crated func CallUrl for webhooks

assignment2/webhook.go

 package assignment2
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
+	"io/ioutil"
 	"net/http"
+	"strconv"
 )
 
 var webhooks []WebhookRegistration //Webhook DB
@@ -38,10 +41,28 @@ func WebhookHandeler(w http.ResponseWriter, r *http.Request) {
 func ServiceHandler(w http.ResponseWriter, r *http.Request) {
 
 	switch r.Method {
-	case MethodPost:
+	case http.MethodPost:
 		fmt.Println("Recive POST request")
 		for _, v := range webhooks {
 			go CallUrl(v.URL, "Resonse on registered event in webhook demo: "+v.Event)
 		}
+	default:
+		http.Error(w, "Method is invalid "+r.Method, http.StatusBadRequest)
+	}
+}
+func CallUrl(url string, content string) {
+	fmt.Println("Attempting invocation of url " + url + "...")
+	res, err := http.Post(url, "string", bytes.NewReader([]byte(content)))
+	if err != nil {
+		fmt.Println("Error in HTTP request: " + err.Error())
 	}
+
+	response, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		fmt.Println("Something is wrong with invocation response: " + err.Error())
+	}
+
+	fmt.Println("Webhook invoked. Received status code " + strconv.Itoa(res.StatusCode) +
+		" and body: " + string(response))
+
 }