Error while using QTcpSocket

Question

I am creating a (very basic) MJPG server to show webcam data on a browser. I have partly managed to do it so far.

Here is my code:

TcpSe         


        

Answer 1

It looked like the socket got closed

Rather than guessing, connect to the error signals of TCPServer and TCPSocket to know when errors occur, or when a client disconnects.

The problem you have is the while(1) loop. Qt is an event-driven framework, so having code in an infinite loop on the main thread is going to prevent events being delivered.

Instead of the infinite loop, connect to QTcpSocket::readyRead signal and handle the data when the connected slot is called.

Qt demonstrates this with the Fortune Server and Fortune Client example code.

If you're using C++ 11, you can use a connection to a lambda function to handle the readyRead, like this

void TcpServer::newConnection()
{
    ...

    QTcpSocket *m_TcpHttpClient = server->nextPendingConnection();
    connect(m_TcpHttpClient, &QTcpSocket::readyRead, [=](){

        // handle received data here

    });

}