diff --git a/ShadowsocksX-NG/HTTPUserProxy.swift b/ShadowsocksX-NG/HTTPUserProxy.swift
index cfc4c15b..67330baf 100644
--- a/ShadowsocksX-NG/HTTPUserProxy.swift
+++ b/ShadowsocksX-NG/HTTPUserProxy.swift
@@ -12,7 +12,7 @@ import GCDWebServer
 class HTTPUserProxy{
     static let shard = HTTPUserProxy()
     
-    let adapter = APIAdapter()
+    let app = AppFacade()
     
     let server = GCDWebServer()
     let api_port:UInt = 9528
@@ -55,7 +55,7 @@ class HTTPUserProxy{
     
     func addHandler_getStatus() {
         server.addHandler(forMethod: "GET", path: "/status", request: GCDWebServerRequest.self, processBlock: {request in
-            return GCDWebServerDataResponse(jsonObject: ["Enable":self.adapter.getStatus()], contentType: "json")
+            return GCDWebServerDataResponse(jsonObject: ["Enable":self.app.getStatus()], contentType: "json")
         })
     }
     
@@ -63,12 +63,12 @@ class HTTPUserProxy{
         server.addHandler(forMethod: "PUT", path: "/status", request: GCDWebServerURLEncodedFormRequest.self, processBlock: {request in
             if let targetStatus_str = (request as? GCDWebServerURLEncodedFormRequest)?.arguments["Enable"] as? String{
                 if let targetStatus = Bool(targetStatus_str) {
-                    self.adapter.setStatus(status: targetStatus)
+                    self.app.setStatus(status: targetStatus)
                     return GCDWebServerResponse()
                 }
             }
             else {
-                self.adapter.toggleStatus()
+                self.app.toggleStatus()
                 return GCDWebServerResponse()
             }
             return GCDWebServerResponse(statusCode: 400)
@@ -77,14 +77,14 @@ class HTTPUserProxy{
     
     func addHandler_getServerList() {
         server.addHandler(forMethod: "GET", path: "/servers", request: GCDWebServerRequest.self, processBlock: {request in
-            return GCDWebServerDataResponse(jsonObject: self.adapter.getServerList(), contentType: "json")
+            return GCDWebServerDataResponse(jsonObject: self.app.getServerList(), contentType: "json")
         })
     }
     
     func addHandler_getCurrentServer() {
         server.addHandler(forMethod: "GET", path: "/current", request: GCDWebServerRequest.self, processBlock: {request in
-            if let activeId = self.adapter.getCurrentServerId() {
-                return GCDWebServerDataResponse(jsonObject: self.adapter.getServer(uuid: activeId)!, contentType: "json")
+            if let activeId = self.app.getCurrentServerId() {
+                return GCDWebServerDataResponse(jsonObject: self.app.getServer(uuid: activeId)!, contentType: "json")
             }
             else {
                 return GCDWebServerResponse(statusCode: 404);
@@ -96,8 +96,8 @@ class HTTPUserProxy{
         server.addHandler(forMethod: "PUT", path: "/current", request: GCDWebServerURLEncodedFormRequest.self, processBlock: {request in
             
             if let targetId = (request as? GCDWebServerURLEncodedFormRequest)?.arguments["Id"] as? String{
-                if self.adapter.getServer(uuid: targetId) != nil {
-                    self.adapter.setCurrentServer(uuid: targetId);
+                if self.app.getServer(uuid: targetId) != nil {
+                    self.app.setCurrentServer(uuid: targetId);
                     return GCDWebServerResponse()
                 }
             }
@@ -111,7 +111,7 @@ class HTTPUserProxy{
                 if (server["ServerPort"] != nil) {
                     server["ServerPort"] = UInt16(server["ServerPort"] as! String)
                     if (Validator.profile(server)) { // validate
-                        self.adapter.addServer(server: server)
+                        self.app.addServer(server: server)
                         return GCDWebServerResponse();
                     }
                 }
@@ -127,10 +127,10 @@ class HTTPUserProxy{
                 if (server["ServerPort"] != nil) {
                     server["ServerPort"] = UInt16(server["ServerPort"] as! String)
                 }
-                if (self.adapter.getServer(uuid: id) != nil) {
+                if (self.app.getServer(uuid: id) != nil) {
                     if (Validator.existAttributes(server)) {
-                        if (self.adapter.getCurrentServerId() != id) {
-                            self.adapter.modifyServer(uuid: id, server: server)
+                        if (self.app.getCurrentServerId() != id) {
+                            self.app.modifyServer(uuid: id, server: server)
                             return GCDWebServerResponse()
                         }
                         else {
@@ -149,9 +149,9 @@ class HTTPUserProxy{
         server.addHandler(forMethod: "DELETE", pathRegex: "/servers/"+self.UUID_REGEX, request: GCDWebServerRequest.self
             , processBlock: {request in
                 let id = String(request.path.dropFirst("/servers/".count))
-                if((self.adapter.getServer(uuid: id)) != nil) {
-                    if (self.adapter.getCurrentServerId() != id) {
-                        self.adapter.deleteServer(uuid: id)
+                if((self.app.getServer(uuid: id)) != nil) {
+                    if (self.app.getCurrentServerId() != id) {
+                        self.app.deleteServer(uuid: id)
                         return GCDWebServerResponse()
                     } else {
                         return GCDWebServerResponse(statusCode: 400)
@@ -165,7 +165,7 @@ class HTTPUserProxy{
     
     func addHandler_getMode() {
         server.addHandler(forMethod: "GET", path: "/mode", request: GCDWebServerRequest.self, processBlock: {request in
-            return GCDWebServerDataResponse(jsonObject: ["Mode":self.adapter.getMode().rawValue], contentType: "json")
+            return GCDWebServerDataResponse(jsonObject: ["Mode":self.app.getMode().rawValue], contentType: "json")
         })
     }
     
@@ -173,7 +173,7 @@ class HTTPUserProxy{
         server.addHandler(forMethod: "PUT", path: "/mode", request: GCDWebServerURLEncodedFormRequest.self, processBlock: {request in
             if let mode_str = (request as? GCDWebServerURLEncodedFormRequest)?.arguments["Mode"] as? String{
                 if let mode = ProxyType(rawValue: mode_str) {
-                    self.adapter.setMode(mode: mode);
+                    self.app.setMode(mode: mode);
                     
                     return GCDWebServerResponse()
                 }
@@ -183,10 +183,10 @@ class HTTPUserProxy{
     }
 }
 
-class APIAdapter {
-    let SerMgr = ServerProfileManager.instance
-    let defaults = UserDefaults.standard
-    let appdeleget = NSApplication.shared.delegate as! AppDelegate
+class AppFacade {
+    private let SerMgr = ServerProfileManager.instance
+    private let defaults = UserDefaults.standard
+    private let appdeleget = NSApplication.shared.delegate as! AppDelegate
     
     func getStatus()->Bool {
         return self.defaults.bool(forKey: "ShadowsocksOn");