Why this happened?(about use SocketStream many times)

[coolzdp]

Server code is:

Code: Select all


void FileServer::run()
{
   _ready.set();
   Poco::Timespan span(250000);
   while (!_stop)
   {
      if (_socket.poll(span, Socket::SELECT_READ))
      {
         StreamSocket ss = _socket.acceptConnection();
         std::string path;
         try
         {
            for (int i = 0; i < 3; i++)
            {
               SocketStream str(ss);
               BinaryReader r(str);

               r >> path;
               std::cout << i << " path is: " << path << std::endl;
            }
            
         }
         catch (Poco::Exception& exc)
         {
            std::cerr << "FileServer: " << exc.displayText() << std::endl;
         }
      }
   }
}


Client is:

Code: Select all


         StreamSocket ss;
         unsigned short port = 1970;
         std::string path;
         ss.connect(SocketAddress("localhost", port));

         for (int i = 0; i < 3; i++)
         {
            SocketStream str(ss);
            BinaryWriter w(str);
            w << "AAAA";
            w.flush();
            //Thread::sleep(1);  // if no this code, only send one time,
                        //then server will hang up on second "r >> path;", why?
         }


[alex]

On the server side, all the data is received by the first ))SocketStream(( you create. However, only the first 4 characters are extracted by the ))BinaryReader((.

When you get into the next step and create new SocketStream, there's no data left, since it is gone with the previous ))SocketStream((.

This should solve your problem:

Code: Select all


SocketStream str(ss);
BinaryReader r(str);
for (int i = 0; i < 3; ++i) r >> path;


HTH

Alex