I am writing a simple multithreaded Http server using QTcpServer. The server spawns a new thread for every client connection. The new thread is being created in a slot connected to the readyRead() signal.


Qt Code: 
  1. void serverwindow::AcceptClientConn()
  2. {
  3.     ui->textEdit->append("\nNew client connection received");
  4.  
  5.     clientConnection = tcpServer->nextPendingConnection();
  6.  
  7.     ui->textEdit->append("\nNew client connection socketobtained");
  8.  
  9.     connect(clientConnection, SIGNAL(disconnected()),
  10.                 clientConnection, SLOT(deleteLater()));
  11.  
  12.     connect( clientConnection, SIGNAL(readyRead()),
  13.              this, SLOT(readClient()) );
  14. }
  15.  
  16. void serverwindow::readClient()
  17. {
  18. //read the data obtained from client
  19.  
  20.     ui->textEdit->append("\nreadClient");
  21.     QTcpSocket* clientSocket = (QTcpSocket*)sender();
  22.  
  23.     //create new thread to handle the client request
  24.     clienthandler* clientThread = new clienthandler( clientSocket );
  25.  
  26.     connect( clientThread,SIGNAL(finished()),
  27.              clientThread,SLOT(deleteLater()) );
  28.     clientThread->start();
  29.     clientThread->setPriority(QThread::HighestPriority);
  30.  
  31. }
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The clienthandle is a subclass of QThread. Its implementation of run() method is as below -

Qt Code: 
  1. void clienthandler::run()
  2. {
  3.     clientConnSocket->moveToThread(QThread::currentThread());
  4.     if(clientConnSocket->canReadLine())
  5.     {
  6.         QString curData(clientConnSocket->readLine());
  7.         QStringList tokens = curData.split(QRegExp("[ \r\n][ \r\n]*"));
  8.         if ( tokens[0] == "GET" )
  9.         {
  10.             //try to send a file's contents
  11.  
  12.             //1. Small sized html file
  13.             QFile htmlfile("c:\\server_files\\index.html");
  14.  
  15.             if (!htmlfile.open(QIODevice::ReadOnly))
  16.                      return;
  17.  
  18.             QString content_type = "video/mp4;";
  19.             QTextStream os( clientConnSocket );
  20.             //os.setAutoDetectUnicode(true);
  21.             os << "HTTP/1.0 200 Ok\r\n"
  22.                   "Content-Type: "<< content_type <<"charset=\"utf-8\"\r\n"
  23.                   "\r\n";
  24.             os.flush();
  25.  
  26.             // Streaming the file
  27.             QByteArray block = htmlfile.readAll();
  28.             clientConnSocket->write(block);
  29.         }
  30.     }
  31.     clientConnSocket->disconnectFromHost();
  32.     clientConnSocket->close();
  33. }
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When i run the server, it receives client connections but issues the following error -

QObject::moveToThread: Cannot move objects with a parent
QObject: Cannot create children for a parent that is in a different thread.
(Parent is QNativeSocketEngine(0x9640878), parent's thread is QThread(0x3d59e8), current thread is clienthandler(0x9644cb0)
QSocketNotifier: socket notifiers cannot be disabled from another thread


What changes should i make in the code to avoid these errors ? I know its the problem with the socket reference being passed to the new thread , but how else can I do it ? I know this question has been asked in this forum a lot many times, but I could not find a suitable answer.