From 74ffb6f98f7ee8b4e61743919ab20460c57ad4da Mon Sep 17 00:00:00 2001
From: Joram Wilander <jwawilander@gmail.com>
Date: Sun, 16 Apr 2017 21:14:31 -0400
Subject: Implement GET /webrtc/token endpoint for APIv4 (#6046)

---
 api/webrtc.go | 72 ++++-------------------------------------------------------
 1 file changed, 4 insertions(+), 68 deletions(-)

(limited to 'api')

diff --git a/api/webrtc.go b/api/webrtc.go
index ad1da31e4..58e35f2fa 100644
--- a/api/webrtc.go
+++ b/api/webrtc.go
@@ -4,18 +4,10 @@
 package api
 
 import (
-	"crypto/hmac"
-	"crypto/sha1"
-	"crypto/tls"
-	"encoding/base64"
 	"net/http"
-	"strconv"
-	"strings"
-	"time"
 
 	l4g "github.com/alecthomas/log4go"
 	"github.com/mattermost/platform/app"
-	"github.com/mattermost/platform/model"
 	"github.com/mattermost/platform/utils"
 )
 
@@ -26,68 +18,12 @@ func InitWebrtc() {
 }
 
 func webrtcToken(c *Context, w http.ResponseWriter, r *http.Request) {
-	if token, err := getWebrtcToken(c.Session.Id); err != nil {
+	result, err := app.GetWebrtcInfoForSession(c.Session.Id)
+
+	if err != nil {
 		c.Err = err
 		return
-	} else {
-		result := make(map[string]string)
-		result["token"] = token
-		result["gateway_url"] = *utils.Cfg.WebrtcSettings.GatewayWebsocketUrl
-
-		if len(*utils.Cfg.WebrtcSettings.StunURI) > 0 {
-			result["stun_uri"] = *utils.Cfg.WebrtcSettings.StunURI
-		}
-
-		if len(*utils.Cfg.WebrtcSettings.TurnURI) > 0 {
-			timestamp := strconv.FormatInt(utils.EndOfDay(time.Now().AddDate(0, 0, 1)).Unix(), 10)
-			username := timestamp + ":" + *utils.Cfg.WebrtcSettings.TurnUsername
-
-			result["turn_uri"] = *utils.Cfg.WebrtcSettings.TurnURI
-			result["turn_password"] = generateTurnPassword(username, *utils.Cfg.WebrtcSettings.TurnSharedKey)
-			result["turn_username"] = username
-		}
-		w.Write([]byte(model.MapToJson(result)))
 	}
-}
-
-func getWebrtcToken(sessionId string) (string, *model.AppError) {
-	if !*utils.Cfg.WebrtcSettings.Enable {
-		return "", model.NewLocAppError("WebRTC.getWebrtcToken", "api.webrtc.disabled.app_error", nil, "")
-	}
-
-	token := base64.StdEncoding.EncodeToString([]byte(sessionId))
-
-	data := make(map[string]string)
-	data["janus"] = "add_token"
-	data["token"] = token
-	data["transaction"] = model.NewId()
-	data["admin_secret"] = *utils.Cfg.WebrtcSettings.GatewayAdminSecret
-
-	rq, _ := http.NewRequest("POST", *utils.Cfg.WebrtcSettings.GatewayAdminUrl, strings.NewReader(model.MapToJson(data)))
-	rq.Header.Set("Content-Type", "application/json")
-
-	tr := &http.Transport{
-		TLSClientConfig: &tls.Config{InsecureSkipVerify: *utils.Cfg.ServiceSettings.EnableInsecureOutgoingConnections},
-	}
-	httpClient := &http.Client{Transport: tr}
-	if rp, err := httpClient.Do(rq); err != nil {
-		return "", model.NewLocAppError("WebRTC.Token", "model.client.connecting.app_error", nil, err.Error())
-	} else if rp.StatusCode >= 300 {
-		defer app.CloseBody(rp)
-		return "", model.AppErrorFromJson(rp.Body)
-	} else {
-		janusResponse := model.GatewayResponseFromJson(rp.Body)
-		if janusResponse.Status != "success" {
-			return "", model.NewLocAppError("getWebrtcToken", "api.webrtc.register_token.app_error", nil, "")
-		}
-	}
-
-	return token, nil
-}
 
-func generateTurnPassword(username string, secret string) string {
-	key := []byte(secret)
-	h := hmac.New(sha1.New, key)
-	h.Write([]byte(username))
-	return base64.StdEncoding.EncodeToString(h.Sum(nil))
+	w.Write([]byte(result.ToJson()))
 }
-- 
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