def check_credentials(request, other_application='admin',
                      expiration=60 * 60, gae_login=True):
    if request.env.web2py_runtime_gae:
        from google.appengine.api import users
        if users.is_current_user_admin():
            return True
        elif gae_login:
            login_html = '<a href="%s">Sign in with your google account</a>.' \
                % users.create_login_url(request.env.path_info)
            raise HTTP(200, '<html><body>%s</body></html>' % login_html)
        else:
            return False
    else:
        t0 = time.time()
        dt = t0 - expiration
        s = get_session(request, other_application)
        r = (s.authorized and s.last_time and s.last_time > dt)
        if r:
            s.last_time = t0
            set_session(request,s,other_application)
        return r
checks that user is authorized to access other_application
dataset/ETHPy150Open uwdata/termite-visualizations/web2py/gluon/fileutils.py/check_credentials