github.com/spline-fu/mattermost-server@v4.10.10+incompatible/app/webrtc.go (about)

     1  // Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
     2  // See License.txt for license information.
     3  
     4  package app
     5  
     6  import (
     7  	"crypto/hmac"
     8  	"crypto/sha1"
     9  	"encoding/base64"
    10  	"net/http"
    11  	"strconv"
    12  	"strings"
    13  	"time"
    14  
    15  	"github.com/mattermost/mattermost-server/model"
    16  	"github.com/mattermost/mattermost-server/utils"
    17  )
    18  
    19  func (a *App) GetWebrtcInfoForSession(sessionId string) (*model.WebrtcInfoResponse, *model.AppError) {
    20  	token, err := a.GetWebrtcToken(sessionId)
    21  	if err != nil {
    22  		return nil, err
    23  	}
    24  
    25  	result := &model.WebrtcInfoResponse{
    26  		Token:      token,
    27  		GatewayUrl: *a.Config().WebrtcSettings.GatewayWebsocketUrl,
    28  	}
    29  
    30  	if len(*a.Config().WebrtcSettings.StunURI) > 0 {
    31  		result.StunUri = *a.Config().WebrtcSettings.StunURI
    32  	}
    33  
    34  	if len(*a.Config().WebrtcSettings.TurnURI) > 0 {
    35  		timestamp := strconv.FormatInt(utils.EndOfDay(time.Now().AddDate(0, 0, 1)).Unix(), 10)
    36  		username := timestamp + ":" + *a.Config().WebrtcSettings.TurnUsername
    37  
    38  		result.TurnUri = *a.Config().WebrtcSettings.TurnURI
    39  		result.TurnPassword = GenerateTurnPassword(username, *a.Config().WebrtcSettings.TurnSharedKey)
    40  		result.TurnUsername = username
    41  	}
    42  
    43  	return result, nil
    44  }
    45  
    46  func (a *App) GetWebrtcToken(sessionId string) (string, *model.AppError) {
    47  	if !*a.Config().WebrtcSettings.Enable {
    48  		return "", model.NewAppError("WebRTC.getWebrtcToken", "api.webrtc.disabled.app_error", nil, "", http.StatusNotImplemented)
    49  	}
    50  
    51  	token := base64.StdEncoding.EncodeToString([]byte(sessionId))
    52  
    53  	data := make(map[string]string)
    54  	data["janus"] = "add_token"
    55  	data["token"] = token
    56  	data["transaction"] = model.NewId()
    57  	data["admin_secret"] = *a.Config().WebrtcSettings.GatewayAdminSecret
    58  
    59  	rq, _ := http.NewRequest("POST", *a.Config().WebrtcSettings.GatewayAdminUrl, strings.NewReader(model.MapToJson(data)))
    60  	rq.Header.Set("Content-Type", "application/json")
    61  
    62  	if rp, err := a.HTTPClient(true).Do(rq); err != nil {
    63  		return "", model.NewAppError("WebRTC.Token", "model.client.connecting.app_error", nil, err.Error(), http.StatusInternalServerError)
    64  	} else if rp.StatusCode >= 300 {
    65  		defer rp.Body.Close()
    66  
    67  		return "", model.AppErrorFromJson(rp.Body)
    68  	} else {
    69  		defer rp.Body.Close()
    70  
    71  		janusResponse := model.GatewayResponseFromJson(rp.Body)
    72  		if janusResponse.Status != "success" {
    73  			return "", model.NewAppError("getWebrtcToken", "api.webrtc.register_token.app_error", nil, "", http.StatusInternalServerError)
    74  		}
    75  	}
    76  
    77  	return token, nil
    78  }
    79  
    80  func GenerateTurnPassword(username string, secret string) string {
    81  	key := []byte(secret)
    82  	h := hmac.New(sha1.New, key)
    83  	h.Write([]byte(username))
    84  	return base64.StdEncoding.EncodeToString(h.Sum(nil))
    85  }
    86  
    87  func (a *App) RevokeWebrtcToken(sessionId string) {
    88  	token := base64.StdEncoding.EncodeToString([]byte(sessionId))
    89  	data := make(map[string]string)
    90  	data["janus"] = "remove_token"
    91  	data["token"] = token
    92  	data["transaction"] = model.NewId()
    93  	data["admin_secret"] = *a.Config().WebrtcSettings.GatewayAdminSecret
    94  
    95  	rq, _ := http.NewRequest("POST", *a.Config().WebrtcSettings.GatewayAdminUrl, strings.NewReader(model.MapToJson(data)))
    96  	rq.Header.Set("Content-Type", "application/json")
    97  
    98  	// we do not care about the response
    99  	a.HTTPClient(true).Do(rq)
   100  }