Golang 接入钉钉 群 消息通知（签名版）

package main

import (
    "crypto/hmac"
    "crypto/sha256"
    "encoding/base64"
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
    "net/url"
    "strings"
    "time"
)


type SimpleRequest struct {
    Text SimpleRequestContent `json:"text"`
    Msgtype string `json:"msgtype"`
}

type SimpleRequestContent struct {
    Content string `json:"content"`
}
var UrlAddress = "https://oapi.dingtalk.com/robot/send?access_token=f092c30d******************"
var Secret = "SEC2d31d9a834f********************"
func main() {
    // 设置请求头
    requestBody := SimpleRequest{
        Text: SimpleRequestContent{
            Content: "simple request",
        },
        Msgtype: "text",
    }
    reqBodyBox, _ := json.Marshal(requestBody)
    body := string(reqBodyBox)

    //  构建 签名
    //  把timestamp+"
"+密钥当做签名字符串，使用HmacSHA256算法计算签名，然后进行Base64 encode，最后再把签名参数再进行urlEncode，得到最终的签名（需要使用UTF-8字符集）。
    timeStampNow := time.Now().UnixNano() / 1000000
    signStr :=fmt.Sprintf("%d
%s", timeStampNow, Secret)

    hash := hmac.New(sha256.New, []byte(Secret))
    hash.Write([]byte(signStr))
    sum := hash.Sum(nil)

    encode := base64.StdEncoding.EncodeToString(sum)
    urlEncode := url.QueryEscape(encode)

    // 构建 请求 url
    UrlAddress = fmt.Sprintf("%s&timestamp=%d&sign=%s", UrlAddress, timeStampNow, urlEncode)

    // 构建 请求体
    request, _ := http.NewRequest("POST", UrlAddress, strings.NewReader(body))

    // 设置库端口
    client := &http.Client{}

    // 请求头添加内容
    request.Header.Set("Content-Type", "application/json")

    // 发送请求
    response, _ := client.Do(request)
    fmt.Println("response: ", response)

    // 关闭 读取 reader
    defer response.Body.Close()

    // 读取内容
    all, _ := ioutil.ReadAll(response.Body)
    fmt.Println("all: ", string(all))
}