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How to connect via API?

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  • M Mikeeeeee

    Not check. I don't know what other resource to connect to.

    Pablo J. RoginaP Offline
    Pablo J. RoginaP Offline
    Pablo J. Rogina
    wrote on last edited by
    #37

    @Mikeeeeee you may try a JSON testing site with secure connections, like https://jsonplaceholder.typicode.com

    i.e. https://jsonplaceholder.typicode.com/todos/1 will return:

    {
      "userId": 1,
      "id": 1,
      "title": "delectus aut autem",
      "completed": false
    }
    

    Upvote the answer(s) that helped you solve the issue
    Use "Topic Tools" button to mark your post as Solved
    Add screenshots via postimage.org
    Don't ask support requests via chat/PM. Please use the forum so others can benefit from the solution in the future

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    • M Offline
      M Offline
      Mikeeeeee
      wrote on last edited by
      #38

      @Pablo-J.-Rogina said in How to connect via API?:

      https://jsonplaceholder.typicode.com/todos/1

      Tried to send to this address and got an old error.

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      • M Offline
        M Offline
        Mikeeeeee
        wrote on last edited by
        #39

        And if you sent"http://json placeholder.typecode.com/todos/1" it works. Why https doesn't work?

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #40

          Just to be sure add this to your code:

          qDebug() << QSslSocket::supportsSsl();
          qDebug() << QSslSocket::sslLibraryBuildVersionString();
          qDebug() << QSslSocket::sslLibraryVersionString();
          

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • M Offline
            M Offline
            Mikeeeeee
            wrote on last edited by
            #41

            qDebug returns:
            qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed
            false
            "OpenSSL 1.0.2p 14 Aug 2018"

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            • SGaistS Offline
              SGaistS Offline
              SGaist
              Lifetime Qt Champion
              wrote on last edited by
              #42

              Are you sure you put the OpenSSL 1.0 dlls in the right folder ? Without mixing them with another version of OpenSSL.

              Interested in AI ? www.idiap.ch
              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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              • M Offline
                M Offline
                Mikeeeeee
                wrote on last edited by
                #43

                Sure. Here is the contents of the folder:
                0_1558769898345_1.png

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                • mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #44

                  hi
                  I wonder if it also wants libssl32.dll ?

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                  • I Offline
                    I Offline
                    IRayman
                    wrote on last edited by
                    #45

                    hey @Mikeeeeee,

                    You can try those .dll. I used it few weeks ago when I needed Qt SSL on Windows and it worked fine.

                    https://anonfile.com/m2Z7N6s6nd/dll_zip

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                    • M Offline
                      M Offline
                      Mikeeeeee
                      wrote on last edited by SGaist
                      #46

                      Thanks. https is working.
                      Trying to use the function TIME_SERIES_DAILY_ADJUSTED.
                      https://www.alphavantage.co/documentation/
                      If you do so it works:

                      request.setUrl(QUrl("https://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=MSFT&outputsize=compact&apikey=XXXXXXXXXXXXX"));
                      

                      If doing so does not work:

                      request.setUrl(QUrl("https://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=MSFT&outputsize=full&apikey=XXXXXXXXXXXXXXX"));
                      

                      It's me doing something wrong or the server is not working?

                      [edit: removed API key SGaist]

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #47

                        Since you don't show how you are processing the QNetworkReply object created for your request one can only guess. What signals did you connect from the reply object ? What exactly do you mean by "does not work" ?

                        By the way, I've edited out your api key, it's not a good idea to post such information.

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                        • M Offline
                          M Offline
                          Mikeeeeee
                          wrote on last edited by
                          #48

                          It's my h-file:

                          private slots:
                              void on_testButton_clicked();
                              void testSlotFromQDebug();
                              void onReply(QNetworkReply* reply);
                          
                          private:
                              Ui::MainWindow *ui;
                              QNetworkAccessManager *apiQuery = new QNetworkAccessManager;
                          

                          it's cpp-file:```
                          #include "mainwindow.h"
                          #include "ui_mainwindow.h"

                          MainWindow::MainWindow(QWidget *parent) :
                          QMainWindow(parent),
                          ui(new Ui::MainWindow)
                          {
                          ui->setupUi(this);

                          //connect(apiQuery, &QNetworkAccessManager::finished, this, &MainWindow::testSlotFromQDebug);
                          

                          }

                          MainWindow::~MainWindow()
                          {
                          delete ui;
                          }

                          void MainWindow::on_testButton_clicked()
                          {
                          QNetworkRequest request;
                          //request.setUrl(QUrl("https://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=MSFT&apikey=demo"));
                          request.setUrl(QUrl("https://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=MSFT&outputsize=full&apikey=111111"));
                          //request.setUrl(QUrl("https://www.alphavantage.co/query?function=TIME_SERIES_DAILY_ADJUSTED&symbol=MSFT&outputsize=compact&apikey=1111"));

                          QNetworkReply* reply = apiQuery->get(request);
                          connect(reply ,&QNetworkReply::finished,this,std::bind(&MainWindow::onReply,this,reply ));
                          

                          }

                          void MainWindow::testSlotFromQDebug()
                          {
                          //qDebug()<<"point1";
                          }

                          void MainWindow::onReply(QNetworkReply* reply){
                          QJsonDocument jdoc = QJsonDocument::fromJson(reply->readAll());
                          //qDebug() << QSslSocket::supportsSsl();
                          //qDebug() << QSslSocket::sslLibraryBuildVersionString();
                          //qDebug() << QSslSocket::sslLibraryVersionString();
                          qDebug()<<jdoc;
                          // do something with the jdoc
                          }

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #49

                            Again: what do you mean by "it's not working" when using the full output size ?

                            Interested in AI ? www.idiap.ch
                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                            • M Offline
                              M Offline
                              Mikeeeeee
                              wrote on last edited by Mikeeeeee
                              #50

                              Nothing comes back. I do not receive json document.

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                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #51

                                What about connecting the errors related signals ? That might give you some clues about what is happening.

                                Interested in AI ? www.idiap.ch
                                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                • M Offline
                                  M Offline
                                  Mikeeeeee
                                  wrote on last edited by
                                  #52

                                  But what signals and slots to use to find the error?

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                                  • M Offline
                                    M Offline
                                    Mikeeeeee
                                    wrote on last edited by
                                    #53
                                    This post is deleted!
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                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #54

                                      Maybe QNetworkReply::error ?

                                      Interested in AI ? www.idiap.ch
                                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                      • M Offline
                                        M Offline
                                        Mikeeeeee
                                        wrote on last edited by
                                        #55

                                        I get "QNetworkReply::NoError"

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                                        • SGaistS Offline
                                          SGaistS Offline
                                          SGaist
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #56

                                          Did you also check QNetworkReply::sslErrors ?

                                          Interested in AI ? www.idiap.ch
                                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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