node develops Wechat official account. Wechat cannot receive xml data returned by ctx.body
var sha1 = require ("sha1");
var Wechat = require (". / wechat")
var getRawBody = require ("raw-body")
var util = require (".. / libs/util")
var answer = require (". / answer")
module.exports = function (opts) {
var wechat = new Wechat(opts)
return async function(ctx,next){
var token = opts.token;
var signature = ctx.query.signature
var nonce = ctx.query.nonce
var timestamp = ctx.query.timestamp
var echostr = ctx.query.ecostr
var str = [token,timestamp,nonce].sort().join("")
var sha = sha1(str)
console.log("PPPP+"+ctx.method)
if(ctx.method === "GET"){
if(sha ===signature){
ctx.body = ctx.query.echostr
}else {
ctx.body = "wrong"
}
}else if(ctx.method === "POST"){
if(sha ===signature){
ctx.body = ctx.query.echostr
}else {
ctx.body = "wrong"
return false
}
var data = await getRawBody(ctx.req,{
length : ctx.length,
limit : "1mb",
encoding : ctx.charset
})
var content = await util.parseXmlAsync(data)
console.log("contentPPPP+"+content+"-------"+content.xml)
if(content.xml.MsgType === "text"){
var now = new Date().getTime()
var output=answer.text(content.xml)
ctx.body=output;
console.log(output)
}
}
}} 
