微信程序开发系列教程（一）开发环境搭建

var express = require('express');
var routesEngine = require('./index.js');
var app = express();
routesEngine(app);
app.listen(process.env.PORT || 3000, function () {
console.log('Listening on port, process.cwd(): ' + process.cwd() );
});
In implementation of index.js, now we need to implement verification process:
var request = require('request');
var jsSHA = require('jssha');
module.exports = function (app) {
app.route('/').get(function(req,res){
var token="jerry"; // replace it with your own token
var signature = req.query.signature,
timestamp = req.query.timestamp,
echostr = req.query.echostr,
nonce = req.query.nonce;
oriArray = new Array();
oriArray[0] = nonce;
oriArray[1] = timestamp;
oriArray[2] = token;
oriArray.sort();
var original = oriArray.join('');
var shaObj = new jsSHA("SHA-1", 'TEXT');
shaObj.update(original);
var scyptoString = shaObj.getHash('HEX');
console.log("calculated string: " + scyptoString);
if (signature == scyptoString) {
res.send(echostr);
} else {
res.send('bad token');
}
});
};