def _get_temp_url_info(self, env):
        temp_url_sig = temp_url_expires = filename = inline = None
        qs = parse_qs(env.get('QUERY_STRING', ''), keep_blank_values=True)
        if 'temp_url_sig' in qs:
            temp_url_sig = qs['temp_url_sig'][0]
        if 'temp_url_expires' in qs:
            try:
                temp_url_expires = int(qs['temp_url_expires'][0])
            except ValueError:
                temp_url_expires = 0
            if temp_url_expires < time():
                temp_url_expires = 0
        if 'filename' in qs:
            filename = qs['filename'][0]
        if 'inline' in qs:
            inline = True
        return temp_url_sig, temp_url_expires, filename, inline
Returns the provided temporary URL parameters (sig, expires),
dataset/ETHPy150Open openstack/swift/swift/common/middleware/tempurl.py/TempURL._get_temp_url_info