Get the html's source from a https url with QNetworkAccessManager

An other french

Hello,
Now, all web's cite is secured with https protocol.
For a personal automatic's search on the web, i need to get some areas under a html code.
So, with no secured connection, no problemo.
But, the best answers aren't in these ones.

A short code to explain is better than my poor english.

#include <QWidget>
#include <QNetworkAccessManager>
#include <QNetworkReply>

    QNetworkAccessManager *manager;
 
manager = new QNetworkAccessManager(this);
 
    QNetworkRequest request; 
request.setSslConfiguration(QSslConfiguration::defaultConfiguration());
request.setUrl(QUrl("https://forum.qt.io/topic/95745/get-the-html-s-source-from-a-https-url-with-qnetworkaccessmanager"));
request.setRawHeader("User-Agent", "MyOwnBrowser 1.0");
 
    QNetworkReply *response;
 
response = manager->get(request);
connect(response, &QNetworkReply::finished,this,&Form::getResult );
 
void form2::getResult() {
qDebug() << "https://forum.qt.io/category/10/general-and-desktop";
qDebug() << "html "<< response->readAll();
ui->label_2->setText("one think done");
}

In some discussions, i can read about SSL's configuration and it said to add it under the compiler command's line. I put mine.

qmake.exe "xyz.pro" -spec win32-g++ "CONFIG+=debug" "CONFIG+=qml_debug" && E:/Qt/Tools/mingw530_32/bin/mingw32-make.exe qmake_all

No idea how to install the Ssl configuration in the mingw32 compiler if it needed.

I earded about redirection which it not applied in this code.

Some helps Please.
Thanks for reading.

Ps: surpise works with https://forum.qt.io
So try with request.setUrl(QUrl("https://www.google.fr/search?q=qt+ssl+configuration"));

dheerendra

You don't have do anything for HTTPS. You should just use the HTTPS url and it should work fine.

What is your real issue ? What is not working ?

An other french

see my Debug window

Starting xxxx.exe...
libpng warning: iCCP: known incorrect sRGB profile
url  QUrl("https://www.google.fr/search?q=qt+ssl+configuration&oq=Ssl+Configuration+qt")
html  ""             //   from  response->readAll();
redirect  QUrl("")   //   from qDebug() << "redirect "<< response->attribute(QNetworkRequest::RedirectionTargetAttribute).toUrl();
one think done

mpergand

@An-other-french said in Get the html's source from a https url with QNetworkAccessManager:

QNetworkReply *response;

response = manager->get(request);

try:
reponse->ignoreSslErrors();

An other french

No way to show the html code from a google search
insert libeay32.dll and ssleay32.dll in the folder "Qt\5.9.4\mingw53_32\bin"

An other french

http://doc.qt.io/qt-5/qnetworkreply.html#ignoreSslErrors-1

void Form::on_pushButton_4_clicked()
{
manager = new QNetworkAccessManager(this);
QNetworkRequest request;
request.setSslConfiguration(QSslConfiguration::defaultConfiguration());
QList<QSslCertificate> cert = QSslCertificate::fromPath(QLatin1String("server-certificate.pem"));
QSslError error(QSslError::SelfSignedCertificate, cert.at(0));
QList<QSslError> expectedSslErrors;
expectedSslErrors.append(error);
request.setUrl(QUrl("https://www.google.fr/search?q=qt+ssl+configuration&oq=Ssl+Configuration+qt"));
response = manager->get(request);
connect(response, &QNetworkReply::finished,this,&Form::getResult2 );
response->ignoreSslErrors(expectedSslErrors);
}

an error :

ASSERT failure in QList<T>::at: "index out of range", file E:\Qt\5.9.4\mingw53_32\include/QtCore/qlist.h, line 541
C:/.../Test QT Projet/build-test2-Desktop_Qt_5_9_4_MinGW_32bit-Debug/debug/test2.exe exited with code 3

Christian Ehrlicher

@An-other-french said in Get the html's source from a https url with QNetworkAccessManager:

QList<QSslCertificate> cert = QSslCertificate::fromPath(QLatin1String("server-certificate.pem"));

You should check if there is an entry before accessing it...