Add via ip address and port setting for nginx usage case (#608)

Author: qwu16

source/management_api/resource/v1/tokensResource.js

@@ -101,13 +101,20 @@ var generateToken = function (currentRoom, authData, origin, callback) {
         }
 
         token.secure = ec.ssl;
-        if (ec.hostname !== '') {
+        if (ec.via_address !== '') {
+            token.host = ec.via_address;
+        }
+        else if (ec.hostname !== '') {
             token.host = ec.hostname;
         } else {
             token.host = ec.ip;
         }
 
-        token.host += ':' + ec.port;
+        if (ec.via_port !== 0) {
+            token.host += ':' + ec.via_port;
+        } else {
+            token.host += ':' + ec.port;
+	}
 
         dataAccess.token.create(token, function(id) {
             getTokenString(id, token)

source/portal/index.js

@@ -21,6 +21,8 @@ config.portal = config.portal || {};
 config.portal.ip_address = config.portal.ip_address || '';
 config.portal.hostname = config.portal.hostname|| '';
 config.portal.port = config.portal.port || 8080;
+config.portal.via_address = config.portal.via_address || '';
+config.portal.via_port = config.portal.via_port || 0;
 config.portal.ssl = config.portal.ssl || false;
 config.portal.force_tls_v12 = config.portal.force_tls_v12 || false;
 config.portal.reconnection_ticket_lifetime = config.portal.reconnection_ticket_lifetime || 600;
@@ -51,6 +53,14 @@ if (config.portal.hostname.indexOf('$') == 0) {
     config.portal.hostname = process.env[config.portal.hostname.substr(1)];
     log.info('ENV: config.portal.hostname=' + config.portal.hostname);
 }
+if(process.env.owt_via_address != undefined) {
+    config.portal.via_address = process.env.owt_via_address;
+    log.info('ENV: config.portal.via_address=' + config.portal.via_address);
+}
+if(process.env.owt_via_port != undefined) {
+    config.portal.via_port = process.env.owt_via_port;
+    log.info('ENV: config.portal.via_port=' + config.portal.via_port);
+}
 
 global.config = config;
 
@@ -136,6 +146,8 @@ var joinCluster = function (on_ok) {
               info: {ip: ip_address,
                      hostname: config.portal.hostname,
                      port: config.portal.port,
+                     via_address: config.portal.via_address,
+                     via_port: config.portal.via_port,
                      ssl: config.portal.ssl,
                      state: 2,
                      max_load: config.cluster.max_load,