QNetworkRequest https problem connect missing reply

[Linux5445]

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.

// CookieJar class
#include "Cookies.h"
 
QList<QNetworkCookie> CookieJar::cookiesForUrl ( const QUrl & url ) const
{
    return QNetworkCookieJar::cookiesForUrl(url);
}
 
bool CookieJar::setCookiesFromUrl ( const QList<QNetworkCookie> & cookieList, const QUrl & url )
{
    return QNetworkCookieJar::setCookiesFromUrl(cookieList, url);
}
 
CookieJar::CookieJar(QObject *parent)
    :QNetworkCookieJar(parent)
{
    QFile cookieFile("Cookies.txt");
    if (cookieFile.exists() && cookieFile.open(QIODevice::ReadOnly) )
    {
        QList<QNetworkCookie> list;
        QByteArray line;
        while(!(line = cookieFile.readLine()).isNull())
        {
            list.append(QNetworkCookie::parseCookies(line));
        }
        setAllCookies(list);
    }
}
 
CookieJar::~CookieJar()
{
    QFile cookieFile("Cookies.txt");
    if (cookieFile.open(QIODevice::WriteOnly))
    {
        QTextStream out(&cookieFile);
        foreach(const QNetworkCookie & cookie, allCookies())
        {
			if (!cookie.isSessionCookie())
			{
            	out << cookie.toRawForm() << endl;
				qDebug() << "write **********COOKIE******************* ";
			}
        }
    }
}

// CookieJar class
#include "Cookies.h"

QList<QNetworkCookie> CookieJar::cookiesForUrl ( const QUrl & url ) const
{
    return QNetworkCookieJar::cookiesForUrl(url);
}

bool CookieJar::setCookiesFromUrl ( const QList<QNetworkCookie> & cookieList, const QUrl & url )
{
    return QNetworkCookieJar::setCookiesFromUrl(cookieList, url);
}

CookieJar::CookieJar(QObject *parent)
    :QNetworkCookieJar(parent)
{
    QFile cookieFile("Cookies.txt");
    if (cookieFile.exists() && cookieFile.open(QIODevice::ReadOnly) )
    {
        QList<QNetworkCookie> list;
        QByteArray line;
        while(!(line = cookieFile.readLine()).isNull())
        {
            list.append(QNetworkCookie::parseCookies(line));
        }
        setAllCookies(list);
    }
}

CookieJar::~CookieJar()
{
    QFile cookieFile("Cookies.txt");
    if (cookieFile.open(QIODevice::WriteOnly))
    {
        QTextStream out(&cookieFile);
        foreach(const QNetworkCookie & cookie, allCookies())
        {
			if (!cookie.isSessionCookie())
			{
            	out << cookie.toRawForm() << endl;
				qDebug() << "write **********COOKIE******************* ";
			}
        }
    }
}

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// My request code
void FenPrincipale::takeId()
{
	QNetworkAccessManager *m = new QNetworkAccessManager();
        // Set the cookieJar
        m->setCookieJar(new CookieJar(this));
	QNetworkRequest requete(QUrl("https://cas.univ-ubs.fr/login"));
 
        // I make a first GET request.
	QNetworkReply *r = m->get(requete);
	qDebug() << "takeId";
 
	connect(r, SIGNAL(finished()), this, SLOT(takeCookies())); 
	connect(r, SIGNAL(error(QNetworkReply::NetworkError)), this,
			 SLOT(messageErreur(QNetworkReply::NetworkError)));
 
}
 
void FenPrincipale::takeCookies()
{
	QNetworkReply *reply = static_cast<QNetworkReply*>(sender());
	QNetworkAccessManager *m = reply->manager();
 
	// I recover the id
	QString source = reply->readAll();
	QString lt = source.section("\"",119,119);
	source = source.section("\"",41,41);
 
        // Build url contents
	QUrl postData;
	postData.addQueryItem("username","");
	postData.addQueryItem("password",var2_Edit->text());
	postData.addQueryItem("warn", "true");
        // I make the id in the URL
	postData.addQueryItem("lt", lt);
	postData.addQueryItem("_eventId", "submit");
	postData.addQueryItem("submit", "SE CONNECTER");
 
	QNetworkRequest requete(QUrl("https://cas.univ-ubs.fr/login"));
	requete.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
 
        // I make the second request
        QNetworkReply *r = m->post(requete, postData.encodedQuery());
 
 
	connect(r, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(messageErreur(QNetworkReply::NetworkError)));
	connect(r, SIGNAL(finished()), this, SLOT(takeLink())); 
 
	connect(r, SIGNAL(sslErrors(const QList<QSslError>&)), this, SLOT(ErreurSsl(const QList<QSslError>&)));
}
 
void FenPrincipale::takeLink()
{
	QNetworkReply *reply = static_cast<QNetworkReply*>(sender());
	QNetworkAccessManager *m = reply->manager();
 
// ----------> I want to have access to protect file in the web site with my cookie
}

// My request code
void FenPrincipale::takeId()
{
	QNetworkAccessManager *m = new QNetworkAccessManager();
        // Set the cookieJar
        m->setCookieJar(new CookieJar(this));
	QNetworkRequest requete(QUrl("https://cas.univ-ubs.fr/login"));
 
        // I make a first GET request.
	QNetworkReply *r = m->get(requete);
	qDebug() << "takeId";
 
	connect(r, SIGNAL(finished()), this, SLOT(takeCookies())); 
	connect(r, SIGNAL(error(QNetworkReply::NetworkError)), this,
			 SLOT(messageErreur(QNetworkReply::NetworkError)));
 
}
 
void FenPrincipale::takeCookies()
{
	QNetworkReply *reply = static_cast<QNetworkReply*>(sender());
	QNetworkAccessManager *m = reply->manager();
 
	// I recover the id
	QString source = reply->readAll();
	QString lt = source.section("\"",119,119);
	source = source.section("\"",41,41);
 
        // Build url contents
	QUrl postData;
	postData.addQueryItem("username","");
	postData.addQueryItem("password",var2_Edit->text());
	postData.addQueryItem("warn", "true");
        // I make the id in the URL
	postData.addQueryItem("lt", lt);
	postData.addQueryItem("_eventId", "submit");
	postData.addQueryItem("submit", "SE CONNECTER");
 
	QNetworkRequest requete(QUrl("https://cas.univ-ubs.fr/login"));
	requete.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-www-form-urlencoded");
 
        // I make the second request
        QNetworkReply *r = m->post(requete, postData.encodedQuery());
 
 
	connect(r, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(messageErreur(QNetworkReply::NetworkError)));
	connect(r, SIGNAL(finished()), this, SLOT(takeLink())); 
 
	connect(r, SIGNAL(sslErrors(const QList<QSslError>&)), this, SLOT(ErreurSsl(const QList<QSslError>&)));
}

void FenPrincipale::takeLink()
{
	QNetworkReply *reply = static_cast<QNetworkReply*>(sender());
	QNetworkAccessManager *m = reply->manager();

// ----------> I want to have access to protect file in the web site with my cookie
}

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}

[wysota]

Please, understand it - the result returned by readAll() will not contain the part of the conversation with the cookie. Your "lt" and "source" variables will not contain parts of the cookie.

With an ssl connection you don't get anything probably because the site returns an SSL error (handshake failed due to self signed certificate) which you do not handle correctly (see docs for QNetworkReply::sslErrors() signal).

[Linux5445]

I know, I just want to have the id like this in the web site:
<input type="hidden" name="lt" value="_cC02BDB12-D1D9-7155-261D-9D1174D68BD3_k4E4C0CC3-872E-EA91-456C-A29E1E0B4CF5" />

I was using this method for the sslError but i don't have any error:

void FenPrincipale::ErreurSsl(const QList<QSslError> & errors) 
{
	qDebug () << "errorSSl";
	for (int i=0; i < errors.length(); i++)
	{
		qDebug() << "errorSSl = " << errors[i].errorString();
	}
}

void FenPrincipale::ErreurSsl(const QList<QSslError> & errors) 
{
	qDebug () << "errorSSl";
	for (int i=0; i < errors.length(); i++)
	{
		qDebug() << "errorSSl = " << errors[i].errorString();
	}
}

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Why i don't have any SSL error ? why the web site return nothing (no redirection) ?

[wysota]

I know, I just want to have the id like this in the web site:
<input type="hidden" name="lt" value="_cC02BDB12-D1D9-7155-261D-9D1174D68BD3_k4E4C0CC3-872E-EA91-456C-A29E1E0B4CF5" />

Doing it with QString::section() is a bad idea - if the website contents change it is likely you method will stop working. Better use regular expressions (QRegExp) for getting the id.

I was using this method for the sslError but i don't have any error:

Bearing the fact the certificate of the website is self-signed, you should be getting one error. Does the finished() signal for the network reply even get emitted?

[Linux5445]

Yes is true for the QString section.

When i'm try connected until build a cookie i have a redirection with the cookie in the url.
https://cas.univ-ubs.fr/login;jsessionid=EC0A6DAAB7A739B99B00B17200346C84" .
When i don't used the cookie i just have a redirection.

In python i just used (HTTPCookieProcessor)

def __init__(self):
		self.CJ = CookieJar()
		self.connection = build_opener(HTTPCookieProcessor(self.CJ))
 
	def getConnection(self):
		try:
			u = self.connection.open("https://cas.univ-ubs.fr/login").read()
			f = '<input type="hidden" name="lt" value="'
			l = u.rfind(f)
			r = u.rfind('" />\n\t\t\t\t\t\t<input type="hidden" name="_eventId"')
			data = u[l+len(f):r]
			params = urlencode({
				"username":self.username,
				"password":self.password,
				"lt":data,
				"_eventId":"submit",
				"submit":"SE CONNECTER"
			})
 
			self.connection.open("https://cas.univ-ubs.fr/login", params)

def __init__(self):
		self.CJ = CookieJar()
		self.connection = build_opener(HTTPCookieProcessor(self.CJ))

	def getConnection(self):
		try:
			u = self.connection.open("https://cas.univ-ubs.fr/login").read()
			f = '<input type="hidden" name="lt" value="'
			l = u.rfind(f)
			r = u.rfind('" />\n\t\t\t\t\t\t<input type="hidden" name="_eventId"')
			data = u[l+len(f):r]
			params = urlencode({
				"username":self.username,
				"password":self.password,
				"lt":data,
				"_eventId":"submit",
				"submit":"SE CONNECTER"
			})
				
			self.connection.open("https://cas.univ-ubs.fr/login", params)

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I can't translate perfectly in C++ with Qt but i think is possible to work.