feat: httpPost url templating

alert.go

@@ -408,14 +408,20 @@ func newAlertNode(et *ExecutingTask, n *pipeline.AlertNode, d NodeDiagnostic) (a
 	}
 
 	for _, p := range n.HTTPPostHandlers {
+		if p.Endpoint == "" && p.URL == "" {
+			return nil, errors.New("Either URL or endpoint must be non-empty")
+		}
 		c := httppost.HandlerConfig{
 			URL:             p.URL,
 			Endpoint:        p.Endpoint,
 			Headers:         p.Headers,
 			CaptureResponse: p.CaptureResponseFlag,
 			Timeout:         p.Timeout,
 		}
-		h := et.tm.HTTPPostService.Handler(c, ctx...)
+		h, err := et.tm.HTTPPostService.Handler(c, ctx...)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to create HTTPPostService.Handler")
+		}
 		an.handlers = append(an.handlers, h)
 	}
 

http_post.go

@@ -40,7 +40,12 @@ func newHTTPPostNode(et *ExecutingTask, n *pipeline.HTTPPostNode, d NodeDiagnost
 
 	// Should only ever be 0 or 1 from validation of n
 	if len(n.URLs) == 1 {
-		e := httppost.NewEndpoint(n.URLs[0], nil, httppost.BasicAuth{}, nil, nil)
+		temp, err := httppost.GetTemplate(n.URLs[0], "")
+		if err != nil {
+			return nil, errors.Wrap(err, "error in url templating")
+		}
+
+		e := httppost.NewEndpoint(temp, nil, httppost.BasicAuth{}, nil, nil)
 		hn.endpoint = e
 	}
 
@@ -167,8 +172,11 @@ func (n *HTTPPostNode) postRow(row *models.Row) (*http.Response, error) {
 	body := new(bytes.Buffer)
 
 	var contentType string
+	var mr *mappedRow
+	if n.endpoint.RowTemplate() != nil || n.endpoint.URL() != nil {
+		mr = newMappedRow(row)
+	}
 	if n.endpoint.RowTemplate() != nil {
-		mr := newMappedRow(row)
 		err := n.endpoint.RowTemplate().Execute(body, mr)
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to execute template")
@@ -182,8 +190,7 @@ func (n *HTTPPostNode) postRow(row *models.Row) (*http.Response, error) {
 		}
 		contentType = "application/json"
 	}
-
-	req, err := n.endpoint.NewHTTPRequest(body)
+	req, err := n.endpoint.NewHTTPRequest(body, mr)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to marshal row data json")
 	}