const request = require('request');
const APPID = "你的id";
const APPSECRET = "你的秘钥，获取APPID一样差不多";
const URL = `https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=${APPID}&secret=${APPSECRET}`;

function invokecloudfunction(access_token) {
    const FUNCTION_NAME = 'sum';
    const ENV = '云服务环境id';
    const INVOKE_CLOUD_FUNCTION_URL = `https://api.weixin.qq.com/tcb/invokecloudfunction?access_token=${access_token}&env=${ENV}&name=${FUNCTION_NAME}`;
    return new Promise(function(resolve,reject) {
        request.post({
            url:INVOKE_CLOUD_FUNCTION_URL,
            json: {
                a:1,
                b:2
            }
           }, function(err, httpResponse,body) {
        if (err) {
            reject(err);
        } else {
            resolve(body);
        }
    })});
}
// 获取token
function getAccessToken() {
    return new Promise(function(resolve,reject) {
        request.get(URL, function(err, httpResponse, body) {
            if (err) {
                reject(err);
            } else {
                resolve(JSON.parse(body));
            }
        });
    })
}

// 触发云函数
getAccessToken().then((_body)=> {
    const {access_token} = _body;
    return invokecloudfunction(access_token);

}).then(body => {
    console.log(body);
}).catch(err => {
    console.log(err);
})