

def _oauth_request_token_url(self, callback_uri=None, extra_params=None):
    consumer_token = self._oauth_consumer_token()
    url = self._OAUTH_REQUEST_TOKEN_URL
    args = dict(oauth_consumer_key=escape.to_basestring(consumer_token['key']), oauth_signature_method='HMAC-SHA1', oauth_timestamp=str(int(time.time())), oauth_nonce=escape.to_basestring(binascii.b2a_hex(uuid.uuid4().bytes)), oauth_version='1.0')
    if (getattr(self, '_OAUTH_VERSION', '1.0a') == '1.0a'):
        if (callback_uri == 'oob'):
            args['oauth_callback'] = 'oob'
        elif callback_uri:
            args['oauth_callback'] = urlparse.urljoin(self.request.full_url(), callback_uri)
        if extra_params:
            args.update(extra_params)
        signature = _oauth10a_signature(consumer_token, 'GET', callback_uri, args)
    else:
        signature = _oauth_signature(consumer_token, 'GET', url, args)
    args['oauth_signature'] = signature
    return ((url + '?') + urllib_parse.urlencode(args))

dataset/ETHPy150Open D-L/SimpleBookMarks/src/tornado/auth.py OAuthMixin._oauth_request_token_url/VarMisuse@171/275 `url`->`callback_uri`