QNetworkAccessManager, adding proxy server support

blaroche

Hello,
I am subclassing QNetworkAccessManager to create a base class for all my webservice communictions.
Everything works as expected, until i try to add proxy server support. It works great without authentication, but a major problem comes up when I try to add support for authentication. I've verified the proxy server with auth using FireFox.
I'm using Qt 4.8.2. I'm targetting embedded linux, but i get the same result testing on linux desktop.

Proxy support gets configured in NetworkAccessManager::configureProxy(), the the slot NetworkAccessManager::proxyAuthenticationRequired(...) gets called to provide authentication.

the proxyAuthenticationRequired slot just gets called repeatedly.

And i just the something like the following over and over.
"
NetworkAccessManager::proxyAuthenticationRequired -- called
NetworkAccessManager::proxyAuthenticationRequired requesting realm: proxy
QNetworkAccessCache::addEntry: overriding active cache entry 'auth:proxy-http://user@10.255.170.140:3128#proxy'
QNetworkAccessCache::addEntry: overriding active cache entry 'auth:proxy-http://user@10.255.170.140:3128'
QNetworkAccessCache::addEntry: overriding active cache entry 'auth:proxy-http://10.255.170.140:3128'
"

I've found the below related issue, but they did not lead helpful results.
https://bugreports.qt-project.org/browse/QTBUG-16728
https://bugreports.qt-project.org/browse/QTBUG-14850

I've also tried applying patches from here:
https://bugreports.qt-project.org/browse/QTBUG-15472
recompiled everything, still see the same results.

I was hoping someone would help shed some light on this issue. Perhaps i'm doing something wrong, or if this looks like a bug within Qt.

I Appreciate and guidance.

Edit:: it appears my post is too big including code. I'll post code in replies.

blaroche

networkaccessmanager.h
@
#ifndef NETWORKACCESSMANAGER_H
#define NETWORKACCESSMANAGER_H

#include <QObject>
#include <QNetworkAccessManager>
#include <QtNetwork>
#include <QUrl>

class QNetworkReply;
class QNetworkRequest;

class NetworkAccessManager : public QNetworkAccessManager
{
Q_OBJECT
public:
//NetworkAccessManager(QObject *parent = 0);
NetworkAccessManager();
~NetworkAccessManager();
void setContent(const QString &content);
void setUrl(const QString &url);
void printResult() const;
public slots:
void configureProxy();
private slots:
void cancelRequest();
void httpFinished();
void httpReadyRead();
void httpError(QNetworkReply::NetworkError error);
void sslError(const QList<QSslError> &errorList);
void authenticationRequired(QNetworkReply *reply, QAuthenticator *auth);
virtual void proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *auth);
protected:
void init();
void startRequest();

bool httpRequestAborted;
bool error;
QString result;

private:
QNetworkReply *reply;
QNetworkRequest *request;
QEventLoop *eventloop;

QUrl url;
QString result;
QByteArray content;
QString proxyHost;
QString proxyPort;
QString proxyUsername;
QString proxyPassword;

};

#endif // NETWORKACCESSMANAGER_H
@

blaroche

networkaccessmanager.cpp
@
// qt
#include <QDebug>

// local
#include "networkaccessmanager.h"
#include "sysAdmin/databasemanager.h"

//NetworkAccessManager::NetworkAccessManager(QObject parent)
// : QNetworkAccessManager(parent)
NetworkAccessManager::NetworkAccessManager()
{
error = false;
httpRequestAborted = false;
init();
configureProxy();
connect(this, SIGNAL(authenticationRequired(QNetworkReply,QAuthenticator*)),this, SLOT(authenticationRequired(QNetworkReply*,QAuthenticator*)));
connect(this, SIGNAL(proxyAuthenticationRequired(QNetworkProxy,QAuthenticator*)),this, SLOT(proxyAuthenticationRequired(QNetworkProxy,QAuthenticator*)));
}

NetworkAccessManager::~NetworkAccessManager()
{
}

void NetworkAccessManager::setContent(const QString &content)
{
this->content.clear();
this->content.append(content);
}

void NetworkAccessManager::setUrl(const QString &url)
{
this->url = url;
}

void NetworkAccessManager::printResult() const
{
qDebug() << "Results: " << result;
}

// public slots
void NetworkAccessManager::configureProxy()
{
DatabaseManager db;
QNetworkProxy proxy;
//QNetworkProxy proxy(QNetworkProxy::HttpProxy);
//QNetworkProxy *proxy = new QNetworkProxy();
if(db.getProxyServerEnabled() ) {
proxy.setType(QNetworkProxy::HttpProxy);
//proxy.setType(QNetworkProxy::HttpCachingProxy);
//proxy.setCapabilities(QNetworkProxy::CachingCapability | QNetworkProxy::HostNameLookupCapability);
//proxy.setCapabilities(QNetworkProxy::HostNameLookupCapability);
//proxy = QNetworkProxy::HttpProxy;
//proxy.setType(QNetworkProxy::HttpProxy);
//proxy.setType(QNetworkProxy::Socks5Proxy);
//proxy.setType(QNetworkProxy::HttpCachingProxy);
//proxy.setType(QNetworkProxy::DefaultProxy);

    proxyHost = db.getProxyServerHost();
    proxyPort = db.getProxyServerPort();
    proxyUsername = db.getProxyServerUser();
    proxyPassword = db.getProxyServerPassword();

    proxy.setHostName(proxyHost);
    proxy.setPort(proxyPort.toInt());
    proxy.setUser(proxyUsername);
    proxy.setPassword(proxyPassword);
}
else {
    proxy.setType(QNetworkProxy::NoProxy);
}
//QNetworkProxy::setApplicationProxy(proxy);
setProxy(proxy);

}

// private slots
void NetworkAccessManager::cancelRequest()
{
reply->abort();
httpRequestAborted = true;
}

void NetworkAccessManager::httpFinished()
{
if(httpRequestAborted)
error = true;

QVariant statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);

if(statusCode.toString() != "200") 
    error = true;

if(reply->error()) 
    error = true;

eventloop->exit();
reply->deleteLater();
delete eventloop;
delete request;

}

void NetworkAccessManager::httpReadyRead()
{
result += reply->readAll();
}

void NetworkAccessManager::httpError(QNetworkReply::NetworkError error )
{
this->error = true;
}

void NetworkAccessManager::sslError(const QList<QSslError> &errorList)
{
Q_UNUSED(errorList);
reply->ignoreSslErrors();
}

void NetworkAccessManager::authenticationRequired(QNetworkReply *reply, QAuthenticator *auth)
{
Q_UNUSED(reply);
Q_UNUSED(auth);
}

void NetworkAccessManager::proxyAuthenticationRequired(const QNetworkProxy &proxy, QAuthenticator *auth)
{
//Q_UNUSED(proxy);
//Q_UNUSED(auth);
qDebug() << "NetworkAccessManager::proxyAuthenticationRequired -- called";
qDebug() << "NetworkAccessManager::proxyAuthenticationRequired requesting realm:" << auth->realm();

auth->setUser(proxyUsername);
auth->setPassword(proxyPassword);

//QNetworkProxy p(proxy);
//p.setType(QNetworkProxy::HttpProxy);
//p.setHostName(proxyHost);
//p.setPort(proxyPort.toInt());
//p.setUser(proxyUsername);
//p.setPassword(proxyPassword);
//QNetworkProxy::setApplicationProxy(p);

}

// private
void NetworkAccessManager::init()
{
}

void NetworkAccessManager::startRequest()
{
result.clear();
error = false;
httpRequestAborted = false;

request = new QNetworkRequest();
request->setUrl(url);
request->setRawHeader("Content-Type", "text/xml");
//request->setRawHeader(QString("Content-Length").toAscii(), QString::number(content.length()).toAscii());

QSslConfiguration sslConfig = request->sslConfiguration();
sslConfig.setPeerVerifyMode(QSslSocket::AutoVerifyPeer);
sslConfig.setProtocol(QSsl::SslV3);

request->setSslConfiguration(sslConfig);

reply = this->post(*request, content);

QTimer timer;
timer.setSingleShot(true);
eventloop = new QEventLoop();
timer.start(30000);
connect(reply, SIGNAL(finished()), this, SLOT(httpFinished()));
connect(reply, SIGNAL(readyRead()), this, SLOT(httpReadyRead()));
connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(httpError(QNetworkReply::NetworkError)));
connect(reply, SIGNAL(sslErrors(const QList<QSslError> &)), this, SLOT(sslError(const QList<QSslError> &)));
connect(&timer, SIGNAL(timeout()), this, SLOT(cancelRequest()));
eventloop->exec&#40;&#41;;

}
@

alan1002

I am with almost same problem , the difference for me is before there are this msg too :

QSslSocket: cannot resolve SSLv2_client_method
QSslSocket: cannot resolve SSLv2_server_method
***frmBuyIt : isSSLSupported= true

and after :
QNetworkAccessCache::addEntry: overriding active cache entry 'auth:proxy-http://user@proxy:port
and repet forever

I search a lot but don't find solution

alan1002

I am with almost same problem , the difference for me is before there are this msg too :

QSslSocket: cannot resolve SSLv2_client_method
QSslSocket: cannot resolve SSLv2_server_method
***frmBuyIt : isSSLSupported= true

and after :
QNetworkAccessCache::addEntry: overriding active cache entry 'auth:proxy-http://user@proxy:port
and repet forever

I search a lot but don't find solution