My cookieJar class implementation work good, with any web site in http (google etc...) but with an https request in don't received any cookie. Normally i have to received cookie with https://cas.univ-ubs.fr/login in GET and POST request. I was using readAll for the id, just for that.

Qt Code: 
  1. // CookieJar class
  2. #include "Cookies.h"
  3.  
  4. QList<QNetworkCookie> CookieJar::cookiesForUrl ( const QUrl & url ) const
  5. {
  6.     return QNetworkCookieJar::cookiesForUrl(url);
  7. }
  8.  
  9. bool CookieJar::setCookiesFromUrl ( const QList<QNetworkCookie> & cookieList, const QUrl & url )
  10. {
  11.     return QNetworkCookieJar::setCookiesFromUrl(cookieList, url);
  12. }
  13.  
  14. CookieJar::CookieJar(QObject *parent)
  15.     :QNetworkCookieJar(parent)
  16. {
  17.     QFile cookieFile("Cookies.txt");
  18.     if (cookieFile.exists() && cookieFile.open(QIODevice::ReadOnly) )
  19.     {
  20.         QList<QNetworkCookie> list;
  21.         QByteArray line;
  22.         while(!(line = cookieFile.readLine()).isNull())
  23.         {
  24.             list.append(QNetworkCookie::parseCookies(line));
  25.         }
  26.         setAllCookies(list);
  27.     }
  28. }
  29.  
  30. CookieJar::~CookieJar()
  31. {
  32.     QFile cookieFile("Cookies.txt");
  33.     if (cookieFile.open(QIODevice::WriteOnly))
  34.     {
  35.         QTextStream out(&cookieFile);
  36.         foreach(const QNetworkCookie & cookie, allCookies())
  37.         {
  38. 			if (!cookie.isSessionCookie())
  39. 			{
  40.             	out << cookie.toRawForm() << endl;
  41. 				qDebug() << "write **********COOKIE******************* ";
  42. 			}
  43.         }
  44.     }
  45. }
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Qt Code: 
  1. // My request code
  2. void FenPrincipale::takeId()
  3. {
  4. 	QNetworkAccessManager *m = new QNetworkAccessManager();
  5.         // Set the cookieJar
  6.         m->setCookieJar(new CookieJar(this));
  7. 	QNetworkRequest requete(QUrl("https://cas.univ-ubs.fr/login"));
  8.  
  9.         // I make a first GET request.
  10. 	QNetworkReply *r = m->get(requete);
  11. 	qDebug() << "takeId";
  12.  
  13. 	connect(r, SIGNAL(finished()), this, SLOT(takeCookies())); 
  14. 	connect(r, SIGNAL(error(QNetworkReply::NetworkError)), this,
  15. 			 SLOT(messageErreur(QNetworkReply::NetworkError)));
  16.  
  17. }
  18.  
  19. void FenPrincipale::takeCookies()
  20. {
  21. 	QNetworkReply *reply = static_cast<QNetworkReply*>(sender());
  22. 	QNetworkAccessManager *m = reply->manager();
  23.  
  24. 	// I recover the id
  25. 	QString source = reply->readAll();
  26. 	QString lt = source.section("\"",119,119);
  27. 	source = source.section("\"",41,41);
  28.  
  29.         // Build url contents
  30. 	QUrl postData;
  31. 	postData.addQueryItem("username","");
  32. 	postData.addQueryItem("password",var2_Edit->text());
  33. 	postData.addQueryItem("warn", "true");
  34.         // I make the id in the URL
  35. 	postData.addQueryItem("lt", lt);
  36. 	postData.addQueryItem("_eventId", "submit");
  37. 	postData.addQueryItem("submit", "SE CONNECTER");
  38.  
  39. 	QNetworkRequest requete(QUrl("https://cas.univ-ubs.fr/login"));
  40. 	requete.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
  41.  
  42.         // I make the second request
  43.         QNetworkReply *r = m->post(requete, postData.encodedQuery());
  44.  
  45.  
  46. 	connect(r, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(messageErreur(QNetworkReply::NetworkError)));
  47. 	connect(r, SIGNAL(finished()), this, SLOT(takeLink())); 
  48.  
  49. 	connect(r, SIGNAL(sslErrors(const QList<QSslError>&)), this, SLOT(ErreurSsl(const QList<QSslError>&)));
  50. }
  51.  
  52. void FenPrincipale::takeLink()
  53. {
  54. 	QNetworkReply *reply = static_cast<QNetworkReply*>(sender());
  55. 	QNetworkAccessManager *m = reply->manager();
  56.  
  57. // ----------> I want to have access to protect file in the web site with my cookie
  58. }
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}