小米有品茅台抢购签名参数

小米有品茅台抢购签名参数:
public static Map<String, String> headerSign(String timestamp, String str){
    Map<String, String> map = new HashMap<>();
    int random = (int) (Math.random() * 1000000000);
    String[] signContent = new String[4];
    signContent[0] = timestamp;
    signContent[1] = String.valueOf(random);
    signContent[2] = toCharArray(str);
    signContent[3] = "****"; //签名salt
    String ypSS = DigestUtil.md5Hex(String.join("&", signContent));
    map.put("yp-srt", timestamp);
    map.put("yp-srs", String.valueOf(random));
    map.put("yp-ss", ypSS.toUpperCase());

    //生成头部d&c
    int d = (int) (Math.random() * 100) + 1;
    if(d % 2 == 0) d--;
    map.put("d", String.valueOf(d));
    //3-10次我觉得更符合
    map.put("c", String.valueOf(RandomUtil.randomInt(3,10)));
    return map;
}

部分代码，仅供参考
函数用来生成发起抢购请求的头部参数
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