList>
#include <QUrl>
#include <QDebug>
#include <QUrlQuery>
#include "katabasis/Globals.h"
#include "katabasis/ReplyServer.h"
namespace Katabasis {
ReplyServer::ReplyServer(QObject *parent): QTcpServer(parent),
timeout_(15), maxtries_(3), tries_(0) {
qDebug() << "O2ReplyServer: Starting";
connect(this, SIGNAL(newConnection()), this, SLOT(onIncomingConnection()));
replyContent_ = "<HTML></HTML>";
}
void ReplyServer::onIncomingConnection() {
qDebug() << "O2ReplyServer::onIncomingConnection: Receiving...";
QTcpSocket *socket = nextPendingConnection();
connect(socket, SIGNAL(readyRead()), this, SLOT(onBytesReady()), Qt::UniqueConnection);
connect(socket, SIGNAL(disconnected()), socket, SLOT(deleteLater()));
// Wait for a bit *after* first response, then close server if no useable data has arrived
// Helps with implicit flow, where a URL fragment may need processed by local user-agent and
// sent as secondary query string callback, or additional requests make it through first,
// like for favicons, etc., before such secondary callbacks are fired
QTimer *timer = new QTimer(socket);
timer->setObjectName("timeoutTimer");
connect(timer, SIGNAL(timeout()), this, SLOT(closeServer()));
timer->setSingleShot(true);
timer->setInterval(timeout() * 1000);
connect(socket, SIGNAL(readyRead()), timer, SLOT(start()));
}
void ReplyServer::onBytesReady() {
if (!isListening()) {
// server has been closed, stop processing queued connections
return;
}
qDebug() << "O2ReplyServer::onBytesReady: Processing request";
// NOTE: on first call, the timeout timer is started
QTcpSocket *socket = qobject_cast<QTcpSocket *>(sender());
if (!socket) {
qWarning() << "O2ReplyServer::onBytesReady: No socket available";
return;
}
QByteArray reply;
reply.append("HTTP/1.0 200 OK \r\n");
reply.append("Content-Type: text/html; charset=\"utf-8\"\r\n");
reply.append(QString("Content-Length: %1\r\n\r\n").arg(replyContent_.size()).toLatin1());
reply.append(replyContent_);
socket->write(reply);
qDebug() << "O2ReplyServer::onBytesReady: Sent reply";
QByteArray data = socket->readAll();
QMap<QString, QString> queryParams = parseQueryParams(&data);
if (queryParams.isEmpty()) {
if (tries_ < maxtries_ ) {
qDebug() << "O2ReplyServer::onBytesReady: No query params found, waiting for more callbacks";
++tries_;
return;
} else {
tries_ = 0;
qWarning() << "O2ReplyServer::onBytesReady: No query params found, maximum callbacks received";
closeServer(socket, false);
return;
}
}
if (!uniqueState_.isEmpty() && !queryParams.contains(QString(OAUTH2_STATE))) {
qDebug() << "O2ReplyServer::onBytesReady: Malicious or service request";
closeServer(socket, true);
return; // Malicious or service (e.g. favicon.ico) request
}
qDebug() << "O2ReplyServer::onBytesReady: Query params found, closing server";
closeServer(socket, true);
emit verificationReceived(queryParams);
}
QMap<QString, QString> ReplyServer::parseQueryParams(QByteArray *data) {
qDebug() << "O2ReplyServer::parseQueryParams";
//qDebug() << QString("O2ReplyServer::parseQueryParams data:\n%1").arg(QString(*data));
QString splitGetLine = QString(*data).split("\r\n").first();
splitGetLine.remove("GET ");
splitGetLine.remove("HTTP/1.1");
splitGetLine.remove("\r\n");
splitGetLine.prepend("http://localhost");
QUrl getTokenUrl(splitGetLine);
QList< QPair<QString, QString> > tokens;
QUrlQuery query(getTokenUrl);
tokens = query.queryItems();
QMap<QString, QString> queryParams;
QPair<QString, QString> tokenPair;
foreach (tokenPair, tokens) {
// FIXME: We are decoding key and value again. This helps with Google OAuth, but is it mandated by the standard?
QString key = QUrl::fromPercentEncoding(QByteArray().append(tokenPair.first.trimmed().toLatin1()));
QString value = QUrl::fromPercentEncoding(QByteArray().append(tokenPair.second.trimmed().toLatin1()));
queryParams.insert(key, value);
}
return queryParams;
}
void ReplyServer::closeServer(QTcpSocket *socket, bool hasparameters)
{
if (!isListening()) {
return;
}
qDebug() << "O2ReplyServer::closeServer: Initiating";
int port = serverPort();
if (!socket && sender()) {
QTimer *timer = qobject_cast<QTimer*>(sender());
if (timer) {
qWarning() << "O2ReplyServer::closeServer: Closing due to timeout";
timer->stop();
socket = qobject_cast<QTcpSocket *>(timer->parent());
timer->deleteLater();
}
}
if (socket) {
QTimer *timer = socket->findChild<QTimer*>("timeoutTimer");
if (timer) {
qDebug() << "O2ReplyServer::closeServer: Stopping socket's timeout timer";
timer->stop();
}
socket->disconnectFromHost();
}
close();
qDebug() << "O2ReplyServer::closeServer: Closed, no longer listening on port" << port;
emit serverClosed(hasparameters);
}
QByteArray ReplyServer::replyContent() {
return replyContent_;
}
void ReplyServer::setReplyContent(const QByteArray &value) {
replyContent_ = value;
}
int ReplyServer::timeout()
{
return timeout_;
}
void ReplyServer::setTimeout(int timeout)
{
timeout_ = timeout;
}
int ReplyServer::callbackTries()
{
return maxtries_;
}
void ReplyServer::setCallbackTries(int maxtries)
{
maxtries_ = maxtries;
}
QString ReplyServer::uniqueState()
{
return uniqueState_;
}
void ReplyServer::setUniqueState(const QString &state)
{
uniqueState_ = state;
}
}
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