微信小程序（订阅消息）

小程序模板消息即将被废弃掉，于是有了新接口wx.requestSubscribeMessage

订阅消息文档

步骤：
1、获取用户openid 、access_token（前面文章提到过）
2、获取模板 ID
3、获取下发权限(api)
4、发送订阅消息 (api)

模板id

小程序代码：
获取下发权限：

// login.js
requestMsg(){
    return new Promise((resolve, reject) => {
      wx.requestSubscribeMessage({
        tmplIds: ["MUtLwsw0xCndRULTgNHiXwGDyHJ-ZwAFL-b3kALcl0c"],
        success: (res) => {
          if (res['MUtLwsw0xCndRULTgNHiXwGDyHJ-ZwAFL-b3kALcl0c'] === 'accept'){
            wx.showToast({
              title: '订阅OK！',
              duration: 1000,
              success(data) {
                //成功
                resolve()
              }
            })
          }
        },
        fail(err) {
          //失败
          console.error(err);
          reject()
        }
      })
    })
  }

// index.wxml
<button  class="v-btn mt40" bindtap="sendMsg">发生订阅消息</button>

// index.js 
// 点击发生订阅
sendMsg:function(e){
    wx.request({
      url: 'https://cff.mynatapp.cc/wxXcx/sendMessage',
      method: 'POST',
      data: { },
      header: {
        'content-type': 'application/json' // 默认值
      },
      success(res) {
        console.log(res)
      }
    })
  }

nodejs（koa2）代码：
发送订阅消息：

//  index.js
const router = require('koa-router')()
const request  = require('superagent')
let AppID = 'xxxxx'
let AppSecret = 'xxxxx'
let access_token = 'xxxxx'
let openid = 'xxxxx'

// 点击发生订阅消息
router.post('/wxXcx/sendMessage', async (ctx, next) => {
    let requestData ={
        "touser": openid,
        "template_id": "MUtLwsw0xCndRULTgNHiXwGDyHJ-ZwAFL-b3kALcl0c",
        "page": "index",
        "data": {
            "phrase1": {
                "value": "王小二"
            },
            "date5": {
                "value": "2019年10月1日 15:01"
            },
            "phrase4": {
                "value": "王老师"
            },
            "thing2": {
                "value": "ps入门到精通"
            },
            "character_string6": {
                "value": "1/10"
            }
        }
      }

        // 2、发送模板消息
    let res = await request
            .post(`https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token=${access_token}`)
            .send(requestData)
            .set('Accept', 'application/json')

      console.log(res)

      ctx.body = { 
        code: '200', 
        data: null, 
        msg: '操作成功'
    }
})