postman编写pre-script生成签名

2024-05-29 14:58
postman, 前端, 测试工具
25人已看


function  guid() {
     return  'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx' .replace(/[xy]/g,  function (c) {
         var  r = Math.random()*16|0, v = c ==  'x'  ? r : (r&0x3|0x8);
         return  v.toString(16);
     });
}

var timestamp = Math.round(new Date());
var nonce = guid();
pm.collectionVariables.set('timestamp',timestamp);
pm.collectionVariables.set("nonce", nonce);
var A= pm.environment.get("A");
var B= pm.environment.get("B");
var params = JSON.parse(pm.request.body.raw);
var strParams=JSON.stringify(params.data);
var url = pm.request.url;
var mpath=url.path;
var method=mpath[4];
var paramsEncode = "A="+A+ "&method="+ method+"&timestamp=" +timestamp+ "&nonce=" +nonce + "&data="+strParams;
var signature =  require('crypto-js') .HmacSHA1(paramsEncode, secret).toString();
var s = require('crypto-js').enc.Utf8.parse(signature);
var base64 = require('crypto-js').enc.Base64.stringify(s);
pm.collectionVariables.set("signature", base64);

注意：新版本已经无法用CryptoJS需要用require('crypto-js')。竟然不是更简洁的方法也是令人费解。有个疑问在于一直验签不通过，后面发现postman请求的body里面是常规的json形式！例如

"data": {

"productModel": "xx",

"deviceList": [

{

"did": "AA"

}

]

}

这种的通过pm.request.body.raw获取的时候获取到的是

{"productModel":"xx","deviceList":[{"did":"AA"}]}

常规形式这种竟然是默认有空格的所以一直验签失败。搞不懂后面把请求体换成

{"productModel":"xx","deviceList":[{"did":"AA"}]} 验签就通过了。搞不懂。不知道有没有大佬可以解答