"Connection closed/refused" error When I try to send Http Get Request using "QNetworkAccessManager"

[Chaitra G]

Re: "Connection closed" When using QNetworkAccessManager and QTcpServer

[jsulm]

@Chaitra-G Don't you think you should provide more information?!

[Chaitra G]

since I am first time user its not allow me to post my details immediately.
please find the details here

#include <QCoreApplication>
#include <QDebug>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QUrl>
#include <QUrlQuery>
#include <main.h>
#include <iostream>
#include <QNetworkProxy>

void sendGetRequest();

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
sendGetRequest();
return a.exec();
}

//GET Function
void sendGetRequest()
{
QNetworkAccessManager *mgr = new QNetworkAccessManager();

QString url1 = "http://15.77.38.184/";
QString url2 = "http://15.77.38.184/cgi-bin/handleJson/shrmem";

 QNetworkRequest requestInfo;

  requestInfo.setHeader(QNetworkRequest::UserAgentHeader, "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36//");
  requestInfo.setRawHeader("Accept","text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9");
  requestInfo.setRawHeader("Accept-Encoding","gzip,deflate");
  requestInfo.setRawHeader("Cache-Control","max-age=0");
  requestInfo.setRawHeader("Accept-Launguage","en-US,*");
   requestInfo.setUrl(QUrl(url2));


  QNetworkProxy proxy;
  proxy.setType(QNetworkProxy::HttpProxy);
  proxy.setHostName("127.0.0.1");
  proxy.setPort(8080);
  mgr->setProxy(proxy);
  QNetworkProxy::setApplicationProxy(proxy);
  QEventLoop eventLoop;
  QNetworkReply *reply = mgr->get(requestInfo);

QObject::connect(reply, SIGNAL(finished()), &eventLoop, SLOT(quit()));
eventLoop.exec();

if(reply->error() == QNetworkReply::NoError)
{
    qDebug() << "request http No error";
}
else
{
    qDebug() << "request http handle error here";
    QVariant statusCodev = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
    qDebug("request http found error...: %d %d \n", statusCodev.toInt(), (int)reply->error());
    qDebug(qPrintable(reply->errorString()));
     qDebug() << reply->error();
}

QByteArray responseByte = reply->readAll();
qDebug() << responseByte;

}

This is my code. I am getting empty data everytime in response and connection closed error not able to find the content data. Please suggest me the solution for this?

even I tried to setProxy not working for me

[SGaist]

Hi,

You should connect the error related signals from QNetworkAccessManager.

Also, are you sure that the request you send is valid ?

[Chaitra G]

@SGaist Yes Same request is working with RESTclient and wireshak even in browser I am able to see the data But using qt its receiving empty data.

"You should connect the error related signals from QNetworkAccessManager." to this

QObject::connect(reply, SIGNAL(finished()), &eventLoop, SLOT(quit()));

As I understood i am just sending eventloop until reply->finished signal comes then i will quit the loop

using reply->readAll i can get the data.

Please correct me if i doing anything wrong here.

[jsulm]

@Chaitra-G said in "Connection closed/refused" error When I try to send Http Get Request using "QNetworkAccessManager":

Please correct me if i doing anything wrong here.

Can you please connect error related signals to slots like @SGaist suggested and see whether you get any errors?