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QtStompClient.cpp
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QtStompClient.cpp
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#include "QtStompClient.h"
using namespace std;
QTWebStompClient::QTWebStompClient(const char* url, const char* login, const char* passcode, const char* vHost, bool debug, QObject *parent)
{
m_url = QUrl(url);
m_debug = debug;
m_login = login;
m_passcode = passcode;
if (m_debug) {
qDebug() << "Connecting to WebSocket server:" << url;
}
m_vHost = vHost;
connect(&m_webSocket, &QWebSocket::connected, this, &QTWebStompClient::onConnected);
connect(&m_webSocket, (&QWebSocket::sslErrors), this, &QTWebStompClient::onSslErrors);
connect(&m_webSocket, &QWebSocket::disconnected, this, &QTWebStompClient::closed);
}
void QTWebStompClient::openConnection()
{
m_webSocket.open(m_url);
}
void QTWebStompClient::onConnected()
{
if (m_debug) {
qDebug() << "-----------------------" << Qt::endl << "Connected to Websocket!" << Qt::endl << "-----------------------" << Qt::endl;
}
connect(&m_webSocket, &QWebSocket::textMessageReceived, this, &QTWebStompClient::onTextMessageReceived);
m_connectionState = Connecting;
QString connectFrame = "CONNECT\u000A{vHost}accept-version:1.2\u000Alogin:{Login}\u000Apasscode:{Passcode}\u000A\u000A\u0000";
connectFrame.replace("{Login}", m_login);
connectFrame.replace("{Passcode}", m_passcode);
QString vHost = "";
if (m_vHost) {
vHost = "vHost:" + QString(m_vHost) + QString("\u000A");
}
connectFrame.replace("{vHost}", vHost);
QString connectFrameMessageWithNullFix = QString(connectFrame.data(), connectFrame.size() + 1); // solves the null-terminator issue
m_webSocket.sendTextMessage(connectFrameMessageWithNullFix);
if (m_debug) {
qDebug() << "Sent message" << connectFrameMessageWithNullFix;
}
}
void QTWebStompClient::onTextMessageReceived(QString message)
{
StompMessage stompMessage(message.toStdString().c_str());
switch (m_connectionState) {
case Connecting:
if (m_debug) {
qDebug() << "Connection response: " << stompMessage.toString().c_str();
}
if (stompMessage.m_messageType == "CONNECTED")
{
if (m_debug) {
qDebug() << "--------------------" << Qt::endl << "Connected to STOMP!" << Qt::endl << "--------------------" << Qt::endl;
}
m_connectionState = Connected;
emit connectedMessage(message);
}
else
{
if (m_debug)
{
qDebug() << "Message type CONNECTED expected, got " << stompMessage.m_messageType.c_str();
}
emit submitError(QString("Message type CONNECTED expected, got %1").arg(QString::fromStdString(stompMessage.toString())));
}
break;
case Subscribed:
// TODO: Improve check, maybe different messages are allowed when subscribed
if (stompMessage.m_messageType == "MESSAGE") {
if (m_debug) {
qDebug() << "Message received from queue!" << Qt::endl << stompMessage.toString().c_str();
}
emit subscribedMessage(message);
}
else {
emit submitError(QString("Message type MESSAGE expected, got %1. Message is : %2").arg(QString::fromStdString(stompMessage.m_messageType), QString::fromStdString(stompMessage.toString())));
}
break;
default:
emit submitError("Unsupported connection state");
break;
}
}
// TODO: Change to have multiple ids (so we can handle more than one subscription)
void QTWebStompClient::Subscribe(const char* queueName, /*void(*onMessageCallback)(const StompMessage &s), */QTWebStompClient::AckMode ackMode)
{
if (m_connectionState != Connected)
{
// For now, if you need to subscribe to 2 queues, you can create two instances of the client. Later an improvement would be to use the id variables of the underlying websocket lib.
throw runtime_error("Cannot subscribe when connection hasn't finished or when already subscribed. Try using the callback function for onConnect to subscribe");
}
map<string, string> headers;
headers["id"] = "0";
headers["destination"] = std::string(queueName);
switch (ackMode) {
case Client:
headers["ack"] = "client";
break;
case ClientIndividual:
headers["ack"] = "client-individual";
break;
default:
headers["ack"] = "auto";
break;
}
StompMessage myMessage("SUBSCRIBE", headers, "");
auto subscribeMessage = QString(myMessage.toString().c_str());
QString subscribeFrame = QString(subscribeMessage.data(), subscribeMessage.size() + 1);
m_webSocket.sendTextMessage(subscribeFrame);
m_connectionState = Subscribed;
}
void QTWebStompClient::onSslErrors(const QList<QSslError> &errors)
{
emit submitError("SSL error! I'd show the error description if there were an easy way to convert from enum to string in c++. You'll have to debug.");
}
void QTWebStompClient::closed()
{
qDebug() << QDateTime::currentMSecsSinceEpoch() << "Connection closed =(";
emit isClosed();
}
void QTWebStompClient::Ack(const StompMessage & s)
{
auto ack = s.m_headers.at(std::string("ack"));
Ack(ack.c_str());
}
void QTWebStompClient::Ack(const char* id)
{
if (m_debug) {
qDebug() << "Acking message with id: " << id;
}
// Yes I know that this is disgusting
QString ackFrame("ACK\u000Aid:{{TheAckId}}\u000A\u000A\u000A\u0000");
ackFrame.replace("{{TheAckId}}", id);
QString ackFrameNullFixed(ackFrame.data(), ackFrame.size() + 1); // solves the null-terminator issue
m_webSocket.sendTextMessage(ackFrameNullFixed);
}
void QTWebStompClient::Send(const StompMessage & stompMessage)
{
if (m_debug) {
qDebug() << "Sending message: " << stompMessage.toString().c_str();
}
std::string sendFrame = std::string(stompMessage.m_messageType+"\u000A");
for (auto &header : stompMessage.m_headers)
{
sendFrame += header.first + ":" + header.second + "\u000A";
}
sendFrame += "\u000A" + stompMessage.m_message + "\u0000";
QString sendFrameTemp(sendFrame.c_str());
QString sendFrameMessage(sendFrameTemp.data(), sendFrameTemp.size() + 1);
m_webSocket.sendTextMessage(sendFrameMessage);
}
void QTWebStompClient::Send(const char* destination, const char* message, map<string, string> headers)
{
headers[std::string("destination")] = std::string(destination);
StompMessage s("SEND", headers, message);
Send(s);
}