feat: support dingtalk push

pkg/message/dtalk.go

@@ -1,9 +1,89 @@
 package message
 
-type DTalkMessage struct {
-	WebhookUrl string
+import (
+	"bytes"
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+type response struct {
+	Code int    `json:"errcode"`
+	Msg  string `json:"errmsg"`
 }
 
-func (d *DTalkMessage) send(content string) {
+type Dtalk struct {
+	AccessToken string
+	Secret      string
+}
 
+func (t *Dtalk) Request(msg interface{}) ([]byte, error) {
+	b, err := json.Marshal(msg)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := http.Post(t.getURL(), "application/json", bytes.NewBuffer(b))
+	if err != nil {
+		return nil, err
+	}
+
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	var r response
+	err = json.Unmarshal(body, &r)
+	if err != nil {
+		return body, err
+	}
+	if r.Code != 0 {
+		return body, errors.New(fmt.Sprintf("response error: %s", string(body)))
+	}
+	return body, err
+}
+
+// SendMessageText Function to send message
+func (t *Dtalk) SendMessageText(text string, at ...string) ([]byte, error) {
+	msg := map[string]interface{}{
+		"msgtype": "text",
+		"text": map[string]string{
+			"content": text,
+		},
+	}
+	resp, err := t.Request(msg)
+	return resp, err
+}
+
+func (t *Dtalk) SendMessageMarkdown(title, text string, at ...string) ([]byte, error) {
+	msg := map[string]interface{}{
+		"msgtype": "markdown",
+		"markdown": map[string]string{
+			"title": title,
+			"text":  text,
+		},
+	}
+	resp, err := t.Request(msg)
+	return resp, err
+}
+
+func (t *Dtalk) hmacSha256(stringToSign string, secret string) string {
+	h := hmac.New(sha256.New, []byte(secret))
+	h.Write([]byte(stringToSign))
+	return base64.StdEncoding.EncodeToString(h.Sum(nil))
+}
+
+func (t *Dtalk) getURL() string {
+	wh := "https://oapi.dingtalk.com/robot/send?access_token=" + t.AccessToken
+	timestamp := time.Now().UnixNano() / 1e6
+	stringToSign := fmt.Sprintf("%d\n%s", timestamp, t.Secret)
+	sign := t.hmacSha256(stringToSign, t.Secret)
+	url := fmt.Sprintf("%s&timestamp=%d&sign=%s", wh, timestamp, sign)
+	return url
 }