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MD5!
