signature_nodejs.js

var crypto = require("crypto");

function getsignature(appid, appkey, timestamp, nonce, content) {
    var arr = new Array(appid.toLowerCase(), appkey.toLowerCase());
    arr.sort();
    var appinfo = arr.join('');
    appinfo = crypto.createHash('md5').update(appinfo, 'utf8').digest('hex').toLowerCase();

    var sigArr = new Array(appinfo, timestamp.toLowerCase(), nonce.toLowerCase());
    sigArr.sort();
    //将content内容插到最开始部分
    var conArr = new Array(content.toLowerCase());
    var newArr = conArr.concat(sigArr);

    var signature = newArr.join('');
    signature = crypto.createHash('sha1').update(signature, 'utf8').digest('hex').toLowerCase();

    return signature;
};

exports.signature = getsignature;