企业微信发送企业群告警

　　发送告警消息func QY_Wechat_SendMessage(accessToken string, req *SendMessageReq) (rsp *SendMessageRsp, err error) { 	var resp *http.Response 	var bytes []byte 	rsp = &SendMessageRsp{}  	body, _ := json.Marshal(req)  	url := sendMessageUrl + ＂access_token=＂ + accessToken 	if resp, err = http.Post(url, ＂application/json＂, strings.NewReader(string(body))); err != nil { 		return 	} 	if bytes, err = ioutil.ReadAll(resp.Body); err != nil { 		return 	}  	json.Unmarshal(bytes, &rsp)  	if rsp.Errmsg != ＂ok＂ { 		err = errors.New(rsp.Errmsg) 		return 	}  	fmt.Println(＂token info: ＂ + helper.StuToJson(rsp)) 	return }
　　媒体文件上传func QY_Wechat_MediaUpload(accessToken string, mediaType, fileName string, body []byte) (rsp *MediaUploadRsp, err error) { 	var ( 		req            *http.Request 		resp           *http.Response 		requestBodyStr string 		bodyStr        string 	) 	var bytes []byte 	dc := http.DefaultClient 	rsp = &MediaUploadRsp{} 	buf := &bytes2.Buffer{} 	writer := multipart.NewWriter(buf) 	fw, err := writer.CreateFormFile(＂media＂, fileName) 	if err != nil { 		return 	} 	_, err = fw.Write(body) 	url := mediaUploadUrl + ＂access_token=＂ + accessToken + ＂&type=＂ + mediaType 	writer.Close() 	if req, err = http.NewRequest(＂POST＂, url, buf); err != nil { 		return 	}  	req.Header.Add(＂Content-Type＂, writer.FormDataContentType()) 	if resp, err = dc.Do(req); err != nil { 		return 	} 	if bytes, err = ioutil.ReadAll(resp.Body); err != nil { 		return 	}  	json.Unmarshal(bytes, &rsp)  	if rsp.Errmsg != ＂ok＂ { 		err = errors.New(rsp.Errmsg) 		return 	}  	fmt.Println(＂token info: ＂ + helper.StuToJson(rsp)) 	return }