375 lines
10 KiB
C++
375 lines
10 KiB
C++
#include "headers/baseconn.h"
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BaseConn * pGlobalBaseConn = nullptr;
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BaseConn::BaseConn(QObject *parent) : QObject(parent)
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{
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pGlobalBaseConn = this;
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socket = new QTcpSocket(this);
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this->timeoutTimer = new QTimer(this);
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this->timeoutTimer->setSingleShot(true);
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this->state = "disconnected";
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connect(this->socket, SIGNAL(error(QAbstractSocket::SocketError)),
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this, SLOT(gotError(QAbstractSocket::SocketError)));
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connect(this->socket, &QAbstractSocket::stateChanged, this, &BaseConn::socketStateChanged);
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this->nextConnectionId = 1;
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this->connections = QVariantList({});
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}
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void BaseConn::connectToHost() {
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qDebug() << "connecting";
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setState("connecting");
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this->connection_progress = 0;
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connect(this->timeoutTimer, SIGNAL(timeout()), this, SLOT(connectionTimeout()));
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//connect
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this->socket->connectToHost(this->ip, this->port);
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timeoutTimer->start(3000);
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}
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void BaseConn::connectionTimeout() {
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this->socket->abort();
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disconnect(this->timeoutTimer, SIGNAL(timeout()), this, SLOT(connectionTimeout()));
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}
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bool BaseConn::init() {
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disconnect(this->timeoutTimer, SIGNAL(timeout()), this, SLOT(connectionTimeout()));
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this->timeoutTimer->stop();
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connect(this->socket, &QTcpSocket::readyRead, this, &BaseConn::readyRead);
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this->connection_progress = 50;
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return true;
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}
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void BaseConn::deInit() {
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this->connections.clear();
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}
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void BaseConn::closeConnection()
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{
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this->connections = QVariantList({});
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emit this->connectionsChanged();
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qDebug() << "closing connection";
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switch (socket->state())
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{
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case 0:
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socket->disconnectFromHost();
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break;
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case 2:
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socket->abort();
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break;
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default:
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socket->abort();
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}
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setState("disconnected");
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}
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void BaseConn::gotError(QAbstractSocket::SocketError err)
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{
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//qDebug() << "got error";
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QString strError = "unknown";
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switch (err)
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{
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case 0:
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strError = "Connection was refused";
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break;
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case 1:
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strError = "Remote host closed the connection";
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this->closeConnection();
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break;
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case 2:
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strError = "Host address was not found";
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break;
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case 5:
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strError = "Connection timed out";
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break;
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default:
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strError = "Unknown error";
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}
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emit gotError(strError);
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qDebug() << "got socket error: " << strError;
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}
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// -------------------------------------
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// --- socket communication handling ---
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// -------------------------------------
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void BaseConn::socketStateChanged(QAbstractSocket::SocketState socketState) {
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switch (socketState) {
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case QAbstractSocket::UnconnectedState:
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{
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this->setState("disconnected");
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break;
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}
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case QAbstractSocket::ConnectedState:
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{
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if(this->init()) {
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this->setState("connected");
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}
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else {
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this->closeConnection();
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}
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break;
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}
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default:
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{
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//qDebug() << "+ --- UNKNOWN SOCKET STATE: " << socketState;
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break;
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}
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}
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}
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QVariantMap BaseConn::sendCommand(int header, QJsonValue data){
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if(this->state != "connected"){
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return {{"status", 910}, {"data", "not connected"}};
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}
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// generate id and witing requests entry
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int thisId = nextConnectionId;
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//qDebug() << "sending command: " << header << " with data: " << data << " and id: " << thisId;
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nextConnectionId ++;
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QEventLoop *loop = new QEventLoop(this);
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QTimer *timer = new QTimer(this);
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QJsonObject reply;
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this->waitingRequests.append({thisId, loop, reply});
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QJsonObject requestObj;
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requestObj.insert("id", thisId);
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requestObj.insert("header", header);
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requestObj.insert("data", data);
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QString jsonRequest = QJsonDocument(requestObj).toJson();
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timer->setSingleShot(true);
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// quit the loop when the timer times out
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loop->connect(timer, SIGNAL(timeout()), loop, SLOT(quit()));
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// quit the loop when the connection was established
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// loop.connect(this, &BaseConn::gotReply, &loop, &QEventLoop::quit);
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// start the timer before starting to connect
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timer->start(3000);
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//write data
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socket->write(jsonRequest.toLatin1());
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//wait for an answer to finish (programm gets stuck in here)
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loop->exec();
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bool replyFound = false;
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// find reply and delete the request from waiting list
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for(int i = 0; i<this->waitingRequests.length(); i++){
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if(this->waitingRequests[i].id == thisId){
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// request was found
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replyFound = true;
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// delete event loop
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if(this->waitingRequests[i].loop != nullptr) {
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delete this->waitingRequests[i].loop;
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}
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// store reply
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reply = this->waitingRequests[i].reply;
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// remove reply from waiting list
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this->waitingRequests.removeAt(i);
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}
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}
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if(!replyFound) {
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// some internal error occured
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return {{"status", 900}, {"data", ""}};
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}
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if(timer->remainingTime() == -1){
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//the time has been triggered -> timeout
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return {{"status", 911}, {"data", ""}};
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}
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delete timer;
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return {{"status", reply.value("header").toInt()}, {"data", reply.value("data").toVariant()}};
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}
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void BaseConn::readyRead() {
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//qDebug() << "ready to ready " << socket->bytesAvailable() << " bytes" ;
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QString reply = socket->readAll();
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//qWarning() << "socket read: " << reply;
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processSocketMessage(reply);
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}
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void BaseConn::processSocketMessage(QString message){
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QString startKey = "<message>";
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QString endKey = "</message>";
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//qWarning() << "... processing message now ... : " << message;
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if(message == ""){
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return;
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}
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if((message.startsWith(startKey) && message.endsWith(endKey)) && (message.count(startKey) == 1 && message.count(endKey) == 1)){
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// non-split message ( e.g.: <message>123456789</message>
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}
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else if(!message.contains(endKey) && (!this->readBuffer.isEmpty() || message.startsWith(startKey))){
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// begin of a split message ( e.g.: <message>123 )
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// or middle of a split message ( e.g.: 456 )
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//qWarning() << "this is a begin or middle of split a message";
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this->readBuffer += message;
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return;
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}
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else if(!message.contains(startKey) && message.endsWith(endKey)) {
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// end of a split message ( e.g.: 789</message> )
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if(!this->readBuffer.isEmpty()){
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message = readBuffer + message;
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readBuffer.clear();
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}
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}
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else if((message.count(startKey) > 1 || message.count(endKey) > 1) || (message.contains(endKey) && !message.endsWith(endKey) && message.contains(startKey) && !message.startsWith(startKey))) {
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// multiple messages in one packet ( e.g.: <message>123456789</message><message>987654321</message> )
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// or multiple message fragments in one message ( e.g.: 56789</message><message>987654321</message> or 56789</message><message>98765 )
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//qDebug() << "detected multiple messages";
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int startOfSecondMessage = message.lastIndexOf(startKey);
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// process first part of message
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QString firstMessage = message.left(startOfSecondMessage);
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this->processSocketMessage(firstMessage);
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// process second part of message
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QString secondMessage = message.right(message.length() - startOfSecondMessage);
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this->processSocketMessage(secondMessage);
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return;
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}
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else {
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// invalid message
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return;
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}
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//qWarning() << "... done processing, message: " << message;
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this->socketReplyRecieved(message);
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}
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void BaseConn::socketReplyRecieved(QString reply) {
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reply.replace("<message>", "");
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reply.replace("</message>", "");
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int id = 0;
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QJsonDocument jsonReply = QJsonDocument::fromJson(reply.toUtf8());
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QJsonObject replyObj = jsonReply.object();
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//qDebug() << "got: " << reply;
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if(!replyObj.isEmpty()){
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id = replyObj.value("id").toInt();
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for(int i = 0; i < this->waitingRequests.length(); i++){
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if(this->waitingRequests[i].id == id){
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this->waitingRequests[i].reply = replyObj;
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if(this->waitingRequests[i].loop != nullptr){
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this->waitingRequests[i].loop->quit();
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}
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return;
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}
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}
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}
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latestReadReply = reply;
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emit gotUnexpectedReply(reply);
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}
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// ------------------------
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// --- helper functions ---
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// ------------------------
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int BaseConn::writeRemoteSetting(QString key, QString value) {
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QJsonArray requestData;
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requestData.append(key);
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requestData.append(value);
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return this->sendCommand(3000, requestData)["status"].toInt();
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}
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void BaseConn::setIP(const QString &ipAdress){
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this->ip = ipAdress;
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}
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QString BaseConn::getIP() const
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{
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return(this->ip);
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}
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QString BaseConn::getState() const
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{
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return(this->state);
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}
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void BaseConn::setState(QString newState){
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if(this->state != newState) {
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qDebug() << "+--- BaseConn state changed: " << newState;
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this->state = newState;
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emit stateChanged();
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if(this->state == "disconnected") {
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this->deInit();
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}
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}
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}
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int BaseConn::getProgress() const
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{
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return(connection_progress);
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}
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bool BaseConn::refreshConnections() {
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QVariantMap reply = this->sendCommand(2006);
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if(reply["status"] != 200){
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//handle Error!!
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if(reply["status"] == 910){
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this->connections = QVariantList({});
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return true;
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}
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qDebug() << "+ --- error refreshing connections: " << reply["status"];
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return false;
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}
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QVariantList tmpConnections = reply["data"].toList();
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if(this->connections != reply["data"].toList()){
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this->connections = reply["data"].toList();
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emit this->connectionsChanged();
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}
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return true;
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}
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QVariant BaseConn::getConnections() {
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return(connections);
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/*
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"id": "id of the extention (int)",
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"type": "type of the extention (can be: 'STARTPAD', 'TOPPAD')",
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"name": "name of the extention",
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"ip": "ip-adress of he extention (string)",
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"state": "state of the extention (can be: 'disconnected', 'connecting', 'connected')"
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*/
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//QVariantMap conn = {{"id",0}, {"type","STARTPAD"}, {"name", "startpad1"}, {"ip", "192.168.4.11"}, {"state", "connected"}};
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//QVariantMap conn1 = {{"id",0}, {"type","TOPPAD"}, {"name", "buzzer1"}, {"ip", "192.168.4.10"}, {"state", "connected"}};
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//QVariantList conns = {conn, conn1};
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//return conns;
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}
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