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  4. How can i get ftp files show on my list widget using QNetworkAccessManager Qt 5.8?
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How can i get ftp files show on my list widget using QNetworkAccessManager Qt 5.8?

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #14

    Open the project .pro file with Qt Creator and build it.

    By the way, what OS are you on ?

    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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    • W Offline
      W Offline
      walter-j
      wrote on last edited by
      #15

      linux mint 18 sarah

      Josephat Kabitshwa

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      • W Offline
        W Offline
        walter-j
        wrote on last edited by
        #16

        i got this message : cannot create a directory / mkspecs/modules-inst when im building it

        Josephat Kabitshwa

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #17

          Which version of Qt are you using to build that module ?

          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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          • W Offline
            W Offline
            walter-j
            wrote on last edited by
            #18

            Qt 5.7.1 . now i can build . what can i do else?

            Josephat Kabitshwa

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            0
            • W Offline
              W Offline
              walter-j
              wrote on last edited by
              #19

              my programm does not recognize QFtp but i have already built it

              Josephat Kabitshwa

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #20

                Did you install the module ?

                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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                • W Offline
                  W Offline
                  walter-j
                  wrote on last edited by
                  #21

                  yes i have installed the module

                  Josephat Kabitshwa

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by SGaist
                    #22

                    Did you add QT += ftp to your .pro file and re-run qmake after that ?

                    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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                    • W Offline
                      W Offline
                      walter-j
                      wrote on last edited by
                      #23

                      yes.

                      But commandFinshed signal does not work. here is my code:

                      FtpDialog.h

                      #ifndef FTPDIALOG_H
                      #define FTPDIALOG_H

                      #include <QDialog>
                      #include <QFtp>
                      #include <QMessageBox>
                      #include <QDebug>

                      namespace Ui {
                      class FtpDialog;
                      }

                      class FtpDialog : public QDialog
                      {
                      Q_OBJECT

                      public:
                      explicit FtpDialog(QWidget *parent = 0);
                      ~FtpDialog();

                      public slots:
                      void connectClicked();
                      void ftpFinished(int, bool);
                      void getFileList();
                      signals:

                      private:
                      Ui::FtpDialog *ui;
                      QFtp ftp;
                      };

                      #endif // FTPDIALOG_H

                      Josephat Kabitshwa

                      jsulmJ 1 Reply Last reply
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                      • W Offline
                        W Offline
                        walter-j
                        wrote on last edited by
                        #24

                        FtpDialog.cpp

                        #include "ftpdialog.h"
                        #include "ui_ftpdialog.h"

                        FtpDialog::FtpDialog(QWidget *parent) :
                        QDialog(parent),
                        ui(new Ui::FtpDialog)
                        {
                        ui->setupUi(this);
                        connect(ui->connectButton, SIGNAL(clicked()), this, SLOT(connectClicked()));
                        connect(&ftp,SIGNAL(commandFinished(int,bool)), this, SLOT(ftpFinished(int,bool)));

                        ui->disconnectButton->setEnabled(false);
                        ui->cdButton->setEnabled(false);
                        ui->upButton->setEnabled(false);
                        ui->getButton->setEnabled(false);
                        

                        }

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

                        void FtpDialog::connectClicked()
                        {
                        ui->connectButton->setEnabled(false);

                         ftp.connectToHost("ftp.trolltech.com");
                         ui->statusLabel->setText(tr("Connecting to host..."));
                        

                        }

                        void FtpDialog::ftpFinished(int request, bool error)
                        {
                        // Handle errors depending on the command caussing it
                        qDebug()<<ftp.currentCommand();
                        if(error)
                        {
                        switch(ftp.currentCommand())
                        {
                        case QFtp::ConnectToHost:
                        QMessageBox::warning(this, tr("Error"), tr("Failed to connect to host."));
                        ui->connectButton->setEnabled(true);

                                break;
                            case QFtp::Login:
                                QMessageBox::warning(this, tr("Error"), tr("Failed to login."));
                                ui->connectButton->setEnabled(true);
                        
                                break;
                        
                            case QFtp::List:
                                QMessageBox::warning(this, tr("Error"),
                                                     tr("Failed to get file list.\nClosing connection"));
                                ftp.close();
                        
                                break;
                        
                            }
                        
                            ui->statusLabel->setText(tr("Ready."));
                        

                        }
                        // React to the current command and issue
                        // more commands or update the user interface
                        else
                        {
                        switch(ftp.currentCommand())
                        {
                        case QFtp::ConnectToHost:
                        ftp.login();

                                break;
                            case QFtp::Login:
                                getFileList();
                        
                                break;
                        
                            case QFtp::Close:
                                ui->connectButton->setEnabled(true);
                               // getFileList();
                        
                                break;
                            case QFtp::List:
                                ui->disconnectButton->setEnabled(true);
                                ui->upButton->setEnabled(true);
                                ui->statusLabel->setText(tr("Ready."));
                        
                                break;
                        
                            }
                        }
                        

                        }

                        void FtpDialog::getFileList()
                        {

                        }

                        Josephat Kabitshwa

                        J.HilkJ 1 Reply Last reply
                        0
                        • W walter-j

                          yes.

                          But commandFinshed signal does not work. here is my code:

                          FtpDialog.h

                          #ifndef FTPDIALOG_H
                          #define FTPDIALOG_H

                          #include <QDialog>
                          #include <QFtp>
                          #include <QMessageBox>
                          #include <QDebug>

                          namespace Ui {
                          class FtpDialog;
                          }

                          class FtpDialog : public QDialog
                          {
                          Q_OBJECT

                          public:
                          explicit FtpDialog(QWidget *parent = 0);
                          ~FtpDialog();

                          public slots:
                          void connectClicked();
                          void ftpFinished(int, bool);
                          void getFileList();
                          signals:

                          private:
                          Ui::FtpDialog *ui;
                          QFtp ftp;
                          };

                          #endif // FTPDIALOG_H

                          jsulmJ Offline
                          jsulmJ Offline
                          jsulm
                          Lifetime Qt Champion
                          wrote on last edited by
                          #25

                          @walter-j You should connect a slot to http://doc.qt.io/qt-4.8/qftp.html#stateChanged and see what happens

                          https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • W Offline
                            W Offline
                            walter-j
                            wrote on last edited by
                            #26

                            But in the book they used commandFinished(int, bool) signal.

                            Josephat Kabitshwa

                            jsulmJ 1 Reply Last reply
                            0
                            • W walter-j

                              FtpDialog.cpp

                              #include "ftpdialog.h"
                              #include "ui_ftpdialog.h"

                              FtpDialog::FtpDialog(QWidget *parent) :
                              QDialog(parent),
                              ui(new Ui::FtpDialog)
                              {
                              ui->setupUi(this);
                              connect(ui->connectButton, SIGNAL(clicked()), this, SLOT(connectClicked()));
                              connect(&ftp,SIGNAL(commandFinished(int,bool)), this, SLOT(ftpFinished(int,bool)));

                              ui->disconnectButton->setEnabled(false);
                              ui->cdButton->setEnabled(false);
                              ui->upButton->setEnabled(false);
                              ui->getButton->setEnabled(false);
                              

                              }

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

                              void FtpDialog::connectClicked()
                              {
                              ui->connectButton->setEnabled(false);

                               ftp.connectToHost("ftp.trolltech.com");
                               ui->statusLabel->setText(tr("Connecting to host..."));
                              

                              }

                              void FtpDialog::ftpFinished(int request, bool error)
                              {
                              // Handle errors depending on the command caussing it
                              qDebug()<<ftp.currentCommand();
                              if(error)
                              {
                              switch(ftp.currentCommand())
                              {
                              case QFtp::ConnectToHost:
                              QMessageBox::warning(this, tr("Error"), tr("Failed to connect to host."));
                              ui->connectButton->setEnabled(true);

                                      break;
                                  case QFtp::Login:
                                      QMessageBox::warning(this, tr("Error"), tr("Failed to login."));
                                      ui->connectButton->setEnabled(true);
                              
                                      break;
                              
                                  case QFtp::List:
                                      QMessageBox::warning(this, tr("Error"),
                                                           tr("Failed to get file list.\nClosing connection"));
                                      ftp.close();
                              
                                      break;
                              
                                  }
                              
                                  ui->statusLabel->setText(tr("Ready."));
                              

                              }
                              // React to the current command and issue
                              // more commands or update the user interface
                              else
                              {
                              switch(ftp.currentCommand())
                              {
                              case QFtp::ConnectToHost:
                              ftp.login();

                                      break;
                                  case QFtp::Login:
                                      getFileList();
                              
                                      break;
                              
                                  case QFtp::Close:
                                      ui->connectButton->setEnabled(true);
                                     // getFileList();
                              
                                      break;
                                  case QFtp::List:
                                      ui->disconnectButton->setEnabled(true);
                                      ui->upButton->setEnabled(true);
                                      ui->statusLabel->setText(tr("Ready."));
                              
                                      break;
                              
                                  }
                              }
                              

                              }

                              void FtpDialog::getFileList()
                              {

                              }

                              J.HilkJ Offline
                              J.HilkJ Offline
                              J.Hilk
                              Moderators
                              wrote on last edited by
                              #27

                              @walter-j

                              keep in mind that QFftp has not been updated for a very long time and therefore may not automatically support your target FTp-Servers protocolls.

                              I run into this, when one of my old projects worked fine with the old FTP-Server but failed completely with the new one.


                              Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                              Q: What's that?
                              A: It's blue light.
                              Q: What does it do?
                              A: It turns blue.

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                              • W walter-j

                                But in the book they used commandFinished(int, bool) signal.

                                jsulmJ Offline
                                jsulmJ Offline
                                jsulm
                                Lifetime Qt Champion
                                wrote on last edited by
                                #28

                                @walter-j I did not say you should not use commandFinished, just add another slot to see whether you get any state changes.

                                https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                • VRoninV Offline
                                  VRoninV Offline
                                  VRonin
                                  wrote on last edited by
                                  #29

                                  You need an external library and I don't feel to recommend QFtp as it's not maintained anymore. libCURL is probably the standard library in the C/C++ world (and probably beyond). You can use a cpp wrapper like curlpp if you don't like the aftertaste C leaves in your mouth.

                                  This example (source) will download the list of files from ftp://ftp.funet.fi/ and save it in a file called ftp-list

                                  #include <stdio.h>
                                   
                                  #include <curl/curl.h>
                                   
                                  static size_t
                                  write_response(void *ptr, size_t size, size_t nmemb, void *data)
                                  {
                                    FILE *writehere = (FILE *)data;
                                    return fwrite(ptr, size, nmemb, writehere);
                                  }
                                   
                                  #define FTPBODY "ftp-list"
                                  #define FTPHEADERS "ftp-responses"
                                   
                                  int main(void)
                                  {
                                    CURL *curl;
                                    CURLcode res;
                                    FILE *ftpfile;
                                    FILE *respfile;
                                   
                                    /* local file name to store the file as */ 
                                    ftpfile = fopen(FTPBODY, "wb"); /* b is binary, needed on win32 */ 
                                   
                                    /* local file name to store the FTP server's response lines in */ 
                                    respfile = fopen(FTPHEADERS, "wb"); /* b is binary, needed on win32 */ 
                                   
                                    curl = curl_easy_init();
                                    if(curl) {
                                      /* Get a file listing from sunet */ 
                                      curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.funet.fi/");
                                      curl_easy_setopt(curl, CURLOPT_WRITEDATA, ftpfile);
                                      /* If you intend to use this on windows with a libcurl DLL, you must use
                                         CURLOPT_WRITEFUNCTION as well */ 
                                      curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, write_response);
                                      curl_easy_setopt(curl, CURLOPT_HEADERDATA, respfile);
                                      res = curl_easy_perform(curl);
                                      /* Check for errors */ 
                                      if(res != CURLE_OK)
                                        fprintf(stderr, "curl_easy_perform() failed: %s\n",
                                                curl_easy_strerror(res));
                                   
                                      /* always cleanup */ 
                                      curl_easy_cleanup(curl);
                                    }
                                   
                                    fclose(ftpfile); /* close the local file */ 
                                    fclose(respfile); /* close the response file */ 
                                   
                                    return 0;
                                  }
                                  

                                  "La mort n'est rien, mais vivre vaincu et sans gloire, c'est mourir tous les jours"
                                  ~Napoleon Bonaparte

                                  On a crusade to banish setIndexWidget() from the holy land of Qt

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                                  • W Offline
                                    W Offline
                                    walter-j
                                    wrote on last edited by
                                    #30

                                    stateChanged solved the problem.

                                    Thank you guys

                                    JK

                                    Josephat Kabitshwa

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                                    • SGaistS Offline
                                      SGaistS Offline
                                      SGaist
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #31

                                      You're welcome !

                                      Since you have it working now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

                                      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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                                      • W Offline
                                        W Offline
                                        walter-j
                                        wrote on last edited by
                                        #32

                                        i have searched for it . i didn't find

                                        Josephat Kabitshwa

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                                        • SGaistS Offline
                                          SGaistS Offline
                                          SGaist
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #33

                                          Do you mean the "Topic Tools" button ?

                                          There's one just under your original post or at the bottom of the page under the last post.

                                          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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