notify: catch templating errors for Wechat

Signed-off-by: Simon Pasquier <spasquie@redhat.com>

notify/impl.go

@@ -875,6 +875,9 @@ func (n *Wechat) Notify(ctx context.Context, as ...*types.Alert) (bool, error) {
 		parameters := url.Values{}
 		parameters.Add("corpsecret", tmpl(string(n.conf.APISecret)))
 		parameters.Add("corpid", tmpl(string(n.conf.CorpID)))
+		if err != nil {
+			return false, fmt.Errorf("templating error: %s", err)
+		}
 
 		apiURL := n.conf.APIURL + "gettoken"
 
@@ -885,8 +888,6 @@ func (n *Wechat) Notify(ctx context.Context, as ...*types.Alert) (bool, error) {
 
 		u.RawQuery = parameters.Encode()
 
-		level.Debug(n.logger).Log("msg", "Sending Wechat message", "incident", key, "url", u.String())
-
 		req, err := http.NewRequest(http.MethodGet, u.String(), nil)
 		if err != nil {
 			return true, err
@@ -925,6 +926,9 @@ func (n *Wechat) Notify(ctx context.Context, as ...*types.Alert) (bool, error) {
 		Type:    "text",
 		Safe:    "0",
 	}
+	if err != nil {
+		return false, fmt.Errorf("templating error: %s", err)
+	}
 
 	var buf bytes.Buffer
 	if err := json.NewEncoder(&buf).Encode(msg); err != nil {

template/default.tmpl

@@ -60,6 +60,11 @@ Alerts Resolved:
 AlertmanagerUrl:
 {{ template "__alertmanagerURL" . }}
 {{- end }}
+{{ define "wechat.default.api_secret" }}{{ end }}
+{{ define "wechat.default.to_user" }}{{ end }}
+{{ define "wechat.default.to_party" }}{{ end }}
+{{ define "wechat.default.to_tag" }}{{ end }}
+{{ define "wechat.default.agent_id" }}{{ end }}