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QtWS25 Last Chance

Sending a file to website through post request

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  • B Offline
    B Offline
    b1gsnak3
    wrote on last edited by
    #5

    I have multiple parameters in my php.. for example a post would look like:

    a=upload&t=token&file=image

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    • raven-worxR Offline
      raven-worxR Offline
      raven-worx
      Moderators
      wrote on last edited by
      #6

      if that's all the info you're providing i think nobody will be able to help you.

      What isn't working?
      How you you create the Request?
      etc.

      --- SUPPORT REQUESTS VIA CHAT WILL BE IGNORED ---
      If you have a question please use the forum so others can benefit from the solution in the future

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      • B Offline
        B Offline
        b1gsnak3
        wrote on last edited by
        #7

        @
        QUrl url;
        url.addQueryItem("a", "upload");
        url.addQueryItem("t", token);
        url.addQueryItem("file", pictureByteArray.toHex());

        QNetworkRequest req;
        req.setUrl("www.example.com/sth.php");

        QNetworkAccessManager networkAM;
        networkAM.post(req, url.encodedQuery());

        connect(&networkAM, SIGNAL(finished(QNetworkReply ), this, SLOT(replyHandler(QNetworkReply)));
        @

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        • K Offline
          K Offline
          KA51O
          wrote on last edited by
          #8

          Just from having a look at the documentation of QNAM::post I can tell that this line can not work.
          @
          networkAM.post(req, url.encodedQuery());
          @

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          • B Offline
            B Offline
            b1gsnak3
            wrote on last edited by
            #9

            Well.. This is weird as I get reply from server... Why do you say it will not work?

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            • K Offline
              K Offline
              KA51O
              wrote on last edited by
              #10

              Ok. I have no experience with QNAM, but the doc just mentioned QIODevice, const QByteArray & and QHttpMultiPart * as candidates for the second argument of post. And since QUrl inherits from none of these I thought this could not work.

              I would have tried something like this. But this is just a shot in the dark.
              @
              QUrl url ("www.example.com/sth.php");
              url.addQueryItem("a", "upload");
              url.addQueryItem("t", token);
              //url.addQueryItem("file", pictureByteArray.toHex()); Not sure if this is needed with my suggestion

              QNetworkRequest req;
              req.setUrl(url);

              QNetworkAccessManager networkAM;
              QFile* myImage = new QFile("filePath")
              if(myImage->open(QIODevice::ReadOnly))
              {
              networkAM.post(req, myImage);
              }
              @

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              • B Offline
                B Offline
                b1gsnak3
                wrote on last edited by
                #11

                QUrl::encodedQuery() returns a QByteArray

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                • K Offline
                  K Offline
                  KA51O
                  wrote on last edited by
                  #12

                  Ahh ok. Sry for the confusion I caused.

                  Edit: Maybe the problem is related to this comment from the docs of QNAM::post [quote]data must be open for reading and must remain valid until the finished() signal is emitted for this reply.[/quote]

                  The object returned by QUrl::encodedQuery goes out of scope after the function returns ?

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                  • B Offline
                    B Offline
                    b1gsnak3
                    wrote on last edited by
                    #13

                    That is not the problem.. I created a new QByteArray to store the return value but still nothing happens... I think I must create my own model for sending after sniffing what a post method in php sends to the server :( bleah got into software to escape web dev and now i have to do this... Thank you I will submit some code example after I finish (if I finish)

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                    • K Offline
                      K Offline
                      KA51O
                      wrote on last edited by
                      #14

                      ^^ Completely agree on the web dev part. Maybe "the example in the QHtmlMultiPart doc":http://qt-project.org/doc/qt-4.8/qhttpmultipart.html#details can be helpful ? Anyways good luck.

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                      • C Offline
                        C Offline
                        Code_ReaQtor
                        wrote on last edited by
                        #15

                        Try to use "FormPost":http://www.tuckdesign.com/sources/Qt

                        I have a similar problem when I am starting to code for an API which includes a "HTML Form" for sending files to a server. I used QNAM::post()... tried QHttpMultiPart... but still they won't work. Found out that there is something wrong with QHttpMultiPart and it uses a different specification (RFC 2046).

                        FormPost should work. I just modified some parts of it and it worked like a charm. You can visit my "site":https://github.com/Code-ReaQtor/libqsendspace/tree/master/qsendspace/src for reference.

                        Please visit my open-source projects at https://github.com/Code-ReaQtor.

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                        • B Offline
                          B Offline
                          b1gsnak3
                          wrote on last edited by
                          #16

                          Ty very much I believe this is what I must use I think. xD Will try tomorrow today my head is pounding from head banging the keyboard ^^

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                          • B Offline
                            B Offline
                            b1gsnak3
                            wrote on last edited by
                            #17

                            Ok so QHttpMultiPart doesn't work (wish I would've checked the post sooner, before head banging my head with it, seeing as someone already tried using this). Will try your solution tomorrow, thank you Code_ReaQtor

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