Added server side ApiVersion returned with self to distinguish client and server API version support.

doc/CHANNELING-API.txt

@@ -117,6 +117,7 @@ Special purpose documents for channling
         "Suserid": "",
         "Token": "some-very-long-string",
         "Version": "server-version-number",
+        "ApiVersion": 1.4,
         "Turn": {
           "username": "turn-username",
           "password": "turn-password",
@@ -139,11 +140,16 @@ Special purpose documents for channling
         Type       : Self (string)
         Id         : Public Session id for this connection (string).
         Sid        : Secure (non public) id for this session (string).
-        Userid  : User id if this session belongs to an authenticated user. Else empty.
-        Suserid : Secure (non public) user id if session has an user id. Else empty.
-        Token   : Security token (string), to restablish connection with the same
-                 session. Pass the value as URL query parameter t, to the websocket URL.
+        Userid     : User id if this session belongs to an authenticated user.
+                     Else empty.
+        Suserid    : Secure (non public) user id if session has an user id.
+                     Else empty.
+        Token      : Security token (string), to restablish connection with the
+                     same session. Pass the value as URL query parameter t, to
+                     the websocket URL.
         Version    : Server version number. Use this to detect server upgrades.
+        ApiVersion : Server channeling API base version. Use this version to select
+                     client side compatibility with the connected server.
         Turn       : Mapping (interface{}) to contain TURN server details, like
                      urls, password and username. See
                      http://tools.ietf.org/html/draft-uberti-behave-turn-rest-00

src/app/spreed-webrtc-server/channelling.go

@@ -85,7 +85,8 @@ type DataSelf struct {
 	Userid     string
 	Suserid    string
 	Token      string
-	Version string
+	Version    string  // Server version.
+	ApiVersion float64 // Server channelling API version.
 	Turn       *DataTurn
 	Stun       []string
 }

src/app/spreed-webrtc-server/channelling_api.go

@@ -28,6 +28,7 @@ import (
 
 const (
 	maxConferenceSize = 100
+	apiVersion        = 1.4 // Keep this in sync with CHANNELING-API docs.Hand
 )
 
 type ChannellingAPI interface {
@@ -178,6 +179,7 @@ func (api *channellingAPI) HandleSelf(session *Session) (*DataSelf, error) {
 		Suserid:    api.EncodeSessionUserID(session),
 		Token:      token,
 		Version:    api.Version,
+		ApiVersion: apiVersion,
 		Turn:       api.CreateTurnData(session),
 		Stun:       api.StunURIs,
 	}

static/js/app.js

@@ -208,9 +208,9 @@ define([
 
 	};
 
-	// Our API version as float. This value is incremented on
+	// Our client side API version as float. This value is incremented on
 	// breaking changes to plugins can check on it.
-	var apiversion = 1.4;
+	var apiversion = 1.1;
 
 	var initialize = function(app, launcher) {