From e4c2d9673ba45ec48c4cdd9122cda3d7dab78e0d Mon Sep 17 00:00:00 2001
From: Artyom Belousov <flygrounder@yandex.ru>
Date: Sat, 11 May 2019 17:06:01 +0300
Subject: [PATCH] Added auth opportunity for VK callback API

---
 main.go        | 2 +-
 vk/handlers.go | 5 ++++-
 vk/structs.go  | 6 ++++--
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/main.go b/main.go
index 0a49521..7d5c049 100644
--- a/main.go
+++ b/main.go
@@ -11,5 +11,5 @@ func main() {
 	rand.Seed(time.Now().UTC().UnixNano())
 	r := gin.Default()
 	r.POST("callback/message", vk.HandleMessage)
-	r.Run()
+	r.Run(":80")
 }
diff --git a/vk/handlers.go b/vk/handlers.go
index 45f41a1..7865a7c 100644
--- a/vk/handlers.go
+++ b/vk/handlers.go
@@ -7,12 +7,15 @@ import (
 )
 
 func HandleMessage(c *gin.Context) {
-	defer c.String(http.StatusOK, "ok")
 	var req MessageRequest
 	c.BindJSON(&req)
+	if (req.Type == "confirmation") && (req.GroupId == GROUPID) {
+		c.String(http.StatusOK, CONFIRMATION_STRING)
+	}
 	if req.Secret != SECRET_KEY {
 		return
 	}
 	cardName := cardsinfo.GetOriginalName(req.Object.Body)
 	Message(req.Object.UserId, cardName)
+	c.String(http.StatusOK, "ok")
 }
diff --git a/vk/structs.go b/vk/structs.go
index ee1ef27..5593699 100644
--- a/vk/structs.go
+++ b/vk/structs.go
@@ -1,8 +1,10 @@
 package vk
 
 type MessageRequest struct {
-	Object UserMessage `json:"object"`
-	Secret string      `json:"secret"`
+	Type    string      `json:"type"`
+	GroupId int64       `json:"group_id"`
+	Object  UserMessage `json:"object"`
+	Secret  string      `json:"secret"`
 }
 
 type UserMessage struct {