PLT-4550 move webrtc to TE (#4440)

* PLT-4550 move webrtc to TE

* remove webrtc from makefile enterprise tests

1 files changed, 93 insertions, 10 deletions

diff --git a/api/webrtc.go b/api/webrtc.go
index ba6054125..0ccbd8be1 100644
--- a/api/webrtc.go
+++ b/api/webrtc.go
@@ -4,11 +4,18 @@
 package api
 
 import (
+	"crypto/hmac"
+	"crypto/sha1"
+	"crypto/tls"
+	"encoding/base64"
 	l4g "github.com/alecthomas/log4go"
-	"github.com/mattermost/platform/einterfaces"
 	"github.com/mattermost/platform/model"
 	"github.com/mattermost/platform/utils"
+	"io/ioutil"
 	"net/http"
+	"strconv"
+	"strings"
+	"time"
 )
 
 func InitWebrtc() {
@@ -20,18 +27,26 @@ func InitWebrtc() {
 }
 
 func webrtcToken(c *Context, w http.ResponseWriter, r *http.Request) {
-	webrtcInterface := einterfaces.GetWebrtcInterface()
-
-	if webrtcInterface == nil {
-		c.Err = model.NewLocAppError("webrtcToken", "api.webrtc.not_available.app_error", nil, "")
-		c.Err.StatusCode = http.StatusNotImplemented
-		return
-	}
-
-	if result, err := webrtcInterface.Token(c.Session.Id); err != nil {
+	if token, err := getWebrtcToken(c.Session.Id); 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)))
 	}
 }
@@ -49,3 +64,71 @@ func webrtcMessage(req *model.WebSocketRequest) (map[string]interface{}, *model.
 
 	return nil, nil
 }
+
+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 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))
+}
+
+func closeBody(r *http.Response) {
+	if r.Body != nil {
+		ioutil.ReadAll(r.Body)
+		r.Body.Close()
+	}
+}
+
+func RevokeWebrtcToken(sessionId string) {
+	token := base64.StdEncoding.EncodeToString([]byte(sessionId))
+	data := make(map[string]string)
+	data["janus"] = "remove_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")
+
+	// we do not care about the response
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: *utils.Cfg.ServiceSettings.EnableInsecureOutgoingConnections},
+	}
+	httpClient := &http.Client{Transport: tr}
+	httpClient.Do(rq)
+}