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Error: Protocol "https" is unknown

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #3

    Hi,

    As @Ronel_qtmaster wrote, you need matching OpenSSL but only the series should be the same e.g. 0.9, 1.0, 1.1 (it's not compatible with 1.0).
    Also, you have to ensure that Qt is built with OpenSSL support.

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    • Ronel_qtmasterR Ronel_qtmaster

      @jabille have you checked if it supports SLL using QSslSocket::supportsSsl() ?
      If yes , you have to link your app with the exact openssl libs and corresponding to the openssl installed version.
      For linux, you can try android openssl libraries. check this https://github.com/KDAB/android_openssl

      J Offline
      J Offline
      jabille
      wrote on last edited by jabille
      #4

      @Ronel_qtmaster @SGaist I don't think QSslSocket::supportsSsl() is supported in Qt 5.2.1. I am getting an error on this line.

      Error is: Use of undeclared identifier QSslSocket

      jsulmJ SGaistS 2 Replies Last reply
      0
      • J jabille

        @Ronel_qtmaster @SGaist I don't think QSslSocket::supportsSsl() is supported in Qt 5.2.1. I am getting an error on this line.

        Error is: Use of undeclared identifier QSslSocket

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #5
        This post is deleted!
        1 Reply Last reply
        0
        • J jabille

          @Ronel_qtmaster @SGaist I don't think QSslSocket::supportsSsl() is supported in Qt 5.2.1. I am getting an error on this line.

          Error is: Use of undeclared identifier QSslSocket

          SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #6

          @jabille said in Error: Protocol "https" is unknown:

          @Ronel_qtmaster @SGaist I don't think QSslSocket::supportsSsl() is supported in Qt 5.2.1. I am getting an error on this line.

          Error is: Use of undeclared identifier QSslSocket

          As silly as it may sound: did you include the proper header ?

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          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          J 1 Reply Last reply
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          • SGaistS SGaist

            @jabille said in Error: Protocol "https" is unknown:

            @Ronel_qtmaster @SGaist I don't think QSslSocket::supportsSsl() is supported in Qt 5.2.1. I am getting an error on this line.

            Error is: Use of undeclared identifier QSslSocket

            As silly as it may sound: did you include the proper header ?

            J Offline
            J Offline
            jabille
            wrote on last edited by
            #7

            @SGaist Yes. I #include <QSslSocket> and it the code is building properly on my Qt 6.7.3 Kit (Windows) but not on my Qt 5.2.1 Kit (Generates package installed to Linux device).

            jsulmJ 1 Reply Last reply
            0
            • J jabille

              @SGaist Yes. I #include <QSslSocket> and it the code is building properly on my Qt 6.7.3 Kit (Windows) but not on my Qt 5.2.1 Kit (Generates package installed to Linux device).

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #8

              @jabille QSslSocket is available since Qt 4.3.
              Do you have

              QT += network
              

              in your pro file?
              How did you install Qt 5.2.1? Maybe network module is missing in this Qt installation?

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by SGaist
                #9

                Beside the question from @jsulm, are you sure that version of Qt was built with OpenSSL support ?

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                • J Offline
                  J Offline
                  jabille
                  wrote on last edited by
                  #10

                  Yes, I also have QT += network. I can confirm that network module is there.
                  I am able to get a proper response for a QNetworkRequest in 5.2.1 but only in http. If I set the url to https, I get the error: Protocol https is unknown. QNetworkAccessManager supportedSchemes() also does not list https.

                  How do I check if it has OpenSSL support other than QSslSocket::supportsSsl()? The thing is that the qt5.2.1-arm-linux came from the device vendor. It is included in their SDK. So, they might be some things that are missing.

                  Also, sorry if I am replying to both of you at once. I can only post every 600 seconds as a newbie here.

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    You have the answer: the class is not available so it was not built with OpenSSL support.

                    You have to check with your vendor.

                    On that note, seeing the version of Qt, the versions of OpenSSL supported at that time are also now obsolete so I would highly recommend considering porting to a more recent version of Qt.

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                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                    J 1 Reply Last reply
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                    • SGaistS SGaist

                      You have the answer: the class is not available so it was not built with OpenSSL support.

                      You have to check with your vendor.

                      On that note, seeing the version of Qt, the versions of OpenSSL supported at that time are also now obsolete so I would highly recommend considering porting to a more recent version of Qt.

                      J Offline
                      J Offline
                      jabille
                      wrote on last edited by
                      #12

                      @SGaist I see. I'll talk to the vendor regarding this.
                      When I tried to copy the path of the #include <QSslSocket>, I can see that it is in the C:\NPT_SDK\Linux\Core\third-party\qt5.2.1-arm-linux\include\QtNetwork and inside qsslsocket.h there is a flag QT_NO_SSL. Maybe that is why it is disabled? I have no clue how that is set or where it's from.

                      jsulmJ 1 Reply Last reply
                      0
                      • hskoglundH Offline
                        hskoglundH Offline
                        hskoglund
                        wrote on last edited by
                        #13

                        Also, to verify that your SSL works, you can try to compile and run the Secure Socket Client example app in Qt 5.2.1

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                        0
                        • J jabille

                          @SGaist I see. I'll talk to the vendor regarding this.
                          When I tried to copy the path of the #include <QSslSocket>, I can see that it is in the C:\NPT_SDK\Linux\Core\third-party\qt5.2.1-arm-linux\include\QtNetwork and inside qsslsocket.h there is a flag QT_NO_SSL. Maybe that is why it is disabled? I have no clue how that is set or where it's from.

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #14

                          @jabille said in Error: Protocol "https" is unknown:

                          Maybe that is why it is disabled?

                          No, it is there because Qt was built without SSL support. You need a Qt build with SSL support.

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