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  4. [SOLVED][QHttp] qhttp->get("/index.html?text=AAA",file) Doesn't work correctly
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[SOLVED][QHttp] qhttp->get("/index.html?text=AAA",file) Doesn't work correctly

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  • J Offline
    J Offline
    jaszczomb
    wrote on last edited by
    #5

    I've got a problem in Your code LinusA. I tried to initialize QNetworkRequest myRequest(myURL); I've got "Variable 'QNetworkRequest myReques' has initializer but incompatible type". What could I do wrong? To be sure if everything is as you said I've copied Your code.

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    • sierdzioS Offline
      sierdzioS Offline
      sierdzio
      Moderators
      wrote on last edited by
      #6

      Possible cause of the problem may be that ::get() call is asynchronous, so you should wait for requestFinished() signal to be emitted before reading. Also, I assume that "text" variable is a QString? And, in first QDebug() you should probably use "file->size()" instead of "plik->size()".

      And indeed, QHttp is deprecated, try QNAM, it's fun! :D

      (Z(:^

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      • J Offline
        J Offline
        jaszczomb
        wrote on last edited by
        #7

        That's not where problem is because /index.html without GET is being downloaded correctly. Only the one with GET (/index.html?text=some+text) causes problems.

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        • L Offline
          L Offline
          LinusA
          wrote on last edited by
          #8

          [quote author="jaszczomb" date="1312299549"]I've got a problem in Your code LinusA. I tried to initialize QNetworkRequest myRequest(myURL); I've got "Variable 'QNetworkRequest myReques' has initializer but incompatible type". What could I do wrong? To be sure if everything is as you said I've copied Your code.[/quote]
          Hm, since "Variable 'QNetworkRequest myReques' has initializer but incompatible type" looks like a typo (myReques vs myRequest), could you please post your code and the exact error message with line number, please?

          As I said, I didn't even compile this code, just gave a rough idea how to use QNetworkAccessManager. It's all in the docs.

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          • J Offline
            J Offline
            jaszczomb
            wrote on last edited by
            #9

            @ ui->setupUi(this);
            connect(ui->przycisk,SIGNAL(clicked()),this,SLOT(pobieranie()));
            QUrl url(QString("http://website.info/index.html"));
            url.addQueryItem(QString("text"), QString("some+text"));
            QNetworkRequest request(url); //12 line in my cpp file
            QNetworkAccessManager manager(this);
            QNetworkReply * pReply = manager.get(request);
            QByteArray byteData = pReply->readAll();
            QString stringData(byteData);@
            Message: "12: error:variable ‘QNetworkRequest request’ has initializer but incomplete type"
            That's all in constructor of an application. Until it's not working I won't write anything more because next step is to find links from the document with .indexOf (that's why I'm converting site to QString).
            I'll search the Docs to find an answer but any of your suggestions is very helpful.

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            • D Offline
              D Offline
              dangelog
              wrote on last edited by
              #10

              You need an #include.

              Software Engineer
              KDAB (UK) Ltd., a KDAB Group company

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              • J Offline
                J Offline
                jaszczomb
                wrote on last edited by
                #11

                @#include <QMainWindow>
                #include <QUrl>
                #include <QFile>
                #include <QTextStream>
                #include <QDebug>
                #include <QNetworkAccessManager>@
                Here is my Include section. Should I include something more?

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                • J Offline
                  J Offline
                  jaszczomb
                  wrote on last edited by
                  #12

                  Peppe you were right, it's because I had to place one more include.
                  Now i have one more problem with QByteArray byteData = pReply->readAll() but I hope I can make it on my own since now. Thank you everyone :]

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                  • L Offline
                    L Offline
                    LinusA
                    wrote on last edited by
                    #13

                    [quote author="jaszczomb" date="1312309394"]
                    Now i have one more problem with QByteArray byteData = pReply->readAll() but I hope I can make it on my own since now. [/quote]
                    I could imagine you might have to call
                    @
                    if (!pReply->open(QIODevice::ReadOnly)) {
                    // Error: something went wrong,
                    }
                    // you can also check pReply->isOpen() now
                    pReply->readAll();
                    @
                    See docs of QIODevice.

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                    • M Offline
                      M Offline
                      mlong
                      wrote on last edited by
                      #14

                      Be sure and take note of sierdzio's post above. If you call readAll() immediately after the get(), then there more than likely won't be anything to read yet.

                      You probably want to look at either "QNetworkRequest::finished()":http://doc.qt.nokia.com/4.7/qnetworkreply.html#finished or "QNetworkAccessManager::finished()":http://doc.qt.nokia.com/4.7/qnetworkaccessmanager.html#finished

                      Software Engineer
                      My views and opinions do not necessarily reflect those of anyone -- living or dead, real or fictional -- in this universe or any other similar multiverse node. Void where prohibited. Your mileage may vary. Caveat emptor.

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                      • sierdzioS Offline
                        sierdzioS Offline
                        sierdzio
                        Moderators
                        wrote on last edited by
                        #15

                        Just a quick additional note on my last post - if you don't want to make your class asynchronous, too, you can wait for the signal right in your constructor, with something like this:

                        @forever
                        {
                        if (/* Check for reply here /)
                        {
                        /
                        Do reading here */
                        }
                        else
                        {
                        // This ensures that your application will respond to events while waiting for the reply
                        qApp->processEvents();
                        }
                        }
                        @
                        Although doing it in the constructor might be dangerous. Also, it will wait for an answer indefinitely... be careful :)

                        (Z(:^

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