feat(webhook): add httpmethod to webhook

closes #6255

pkg/services/alerting/notifiers/webhook.go

@@ -24,16 +24,18 @@ func NewWebHookNotifier(model *m.AlertNotification) (alerting.Notifier, error) {
 		Url:          url,
 		User:         model.Settings.Get("user").MustString(),
 		Password:     model.Settings.Get("password").MustString(),
+		HttpMethod:   model.Settings.Get("httpMethod").MustString("POST"),
 		log:          log.New("alerting.notifier.webhook"),
 	}, nil
 }
 
 type WebhookNotifier struct {
 	NotifierBase
-	Url      string
-	User     string
-	Password string
-	log      log.Logger
+	Url        string
+	User       string
+	Password   string
+	HttpMethod string
+	log        log.Logger
 }
 
 func (this *WebhookNotifier) Notify(evalContext *alerting.EvalContext) error {
@@ -59,10 +61,11 @@ func (this *WebhookNotifier) Notify(evalContext *alerting.EvalContext) error {
 	body, _ := bodyJSON.MarshalJSON()
 
 	cmd := &m.SendWebhookSync{
-		Url:      this.Url,
-		User:     this.User,
-		Password: this.Password,
-		Body:     string(body),
+		Url:        this.Url,
+		User:       this.User,
+		Password:   this.Password,
+		Body:       string(body),
+		HttpMethod: this.HttpMethod,
 	}
 
 	if err := bus.DispatchCtx(evalContext.Ctx, cmd); err != nil {

pkg/services/notifications/notifications.go

@@ -61,19 +61,21 @@ func Init() error {
 
 func SendWebhookSync(ctx context.Context, cmd *m.SendWebhookSync) error {
 	return sendWebRequestSync(ctx, &Webhook{
-		Url:      cmd.Url,
-		User:     cmd.User,
-		Password: cmd.Password,
-		Body:     cmd.Body,
+		Url:        cmd.Url,
+		User:       cmd.User,
+		Password:   cmd.Password,
+		Body:       cmd.Body,
+		HttpMethod: cmd.HttpMethod,
 	})
 }
 
 func sendWebhook(cmd *m.SendWebhook) error {
 	addToWebhookQueue(&Webhook{
-		Url:      cmd.Url,
-		User:     cmd.User,
-		Password: cmd.Password,
-		Body:     cmd.Body,
+		Url:        cmd.Url,
+		User:       cmd.User,
+		Password:   cmd.Password,
+		Body:       cmd.Body,
+		HttpMethod: cmd.HttpMethod,
 	})
 
 	return nil

pkg/services/notifications/webhook.go

@@ -15,10 +15,11 @@ import (
 )
 
 type Webhook struct {
-	Url      string
-	User     string
-	Password string
-	Body     string
+	Url        string
+	User       string
+	Password   string
+	Body       string
+	HttpMethod string
 }
 
 var webhookQueue chan *Webhook
@@ -44,13 +45,17 @@ func processWebhookQueue() {
 }
 
 func sendWebRequestSync(ctx context.Context, webhook *Webhook) error {
-	webhookLog.Debug("Sending webhook", "url", webhook.Url)
+	webhookLog.Debug("Sending webhook", "url", webhook.Url, "http method", webhook.HttpMethod)
 
 	client := &http.Client{
 		Timeout: time.Duration(10 * time.Second),
 	}
 
-	request, err := http.NewRequest(http.MethodPost, webhook.Url, bytes.NewReader([]byte(webhook.Body)))
+	if webhook.HttpMethod == "" {
+		webhook.HttpMethod = http.MethodPost
+	}
+
+	request, err := http.NewRequest(webhook.HttpMethod, webhook.Url, bytes.NewReader([]byte(webhook.Body)))
 	if webhook.User != "" && webhook.Password != "" {
 		request.Header.Add("Authorization", util.GetBasicAuthHeader(webhook.User, webhook.Password))
 	}