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    Solved Running Qt Example client/server not working

    General and Desktop
    network client server qtnetwork
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    • M
      marlenet15 @kshegunov last edited by

      @kshegunov I have been waiting for at least 5 minutes and nothing happens. I am running Qt on Linux and I don't think anything is interfering it.

      1 Reply Last reply Reply Quote 0
      • mrjj
        mrjj Lifetime Qt Champion @marlenet15 last edited by mrjj

        @marlenet15

        Hi
        The IP the server find/shows might not be valid.
        for me it was not. (just ran the samples)
        use localhost for client
        and it works for me.

        That ip is not my local IP, nor my wan.
        No interface seems to have it.

        So be sure the IP it shows is correct :)

        M 1 Reply Last reply Reply Quote 0
        • M
          marlenet15 @mrjj last edited by

          @mrjj On terminal I ran ifconfig and under wlan it shows the ip address that is shown on the fortune server. So what you are using is to use 127.0.0.1 on the client and server side as the ip address? Because that doesn't work either. :/

          mrjj 1 Reply Last reply Reply Quote 0
          • mrjj
            mrjj Lifetime Qt Champion @marlenet15 last edited by mrjj

            @marlenet15
            Ok so in linux it find right ip I guess. ( im on win)
            yes local host is that 127.x.x.x ip.
            And i use it for server IP. + the listed port.

            Are u running both samples on same machine?

            It works here both for win 7 and win 10.

            M 1 Reply Last reply Reply Quote 1
            • M
              marlenet15 @mrjj last edited by

              @mrjj I am doing exactly as you are telling me but nothing. Also, I am using Threaded Fortune Server. Are you using that as well?

              So in my Threaded Fortune Server I have :
              IP: 192.168.1.209
              port: 45127

              In my fortune client I have:
              Server name: localhost
              port: 45127

              mrjj kshegunov 2 Replies Last reply Reply Quote 0
              • mrjj
                mrjj Lifetime Qt Champion @marlenet15 last edited by

                @marlenet15
                nope, im using the "simple" ones.

                local host should work if both server and client is run on same machine.

                I will check tomorrow when i have a linux to see.

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                • kshegunov
                  kshegunov Moderators @marlenet15 last edited by

                  @marlenet15
                  That's really, really strange. Could you run the client code through the debugger? What would be the TCP error the client gets?
                  (I don't have Qt 4 to test, sorry).

                  Kind regards.

                  Read and abide by the Qt Code of Conduct

                  M 1 Reply Last reply Reply Quote 0
                  • M
                    marlenet15 @kshegunov last edited by

                    @kshegunov Ok So I used the regular Fortune Server and it works. So I am wondering why with the Threaded Fortune Server it does not work. The thing is I need to use threaded server.

                    kshegunov 1 Reply Last reply Reply Quote 0
                    • kshegunov
                      kshegunov Moderators @marlenet15 last edited by

                      @marlenet15 said:

                      So I am wondering why with the Threaded Fortune Server it does not work. The thing is I need to use threaded server.

                      Well, perhaps the example is broken; it has happened. But in any case the threaded fortune server is not really a good example of a threaded TCP server, not for real work anyway.

                      Kind regards.

                      Read and abide by the Qt Code of Conduct

                      M 1 Reply Last reply Reply Quote 1
                      • M
                        marlenet15 @kshegunov last edited by

                        @kshegunov Do you know of any good examples? Thank you.

                        kshegunov 1 Reply Last reply Reply Quote 0
                        • kshegunov
                          kshegunov Moderators @marlenet15 last edited by

                          @marlenet15
                          Honestly, no. But I was about to write something as an example for a library of mine, so I'll post when I have it.
                          Meanwhile, you should look up how to use the asynchronous TCP socket API in Qt and make your code work in single thread. Look here for example. When that's done it takes very little modification to make it work in multiple threads.

                          Kind regards.

                          Read and abide by the Qt Code of Conduct

                          M 1 Reply Last reply Reply Quote 1
                          • M
                            marlenet15 @kshegunov last edited by

                            @kshegunov Thank you so much!

                            kshegunov 1 Reply Last reply Reply Quote 0
                            • kshegunov
                              kshegunov Moderators @marlenet15 last edited by kshegunov

                              @marlenet15
                              Hi,
                              Here you can find a threaded TCP server example. You can ignore the module specific classes QDaemonApplication (think of it as QCoreApplication) and QDaemonLog you can substitute with QDebug.

                              Enjoy!
                              Kind regards.

                              Read and abide by the Qt Code of Conduct

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