[golang]推送钉钉机器人消息

package main
import (
  "bytes"
  "encoding/json"
  "fmt"
  "io/ioutil"
  "log"
  "net/http"
  "strings"
)
type Md struct {
  Title string `json:"title"`
  Text  string `json:"text"`
}
type Ding struct {
  Msgtype  string `json:"msgtype"`
  Markdown Md     `json:"markdown"`
}
func DingMarshal(title, text string) string {
  // struct序列化为json
  var myjson Ding = Ding{
    Msgtype: "markdown",
    Markdown: Md{
      Title: title,
      Text:  text,
    },
  }
  va, err := json.Marshal(myjson)
  if err != nil {
    panic(err)
  }
  return string(va)
}
func PostUrl(jsondata string) {
  // 发起post请求
  // 钉钉群机器人的webhook
  url := "dingding webhook"
  var jsonstr = []byte(jsondata)
  req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonstr))
  if err != nil {
    log.Fatal(err)
  }
  req.Header.Set("Content-Type", "application/json;charset=utf-8")
  client := &http.Client{}
  resp, err := client.Do(req)
  if err != nil {
    log.Fatal(err)
  }
  defer resp.Body.Close()
    // 响应的数据也可以不要
  body, err := ioutil.ReadAll(resp.Body)
  if err != nil {
    log.Fatal(err)
  }
  fmt.Printf("响应体: %v\n", string(body))
}
func SpliceString() string {
    // 字符串拼接
  var rst strings.Builder
  rst.WriteString("# 标题1 \n\n")
  rst.WriteString("- Golang \n\n")
  rst.WriteString("--- \n\n")
  rst.WriteString("## 标题2 \n\n")
  rst.WriteString("- 无序列表1 \n\n")
  rst.WriteString("- 无序列表2 \n\n")
  rst.WriteString("--- \n\n")
  rst.WriteString("### 标题3 \n\n")
  rst.WriteString("1. 有序列表1 \n\n")
  rst.WriteString("2. 有序列表2 \n\n")
    var msg string = "hello world"
  rst.WriteString("3. " + msg + " \n\n")
  return rst.String()
}
func main() {
  var title string = "测试标题"
  var text string = SpliceString()
  var va string = DingMarshal(title, text)
  PostUrl(va)
}