请问如何使用JavaScript Plugin，能否提供一个示例？

[helloworld8192]

尝试在后台添加JavaScript类型的plugin，内容如下：

function NewPlugin(cfg) {
  // import builtin modules
  var JSON = require("json")
  var HTTP = require("http")
  var REDIS = require("redis")
  var LOG = require("log")
  // init plugin
  return {
    // filter pre method
    "pre": function(ctx) {
  return {"code": 403, "error": "not login"}
    }
  }
}

但是没有效果，请求还是被正常转发
能否提供一个plugin_js的示例，谢谢！

[zhangxu19830126]

需要在页面上apply这个插件，插件不是创建就生效的。

[helloworld8192]

@zhangxu19830126 谢谢，但是我已经把要启用的插件拖拽到“已使用插件”下面了，提交保存后仍然没生效。

不知道是哪里的问题

[zhangxu19830126]

把proxy的日志贴上来看看

[helloworld8192]

2019/11/04 11:48:13.729554 [info] filter added, filter=<PREPARE>
2019/11/04 11:48:13.729572 [info] filter added, filter=<TIMERANGE>
2019/11/04 11:48:13.729580 [info] filter added, filter=<WHITELIST>
2019/11/04 11:48:13.729586 [info] filter added, filter=<BLACKLIST>
2019/11/04 11:48:13.729593 [info] filter added, filter=<CACHING>
2019/11/04 11:48:13.729599 [info] filter added, filter=<ANALYSIS>
2019/11/04 11:48:13.729604 [info] filter added, filter=<RATE-LIMITING>
2019/11/04 11:48:13.729614 [info] filter added, filter=<CIRCUIT-BREAKER>
2019/11/04 11:48:13.729627 [info] filter added, filter=<HTTP-ACCESS>
2019/11/04 11:48:13.729640 [info] filter added, filter=<HEADER>
2019/11/04 11:48:13.729647 [info] filter added, filter=<XFORWARD>
2019/11/04 11:48:13.729652 [info] filter added, filter=<VALIDATION>
2019/11/04 11:48:13.729657 [info] filter added, filter=<JS-Plugin-Engine>
2019/11/04 11:48:13.729717 [info] start server check worker
2019/11/04 11:48:13.733544 [info] load proxies
2019/11/04 11:48:13.733612 [info] router start watch meta data 
2019/11/04 11:48:13.733660 [info] watch event at: </test>
2019/11/04 11:48:13.736440 [info] proxy <000192.168.1.101:9010> added
2019/11/04 11:48:13.736453 [info] load clusters
2019/11/04 11:48:13.736918 [info] cluster <5> added, data <id:5 name:"clusterOne" >
2019/11/04 11:48:13.736930 [info] load servers
2019/11/04 11:48:13.737378 [info] analysis: added, key=<6> interval=<1s>
2019/11/04 11:48:13.737464 [info] server <6> added, data <id:6 addr:"192.168.1.101:3009" maxQPS:1000 >
2019/11/04 11:48:13.737470 [info] load binds
2019/11/04 11:48:13.737531 [warning] server <6> heath check not setting
2019/11/04 11:48:13.737549 [info] server <6> changed to Up
2019/11/04 11:48:13.737846 [info] bind <5,6> created
2019/11/04 11:48:13.737852 [info] load apis
2019/11/04 11:48:13.738547 [info] api <7> added, data <id:7 name:"test1" urlPattern:"/echo" method:"*" status:Up ipAccessControl:<blacklist:"110.110.110.110" blacklist:"1.2.3.4" > nodes:<clusterID:5 urlRewrite:"/echo?after=10" attrName:"local3009" > >
2019/11/04 11:48:13.738604 [info] api <1001> added, data <id:1001 name:"test2" urlPattern:"/echo2" method:"*" status:Up nodes:<clusterID:5 urlRewrite:"/echo?before=7" > >
2019/11/04 11:48:13.738610 [info] load routings
2019/11/04 11:48:13.739021 [info] load plugins
2019/11/04 11:48:13.739371 [info] plugin <8/TestPlugin:1> added
2019/11/04 11:48:13.739380 [info] load applied plugins
2019/11/04 11:48:13.740239 [info] plugin: 8/TestPlugin:1 applied with index 0
2019/11/04 11:48:13.740255 [info] plugins applied with [8]
2019/11/04 11:48:13.740283 [info] metric: disable prometheus push client 
2019/11/04 11:48:13.740664 [info] start http at 192.168.1.101:9010


2019/11/04 11:48:19.930876 [info] [GET]/echo2: match api test2, has 1 dispatches
2019/11/04 11:48:19.930894 [debug] [GET]/echo2: dipatch node 0 to server 6
2019/11/04 11:48:19.930919 [info] [GET]/echo2: dipatch node 0 rewrite url to /echo?before=7
2019/11/04 11:48:19.930967 [info] [GET]/echo2: dispatch node 0 sent for 0 times
2019/11/04 11:48:19.932170 [debug] [GET]/echo2: dipatch node 0 return by 192.168.1.101:3009 with code 200, body <POST!>
2019/11/04 11:48:19.932301 [info] filter: 192.168.1.101 GET "/echo?before=7" 200 "PostmanRuntime/7.1.1" 192.168.1.101:3009 1.211623ms
2019/11/04 11:48:19.932324 [info] [GET]/echo2: return with raw body
2019/11/04 11:48:19.932355 [debug] [GET]/echo2: dispatch complete

看日志里：
2019/11/04 11:48:13.739021 [info] load plugins
2019/11/04 11:48:13.739371 [info] plugin <8/TestPlugin:1> added
2019/11/04 11:48:13.739380 [info] load applied plugins
2019/11/04 11:48:13.740239 [info] plugin: 8/TestPlugin:1 applied with index 0
2019/11/04 11:48:13.740255 [info] plugins applied with [8]
是不是JS_Plugin应该生效了？

[zhangxu19830126]

js插件是个试验特性，默认是关闭的，虽然你可以在web上维护，但是proxy不会用js插件。需要在proxy启动的时候加上--js参数手动启用

[helloworld8192]

我在proxy启动的时候加上--js 或者 --js=true 仍然没有生效

[zhangxu19830126]

有日志么

[zhangxu19830126]

Fix