Basic authentication with Qt (QNetworkAccessManager)

Question

I was trying to perform basic authentication for Twitter from my Qt app. I use QNetworkAccessManager. But I couldn't find any help on this.

But I found a program called qsoapmanager which passes credentials in base64 through the header. Maybe I can do this with QNAM by setting header in QNetowrkRequest. But I failed to find a way.

In qsoapman source, header is set like this:

QHttpRequestHeader header;

header.setValue( "Authorization", QString( "Basic " ).append( auth.data() ) );

Can I do just that with QNAM/QNReq or is there a better way?

Answer 1

The recommended way is to connect to the authenticationRequired signal and set the credentials from there.

Answer 2

But if you want to do it by just setting the header value, here's how you can do that:

// HTTP Basic authentication header value: base64(username:password)
QString concatenated = username + ":" + password;
QByteArray data = concatenated.toLocal8Bit().toBase64();
QString headerData = "Basic " + data;
request.setRawHeader("Authorization", headerData.toLocal8Bit());

Answer 3

Just using qNetworkAccessManager normally but add

setRawHeader("Authorization", headerData.toLocal8Bit());

to your request.

Example:

//authentication

QString concatenated = "admin:admin"; //username:password

QByteArray data = concatenated.toLocal8Bit().toBase64();

QString headerData = "Basic " + data;

QNetworkRequest request=QNetworkRequest(QUrl("http://192.168.1.10/getinfo"));

request.setRawHeader("Authorization", headerData.toLocal8Bit());

networkAccessManager->get(request);

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