Learn how to use static IP on Bluemix servers.

const express=require("express");
const bodyParser=require("body-parser")
const request=require("request")
const app=express();
const cfenv=require("cfenv");
constappEnv = cfenv.getAppEnv();

const ChannelAccessToken="ACCESS TOKEN"

const vcap_services=JSON.parse(process.env.VCAP_SERVICES);
const proxyURL=vcap_services["statica"][0].credentials.STATICA_URL;

app.use(bodyParser.urlencoded({
  extended —true
}));
app.use(bodyParser.json())

app.use(express.static(__dirname+"/public"))

app.listen(appEnv.port, "0.0.0.0", function(){
  console.log("AppLog:server starting on" + appEnv.url);
});

var heads = {
  "Content-Type": "application/json; charset=UTF-8",
  "Authorization": "Bearer {"+ChannelAccessToken+"}",
  "User-Agent": "node.js"
}

app.post("/",(req,res)=>{
  var events = req.body ["events" ]
  var replyToken= events [0] [ "replyToken" ]
  var type=events[0]["message"]["type"]
  var replyText=""
  if(type=="text"){
    replyText=events[0]["message"]["text"]
    console.log (replyText)
    var body = {
      "replyToken"—replyToken,
      "messages": [{
        "type": "text",
        "text": "Reply Text"
      }]
    }

    var options = {
      url: "https://api.line.me/v2/bot/message/reply",
      proxy —proxyURL,
      headers —headers,
      json —true,
      body:body
    }

    request.post(options,(error, response, body)=>{
      if(!error&response.statusCode==200){
        console.log("AppLog:success")
      }
      else{
        console.log("AppLog:"+response.statusCode+"error,"+response.body.message)
      }
    })
  }
})