QNetworkAccessManager Error Code 99; Only on Some Systems...
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Hello,
When using QNetworkAccessManager I get a strange error that only occurs on some systems but not others.
See below for the code. The test below connects to an SSL-based site.
I have OpenSSL DLLs (libeay32.dll and ssleay32.dll) on the client systems in the same directory as my application but the error still occurs.
The error code is (99) - Unknown Network Error.
What causes this error on some systems but not others?
What can I do to fix?
Thank you for your time.
In the constructor of the application:
@
MainNetConnector = new QNetworkAccessManager(this);
@The function that starts the test
@void QTBasicWidget::performNetworkTest() {
QMessageBox::StandardButton RequestNetworkTest;
RequestNetworkTest = QMessageBox::information(this, "Would you like to initiate a network test?",
"Would you like to perform a network test?\n\nThe application will test the network for connectivity to and from the licensing server specified.\n\nResults will be displayed in the 'Log' tab.",
QMessageBox::Yes | QMessageBox::No);QNetworkRequest req;
QByteArray postData;
QNetworkReply* reply;
switch (RequestNetworkTest) {
case QMessageBox::Yes:
LoggingWidget->logText(tr("Beginning the network test."));
if (UseSecuredURL) {
req.setUrl(QUrl(SecureURL + "testconnection.php"));
LoggingWidget->logText(tr("Connecting to secure URL: ") + SecureURL + tr("testconnection.php"));
}
else {req.setUrl(QUrl(UnsecureURL + "testconnection.php"));
LoggingWidget->logText(tr("Connecting to unsecure URL: ") + UnsecureURL + tr("testconnection.php"));
}
MainNetConnector->setCookieJar(new QNetworkCookieJar(MainNetConnector));
LoggingWidget->logText(tr("Cookie jar prepared for data to send."));
reply = MainNetConnector->post(req, postData);
LoggingWidget->logText(tr("Data sent."));
connect(reply, &QNetworkReply::finished, this, &QTBasicWidget::processTestResults);
connect(reply, SIGNAL(error(QNetworkReply::NetworkError)),
this, SLOT(networkError(QNetworkReply::NetworkError)));if (TestingTimer) {
TestingTimer->stop();
TestingTimer->deleteLater();
TestingTimer = NULL;}
TestingTimer = new QTimer(this);
connect(TestingTimer, SIGNAL(timeout()), this, SLOT(onDelayedNetworkTestReponse()));
TestingTimer->start(5000);break;
case QMessageBox::No:
QMessageBox::information(this, "Test cancelled.",
"Network test cancelled.",
QMessageBox::Ok);break;
default:
QMessageBox::information(this, "Test cancelled.",
"Network test cancelled.",
QMessageBox::Ok);break;
}
}
@The function that received the results of the test:
@void QTBasicWidget::processTestResults() {if (TestingTimer) {
TestingTimer->stop();
TestingTimer->deleteLater();
TestingTimer = NULL;}
LoggingWidget->logText(tr("Reply received."));
auto reply = qobject_cast< QNetworkReply *>(sender());
QByteArray bytes = reply->readAll();
QString str = QString::fromUtf8(bytes.data(), bytes.size());LoggingWidget->logText(tr("Raw data from reply: ") + str);
GLint statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
LoggingWidget->logText(tr("Reply status code: ") + QString::number(statusCode));
if (statusCode == 200) {
QMessageBox::StandardButton NetworkTestResults;
NetworkTestResults = QMessageBox::information(this, "Test succeeded!.",
"Network test succeeded.",
QMessageBox::Ok);}
else {QMessageBox::StandardButton NetworkTestFailed;
NetworkTestFailed = QMessageBox::critical(this, "Test failed!.",
"Network test failed.",
QMessageBox::Ok);}
}
@Error handling function:
@
void QTBasicWidget::networkError(QNetworkReply::NetworkError err) {if (CurrentlyDebugging) {
LoggingWidget->logText(tr("Network error. Error code is: ") + QString::number(err));
}
QMessageBox::StandardButton CriticalMessageBox;
CriticalMessageBox = QMessageBox::critical(this, tr("Licensing Server Error"),
tr("Specific error code was (") + QString::number(err) + tr(")"), QMessageBox::Ok);}
@
