HttpCallout error [StatusCode=302]

Question

I tried making an http callout and the response received is redirection error as per below: System.HttpResponse[Status=Moved Temporarily, StatusCode=302] . Is there any work around to handle the redirection for HttpRequest object in salesforce.

I also tried to make the callout in loop until we get the response but no success (as suggested HTTP Callout Error)

Answer 1

Some HTTP client code handles this automatically but in Apex you have to do the work yourself.

Documentation about HTTP 302 explains:

The HTTP response status code 302 Found is a common way of performing URL redirection.

An HTTP response with this status code will additionally provide a URL in the location header field. The user agent (e.g. a web browser) is invited by a response with this code to make a second, otherwise identical, request to the new URL specified in the location field.

So when you get this status code you need to make a second request using the value you find in the location header of the first response e.g.:

HttpResponse res = new Http().send(req);
while (res.getStatusCode() == 302) {
    req.setEndpoint(res.getHeader('Location'));
    res = new Http().send(req);
}