diff --git a/index.js b/index.js
index e169b32..0ada8ff 100644
--- a/index.js
+++ b/index.js
@@ -1,120 +1,10 @@
 'use strict';
 
-const Application = require('./src/app');
+const { Application, KoaApplication } = require('./src/apps');
 const Controller = require('./src/controller');
-const KoaBodyParser = require('koa-bodyparser');
 const { Router } = require('./src/router');
-const { printer } = require('@axiosleo/cli-tool');
 const response = require('./src/response');
-const session = require('koa-session');
-const KoaStaticServer = require('koa-static-server');
-const path = require('path');
-const Koa = require('koa');
 const Model = require('./src/model');
-const { dispatcher } = require('./src/core');
-const { _assign } = require('@axiosleo/cli-tool/src/helper/obj');
-const multer = require('@koa/multer');
-
-/**
- * @param {import('./index').KoaContext} context 
- */
-const handleRes = (context) => {
-  let response = context.response;
-  if (response.format === 'json' && response.notResolve !== true) {
-    let code, message;
-    if (response.code) {
-      [code, message] = response.code.split(';');
-    }
-    response.data = {
-      request_id: context.request_id,
-      timestamp: (new Date()).getTime(),
-      code: code || `${response.status}`,
-      message: message || context.response.message,
-      data: response.data,
-    };
-  }
-  context.koa.type = response.format;
-  Object.keys(response.headers).forEach(k => {
-    context.koa.set(k, response.headers[k]);
-  });
-  context.koa.body = response.data || '';
-  context.koa.response.status = response.status;
-};
-
-class KoaApplication extends Application {
-  constructor(config = {}) {
-    config = _assign({
-      port: 8080,
-      listen_host: 'localhost',
-      debug: false,
-      routers: [],
-      app_id: '',
-      // session_key: '',
-      session: {
-        /** (number || 'session') maxAge in ms (default is 1 days) */
-        /** 'session' will result in a cookie that expires when session/browser is closed */
-        /** Warning: If a session cookie is stolen, this cookie will never expire */
-        maxAge: 1296000000, // ms, 15 days
-        // autoCommit: true, /** (boolean) automatically commit headers (default true) */
-        overwrite: true, /** (boolean) can overwrite or not (default true) */
-        httpOnly: true, /** (boolean) httpOnly or not (default true) */
-        signed: true, /** (boolean) signed or not (default true) */
-        rolling: false, /** (boolean) Force a session identifier cookie to be set on every response. The expiration is reset to the original maxAge, resetting the expiration countdown. (default is false) */
-        renew: true, /** (boolean) renew session when session is nearly expired, so we can always keep user logged in. (default is false)*/
-        // secure: process.env.DEBUG ? false : true, /** (boolean) secure cookie*/
-        secure: false,
-        // sameSite: null, /** (string) session cookie sameSite options (default null, don't set it) */
-      },
-      static: {
-        rootDir: path.join(__dirname, './public'),
-      },
-      body_parser: {}
-    }, config);
-
-    printer.println().green('start on ').println(`http://localhost:${config.port}`).println();
-    super(config);
-    this.koa = new Koa(this.config.server);
-
-    // session middleware
-    if (this.config.session) {
-      this.koa.keys = [this.app_id];
-      this.koa.use(session({
-        key: this.config.session_key || 'koa.sess', /** (string) cookie key (default is koa.sess) */
-        ...this.config.session
-      }, this.koa));
-    }
-
-    ['a', 'b', 'c'].forEach((item, index) => {
-      index;
-    });
-
-    const upload = multer();
-    this.koa.use(upload.any());
-
-    // body parser
-    this.koa.use(KoaBodyParser(this.config.body_parser));
-
-    // dispatcher request
-    this.koa.use(dispatcher({
-      app: this,
-      app_id: this.app_id,
-      workflow: this.workflow,
-      routes: this.routes
-    }));
-
-    // koa static services
-    if (this.config.static) {
-      this.koa.use(KoaStaticServer(this.config.static));
-    }
-    this.on('response', handleRes);
-  }
-
-  async start() {
-    this.emit('starting');
-    // set '0.0.0.0' for public access
-    this.koa.listen(this.config.port, this.config.listen_host);
-  }
-}
 
 module.exports = {
   Controller,
diff --git a/src/app.js b/src/apps/app.js
similarity index 87%
rename from src/app.js
rename to src/apps/app.js
index 4c9ea29..d77b076 100644
--- a/src/app.js
+++ b/src/apps/app.js
@@ -2,10 +2,9 @@
 
 const EventEmitter = require('events');
 const { v4 } = require('uuid');
-
 const { Configuration, Workflow } = require('@axiosleo/cli-tool');
-const { resolveRouters } = require('./core');
-const flowOperator = require('./workflow');
+const { resolveRouters } = require('../core');
+const flowOperator = require('../workflow');
 
 class Application extends EventEmitter {
   constructor(config) {
diff --git a/src/apps/index.js b/src/apps/index.js
new file mode 100644
index 0000000..7b8687a
--- /dev/null
+++ b/src/apps/index.js
@@ -0,0 +1,11 @@
+'use strict';
+
+const Application = require('./app');
+const KoaApplication = require('./koa');
+const SocketApplication = require('./koa');
+
+module.exports = {
+  Application,
+  KoaApplication,
+  SocketApplication
+};
diff --git a/src/apps/koa.js b/src/apps/koa.js
new file mode 100644
index 0000000..cd4d79b
--- /dev/null
+++ b/src/apps/koa.js
@@ -0,0 +1,116 @@
+'use strict';
+
+const KoaBodyParser = require('koa-bodyparser');
+const session = require('koa-session');
+const KoaStaticServer = require('koa-static-server');
+const multer = require('@koa/multer');
+const path = require('path');
+const Koa = require('koa');
+const { dispatcher } = require('../core');
+const { printer } = require('@axiosleo/cli-tool');
+const { _assign } = require('@axiosleo/cli-tool/src/helper/obj');
+
+const Application = require('./app');
+
+/**
+ * @param {import('./index').KoaContext} context 
+ */
+const handleRes = (context) => {
+  let response = context.response;
+  if (response.format === 'json' && response.notResolve !== true) {
+    let code, message;
+    if (response.code) {
+      [code, message] = response.code.split(';');
+    }
+    response.data = {
+      request_id: context.request_id,
+      timestamp: (new Date()).getTime(),
+      code: code || `${response.status}`,
+      message: message || context.response.message,
+      data: response.data,
+    };
+  }
+  context.koa.type = response.format;
+  Object.keys(response.headers).forEach(k => {
+    context.koa.set(k, response.headers[k]);
+  });
+  context.koa.body = response.data || '';
+  context.koa.response.status = response.status;
+};
+
+class KoaApplication extends Application {
+  constructor(config = {}) {
+    config = _assign({
+      port: 8080,
+      listen_host: 'localhost',
+      debug: false,
+      routers: [],
+      app_id: '',
+      // session_key: '',
+      session: {
+        /** (number || 'session') maxAge in ms (default is 1 days) */
+        /** 'session' will result in a cookie that expires when session/browser is closed */
+        /** Warning: If a session cookie is stolen, this cookie will never expire */
+        maxAge: 1296000000, // ms, 15 days
+        // autoCommit: true, /** (boolean) automatically commit headers (default true) */
+        overwrite: true, /** (boolean) can overwrite or not (default true) */
+        httpOnly: true, /** (boolean) httpOnly or not (default true) */
+        signed: true, /** (boolean) signed or not (default true) */
+        rolling: false, /** (boolean) Force a session identifier cookie to be set on every response. The expiration is reset to the original maxAge, resetting the expiration countdown. (default is false) */
+        renew: true, /** (boolean) renew session when session is nearly expired, so we can always keep user logged in. (default is false)*/
+        // secure: process.env.DEBUG ? false : true, /** (boolean) secure cookie*/
+        secure: false,
+        // sameSite: null, /** (string) session cookie sameSite options (default null, don't set it) */
+      },
+      static: {
+        rootDir: path.join(__dirname, './public'),
+      },
+      body_parser: {}
+    }, config);
+
+    printer.println().green('start on ').println(`http://localhost:${config.port}`).println();
+    super(config);
+    this.koa = new Koa(this.config.server);
+
+    // session middleware
+    if (this.config.session) {
+      this.koa.keys = [this.app_id];
+      this.koa.use(session({
+        key: this.config.session_key || 'koa.sess', /** (string) cookie key (default is koa.sess) */
+        ...this.config.session
+      }, this.koa));
+    }
+
+    ['a', 'b', 'c'].forEach((item, index) => {
+      index;
+    });
+
+    const upload = multer();
+    this.koa.use(upload.any());
+
+    // body parser
+    this.koa.use(KoaBodyParser(this.config.body_parser));
+
+    // dispatcher request
+    this.koa.use(dispatcher({
+      app: this,
+      app_id: this.app_id,
+      workflow: this.workflow,
+      routes: this.routes
+    }));
+
+    // koa static services
+    if (this.config.static) {
+      this.koa.use(KoaStaticServer(this.config.static));
+    }
+    this.on('response', handleRes);
+  }
+
+  async start() {
+    this.emit('starting');
+    // set '0.0.0.0' for public access
+    this.koa.listen(this.config.port, this.config.listen_host);
+  }
+}
+
+module.exports = KoaApplication;