记录erlang写钉钉机器人

%% erlang version : 21.3
%% 钉钉自定义机器人,安全设置加签
%% webhook 地址
-define(DINGDING_ROBOT_URL, "https://oapi.dingtalk.com/robot/send?access_token=xxxx"). 
%% 安全加密
-define(DINGDING_SECURT, "yyy"). 

notify_robot() ->
    Timestamp = 1701656608, 
    Sign = get_sign(Timestamp), 
    Url = lists:concat([?DINGDING_ROBOT_URL, "&timestamp=", Timestamp, "&sign=", Sign]), 
    Header = [], 
    Type = "application/json", 
    Body = "", 
    Options = [], 
    case catch httpc:request(post, {Url, Header, Type, Body}, [{timeout, 3000}], Options) of 
        {ok, {_, _, Data}} -> 
            ok; 
        _Res -> 
            ok 
     end. 
 
 get_sign(Timestamp) -> 
     SecStr = lists:concat([Timestamp, "\n", ?DINGDING_SECURT]), 
     HMac256 = crypto:hmac(sha256, ?DINGDING_SECURT, SecStr), 
     Base64 = base64:encode(HMac256), 
     edoc_lib:escape_uri(binary_to_list(Base64)).