nl_tokens: yhsd 接口返回的请求量 header stringify 参数
pl_tokens: function genStringify ( options ) { var stringifyFn ; if ( options . headers [ 'Content-Type' ] && options . headers [ 'Content-Type' ] . toLowerCase ( ) === 'application/x-www-form-urlencoded' ) { stringifyFn = querystring . stringify ; } else { switch ( <mask> . method . toUpperCase ( ) ) { case 'POST' : case 'PUT' : stringifyFn = JSON . stringify ; break ; } } return stringifyFn ; }