js生成接口请求参数签名加密

定义规则：将所有参数字段按首字母排序， 拼接成key1 = value1 & key2 = value2的格式，再在末尾拼接上key = appSecret， 再做MD5加密生成sign，方法如下：

function getSign(params, kAppKey, kAppSecret) {    if (typeof params == "string") {        return paramsStrSort(params);    } else if (typeof params == "object") {        var arr = [];        for (var i in params) {            arr.push((i + "=" + params[i]));        }        return paramsStrSort(arr.join(("&")));    }}function paramsStrSort(paramsStr) {    var url = paramsStr + "&appKey=" + kAppKey;    var urlStr = url.split("&").sort().join("&");    var newUrl = urlStr + '&key=' + kAppSecret;    return md5(newUrl);}

调用：

var params = "xid=" + xid + "&type=" + type + "&pageSize=" + pageSize + "&pageNo=" + pageNo;var sign = getSign(params, kAppKey, kAppSecret);

或:

var paramsObj = { xid: xid, pageSize: pageSize, type: type, pageNo: pageNo };var sign = getSign(paramsObj, kAppKey, kAppSecret);

kAppKey，kAppSecret为常量，一般由后端定义好！签名加密方法依托!