Urlfetch is not following some redirects

Question

I'm experiencing an issue with urlfetch. Seems that for the URL used in the code, follow_redirects=True works only locally.

Here's the code I used for testing:

def redirect_test():
    url = 'http://0214.by/job.php?busy=ПОСТОЯННАЯ'
    response = urlfetch.fetch(url, follow_redirects=True)

    if 'location' in response.headers:
        ret = 'redirect ignored. location: %s<br>' % response.headers['location']
        url = urlparse.urljoin(url, response.headers['location'])
        response = urlfetch.fetch(url, follow_redirects=False)
        if 'location' in response.headers:
            ret += 'redirect followed manually and another redirect response received'
        else:
            ret += 'redirect followed manually and no more redirects received'
    else:
        ret = 'redirect followed automatically'

    return ret

The problem is that when I'm running this code locally I'm always getting the "Redirect followed automatically" message. When deployed on google app engine, the "Redirect followed manually and no more redirects received" message is always shown.

The URL returns a redirect to https page.

It makes me think the redirect is followed as expected only when running locally for some reason. I would appreciate any ideas on what this could be caused by.