Sending mp3 files over QTcpSocket

[ada10]

I am trying write a server application which reads an mp3 file on the file system & sends it to a client app through QTcpSocket using the following code -

QFile htmlfile("c:\\server_files\\ywr.mp3");
            if (!htmlfile.open(QIODevice::ReadOnly))
                     return;
 
            QTextStream os( clientSocket );
            //os.setAutoDetectUnicode(true);
            os << "HTTP/1.0 200 Ok\r\n"
                  "Content-Type: audio/mpeg; charset=\"utf-8\"\r\n"
                  "\r\n";
            os.flush();
 
            // Streaming the file
            QByteArray block = htmlfile.readAll();
            clientSocket->write(block);

QFile htmlfile("c:\\server_files\\ywr.mp3");
            if (!htmlfile.open(QIODevice::ReadOnly))
                     return;

            QTextStream os( clientSocket );
            //os.setAutoDetectUnicode(true);
            os << "HTTP/1.0 200 Ok\r\n"
                  "Content-Type: audio/mpeg; charset=\"utf-8\"\r\n"
                  "\r\n";
            os.flush();

            // Streaming the file
            QByteArray block = htmlfile.readAll();
            clientSocket->write(block);

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The server application crashes when this code is executed. What is the problem in the above code ? Is the method of reading the mp3 file faulty ?