Node.js: introducing websocket support.

15 files changed, 2373 insertions, 175 deletions

diff --git a/src/nodejs/unit-http/http.js b/src/nodejs/unit-http/http.js
index 3a25fa2f..3a25fa2f 100755..100644
--- a/src/nodejs/unit-http/http.js
+++ b/src/nodejs/unit-http/http.js
diff --git a/src/nodejs/unit-http/http_server.js b/src/nodejs/unit-http/http_server.js
index 0fe5dd34..c42149a5 100755..100644
--- a/src/nodejs/unit-http/http_server.js
+++ b/src/nodejs/unit-http/http_server.js
@@ -8,16 +8,21 @@
 const EventEmitter = require('events');
 const http = require('http');
 const util = require('util');
-const unit_lib = require('unit-http/build/Release/unit-http.node');
-const unit_socket = require('unit-http/socket');
-
-const { Socket } = unit_socket;
+const unit_lib = require('./build/Release/unit-http');
+const Socket = require('./socket');
+const WebSocketFrame = require('./websocket_frame');
 
 
 function ServerResponse(req) {
     EventEmitter.call(this);
 
     this.headers = {};
+
+    this.server = req.server;
+    this._request = req;
+    req._response = this;
+    this.socket = req.socket;
+    this.connection = req.connection;
 }
 util.inherits(ServerResponse, EventEmitter);
 
@@ -207,15 +212,23 @@ ServerResponse.prototype._implicitHeader = function _implicitHeader() {
     this.writeHead(this.statusCode);
 };
 
-ServerResponse.prototype._writeBody = function(chunk, encoding, callback) {
-    var contentLength = 0;
+ServerResponse.prototype._send_headers = unit_lib.response_send_headers;
 
+ServerResponse.prototype._sendHeaders = function _sendHeaders() {
     if (!this.headersSent) {
-        unit_lib.unit_response_headers(this, this.statusCode, this.headers,
-                                       this.headers_count, this.headers_len);
+        this._send_headers(this.statusCode, this.headers, this.headers_count,
+                           this.headers_len);
 
         this.headersSent = true;
     }
+};
+
+ServerResponse.prototype._write = unit_lib.response_write;
+
+ServerResponse.prototype._writeBody = function(chunk, encoding, callback) {
+    var contentLength = 0;
+
+    this._sendHeaders();
 
     if (typeof chunk === 'function') {
         callback = chunk;
@@ -238,7 +251,7 @@ ServerResponse.prototype._writeBody = function(chunk, encoding, callback) {
             contentLength = chunk.length;
         }
 
-        unit_lib.unit_response_write(this, chunk, contentLength);
+        this._write(chunk, contentLength);
     }
 
     if (typeof callback === 'function') {
@@ -268,11 +281,13 @@ ServerResponse.prototype.write = function write(chunk, encoding, callback) {
     return true;
 };
 
+ServerResponse.prototype._end = unit_lib.response_end;
+
 ServerResponse.prototype.end = function end(chunk, encoding, callback) {
     if (!this.finished) {
         this._writeBody(chunk, encoding, callback);
 
-        unit_lib.unit_response_end(this);
+        this._end();
 
         this.finished = true;
     }
@@ -280,10 +295,12 @@ ServerResponse.prototype.end = function end(chunk, encoding, callback) {
     return this;
 };
 
-function ServerRequest(server) {
+function ServerRequest(server, socket) {
     EventEmitter.call(this);
 
     this.server = server;
+    this.socket = socket;
+    this.connection = socket;
 }
 util.inherits(ServerRequest, EventEmitter);
 
@@ -339,8 +356,8 @@ ServerRequest.prototype.on = function on(ev, fn) {
 
     if (ev === "data") {
         process.nextTick(function () {
-            if (this.server.buffer.length !== 0) {
-                this.emit("data", this.server.buffer);
+            if (this._data.length !== 0) {
+                this.emit("data", this._data);
             }
 
         }.bind(this));
@@ -357,14 +374,27 @@ function Server(requestListener) {
 
     this.unit.createServer();
 
-    this.socket = Socket;
-    this.request = ServerRequest;
-    this.response = ServerResponse;
+    this.Socket = Socket;
+    this.ServerRequest = ServerRequest;
+    this.ServerResponse = ServerResponse;
+    this.WebSocketFrame = WebSocketFrame;
 
     if (requestListener) {
         this.on('request', requestListener);
     }
+
+    this._upgradeListenerCount = 0;
+    this.on('newListener', function(ev) {
+        if (ev === 'upgrade'){
+            this._upgradeListenerCount++;
+        }
+      }).on('removeListener', function(ev) {
+        if (ev === 'upgrade') {
+            this._upgradeListenerCount--;
+        }
+    });
 }
+
 util.inherits(Server, EventEmitter);
 
 Server.prototype.setTimeout = function setTimeout(msecs, callback) {
@@ -381,15 +411,13 @@ Server.prototype.listen = function () {
     this.unit.listen();
 };
 
-Server.prototype.emit_events = function (server, req, res) {
-    req.server = server;
-    res.server = server;
-    req.res = res;
-    res.req = req;
-
-    server.buffer = server.unit._read(req.socket.req_pointer);
+Server.prototype.emit_request = function (req, res) {
+    if (req._websocket_handshake && this._upgradeListenerCount > 0) {
+        this.emit('upgrade', req, req.socket);
 
-    server.emit("request", req, res);
+    } else {
+        this.emit("request", req, res);
+    }
 
     process.nextTick(() => {
         req.emit("finish");
diff --git a/src/nodejs/unit-http/nxt_napi.h b/src/nodejs/unit-http/nxt_napi.h
index 9bcf3a21..d9721a40 100644
--- a/src/nodejs/unit-http/nxt_napi.h
+++ b/src/nodejs/unit-http/nxt_napi.h
@@ -188,6 +188,21 @@ struct nxt_napi {
     }
 
 
+    inline void *
+    get_buffer_info(napi_value val, size_t &size)
+    {
+        void         *res;
+        napi_status  status;
+
+        status = napi_get_buffer_info(env_, val, &res, &size);
+        if (status != napi_ok) {
+            throw exception("Failed to get buffer info");
+        }
+
+        return res;
+    }
+
+
     inline napi_value
     get_cb_info(napi_callback_info info, size_t &argc, napi_value *argv)
     {
@@ -219,6 +234,23 @@ struct nxt_napi {
 
 
     inline napi_value
+    get_cb_info(napi_callback_info info, napi_value &arg)
+    {
+        size_t       argc;
+        napi_value   res;
+
+        argc = 1;
+        res = get_cb_info(info, argc, &arg);
+
+        if (argc != 1) {
+            throw exception("Wrong args count. Expected 1");
+        }
+
+        return res;
+    }
+
+
+    inline napi_value
     get_element(napi_value obj, uint32_t i)
     {
         napi_value   res;
@@ -311,15 +343,22 @@ struct nxt_napi {
     inline nxt_unit_request_info_t *
     get_request_info(napi_value obj)
     {
-        int64_t      n;
+        return (nxt_unit_request_info_t *) unwrap(obj);
+    }
+
+
+    inline uint32_t
+    get_value_bool(napi_value obj)
+    {
+        bool         res;
         napi_status  status;
 
-        status = napi_get_value_int64(env_, obj, &n);
+        status = napi_get_value_bool(env_, obj, &res);
         if (status != napi_ok) {
-            throw exception("Failed to get request pointer");
+            throw exception("Failed to get bool");
         }
 
-        return (nxt_unit_request_info_t *) (intptr_t) n;
+        return res;
     }
 
 
@@ -353,6 +392,21 @@ struct nxt_napi {
     }
 
 
+    inline size_t
+    get_value_string_utf8(napi_value val, char *buf, size_t bufsize)
+    {
+        size_t       res;
+        napi_status  status;
+
+        status = napi_get_value_string_utf8(env_, val, buf, bufsize, &res);
+        if (status != napi_ok) {
+            throw exception("Failed to get string utf8");
+        }
+
+        return res;
+    }
+
+
     inline bool
     is_array(napi_value val)
     {
@@ -368,6 +422,21 @@ struct nxt_napi {
     }
 
 
+    inline bool
+    is_buffer(napi_value val)
+    {
+        bool         res;
+        napi_status  status;
+
+        status = napi_is_buffer(env_, val, &res);
+        if (status != napi_ok) {
+            throw exception("Failed to confirm value is buffer");
+        }
+
+        return res;
+    }
+
+
     inline napi_value
     make_callback(napi_async_context ctx, napi_value val, napi_value func,
         int argc, const napi_value *argv)
@@ -398,6 +467,41 @@ struct nxt_napi {
 
 
     inline napi_value
+    make_callback(napi_async_context ctx, napi_value val, napi_value func)
+    {
+        return make_callback(ctx, val, func, 0, NULL);
+    }
+
+
+    inline napi_value
+    make_callback(napi_async_context ctx, napi_value val, napi_value func,
+        napi_value arg1)
+    {
+        return make_callback(ctx, val, func, 1, &arg1);
+    }
+
+
+    inline napi_value
+    make_callback(napi_async_context ctx, napi_value val, napi_value func,
+        napi_value arg1, napi_value arg2)
+    {
+        napi_value  args[2] = { arg1, arg2 };
+
+        return make_callback(ctx, val, func, 2, args);
+    }
+
+
+    inline napi_value
+    make_callback(napi_async_context ctx, napi_value val, napi_value func,
+        napi_value arg1, napi_value arg2, napi_value arg3)
+    {
+        napi_value  args[3] = { arg1, arg2, arg3 };
+
+        return make_callback(ctx, val, func, 3, args);
+    }
+
+
+    inline napi_value
     new_instance(napi_value ctor)
     {
         napi_value   res;
@@ -427,6 +531,22 @@ struct nxt_napi {
     }
 
 
+    inline napi_value
+    new_instance(napi_value ctor, napi_value param1, napi_value param2)
+    {
+        napi_value   res;
+        napi_status  status;
+        napi_value   param[2] = { param1, param2 };
+
+        status = napi_new_instance(env_, ctor, 2, param, &res);
+        if (status != napi_ok) {
+            throw exception("Failed to create instance");
+        }
+
+        return res;
+    }
+
+
     inline void
     set_element(napi_value obj, uint32_t i, napi_value val)
     {
@@ -472,8 +592,46 @@ struct nxt_napi {
     }
 
 
+    template<typename T>
     inline void
-    set_named_property(napi_value obj, const char *name, intptr_t val)
+    set_named_property(napi_value obj, const char *name, T val)
+    {
+        set_named_property(obj, name, create(val));
+    }
+
+
+    inline napi_value
+    create(int32_t val)
+    {
+        napi_value   ptr;
+        napi_status  status;
+
+        status = napi_create_int32(env_, val, &ptr);
+        if (status != napi_ok) {
+            throw exception("Failed to create int32");
+        }
+
+        return ptr;
+    }
+
+
+    inline napi_value
+    create(uint32_t val)
+    {
+        napi_value   ptr;
+        napi_status  status;
+
+        status = napi_create_uint32(env_, val, &ptr);
+        if (status != napi_ok) {
+            throw exception("Failed to create uint32");
+        }
+
+        return ptr;
+    }
+
+
+    inline napi_value
+    create(int64_t val)
     {
         napi_value   ptr;
         napi_status  status;
@@ -483,7 +641,32 @@ struct nxt_napi {
             throw exception("Failed to create int64");
         }
 
-        set_named_property(obj, name, ptr);
+        return ptr;
+    }
+
+
+    inline void
+    remove_wrap(napi_ref& ref)
+    {
+        if (ref != nullptr) {
+            remove_wrap(get_reference_value(ref));
+            ref = nullptr;
+        }
+    }
+
+
+    inline void *
+    remove_wrap(napi_value val)
+    {
+        void         *res;
+        napi_status  status;
+
+        status = napi_remove_wrap(env_, val, &res);
+        if (status != napi_ok) {
+            throw exception("Failed to remove_wrap");
+        }
+
+        return res;
     }
 
 
diff --git a/src/nodejs/unit-http/package.json b/src/nodejs/unit-http/package.json
index 6a6c00b4..7ee01346 100644
--- a/src/nodejs/unit-http/package.json
+++ b/src/nodejs/unit-http/package.json
@@ -14,7 +14,14 @@
         "package.json",
         "socket.js",
         "binding.gyp",
-        "README.md"
+        "README.md",
+        "websocket.js",
+        "websocket_connection.js",
+        "websocket_frame.js",
+        "websocket_request.js",
+        "websocket_router.js",
+        "websocket_router_request.js",
+        "websocket_server.js"
     ],
     "scripts": {
         "clean": "node-gyp clean",
diff --git a/src/nodejs/unit-http/socket.js b/src/nodejs/unit-http/socket.js
index 6e836949..b1a3abb8 100755..100644
--- a/src/nodejs/unit-http/socket.js
+++ b/src/nodejs/unit-http/socket.js
@@ -7,7 +7,7 @@
 
 const EventEmitter = require('events');
 const util = require('util');
-const unit_lib = require('unit-http/build/Release/unit-http.node');
+const unit_lib = require('./build/Release/unit-http');
 
 function Socket(options) {
     EventEmitter.call(this);
@@ -89,7 +89,7 @@ Socket.prototype.setTimeout = function setTimeout(timeout, callback) {
 
     this.timeout = timeout;
 
-    this.on('timeout', callback);
+    // this.on('timeout', callback);
 
     return this;
 };
@@ -101,6 +101,4 @@ Socket.prototype.write = function write(data, encoding, callback) {
 };
 
 
-module.exports = {
-    Socket
-};
+module.exports = Socket;
diff --git a/src/nodejs/unit-http/unit.cpp b/src/nodejs/unit-http/unit.cpp
index 3f66189a..ac10024c 100644
--- a/src/nodejs/unit-http/unit.cpp
+++ b/src/nodejs/unit-http/unit.cpp
@@ -10,6 +10,8 @@
 
 #include <uv.h>
 
+#include <nxt_unit_websocket.h>
+
 
 napi_ref Unit::constructor_;
 
@@ -20,17 +22,27 @@ struct nxt_nodejs_ctx_t {
 };
 
 
+struct req_data_t {
+    napi_ref  sock_ref;
+    napi_ref  resp_ref;
+    napi_ref  conn_ref;
+};
+
+
 Unit::Unit(napi_env env, napi_value jsthis):
     nxt_napi(env),
     wrapper_(wrap(jsthis, this, destroy)),
     unit_ctx_(nullptr)
 {
+    nxt_unit_debug(NULL, "Unit::Unit()");
 }
 
 
 Unit::~Unit()
 {
     delete_reference(wrapper_);
+
+    nxt_unit_debug(NULL, "Unit::~Unit()");
 }
 
 
@@ -38,23 +50,26 @@ napi_value
 Unit::init(napi_env env, napi_value exports)
 {
     nxt_napi    napi(env);
-    napi_value  cons;
+    napi_value  ctor;
 
-    napi_property_descriptor  properties[] = {
+    napi_property_descriptor  unit_props[] = {
         { "createServer", 0, create_server, 0, 0, 0, napi_default, 0 },
         { "listen", 0, listen, 0, 0, 0, napi_default, 0 },
-        { "_read", 0, _read, 0, 0, 0, napi_default, 0 }
     };
 
     try {
-        cons = napi.define_class("Unit", create, 3, properties);
-        constructor_ = napi.create_reference(cons);
+        ctor = napi.define_class("Unit", create, 2, unit_props);
+        constructor_ = napi.create_reference(ctor);
 
-        napi.set_named_property(exports, "Unit", cons);
-        napi.set_named_property(exports, "unit_response_headers",
+        napi.set_named_property(exports, "Unit", ctor);
+        napi.set_named_property(exports, "response_send_headers",
                                 response_send_headers);
-        napi.set_named_property(exports, "unit_response_write", response_write);
-        napi.set_named_property(exports, "unit_response_end", response_end);
+        napi.set_named_property(exports, "response_write", response_write);
+        napi.set_named_property(exports, "response_end", response_end);
+        napi.set_named_property(exports, "websocket_send_frame",
+                                websocket_send_frame);
+        napi.set_named_property(exports, "websocket_set_sock",
+                                websocket_set_sock);
 
     } catch (exception &e) {
         napi.throw_error(e);
@@ -78,7 +93,7 @@ napi_value
 Unit::create(napi_env env, napi_callback_info info)
 {
     nxt_napi    napi(env);
-    napi_value  target, cons, instance, jsthis;
+    napi_value  target, ctor, instance, jsthis;
 
     try {
         target = napi.get_new_target(info);
@@ -94,8 +109,8 @@ Unit::create(napi_env env, napi_callback_info info)
         }
 
         /* Invoked as plain function `Unit(...)`, turn into construct call. */
-        cons = napi.get_reference_value(constructor_);
-        instance = napi.new_instance(cons);
+        ctor = napi.get_reference_value(constructor_);
+        instance = napi.new_instance(ctor);
         napi.create_reference(instance);
 
     } catch (exception &e) {
@@ -130,10 +145,14 @@ Unit::create_server(napi_env env, napi_callback_info info)
     memset(&unit_init, 0, sizeof(nxt_unit_init_t));
 
     unit_init.data = obj;
-    unit_init.callbacks.request_handler = request_handler;
-    unit_init.callbacks.add_port        = add_port;
-    unit_init.callbacks.remove_port     = remove_port;
-    unit_init.callbacks.quit            = quit;
+    unit_init.callbacks.request_handler   = request_handler_cb;
+    unit_init.callbacks.websocket_handler = websocket_handler_cb;
+    unit_init.callbacks.close_handler     = close_handler_cb;
+    unit_init.callbacks.add_port          = add_port;
+    unit_init.callbacks.remove_port       = remove_port;
+    unit_init.callbacks.quit              = quit_cb;
+
+    unit_init.request_data_size = sizeof(req_data_t);
 
     obj->unit_ctx_ = nxt_unit_init(&unit_init);
     if (obj->unit_ctx_ == NULL) {
@@ -157,74 +176,139 @@ Unit::listen(napi_env env, napi_callback_info info)
 }
 
 
-napi_value
-Unit::_read(napi_env env, napi_callback_info info)
+void
+Unit::request_handler_cb(nxt_unit_request_info_t *req)
 {
-    void                     *data;
-    size_t                   argc;
-    nxt_napi                 napi(env);
-    napi_value               buffer, argv;
-    nxt_unit_request_info_t  *req;
+    Unit  *obj;
 
-    argc = 1;
+    obj = reinterpret_cast<Unit *>(req->unit->data);
+
+    obj->request_handler(req);
+}
+
+
+void
+Unit::request_handler(nxt_unit_request_info_t *req)
+{
+    napi_value  socket, request, response, server_obj, emit_request;
+
+    memset(req->data, 0, sizeof(req_data_t));
 
     try {
-        napi.get_cb_info(info, argc, &argv);
+        nxt_handle_scope  scope(env());
+
+        server_obj = get_server_object();
+
+        socket = create_socket(server_obj, req);
+        request = create_request(server_obj, socket);
+        response = create_response(server_obj, request, req);
+
+        create_headers(req, request);
 
-        req = napi.get_request_info(argv);
-        buffer = napi.create_buffer((size_t) req->content_length, &data);
+        emit_request = get_named_property(server_obj, "emit_request");
+
+        nxt_async_context   async_context(env(), "request_handler");
+        nxt_callback_scope  async_scope(async_context);
+
+        make_callback(async_context, server_obj, emit_request, request,
+                      response);
 
     } catch (exception &e) {
-        napi.throw_error(e);
-        return nullptr;
+        nxt_unit_req_warn(req, "request_handler: %s", e.str);
     }
+}
 
-    nxt_unit_request_read(req, data, req->content_length);
 
-    return buffer;
+void
+Unit::websocket_handler_cb(nxt_unit_websocket_frame_t *ws)
+{
+    Unit  *obj;
+
+    obj = reinterpret_cast<Unit *>(ws->req->unit->data);
+
+    obj->websocket_handler(ws);
 }
 
 
 void
-Unit::request_handler(nxt_unit_request_info_t *req)
+Unit::websocket_handler(nxt_unit_websocket_frame_t *ws)
 {
-    Unit         *obj;
-    napi_value   socket, request, response, server_obj;
-    napi_value   emit_events;
-    napi_value   events_args[3];
+    napi_value  frame, server_obj, process_frame, conn;
+    req_data_t  *req_data;
 
-    obj = reinterpret_cast<Unit *>(req->unit->data);
+    req_data = (req_data_t *) ws->req->data;
 
     try {
-        nxt_handle_scope  scope(obj->env());
-
-        server_obj = obj->get_server_object();
+        nxt_handle_scope  scope(env());
 
-        socket = obj->create_socket(server_obj, req);
-        request = obj->create_request(server_obj, socket);
-        response = obj->create_response(server_obj, socket, request, req);
+        server_obj = get_server_object();
 
-        obj->create_headers(req, request);
+        frame = create_websocket_frame(server_obj, ws);
 
-        emit_events = obj->get_named_property(server_obj, "emit_events");
+        conn = get_reference_value(req_data->conn_ref);
 
-        events_args[0] = server_obj;
-        events_args[1] = request;
-        events_args[2] = response;
+        process_frame = get_named_property(conn, "processFrame");
 
-        nxt_async_context   async_context(obj->env(), "unit_request_handler");
+        nxt_async_context   async_context(env(), "websocket_handler");
         nxt_callback_scope  async_scope(async_context);
 
-        obj->make_callback(async_context, server_obj, emit_events,
-                           3, events_args);
+        make_callback(async_context, conn, process_frame, frame);
 
     } catch (exception &e) {
-        obj->throw_error(e);
+        nxt_unit_req_warn(ws->req, "websocket_handler: %s", e.str);
     }
+
+    nxt_unit_websocket_done(ws);
+}
+
+
+void
+Unit::close_handler_cb(nxt_unit_request_info_t *req)
+{
+    Unit  *obj;
+
+    obj = reinterpret_cast<Unit *>(req->unit->data);
+
+    obj->close_handler(req);
 }
 
 
 void
+Unit::close_handler(nxt_unit_request_info_t *req)
+{
+    napi_value  conn_handle_close, conn;
+    req_data_t  *req_data;
+
+    req_data = (req_data_t *) req->data;
+
+    try {
+        nxt_handle_scope  scope(env());
+
+        conn = get_reference_value(req_data->conn_ref);
+
+        conn_handle_close = get_named_property(conn, "handleSocketClose");
+
+        nxt_async_context   async_context(env(), "close_handler");
+        nxt_callback_scope  async_scope(async_context);
+
+        make_callback(async_context, conn, conn_handle_close,
+                      nxt_napi::create(0));
+
+        remove_wrap(req_data->sock_ref);
+        remove_wrap(req_data->resp_ref);
+        remove_wrap(req_data->conn_ref);
+
+    } catch (exception &e) {
+        nxt_unit_req_warn(req, "close_handler: %s", e.str);
+
+        return;
+    }
+
+    nxt_unit_request_done(req, NXT_UNIT_OK);
+}
+
+
+static void
 nxt_uv_read_callback(uv_poll_t *handle, int status, int events)
 {
     nxt_unit_run_once((nxt_unit_ctx_t *) handle->data);
@@ -244,14 +328,14 @@ Unit::add_port(nxt_unit_ctx_t *ctx, nxt_unit_port_t *port)
         obj = reinterpret_cast<Unit *>(ctx->unit->data);
 
         if (fcntl(port->in_fd, F_SETFL, O_NONBLOCK) == -1) {
-            obj->throw_error("Failed to upgrade read"
-                             " file descriptor to O_NONBLOCK");
+            nxt_unit_warn(ctx, "fcntl(%d, O_NONBLOCK) failed: %s (%d)",
+                          port->in_fd, strerror(errno), errno);
             return -1;
         }
 
         status = napi_get_uv_event_loop(obj->env(), &loop);
         if (status != napi_ok) {
-            obj->throw_error("Failed to get uv.loop");
+            nxt_unit_warn(ctx, "Failed to get uv.loop");
             return NXT_UNIT_ERROR;
         }
 
@@ -259,13 +343,13 @@ Unit::add_port(nxt_unit_ctx_t *ctx, nxt_unit_port_t *port)
 
         err = uv_poll_init(loop, &node_ctx->poll, port->in_fd);
         if (err < 0) {
-            obj->throw_error("Failed to init uv.poll");
+            nxt_unit_warn(ctx, "Failed to init uv.poll");
             return NXT_UNIT_ERROR;
         }
 
         err = uv_poll_start(&node_ctx->poll, UV_READABLE, nxt_uv_read_callback);
         if (err < 0) {
-            obj->throw_error("Failed to start uv.poll");
+            nxt_unit_warn(ctx, "Failed to start uv.poll");
             return NXT_UNIT_ERROR;
         }
 
@@ -308,27 +392,35 @@ Unit::remove_port(nxt_unit_ctx_t *ctx, nxt_unit_port_id_t *port_id)
 
 
 void
-Unit::quit(nxt_unit_ctx_t *ctx)
+Unit::quit_cb(nxt_unit_ctx_t *ctx)
 {
-    Unit        *obj;
-    napi_value  server_obj, emit_close;
+    Unit  *obj;
 
     obj = reinterpret_cast<Unit *>(ctx->unit->data);
 
+    obj->quit(ctx);
+}
+
+
+void
+Unit::quit(nxt_unit_ctx_t *ctx)
+{
+    napi_value  server_obj, emit_close;
+
     try {
-        nxt_handle_scope  scope(obj->env());
+        nxt_handle_scope  scope(env());
 
-        server_obj = obj->get_server_object();
+        server_obj = get_server_object();
 
-        emit_close = obj->get_named_property(server_obj, "emit_close");
+        emit_close = get_named_property(server_obj, "emit_close");
 
-        nxt_async_context   async_context(obj->env(), "unit_quit");
+        nxt_async_context   async_context(env(), "unit_quit");
         nxt_callback_scope  async_scope(async_context);
 
-        obj->make_callback(async_context, server_obj, emit_close, 0, NULL);
+        make_callback(async_context, server_obj, emit_close);
 
     } catch (exception &e) {
-        obj->throw_error(e);
+        nxt_unit_debug(ctx, "quit: %s", e.str);
     }
 
     nxt_unit_done(ctx);
@@ -349,8 +441,9 @@ Unit::get_server_object()
 void
 Unit::create_headers(nxt_unit_request_info_t *req, napi_value request)
 {
+    void                *data;
     uint32_t            i;
-    napi_value          headers, raw_headers;
+    napi_value          headers, raw_headers, buffer;
     napi_status         status;
     nxt_unit_request_t  *r;
 
@@ -373,6 +466,13 @@ Unit::create_headers(nxt_unit_request_info_t *req, napi_value request)
     set_named_property(request, "httpVersion", r->version, r->version_length);
     set_named_property(request, "method", r->method, r->method_length);
     set_named_property(request, "url", r->target, r->target_length);
+
+    set_named_property(request, "_websocket_handshake", r->websocket_handshake);
+
+    buffer = create_buffer((size_t) req->content_length, &data);
+    nxt_unit_request_read(req, data, req->content_length);
+
+    set_named_property(request, "_data", buffer);
 }
 
 
@@ -410,15 +510,18 @@ napi_value
 Unit::create_socket(napi_value server_obj, nxt_unit_request_info_t *req)
 {
     napi_value          constructor, res;
+    req_data_t          *req_data;
     nxt_unit_request_t  *r;
 
     r = req->request;
 
-    constructor = get_named_property(server_obj, "socket");
+    constructor = get_named_property(server_obj, "Socket");
 
     res = new_instance(constructor);
 
-    set_named_property(res, "req_pointer", (intptr_t) req);
+    req_data = (req_data_t *) req->data;
+    req_data->sock_ref = wrap(res, req, sock_destroy);
+
     set_named_property(res, "remoteAddress", r->remote, r->remote_length);
     set_named_property(res, "localAddress", r->local, r->local_length);
 
@@ -429,34 +532,66 @@ Unit::create_socket(napi_value server_obj, nxt_unit_request_info_t *req)
 napi_value
 Unit::create_request(napi_value server_obj, napi_value socket)
 {
-    napi_value  constructor, return_val;
+    napi_value  constructor;
 
-    constructor = get_named_property(server_obj, "request");
+    constructor = get_named_property(server_obj, "ServerRequest");
 
-    return_val = new_instance(constructor, server_obj);
+    return new_instance(constructor, server_obj, socket);
+}
 
-    set_named_property(return_val, "socket", socket);
-    set_named_property(return_val, "connection", socket);
 
-    return return_val;
+napi_value
+Unit::create_response(napi_value server_obj, napi_value request,
+    nxt_unit_request_info_t *req)
+{
+    napi_value  constructor, res;
+    req_data_t  *req_data;
+
+    constructor = get_named_property(server_obj, "ServerResponse");
+
+    res = new_instance(constructor, request);
+
+    req_data = (req_data_t *) req->data;
+    req_data->resp_ref = wrap(res, req, resp_destroy);
+
+    return res;
 }
 
 
 napi_value
-Unit::create_response(napi_value server_obj, napi_value socket,
-    napi_value request, nxt_unit_request_info_t *req)
+Unit::create_websocket_frame(napi_value server_obj,
+                             nxt_unit_websocket_frame_t *ws)
 {
-    napi_value  constructor, return_val;
+    void        *data;
+    napi_value  constructor, res, buffer;
+    uint8_t     sc[2];
+
+    constructor = get_named_property(server_obj, "WebSocketFrame");
 
-    constructor = get_named_property(server_obj, "response");
+    res = new_instance(constructor);
 
-    return_val = new_instance(constructor, request);
+    set_named_property(res, "fin", (bool) ws->header->fin);
+    set_named_property(res, "opcode", ws->header->opcode);
+    set_named_property(res, "length", (int64_t) ws->payload_len);
 
-    set_named_property(return_val, "socket", socket);
-    set_named_property(return_val, "connection", socket);
-    set_named_property(return_val, "_req_point", (intptr_t) req);
+    if (ws->header->opcode == NXT_WEBSOCKET_OP_CLOSE) {
+        if (ws->payload_len >= 2) {
+            nxt_unit_websocket_read(ws, sc, 2);
 
-    return return_val;
+            set_named_property(res, "closeStatus",
+                               (((uint16_t) sc[0]) << 8) | sc[1]);
+
+        } else {
+            set_named_property(res, "closeStatus", -1);
+        }
+    }
+
+    buffer = create_buffer((size_t) ws->content_length, &data);
+    nxt_unit_websocket_read(ws, data, ws->content_length);
+
+    set_named_property(res, "binaryPayload", buffer);
+
+    return res;
 }
 
 
@@ -472,35 +607,32 @@ Unit::response_send_headers(napi_env env, napi_callback_info info)
     uint16_t                 hash;
     nxt_napi                 napi(env);
     napi_value               this_arg, headers, keys, name, value, array_val;
-    napi_value               req_num, array_entry;
+    napi_value               array_entry;
     napi_valuetype           val_type;
     nxt_unit_field_t         *f;
     nxt_unit_request_info_t  *req;
-    napi_value               argv[5];
+    napi_value               argv[4];
 
-    argc = 5;
+    argc = 4;
 
     try {
         this_arg = napi.get_cb_info(info, argc, argv);
-        if (argc != 5) {
+        if (argc != 4) {
             napi.throw_error("Wrong args count. Expected: "
                              "statusCode, headers, headers count, "
                              "headers length");
             return nullptr;
         }
 
-        req_num = napi.get_named_property(argv[0], "_req_point");
-
-        req = napi.get_request_info(req_num);
-
-        status_code = napi.get_value_uint32(argv[1]);
-        keys_count = napi.get_value_uint32(argv[3]);
-        header_len = napi.get_value_uint32(argv[4]);
+        req = napi.get_request_info(this_arg);
+        status_code = napi.get_value_uint32(argv[0]);
+        keys_count = napi.get_value_uint32(argv[2]);
+        header_len = napi.get_value_uint32(argv[3]);
 
         /* Need to reserve extra byte for C-string 0-termination. */
         header_len++;
 
-        headers = argv[2];
+        headers = argv[1];
 
         ret = nxt_unit_response_init(req, status_code, keys_count, header_len);
         if (ret != NXT_UNIT_OK) {
@@ -611,65 +743,151 @@ napi_value
 Unit::response_write(napi_env env, napi_callback_info info)
 {
     int                      ret;
-    char                     *ptr;
+    void                     *ptr;
     size_t                   argc, have_buf_len;
     uint32_t                 buf_len;
     nxt_napi                 napi(env);
-    napi_value               this_arg, req_num;
-    napi_status              status;
+    napi_value               this_arg;
     nxt_unit_buf_t           *buf;
     napi_valuetype           buf_type;
     nxt_unit_request_info_t  *req;
-    napi_value               argv[3];
+    napi_value               argv[2];
 
-    argc = 3;
+    argc = 2;
 
     try {
         this_arg = napi.get_cb_info(info, argc, argv);
-        if (argc != 3) {
+        if (argc != 2) {
             throw exception("Wrong args count. Expected: "
                             "chunk, chunk length");
         }
 
-        req_num = napi.get_named_property(argv[0], "_req_point");
-        req = napi.get_request_info(req_num);
+        req = napi.get_request_info(this_arg);
+        buf_type = napi.type_of(argv[0]);
+        buf_len = napi.get_value_uint32(argv[1]) + 1;
+
+        buf = nxt_unit_response_buf_alloc(req, buf_len);
+        if (buf == NULL) {
+            throw exception("Failed to allocate response buffer");
+        }
+
+        if (buf_type == napi_string) {
+            /* TODO: will work only for utf8 content-type */
+
+            have_buf_len = napi.get_value_string_utf8(argv[0], buf->free,
+                                                      buf_len);
 
-        buf_len = napi.get_value_uint32(argv[2]);
+        } else {
+            ptr = napi.get_buffer_info(argv[0], have_buf_len);
 
-        buf_type = napi.type_of(argv[1]);
+            memcpy(buf->free, ptr, have_buf_len);
+        }
 
+        buf->free += have_buf_len;
+
+        ret = nxt_unit_buf_send(buf);
+        if (ret != NXT_UNIT_OK) {
+            throw exception("Failed to send body buf");
+        }
     } catch (exception &e) {
         napi.throw_error(e);
         return nullptr;
     }
 
-    buf_len++;
+    return this_arg;
+}
 
-    buf = nxt_unit_response_buf_alloc(req, buf_len);
-    if (buf == NULL) {
-        goto failed;
-    }
 
-    if (buf_type == napi_string) {
-        /* TODO: will work only for utf8 content-type */
+napi_value
+Unit::response_end(napi_env env, napi_callback_info info)
+{
+    nxt_napi                 napi(env);
+    napi_value               this_arg;
+    req_data_t               *req_data;
+    nxt_unit_request_info_t  *req;
+
+    try {
+        this_arg = napi.get_cb_info(info);
+
+        req = napi.get_request_info(this_arg);
 
-        status = napi_get_value_string_utf8(env, argv[1], buf->free,
-                                            buf_len, &have_buf_len);
+        req_data = (req_data_t *) req->data;
 
-    } else {
-        status = napi_get_buffer_info(env, argv[1], (void **) &ptr,
-                                      &have_buf_len);
+        napi.remove_wrap(req_data->sock_ref);
+        napi.remove_wrap(req_data->resp_ref);
+        napi.remove_wrap(req_data->conn_ref);
 
-        memcpy(buf->free, ptr, have_buf_len);
+    } catch (exception &e) {
+        napi.throw_error(e);
+        return nullptr;
     }
 
-    if (status != napi_ok) {
-        goto failed;
+    nxt_unit_request_done(req, NXT_UNIT_OK);
+
+    return this_arg;
+}
+
+
+napi_value
+Unit::websocket_send_frame(napi_env env, napi_callback_info info)
+{
+    int                      ret, iovec_len;
+    bool                     fin;
+    size_t                   buf_len;
+    uint32_t                 opcode, sc;
+    nxt_napi                 napi(env);
+    napi_value               this_arg, frame, payload;
+    nxt_unit_request_info_t  *req;
+    char                     status_code[2];
+    struct iovec             iov[2];
+
+    iovec_len = 0;
+
+    try {
+        this_arg = napi.get_cb_info(info, frame);
+
+        req = napi.get_request_info(this_arg);
+
+        opcode = napi.get_value_uint32(napi.get_named_property(frame,
+                                                               "opcode"));
+        if (opcode == NXT_WEBSOCKET_OP_CLOSE) {
+            sc = napi.get_value_uint32(napi.get_named_property(frame,
+                                                               "closeStatus"));
+            status_code[0] = (sc >> 8) & 0xFF;
+            status_code[1] = sc & 0xFF;
+
+            iov[iovec_len].iov_base = status_code;
+            iov[iovec_len].iov_len = 2;
+            iovec_len++;
+        }
+
+        try {
+            fin = napi.get_value_bool(napi.get_named_property(frame, "fin"));
+
+        } catch (exception &e) {
+            fin = true;
+        }
+
+        payload = napi.get_named_property(frame, "binaryPayload");
+
+        if (napi.is_buffer(payload)) {
+            iov[iovec_len].iov_base = napi.get_buffer_info(payload, buf_len);
+
+        } else {
+            buf_len = 0;
+        }
+
+    } catch (exception &e) {
+        napi.throw_error(e);
+        return nullptr;
     }
 
-    buf->free += have_buf_len;
+    if (buf_len > 0) {
+        iov[iovec_len].iov_len = buf_len;
+        iovec_len++;
+    }
 
-    ret = nxt_unit_buf_send(buf);
+    ret = nxt_unit_websocket_sendv(req, opcode, fin ? 1 : 0, iov, iovec_len);
     if (ret != NXT_UNIT_OK) {
         goto failed;
     }
@@ -678,34 +896,65 @@ Unit::response_write(napi_env env, napi_callback_info info)
 
 failed:
 
-    napi.throw_error("Failed to write body");
+    napi.throw_error("Failed to send frame");
 
     return nullptr;
 }
 
 
 napi_value
-Unit::response_end(napi_env env, napi_callback_info info)
+Unit::websocket_set_sock(napi_env env, napi_callback_info info)
 {
-    size_t                   argc;
     nxt_napi                 napi(env);
-    napi_value               resp, this_arg, req_num;
+    napi_value               this_arg, sock;
+    req_data_t               *req_data;
     nxt_unit_request_info_t  *req;
 
-    argc = 1;
-
     try {
-        this_arg = napi.get_cb_info(info, argc, &resp);
+        this_arg = napi.get_cb_info(info, sock);
 
-        req_num = napi.get_named_property(resp, "_req_point");
-        req = napi.get_request_info(req_num);
+        req = napi.get_request_info(sock);
+
+        req_data = (req_data_t *) req->data;
+        req_data->conn_ref = napi.wrap(this_arg, req, conn_destroy);
 
     } catch (exception &e) {
         napi.throw_error(e);
         return nullptr;
     }
 
-    nxt_unit_request_done(req, NXT_UNIT_OK);
-
     return this_arg;
 }
+
+
+void
+Unit::conn_destroy(napi_env env, void *nativeObject, void *finalize_hint)
+{
+    nxt_unit_request_info_t  *req;
+
+    req = (nxt_unit_request_info_t *) nativeObject;
+
+    nxt_unit_warn(NULL, "conn_destroy: %p", req);
+}
+
+
+void
+Unit::sock_destroy(napi_env env, void *nativeObject, void *finalize_hint)
+{
+    nxt_unit_request_info_t  *req;
+
+    req = (nxt_unit_request_info_t *) nativeObject;
+
+    nxt_unit_warn(NULL, "sock_destroy: %p", req);
+}
+
+
+void
+Unit::resp_destroy(napi_env env, void *nativeObject, void *finalize_hint)
+{
+    nxt_unit_request_info_t  *req;
+
+    req = (nxt_unit_request_info_t *) nativeObject;
+
+    nxt_unit_warn(NULL, "resp_destroy: %p", req);
+}
diff --git a/src/nodejs/unit-http/unit.h b/src/nodejs/unit-http/unit.h
index e76d805a..f5eaf9fd 100644
--- a/src/nodejs/unit-http/unit.h
+++ b/src/nodejs/unit-http/unit.h
@@ -19,14 +19,28 @@ private:
 
     static napi_value create(napi_env env, napi_callback_info info);
     static void destroy(napi_env env, void *nativeObject, void *finalize_hint);
+    static void conn_destroy(napi_env env, void *nativeObject, void *finalize_hint);
+    static void sock_destroy(napi_env env, void *nativeObject, void *finalize_hint);
+    static void resp_destroy(napi_env env, void *nativeObject, void *finalize_hint);
 
     static napi_value create_server(napi_env env, napi_callback_info info);
     static napi_value listen(napi_env env, napi_callback_info info);
     static napi_value _read(napi_env env, napi_callback_info info);
-    static void request_handler(nxt_unit_request_info_t *req);
+
+    static void request_handler_cb(nxt_unit_request_info_t *req);
+    void request_handler(nxt_unit_request_info_t *req);
+
+    static void websocket_handler_cb(nxt_unit_websocket_frame_t *ws);
+    void websocket_handler(nxt_unit_websocket_frame_t *ws);
+
+    static void close_handler_cb(nxt_unit_request_info_t *req);
+    void close_handler(nxt_unit_request_info_t *req);
+
     static int add_port(nxt_unit_ctx_t *ctx, nxt_unit_port_t *port);
     static void remove_port(nxt_unit_ctx_t *ctx, nxt_unit_port_id_t *port_id);
-    static void quit(nxt_unit_ctx_t *ctx);
+
+    static void quit_cb(nxt_unit_ctx_t *ctx);
+    void quit(nxt_unit_ctx_t *ctx);
 
     napi_value get_server_object();
 
@@ -35,20 +49,25 @@ private:
 
     napi_value create_request(napi_value server_obj, napi_value socket);
 
-    napi_value create_response(napi_value server_obj, napi_value socket,
-                               napi_value request,
+    napi_value create_response(napi_value server_obj, napi_value request,
                                nxt_unit_request_info_t *req);
 
+    napi_value create_websocket_frame(napi_value server_obj,
+                                      nxt_unit_websocket_frame_t *ws);
+
     static napi_value response_send_headers(napi_env env,
                                             napi_callback_info info);
 
     static napi_value response_write(napi_env env, napi_callback_info info);
     static napi_value response_end(napi_env env, napi_callback_info info);
+    static napi_value websocket_send_frame(napi_env env,
+                                           napi_callback_info info);
+    static napi_value websocket_set_sock(napi_env env, napi_callback_info info);
 
     void create_headers(nxt_unit_request_info_t *req, napi_value request);
 
     void append_header(nxt_unit_field_t *f, napi_value headers,
-                                     napi_value raw_headers, uint32_t idx);
+                       napi_value raw_headers, uint32_t idx);
 
     static napi_ref constructor_;
 
diff --git a/src/nodejs/unit-http/utils.js b/src/nodejs/unit-http/utils.js
new file mode 100644
index 00000000..e1e51b0e
--- /dev/null
+++ b/src/nodejs/unit-http/utils.js
@@ -0,0 +1,73 @@
+var noop = exports.noop = function(){};
+
+exports.extend = function extend(dest, source) {
+    for (var prop in source) {
+        dest[prop] = source[prop];
+    }
+};
+
+exports.eventEmitterListenerCount =
+    require('events').EventEmitter.listenerCount ||
+    function(emitter, type) { return emitter.listeners(type).length; };
+
+exports.bufferAllocUnsafe = Buffer.allocUnsafe ?
+    Buffer.allocUnsafe :
+    function oldBufferAllocUnsafe(size) { return new Buffer(size); };
+
+exports.bufferFromString = Buffer.from ?
+    Buffer.from :
+    function oldBufferFromString(string, encoding) {
+      return new Buffer(string, encoding);
+    };
+
+exports.BufferingLogger = function createBufferingLogger(identifier, uniqueID) {
+    try {
+        var logFunction = require('debug')(identifier);
+    }
+    catch(e) {
+        logFunction = noop;
+        logFunction.enabled = false;
+    }
+
+    if (logFunction.enabled) {
+        var logger = new BufferingLogger(identifier, uniqueID, logFunction);
+        var debug = logger.log.bind(logger);
+        debug.printOutput = logger.printOutput.bind(logger);
+        debug.enabled = logFunction.enabled;
+        return debug;
+    }
+    logFunction.printOutput = noop;
+    return logFunction;
+};
+
+function BufferingLogger(identifier, uniqueID, logFunction) {
+    this.logFunction = logFunction;
+    this.identifier = identifier;
+    this.uniqueID = uniqueID;
+    this.buffer = [];
+}
+
+BufferingLogger.prototype.log = function() {
+  this.buffer.push([ new Date(), Array.prototype.slice.call(arguments) ]);
+  return this;
+};
+
+BufferingLogger.prototype.clear = function() {
+  this.buffer = [];
+  return this;
+};
+
+BufferingLogger.prototype.printOutput = function(logFunction) {
+    if (!logFunction) { logFunction = this.logFunction; }
+    var uniqueID = this.uniqueID;
+    this.buffer.forEach(function(entry) {
+        var date = entry[0].toLocaleString();
+        var args = entry[1].slice();
+        var formatString = args[0];
+        if (formatString !== (void 0) && formatString !== null) {
+            formatString = '%s - %s - ' + formatString.toString();
+            args.splice(0, 1, formatString, date, uniqueID);
+            logFunction.apply(global, args);
+        }
+    });
+};
diff --git a/src/nodejs/unit-http/websocket.js b/src/nodejs/unit-http/websocket.js
new file mode 100644
index 00000000..36d0e07a
--- /dev/null
+++ b/src/nodejs/unit-http/websocket.js
@@ -0,0 +1,14 @@
+
+/*
+ * Copyright (C) NGINX, Inc.
+ */
+
+'use strict';
+
+module.exports = {
+    'server'       : require('./websocket_server'),
+    'router'       : require('./websocket_router'),
+    'frame'        : require('./websocket_frame'),
+    'request'      : require('./websocket_request'),
+    'connection'   : require('./websocket_connection'),
+};
diff --git a/src/nodejs/unit-http/websocket_connection.js b/src/nodejs/unit-http/websocket_connection.js
new file mode 100644
index 00000000..4eccf6bf
--- /dev/null
+++ b/src/nodejs/unit-http/websocket_connection.js
@@ -0,0 +1,683 @@
+/************************************************************************
+ *  Copyright 2010-2015 Brian McKelvey.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ ***********************************************************************/
+
+var util = require('util');
+var utils = require('./utils');
+var unit_lib = require('./build/Release/unit-http');
+var EventEmitter = require('events').EventEmitter;
+var WebSocketFrame = require('./websocket_frame');
+var bufferAllocUnsafe = utils.bufferAllocUnsafe;
+var bufferFromString = utils.bufferFromString;
+
+// Connected, fully-open, ready to send and receive frames
+const STATE_OPEN = 'open';
+// Received a close frame from the remote peer
+const STATE_PEER_REQUESTED_CLOSE = 'peer_requested_close';
+// Sent close frame to remote peer.  No further data can be sent.
+const STATE_ENDING = 'ending';
+// Connection is fully closed.  No further data can be sent or received.
+const STATE_CLOSED = 'closed';
+
+var idCounter = 0;
+
+function WebSocketConnection(socket, extensions, protocol, maskOutgoingPackets, config) {
+    this._debug = utils.BufferingLogger('websocket:connection', ++idCounter);
+    this._debug('constructor');
+    
+    if (this._debug.enabled) {
+        instrumentSocketForDebugging(this, socket);
+    }
+    
+    // Superclass Constructor
+    EventEmitter.call(this);
+
+    this._pingListenerCount = 0;
+    this.on('newListener', function(ev) {
+        if (ev === 'ping'){
+            this._pingListenerCount++;
+        }
+      }).on('removeListener', function(ev) {
+        if (ev === 'ping') {
+            this._pingListenerCount--;
+        }
+    });
+
+    this.config = config;
+    this.socket = socket;
+    this.protocol = protocol;
+    this.extensions = extensions;
+    this.remoteAddress = socket.remoteAddress;
+    this.closeReasonCode = -1;
+    this.closeDescription = null;
+    this.closeEventEmitted = false;
+
+    // We have to mask outgoing packets if we're acting as a WebSocket client.
+    this.maskOutgoingPackets = maskOutgoingPackets;
+
+    this.fragmentationSize = 0; // data received so far...
+    this.frameQueue = [];
+
+    // Various bits of connection state
+    this.connected = true;
+    this.state = STATE_OPEN;
+    this.waitingForCloseResponse = false;
+    // Received TCP FIN, socket's readable stream is finished.
+    this.receivedEnd = false;
+
+    this.closeTimeout = this.config.closeTimeout;
+    this.assembleFragments = this.config.assembleFragments;
+    this.maxReceivedMessageSize = this.config.maxReceivedMessageSize;
+
+    this.outputBufferFull = false;
+    this.inputPaused = false;
+    this._closeTimerHandler = this.handleCloseTimer.bind(this);
+
+    // Disable nagle algorithm?
+    this.socket.setNoDelay(this.config.disableNagleAlgorithm);
+
+    // Make sure there is no socket inactivity timeout
+    this.socket.setTimeout(0);
+
+    // The HTTP Client seems to subscribe to socket error events
+    // and re-dispatch them in such a way that doesn't make sense
+    // for users of our client, so we want to make sure nobody
+    // else is listening for error events on the socket besides us.
+    this.socket.removeAllListeners('error');
+
+    this._set_sock(this.socket);
+}
+
+WebSocketConnection.prototype._set_sock = unit_lib.websocket_set_sock;
+WebSocketConnection.prototype._end = unit_lib.response_end;
+
+WebSocketConnection.CLOSE_REASON_NORMAL = 1000;
+WebSocketConnection.CLOSE_REASON_GOING_AWAY = 1001;
+WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR = 1002;
+WebSocketConnection.CLOSE_REASON_UNPROCESSABLE_INPUT = 1003;
+WebSocketConnection.CLOSE_REASON_RESERVED = 1004; // Reserved value.  Undefined meaning.
+WebSocketConnection.CLOSE_REASON_NOT_PROVIDED = 1005; // Not to be used on the wire
+WebSocketConnection.CLOSE_REASON_ABNORMAL = 1006; // Not to be used on the wire
+WebSocketConnection.CLOSE_REASON_INVALID_DATA = 1007;
+WebSocketConnection.CLOSE_REASON_POLICY_VIOLATION = 1008;
+WebSocketConnection.CLOSE_REASON_MESSAGE_TOO_BIG = 1009;
+WebSocketConnection.CLOSE_REASON_EXTENSION_REQUIRED = 1010;
+WebSocketConnection.CLOSE_REASON_INTERNAL_SERVER_ERROR = 1011;
+WebSocketConnection.CLOSE_REASON_TLS_HANDSHAKE_FAILED = 1015; // Not to be used on the wire
+
+WebSocketConnection.CLOSE_DESCRIPTIONS = {
+    1000: 'Normal connection closure',
+    1001: 'Remote peer is going away',
+    1002: 'Protocol error',
+    1003: 'Unprocessable input',
+    1004: 'Reserved',
+    1005: 'Reason not provided',
+    1006: 'Abnormal closure, no further detail available',
+    1007: 'Invalid data received',
+    1008: 'Policy violation',
+    1009: 'Message too big',
+    1010: 'Extension requested by client is required',
+    1011: 'Internal Server Error',
+    1015: 'TLS Handshake Failed'
+};
+
+function validateCloseReason(code) {
+    if (code < 1000) {
+        // Status codes in the range 0-999 are not used
+        return false;
+    }
+    if (code >= 1000 && code <= 2999) {
+        // Codes from 1000 - 2999 are reserved for use by the protocol.  Only
+        // a few codes are defined, all others are currently illegal.
+        return [1000, 1001, 1002, 1003, 1007, 1008, 1009, 1010, 1011, 1012, 1013, 1014].indexOf(code) !== -1;
+    }
+    if (code >= 3000 && code <= 3999) {
+        // Reserved for use by libraries, frameworks, and applications.
+        // Should be registered with IANA.  Interpretation of these codes is
+        // undefined by the WebSocket protocol.
+        return true;
+    }
+    if (code >= 4000 && code <= 4999) {
+        // Reserved for private use.  Interpretation of these codes is
+        // undefined by the WebSocket protocol.
+        return true;
+    }
+    if (code >= 5000) {
+        return false;
+    }
+}
+
+util.inherits(WebSocketConnection, EventEmitter);
+
+WebSocketConnection.prototype._addSocketEventListeners = function() {
+    this.socket.on('error', this.handleSocketError.bind(this));
+    this.socket.on('end', this.handleSocketEnd.bind(this));
+    this.socket.on('close', this.handleSocketClose.bind(this));
+};
+
+WebSocketConnection.prototype.handleSocketError = function(error) {
+    this._debug('handleSocketError: %j', error);
+    if (this.state === STATE_CLOSED) {
+        // See https://github.com/theturtle32/WebSocket-Node/issues/288
+        this._debug('  --- Socket \'error\' after \'close\'');
+        return;
+    }
+    this.closeReasonCode = WebSocketConnection.CLOSE_REASON_ABNORMAL;
+    this.closeDescription = 'Socket Error: ' + error.syscall + ' ' + error.code;
+    this.connected = false;
+    this.state = STATE_CLOSED;
+    this.fragmentationSize = 0;
+    if (utils.eventEmitterListenerCount(this, 'error') > 0) {
+        this.emit('error', error);
+    }
+    this.socket.destroy(error);
+    this._debug.printOutput();
+
+    this._end();
+};
+
+WebSocketConnection.prototype.handleSocketEnd = function() {
+    this._debug('handleSocketEnd: received socket end.  state = %s', this.state);
+    this.receivedEnd = true;
+    if (this.state === STATE_CLOSED) {
+        // When using the TLS module, sometimes the socket will emit 'end'
+        // after it emits 'close'.  I don't think that's correct behavior,
+        // but we should deal with it gracefully by ignoring it.
+        this._debug('  --- Socket \'end\' after \'close\'');
+        return;
+    }
+    if (this.state !== STATE_PEER_REQUESTED_CLOSE &&
+        this.state !== STATE_ENDING) {
+      this._debug('  --- UNEXPECTED socket end.');
+      this.socket.end();
+
+      this._end();
+    }
+};
+
+WebSocketConnection.prototype.handleSocketClose = function(hadError) {
+    this._debug('handleSocketClose: received socket close');
+    this.socketHadError = hadError;
+    this.connected = false;
+    this.state = STATE_CLOSED;
+    // If closeReasonCode is still set to -1 at this point then we must
+    // not have received a close frame!!
+    if (this.closeReasonCode === -1) {
+        this.closeReasonCode = WebSocketConnection.CLOSE_REASON_ABNORMAL;
+        this.closeDescription = 'Connection dropped by remote peer.';
+    }
+    this.clearCloseTimer();
+    if (!this.closeEventEmitted) {
+        this.closeEventEmitted = true;
+        this._debug('-- Emitting WebSocketConnection close event');
+        this.emit('close', this.closeReasonCode, this.closeDescription);
+    }
+};
+
+WebSocketConnection.prototype.close = function(reasonCode, description) {
+    if (this.connected) {
+        this._debug('close: Initating clean WebSocket close sequence.');
+        if ('number' !== typeof reasonCode) {
+            reasonCode = WebSocketConnection.CLOSE_REASON_NORMAL;
+        }
+        if (!validateCloseReason(reasonCode)) {
+            throw new Error('Close code ' + reasonCode + ' is not valid.');
+        }
+        if ('string' !== typeof description) {
+            description = WebSocketConnection.CLOSE_DESCRIPTIONS[reasonCode];
+        }
+        this.closeReasonCode = reasonCode;
+        this.closeDescription = description;
+        this.setCloseTimer();
+        this.sendCloseFrame(this.closeReasonCode, this.closeDescription);
+        this.state = STATE_ENDING;
+        this.connected = false;
+    }
+};
+
+WebSocketConnection.prototype.drop = function(reasonCode, description, skipCloseFrame) {
+    this._debug('drop');
+    if (typeof(reasonCode) !== 'number') {
+        reasonCode = WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR;
+    }
+
+    if (typeof(description) !== 'string') {
+        // If no description is provided, try to look one up based on the
+        // specified reasonCode.
+        description = WebSocketConnection.CLOSE_DESCRIPTIONS[reasonCode];
+    }
+
+    this._debug('Forcefully dropping connection. skipCloseFrame: %s, code: %d, description: %s',
+        skipCloseFrame, reasonCode, description
+    );
+
+    this.closeReasonCode = reasonCode;
+    this.closeDescription = description;
+    this.frameQueue = [];
+    this.fragmentationSize = 0;
+    if (!skipCloseFrame) {
+        this.sendCloseFrame(reasonCode, description);
+    }
+    this.connected = false;
+    this.state = STATE_CLOSED;
+    this.clearCloseTimer();
+
+    if (!this.closeEventEmitted) {
+        this.closeEventEmitted = true;
+        this._debug('Emitting WebSocketConnection close event');
+        this.emit('close', this.closeReasonCode, this.closeDescription);
+    }
+
+    this._debug('Drop: destroying socket');
+    this.socket.destroy();
+
+    this._end();
+};
+
+WebSocketConnection.prototype.setCloseTimer = function() {
+    this._debug('setCloseTimer');
+    this.clearCloseTimer();
+    this._debug('Setting close timer');
+    this.waitingForCloseResponse = true;
+    this.closeTimer = setTimeout(this._closeTimerHandler, this.closeTimeout);
+};
+
+WebSocketConnection.prototype.clearCloseTimer = function() {
+    this._debug('clearCloseTimer');
+    if (this.closeTimer) {
+        this._debug('Clearing close timer');
+        clearTimeout(this.closeTimer);
+        this.waitingForCloseResponse = false;
+        this.closeTimer = null;
+    }
+};
+
+WebSocketConnection.prototype.handleCloseTimer = function() {
+    this._debug('handleCloseTimer');
+    this.closeTimer = null;
+    if (this.waitingForCloseResponse) {
+        this._debug('Close response not received from client.  Forcing socket end.');
+        this.waitingForCloseResponse = false;
+        this.state = STATE_CLOSED;
+        this.socket.end();
+
+        this._end();
+    }
+};
+
+WebSocketConnection.prototype.processFrame = function(frame) {
+    if (!this.connected) {
+        return;
+    }
+
+    this._debug('processFrame');
+    this._debug(' -- frame: %s', frame);
+
+    // Any non-control opcode besides 0x00 (continuation) received in the
+    // middle of a fragmented message is illegal.
+    if (this.frameQueue.length !== 0 && (frame.opcode > 0x00 && frame.opcode < 0x08)) {
+        this.drop(WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR,
+          'Illegal frame opcode 0x' + frame.opcode.toString(16) + ' ' +
+          'received in middle of fragmented message.');
+        return;
+    }
+
+    switch(frame.opcode) {
+        case 0x02: // WebSocketFrame.BINARY_FRAME
+            this._debug('-- Binary Frame');
+            if (this.assembleFragments) {
+                if (frame.fin) {
+                    // Complete single-frame message received
+                    this._debug('---- Emitting \'message\' event');
+                    this.emit('message', {
+                        type: 'binary',
+                        binaryData: frame.binaryPayload
+                    });
+                }
+                else {
+                    // beginning of a fragmented message
+                    this.frameQueue.push(frame);
+                    this.fragmentationSize = frame.length;
+                }
+            }
+            break;
+        case 0x01: // WebSocketFrame.TEXT_FRAME
+            this._debug('-- Text Frame');
+            if (this.assembleFragments) {
+                if (frame.fin) {
+                    // Complete single-frame message received
+                    this._debug('---- Emitting \'message\' event');
+                    this.emit('message', {
+                        type: 'utf8',
+                        utf8Data: frame.binaryPayload.toString('utf8')
+                    });
+                }
+                else {
+                    // beginning of a fragmented message
+                    this.frameQueue.push(frame);
+                    this.fragmentationSize = frame.length;
+                }
+            }
+            break;
+        case 0x00: // WebSocketFrame.CONTINUATION
+            this._debug('-- Continuation Frame');
+            if (this.assembleFragments) {
+                if (this.frameQueue.length === 0) {
+                    this.drop(WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR,
+                      'Unexpected Continuation Frame');
+                    return;
+                }
+
+                this.fragmentationSize += frame.length;
+
+                if (this.fragmentationSize > this.maxReceivedMessageSize) {
+                    this.drop(WebSocketConnection.CLOSE_REASON_MESSAGE_TOO_BIG,
+                      'Maximum message size exceeded.');
+                    return;
+                }
+
+                this.frameQueue.push(frame);
+
+                if (frame.fin) {
+                    // end of fragmented message, so we process the whole
+                    // message now.  We also have to decode the utf-8 data
+                    // for text frames after combining all the fragments.
+                    var bytesCopied = 0;
+                    var binaryPayload = bufferAllocUnsafe(this.fragmentationSize);
+                    var opcode = this.frameQueue[0].opcode;
+                    this.frameQueue.forEach(function (currentFrame) {
+                        currentFrame.binaryPayload.copy(binaryPayload, bytesCopied);
+                        bytesCopied += currentFrame.binaryPayload.length;
+                    });
+                    this.frameQueue = [];
+                    this.fragmentationSize = 0;
+
+                    switch (opcode) {
+                        case 0x02: // WebSocketOpcode.BINARY_FRAME
+                            this.emit('message', {
+                                type: 'binary',
+                                binaryData: binaryPayload
+                            });
+                            break;
+                        case 0x01: // WebSocketOpcode.TEXT_FRAME
+                            this.emit('message', {
+                                type: 'utf8',
+                                utf8Data: binaryPayload.toString('utf8')
+                            });
+                            break;
+                        default:
+                            this.drop(WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR,
+                              'Unexpected first opcode in fragmentation sequence: 0x' + opcode.toString(16));
+                            return;
+                    }
+                }
+            }
+            break;
+        case 0x09: // WebSocketFrame.PING
+            this._debug('-- Ping Frame');
+
+            if (this._pingListenerCount > 0) {
+                // logic to emit the ping frame: this is only done when a listener is known to exist
+                // Expose a function allowing the user to override the default ping() behavior
+                var cancelled = false;
+                var cancel = function() { 
+                  cancelled = true; 
+                };
+                this.emit('ping', cancel, frame.binaryPayload);
+
+                // Only send a pong if the client did not indicate that he would like to cancel
+                if (!cancelled) {
+                    this.pong(frame.binaryPayload);
+                }
+            }
+            else {
+                this.pong(frame.binaryPayload);
+            }
+
+            break;
+        case 0x0A: // WebSocketFrame.PONG
+            this._debug('-- Pong Frame');
+            this.emit('pong', frame.binaryPayload);
+            break;
+        case 0x08: // WebSocketFrame.CONNECTION_CLOSE
+            this._debug('-- Close Frame');
+            if (this.waitingForCloseResponse) {
+                // Got response to our request to close the connection.
+                // Close is complete, so we just hang up.
+                this._debug('---- Got close response from peer.  Completing closing handshake.');
+                this.clearCloseTimer();
+                this.waitingForCloseResponse = false;
+                this.state = STATE_CLOSED;
+                this.socket.end();
+
+                this._end();
+                return;
+            }
+
+            this._debug('---- Closing handshake initiated by peer.');
+            // Got request from other party to close connection.
+            // Send back acknowledgement and then hang up.
+            this.state = STATE_PEER_REQUESTED_CLOSE;
+            var respondCloseReasonCode;
+
+            // Make sure the close reason provided is legal according to
+            // the protocol spec.  Providing no close status is legal.
+            // WebSocketFrame sets closeStatus to -1 by default, so if it
+            // is still -1, then no status was provided.
+            if (frame.invalidCloseFrameLength) {
+                this.closeReasonCode = 1005; // 1005 = No reason provided.
+                respondCloseReasonCode = WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR;
+            }
+            else if (frame.closeStatus === -1 || validateCloseReason(frame.closeStatus)) {
+                this.closeReasonCode = frame.closeStatus;
+                respondCloseReasonCode = WebSocketConnection.CLOSE_REASON_NORMAL;
+            }
+            else {
+                this.closeReasonCode = frame.closeStatus;
+                respondCloseReasonCode = WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR;
+            }
+
+            // If there is a textual description in the close frame, extract it.
+            if (frame.binaryPayload.length > 1) {
+                this.closeDescription = frame.binaryPayload.toString('utf8');
+            }
+            else {
+                this.closeDescription = WebSocketConnection.CLOSE_DESCRIPTIONS[this.closeReasonCode];
+            }
+            this._debug(
+                '------ Remote peer %s - code: %d - %s - close frame payload length: %d',
+                this.remoteAddress, this.closeReasonCode,
+                this.closeDescription, frame.length
+            );
+            this._debug('------ responding to remote peer\'s close request.');
+            this.drop(respondCloseReasonCode, null);
+            this.connected = false;
+            break;
+        default:
+            this._debug('-- Unrecognized Opcode %d', frame.opcode);
+            this.drop(WebSocketConnection.CLOSE_REASON_PROTOCOL_ERROR,
+              'Unrecognized Opcode: 0x' + frame.opcode.toString(16));
+            break;
+    }
+};
+
+WebSocketConnection.prototype.send = function(data, cb) {
+    this._debug('send');
+    if (Buffer.isBuffer(data)) {
+        this.sendBytes(data, cb);
+    }
+    else if (typeof(data['toString']) === 'function') {
+        this.sendUTF(data, cb);
+    }
+    else {
+        throw new Error('Data provided must either be a Node Buffer or implement toString()');
+    }
+};
+
+WebSocketConnection.prototype.sendUTF = function(data, cb) {
+    data = bufferFromString(data.toString(), 'utf8');
+    this._debug('sendUTF: %d bytes', data.length);
+
+    var frame = new WebSocketFrame();
+    frame.opcode = 0x01; // WebSocketOpcode.TEXT_FRAME
+    frame.binaryPayload = data;
+
+    this.fragmentAndSend(frame, cb);
+};
+
+WebSocketConnection.prototype.sendBytes = function(data, cb) {
+    this._debug('sendBytes');
+    if (!Buffer.isBuffer(data)) {
+        throw new Error('You must pass a Node Buffer object to WebSocketConnection.prototype.sendBytes()');
+    }
+
+    var frame = new WebSocketFrame();
+    frame.opcode = 0x02; // WebSocketOpcode.BINARY_FRAME
+    frame.binaryPayload = data;
+
+    this.fragmentAndSend(frame, cb);
+};
+
+WebSocketConnection.prototype.ping = function(data) {
+    this._debug('ping');
+
+    var frame = new WebSocketFrame();
+    frame.opcode = 0x09; // WebSocketOpcode.PING
+    frame.fin = true;
+
+    if (data) {
+        if (!Buffer.isBuffer(data)) {
+            data = bufferFromString(data.toString(), 'utf8');
+        }
+        if (data.length > 125) {
+            this._debug('WebSocket: Data for ping is longer than 125 bytes.  Truncating.');
+            data = data.slice(0,124);
+        }
+        frame.binaryPayload = data;
+    }
+
+    this.sendFrame(frame);
+};
+
+// Pong frames have to echo back the contents of the data portion of the
+// ping frame exactly, byte for byte.
+WebSocketConnection.prototype.pong = function(binaryPayload) {
+    this._debug('pong');
+
+    var frame = new WebSocketFrame();
+    frame.opcode = 0x0A; // WebSocketOpcode.PONG
+    if (Buffer.isBuffer(binaryPayload) && binaryPayload.length > 125) {
+        this._debug('WebSocket: Data for pong is longer than 125 bytes.  Truncating.');
+        binaryPayload = binaryPayload.slice(0,124);
+    }
+    frame.binaryPayload = binaryPayload;
+    frame.fin = true;
+
+    this.sendFrame(frame);
+};
+
+WebSocketConnection.prototype.fragmentAndSend = function(frame, cb) {
+    this._debug('fragmentAndSend');
+    if (frame.opcode > 0x07) {
+        throw new Error('You cannot fragment control frames.');
+    }
+
+    var threshold = this.config.fragmentationThreshold;
+    var length = frame.binaryPayload.length;
+
+    // Send immediately if fragmentation is disabled or the message is not
+    // larger than the fragmentation threshold.
+    if (!this.config.fragmentOutgoingMessages || (frame.binaryPayload && length <= threshold)) {
+        frame.fin = true;
+        this.sendFrame(frame, cb);
+        return;
+    }
+
+    var numFragments = Math.ceil(length / threshold);
+    var sentFragments = 0;
+    var sentCallback = function fragmentSentCallback(err) {
+        if (err) {
+            if (typeof cb === 'function') {
+                // pass only the first error
+                cb(err);
+                cb = null;
+            }
+            return;
+        }
+        ++sentFragments;
+        if ((sentFragments === numFragments) && (typeof cb === 'function')) {
+            cb();
+        }
+    };
+    for (var i=1; i <= numFragments; i++) {
+        var currentFrame = new WebSocketFrame();
+
+        // continuation opcode except for first frame.
+        currentFrame.opcode = (i === 1) ? frame.opcode : 0x00;
+
+        // fin set on last frame only
+        currentFrame.fin = (i === numFragments);
+
+        // length is likely to be shorter on the last fragment
+        var currentLength = (i === numFragments) ? length - (threshold * (i-1)) : threshold;
+        var sliceStart = threshold * (i-1);
+
+        // Slice the right portion of the original payload
+        currentFrame.binaryPayload = frame.binaryPayload.slice(sliceStart, sliceStart + currentLength);
+
+        this.sendFrame(currentFrame, sentCallback);
+    }
+};
+
+WebSocketConnection.prototype.sendCloseFrame = function(reasonCode, description, cb) {
+    if (typeof(reasonCode) !== 'number') {
+        reasonCode = WebSocketConnection.CLOSE_REASON_NORMAL;
+    }
+
+    this._debug('sendCloseFrame state: %s, reasonCode: %d, description: %s', this.state, reasonCode, description);
+
+    if (this.state !== STATE_OPEN && this.state !== STATE_PEER_REQUESTED_CLOSE) { return; }
+
+    var frame = new WebSocketFrame();
+    frame.fin = true;
+    frame.opcode = 0x08; // WebSocketOpcode.CONNECTION_CLOSE
+    frame.closeStatus = reasonCode;
+    if (typeof(description) === 'string') {
+        frame.binaryPayload = bufferFromString(description, 'utf8');
+    }
+
+    this.sendFrame(frame, cb);
+    this.socket.end();
+};
+
+WebSocketConnection.prototype._send_frame = unit_lib.websocket_send_frame;
+
+WebSocketConnection.prototype.sendFrame = function(frame, cb) {
+    this._debug('sendFrame');
+
+    frame.mask = this.maskOutgoingPackets;
+
+    this._send_frame(frame);
+
+    if (typeof cb === 'function') {
+        cb();
+    }
+
+    var flushed = 0; // this.socket.write(frame.toBuffer(), cb);
+    this.outputBufferFull = !flushed;
+    return flushed;
+};
+
+module.exports = WebSocketConnection;
diff --git a/src/nodejs/unit-http/websocket_frame.js b/src/nodejs/unit-http/websocket_frame.js
new file mode 100644
index 00000000..9989937d
--- /dev/null
+++ b/src/nodejs/unit-http/websocket_frame.js
@@ -0,0 +1,11 @@
+
+/*
+ * Copyright (C) NGINX, Inc.
+ */
+
+'use strict';
+
+function WebSocketFrame() {
+}
+
+module.exports = WebSocketFrame;
diff --git a/src/nodejs/unit-http/websocket_request.js b/src/nodejs/unit-http/websocket_request.js
new file mode 100644
index 00000000..d84e428b
--- /dev/null
+++ b/src/nodejs/unit-http/websocket_request.js
@@ -0,0 +1,509 @@
+/************************************************************************
+ *  Copyright 2010-2015 Brian McKelvey.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ ***********************************************************************/
+
+var util = require('util');
+var url = require('url');
+var EventEmitter = require('events').EventEmitter;
+var WebSocketConnection = require('./websocket_connection');
+
+var headerValueSplitRegExp = /,\s*/;
+var headerParamSplitRegExp = /;\s*/;
+var headerSanitizeRegExp = /[\r\n]/g;
+var xForwardedForSeparatorRegExp = /,\s*/;
+var separators = [
+    '(', ')', '<', '>', '@',
+    ',', ';', ':', '\\', '\"',
+    '/', '[', ']', '?', '=',
+    '{', '}', ' ', String.fromCharCode(9)
+];
+var controlChars = [String.fromCharCode(127) /* DEL */];
+for (var i=0; i < 31; i ++) {
+    /* US-ASCII Control Characters */
+    controlChars.push(String.fromCharCode(i));
+}
+
+var cookieNameValidateRegEx = /([\x00-\x20\x22\x28\x29\x2c\x2f\x3a-\x3f\x40\x5b-\x5e\x7b\x7d\x7f])/;
+var cookieValueValidateRegEx = /[^\x21\x23-\x2b\x2d-\x3a\x3c-\x5b\x5d-\x7e]/;
+var cookieValueDQuoteValidateRegEx = /^"[^"]*"$/;
+var controlCharsAndSemicolonRegEx = /[\x00-\x20\x3b]/g;
+
+var cookieSeparatorRegEx = /[;,] */;
+
+var httpStatusDescriptions = {
+    100: 'Continue',
+    101: 'Switching Protocols',
+    200: 'OK',
+    201: 'Created',
+    203: 'Non-Authoritative Information',
+    204: 'No Content',
+    205: 'Reset Content',
+    206: 'Partial Content',
+    300: 'Multiple Choices',
+    301: 'Moved Permanently',
+    302: 'Found',
+    303: 'See Other',
+    304: 'Not Modified',
+    305: 'Use Proxy',
+    307: 'Temporary Redirect',
+    400: 'Bad Request',
+    401: 'Unauthorized',
+    402: 'Payment Required',
+    403: 'Forbidden',
+    404: 'Not Found',
+    406: 'Not Acceptable',
+    407: 'Proxy Authorization Required',
+    408: 'Request Timeout',
+    409: 'Conflict',
+    410: 'Gone',
+    411: 'Length Required',
+    412: 'Precondition Failed',
+    413: 'Request Entity Too Long',
+    414: 'Request-URI Too Long',
+    415: 'Unsupported Media Type',
+    416: 'Requested Range Not Satisfiable',
+    417: 'Expectation Failed',
+    426: 'Upgrade Required',
+    500: 'Internal Server Error',
+    501: 'Not Implemented',
+    502: 'Bad Gateway',
+    503: 'Service Unavailable',
+    504: 'Gateway Timeout',
+    505: 'HTTP Version Not Supported'
+};
+
+function WebSocketRequest(socket, httpRequest, serverConfig) {
+    // Superclass Constructor
+    EventEmitter.call(this);
+
+    this.socket = socket;
+    this.httpRequest = httpRequest;
+    this.resource = httpRequest.url;
+    this.remoteAddress = socket.remoteAddress;
+    this.remoteAddresses = [this.remoteAddress];
+    this.serverConfig = serverConfig;
+
+    // Watch for the underlying TCP socket closing before we call accept
+    this._socketIsClosing = false;
+    this._socketCloseHandler = this._handleSocketCloseBeforeAccept.bind(this);
+    this.socket.on('end', this._socketCloseHandler);
+    this.socket.on('close', this._socketCloseHandler);
+
+    this._resolved = false;
+}
+
+util.inherits(WebSocketRequest, EventEmitter);
+
+WebSocketRequest.prototype.readHandshake = function() {
+    var self = this;
+    var request = this.httpRequest;
+
+    // Decode URL
+    this.resourceURL = url.parse(this.resource, true);
+
+    this.host = request.headers['host'];
+    if (!this.host) {
+        throw new Error('Client must provide a Host header.');
+    }
+
+    this.key = request.headers['sec-websocket-key'];
+    if (!this.key) {
+        throw new Error('Client must provide a value for Sec-WebSocket-Key.');
+    }
+
+    this.webSocketVersion = parseInt(request.headers['sec-websocket-version'], 10);
+
+    if (!this.webSocketVersion || isNaN(this.webSocketVersion)) {
+        throw new Error('Client must provide a value for Sec-WebSocket-Version.');
+    }
+
+    switch (this.webSocketVersion) {
+        case 8:
+        case 13:
+            break;
+        default:
+            var e = new Error('Unsupported websocket client version: ' + this.webSocketVersion +
+                              'Only versions 8 and 13 are supported.');
+            e.httpCode = 426;
+            e.headers = {
+                'Sec-WebSocket-Version': '13'
+            };
+            throw e;
+    }
+
+    if (this.webSocketVersion === 13) {
+        this.origin = request.headers['origin'];
+    }
+    else if (this.webSocketVersion === 8) {
+        this.origin = request.headers['sec-websocket-origin'];
+    }
+
+    // Protocol is optional.
+    var protocolString = request.headers['sec-websocket-protocol'];
+    this.protocolFullCaseMap = {};
+    this.requestedProtocols = [];
+    if (protocolString) {
+        var requestedProtocolsFullCase = protocolString.split(headerValueSplitRegExp);
+        requestedProtocolsFullCase.forEach(function(protocol) {
+            var lcProtocol = protocol.toLocaleLowerCase();
+            self.requestedProtocols.push(lcProtocol);
+            self.protocolFullCaseMap[lcProtocol] = protocol;
+        });
+    }
+
+    if (!this.serverConfig.ignoreXForwardedFor &&
+        request.headers['x-forwarded-for']) {
+        var immediatePeerIP = this.remoteAddress;
+        this.remoteAddresses = request.headers['x-forwarded-for']
+            .split(xForwardedForSeparatorRegExp);
+        this.remoteAddresses.push(immediatePeerIP);
+        this.remoteAddress = this.remoteAddresses[0];
+    }
+
+    // Extensions are optional.
+    var extensionsString = request.headers['sec-websocket-extensions'];
+    this.requestedExtensions = this.parseExtensions(extensionsString);
+
+    // Cookies are optional
+    var cookieString = request.headers['cookie'];
+    this.cookies = this.parseCookies(cookieString);
+};
+
+WebSocketRequest.prototype.parseExtensions = function(extensionsString) {
+    if (!extensionsString || extensionsString.length === 0) {
+        return [];
+    }
+    var extensions = extensionsString.toLocaleLowerCase().split(headerValueSplitRegExp);
+    extensions.forEach(function(extension, index, array) {
+        var params = extension.split(headerParamSplitRegExp);
+        var extensionName = params[0];
+        var extensionParams = params.slice(1);
+        extensionParams.forEach(function(rawParam, index, array) {
+            var arr = rawParam.split('=');
+            var obj = {
+                name: arr[0],
+                value: arr[1]
+            };
+            array.splice(index, 1, obj);
+        });
+        var obj = {
+            name: extensionName,
+            params: extensionParams
+        };
+        array.splice(index, 1, obj);
+    });
+    return extensions;
+};
+
+// This function adapted from node-cookie
+// https://github.com/shtylman/node-cookie
+WebSocketRequest.prototype.parseCookies = function(str) {
+    // Sanity Check
+    if (!str || typeof(str) !== 'string') {
+        return [];
+    }
+
+    var cookies = [];
+    var pairs = str.split(cookieSeparatorRegEx);
+
+    pairs.forEach(function(pair) {
+        var eq_idx = pair.indexOf('=');
+        if (eq_idx === -1) {
+            cookies.push({
+                name: pair,
+                value: null
+            });
+            return;
+        }
+
+        var key = pair.substr(0, eq_idx).trim();
+        var val = pair.substr(++eq_idx, pair.length).trim();
+
+        // quoted values
+        if ('"' === val[0]) {
+            val = val.slice(1, -1);
+        }
+
+        cookies.push({
+            name: key,
+            value: decodeURIComponent(val)
+        });
+    });
+
+    return cookies;
+};
+
+WebSocketRequest.prototype.accept = function(acceptedProtocol, allowedOrigin, cookies) {
+    this._verifyResolution();
+    
+    // TODO: Handle extensions
+
+    var protocolFullCase;
+
+    if (acceptedProtocol) {
+        protocolFullCase = this.protocolFullCaseMap[acceptedProtocol.toLocaleLowerCase()];
+        if (typeof(protocolFullCase) === 'undefined') {
+            protocolFullCase = acceptedProtocol;
+        }
+    }
+    else {
+        protocolFullCase = acceptedProtocol;
+    }
+    this.protocolFullCaseMap = null;
+
+    var response = this.httpRequest._response;
+    response.statusCode = 101;
+
+    if (protocolFullCase) {
+        // validate protocol
+        for (var i=0; i < protocolFullCase.length; i++) {
+            var charCode = protocolFullCase.charCodeAt(i);
+            var character = protocolFullCase.charAt(i);
+            if (charCode < 0x21 || charCode > 0x7E || separators.indexOf(character) !== -1) {
+                this.reject(500);
+                throw new Error('Illegal character "' + String.fromCharCode(character) + '" in subprotocol.');
+            }
+        }
+        if (this.requestedProtocols.indexOf(acceptedProtocol) === -1) {
+            this.reject(500);
+            throw new Error('Specified protocol was not requested by the client.');
+        }
+
+        protocolFullCase = protocolFullCase.replace(headerSanitizeRegExp, '');
+        response += 'Sec-WebSocket-Protocol: ' + protocolFullCase + '\r\n';
+    }
+    this.requestedProtocols = null;
+
+    if (allowedOrigin) {
+        allowedOrigin = allowedOrigin.replace(headerSanitizeRegExp, '');
+        if (this.webSocketVersion === 13) {
+            response.setHeader('Origin', allowedOrigin);
+        }
+        else if (this.webSocketVersion === 8) {
+            response.setHeader('Sec-WebSocket-Origin', allowedOrigin);
+        }
+    }
+
+    if (cookies) {
+        if (!Array.isArray(cookies)) {
+            this.reject(500);
+            throw new Error('Value supplied for "cookies" argument must be an array.');
+        }
+        var seenCookies = {};
+        cookies.forEach(function(cookie) {
+            if (!cookie.name || !cookie.value) {
+                this.reject(500);
+                throw new Error('Each cookie to set must at least provide a "name" and "value"');
+            }
+
+            // Make sure there are no \r\n sequences inserted
+            cookie.name = cookie.name.replace(controlCharsAndSemicolonRegEx, '');
+            cookie.value = cookie.value.replace(controlCharsAndSemicolonRegEx, '');
+
+            if (seenCookies[cookie.name]) {
+                this.reject(500);
+                throw new Error('You may not specify the same cookie name twice.');
+            }
+            seenCookies[cookie.name] = true;
+
+            // token (RFC 2616, Section 2.2)
+            var invalidChar = cookie.name.match(cookieNameValidateRegEx);
+            if (invalidChar) {
+                this.reject(500);
+                throw new Error('Illegal character ' + invalidChar[0] + ' in cookie name');
+            }
+
+            // RFC 6265, Section 4.1.1
+            // *cookie-octet / ( DQUOTE *cookie-octet DQUOTE ) | %x21 / %x23-2B / %x2D-3A / %x3C-5B / %x5D-7E
+            if (cookie.value.match(cookieValueDQuoteValidateRegEx)) {
+                invalidChar = cookie.value.slice(1, -1).match(cookieValueValidateRegEx);
+            } else {
+                invalidChar = cookie.value.match(cookieValueValidateRegEx);
+            }
+            if (invalidChar) {
+                this.reject(500);
+                throw new Error('Illegal character ' + invalidChar[0] + ' in cookie value');
+            }
+
+            var cookieParts = [cookie.name + '=' + cookie.value];
+
+            // RFC 6265, Section 4.1.1
+            // 'Path=' path-value | <any CHAR except CTLs or ';'>
+            if(cookie.path){
+                invalidChar = cookie.path.match(controlCharsAndSemicolonRegEx);
+                if (invalidChar) {
+                    this.reject(500);
+                    throw new Error('Illegal character ' + invalidChar[0] + ' in cookie path');
+                }
+                cookieParts.push('Path=' + cookie.path);
+            }
+
+            // RFC 6265, Section 4.1.2.3
+            // 'Domain=' subdomain
+            if (cookie.domain) {
+                if (typeof(cookie.domain) !== 'string') {
+                    this.reject(500);
+                    throw new Error('Domain must be specified and must be a string.');
+                }
+                invalidChar = cookie.domain.match(controlCharsAndSemicolonRegEx);
+                if (invalidChar) {
+                    this.reject(500);
+                    throw new Error('Illegal character ' + invalidChar[0] + ' in cookie domain');
+                }
+                cookieParts.push('Domain=' + cookie.domain.toLowerCase());
+            }
+
+            // RFC 6265, Section 4.1.1
+            //'Expires=' sane-cookie-date | Force Date object requirement by using only epoch
+            if (cookie.expires) {
+                if (!(cookie.expires instanceof Date)){
+                    this.reject(500);
+                    throw new Error('Value supplied for cookie "expires" must be a vaild date object');
+                }
+                cookieParts.push('Expires=' + cookie.expires.toGMTString());
+            }
+
+            // RFC 6265, Section 4.1.1
+            //'Max-Age=' non-zero-digit *DIGIT
+            if (cookie.maxage) {
+                var maxage = cookie.maxage;
+                if (typeof(maxage) === 'string') {
+                    maxage = parseInt(maxage, 10);
+                }
+                if (isNaN(maxage) || maxage <= 0 ) {
+                    this.reject(500);
+                    throw new Error('Value supplied for cookie "maxage" must be a non-zero number');
+                }
+                maxage = Math.round(maxage);
+                cookieParts.push('Max-Age=' + maxage.toString(10));
+            }
+
+            // RFC 6265, Section 4.1.1
+            //'Secure;'
+            if (cookie.secure) {
+                if (typeof(cookie.secure) !== 'boolean') {
+                    this.reject(500);
+                    throw new Error('Value supplied for cookie "secure" must be of type boolean');
+                }
+                cookieParts.push('Secure');
+            }
+
+            // RFC 6265, Section 4.1.1
+            //'HttpOnly;'
+            if (cookie.httponly) {
+                if (typeof(cookie.httponly) !== 'boolean') {
+                    this.reject(500);
+                    throw new Error('Value supplied for cookie "httponly" must be of type boolean');
+                }
+                cookieParts.push('HttpOnly');
+            }
+
+            response.addHeader('Set-Cookie', cookieParts.join(';'));
+        }.bind(this));
+    }
+
+    // TODO: handle negotiated extensions
+    // if (negotiatedExtensions) {
+    //     response += 'Sec-WebSocket-Extensions: ' + negotiatedExtensions.join(', ') + '\r\n';
+    // }
+    
+    // Mark the request resolved now so that the user can't call accept or
+    // reject a second time.
+    this._resolved = true;
+    this.emit('requestResolved', this);
+
+    var connection = new WebSocketConnection(this.socket, [], acceptedProtocol, false, this.serverConfig);
+    connection.webSocketVersion = this.webSocketVersion;
+    connection.remoteAddress = this.remoteAddress;
+    connection.remoteAddresses = this.remoteAddresses;
+
+    var self = this;
+
+    if (this._socketIsClosing) {
+        // Handle case when the client hangs up before we get a chance to
+        // accept the connection and send our side of the opening handshake.
+        cleanupFailedConnection(connection);
+
+    } else {
+        response._sendHeaders();
+        connection._addSocketEventListeners();
+    }
+
+    this.emit('requestAccepted', connection);
+    return connection;
+};
+
+WebSocketRequest.prototype.reject = function(status, reason, extraHeaders) {
+    this._verifyResolution();
+    
+    // Mark the request resolved now so that the user can't call accept or
+    // reject a second time.
+    this._resolved = true;
+    this.emit('requestResolved', this);
+    
+    if (typeof(status) !== 'number') {
+        status = 403;
+    }
+
+    var response = this.httpRequest._response;
+
+    response.statusCode = status;
+
+    if (reason) {
+        reason = reason.replace(headerSanitizeRegExp, '');
+        response.addHeader('X-WebSocket-Reject-Reason', reason);
+    }
+
+    if (extraHeaders) {
+        for (var key in extraHeaders) {
+            var sanitizedValue = extraHeaders[key].toString().replace(headerSanitizeRegExp, '');
+            var sanitizedKey = key.replace(headerSanitizeRegExp, '');
+            response += (sanitizedKey + ': ' + sanitizedValue + '\r\n');
+        }
+    }
+
+    response.end();
+
+    this.emit('requestRejected', this);
+};
+
+WebSocketRequest.prototype._handleSocketCloseBeforeAccept = function() {
+    this._socketIsClosing = true;
+    this._removeSocketCloseListeners();
+};
+
+WebSocketRequest.prototype._removeSocketCloseListeners = function() {
+    this.socket.removeListener('end', this._socketCloseHandler);
+    this.socket.removeListener('close', this._socketCloseHandler);
+};
+
+WebSocketRequest.prototype._verifyResolution = function() {
+    if (this._resolved) {
+        throw new Error('WebSocketRequest may only be accepted or rejected one time.');
+    }
+};
+
+function cleanupFailedConnection(connection) {
+    // Since we have to return a connection object even if the socket is
+    // already dead in order not to break the API, we schedule a 'close'
+    // event on the connection object to occur immediately.
+    process.nextTick(function() {
+        // WebSocketConnection.CLOSE_REASON_ABNORMAL = 1006
+        // Third param: Skip sending the close frame to a dead socket
+        connection.drop(1006, 'TCP connection lost before handshake completed.', true);
+    });
+}
+
+module.exports = WebSocketRequest;
diff --git a/src/nodejs/unit-http/websocket_router.js b/src/nodejs/unit-http/websocket_router.js
new file mode 100644
index 00000000..4efa35d2
--- /dev/null
+++ b/src/nodejs/unit-http/websocket_router.js
@@ -0,0 +1,157 @@
+/************************************************************************
+ *  Copyright 2010-2015 Brian McKelvey.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ ***********************************************************************/
+
+var extend = require('./utils').extend;
+var util = require('util');
+var EventEmitter = require('events').EventEmitter;
+var WebSocketRouterRequest = require('./websocket_router_request');
+
+function WebSocketRouter(config) {
+    // Superclass Constructor
+    EventEmitter.call(this);
+
+    this.config = {
+        // The WebSocketServer instance to attach to.
+        server: null
+    };
+    if (config) {
+        extend(this.config, config);
+    }
+    this.handlers = [];
+
+    this._requestHandler = this.handleRequest.bind(this);
+    if (this.config.server) {
+        this.attachServer(this.config.server);
+    }
+}
+
+util.inherits(WebSocketRouter, EventEmitter);
+
+WebSocketRouter.prototype.attachServer = function(server) {
+    if (server) {
+        this.server = server;
+        this.server.on('request', this._requestHandler);
+    }
+    else {
+        throw new Error('You must specify a WebSocketServer instance to attach to.');
+    }
+};
+
+WebSocketRouter.prototype.detachServer = function() {
+    if (this.server) {
+        this.server.removeListener('request', this._requestHandler);
+        this.server = null;
+    }
+    else {
+        throw new Error('Cannot detach from server: not attached.');
+    }
+};
+
+WebSocketRouter.prototype.mount = function(path, protocol, callback) {
+    if (!path) {
+        throw new Error('You must specify a path for this handler.');
+    }
+    if (!protocol) {
+        protocol = '____no_protocol____';
+    }
+    if (!callback) {
+        throw new Error('You must specify a callback for this handler.');
+    }
+
+    path = this.pathToRegExp(path);
+    if (!(path instanceof RegExp)) {
+        throw new Error('Path must be specified as either a string or a RegExp.');
+    }
+    var pathString = path.toString();
+
+    // normalize protocol to lower-case
+    protocol = protocol.toLocaleLowerCase();
+
+    if (this.findHandlerIndex(pathString, protocol) !== -1) {
+        throw new Error('You may only mount one handler per path/protocol combination.');
+    }
+
+    this.handlers.push({
+        'path': path,
+        'pathString': pathString,
+        'protocol': protocol,
+        'callback': callback
+    });
+};
+WebSocketRouter.prototype.unmount = function(path, protocol) {
+    var index = this.findHandlerIndex(this.pathToRegExp(path).toString(), protocol);
+    if (index !== -1) {
+        this.handlers.splice(index, 1);
+    }
+    else {
+        throw new Error('Unable to find a route matching the specified path and protocol.');
+    }
+};
+
+WebSocketRouter.prototype.findHandlerIndex = function(pathString, protocol) {
+    protocol = protocol.toLocaleLowerCase();
+    for (var i=0, len=this.handlers.length; i < len; i++) {
+        var handler = this.handlers[i];
+        if (handler.pathString === pathString && handler.protocol === protocol) {
+            return i;
+        }
+    }
+    return -1;
+};
+
+WebSocketRouter.prototype.pathToRegExp = function(path) {
+    if (typeof(path) === 'string') {
+        if (path === '*') {
+            path = /^.*$/;
+        }
+        else {
+            path = path.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
+            path = new RegExp('^' + path + '$');
+        }
+    }
+    return path;
+};
+
+WebSocketRouter.prototype.handleRequest = function(request) {
+    var requestedProtocols = request.requestedProtocols;
+    if (requestedProtocols.length === 0) {
+        requestedProtocols = ['____no_protocol____'];
+    }
+
+    // Find a handler with the first requested protocol first
+    for (var i=0; i < requestedProtocols.length; i++) {
+        var requestedProtocol = requestedProtocols[i].toLocaleLowerCase();
+
+        // find the first handler that can process this request
+        for (var j=0, len=this.handlers.length; j < len; j++) {
+            var handler = this.handlers[j];
+            if (handler.path.test(request.resourceURL.pathname)) {
+                if (requestedProtocol === handler.protocol ||
+                    handler.protocol === '*')
+                {
+                    var routerRequest = new WebSocketRouterRequest(request, requestedProtocol);
+                    handler.callback(routerRequest);
+                    return;
+                }
+            }
+        }
+    }
+
+    // If we get here we were unable to find a suitable handler.
+    request.reject(404, 'No handler is available for the given request.');
+};
+
+module.exports = WebSocketRouter;
diff --git a/src/nodejs/unit-http/websocket_router_request.js b/src/nodejs/unit-http/websocket_router_request.js
new file mode 100644
index 00000000..d3e37457
--- /dev/null
+++ b/src/nodejs/unit-http/websocket_router_request.js
@@ -0,0 +1,54 @@
+/************************************************************************
+ *  Copyright 2010-2015 Brian McKelvey.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ ***********************************************************************/
+
+var util = require('util');
+var EventEmitter = require('events').EventEmitter;
+
+function WebSocketRouterRequest(webSocketRequest, resolvedProtocol) {
+    // Superclass Constructor
+    EventEmitter.call(this);
+
+    this.webSocketRequest = webSocketRequest;
+    if (resolvedProtocol === '____no_protocol____') {
+        this.protocol = null;
+    }
+    else {
+        this.protocol = resolvedProtocol;
+    }
+    this.origin = webSocketRequest.origin;
+    this.resource = webSocketRequest.resource;
+    this.resourceURL = webSocketRequest.resourceURL;
+    this.httpRequest = webSocketRequest.httpRequest;
+    this.remoteAddress = webSocketRequest.remoteAddress;
+    this.webSocketVersion = webSocketRequest.webSocketVersion;
+    this.requestedExtensions = webSocketRequest.requestedExtensions;
+    this.cookies = webSocketRequest.cookies;
+}
+
+util.inherits(WebSocketRouterRequest, EventEmitter);
+
+WebSocketRouterRequest.prototype.accept = function(origin, cookies) {
+    var connection = this.webSocketRequest.accept(this.protocol, origin, cookies);
+    this.emit('requestAccepted', connection);
+    return connection;
+};
+
+WebSocketRouterRequest.prototype.reject = function(status, reason, extraHeaders) {
+    this.webSocketRequest.reject(status, reason, extraHeaders);
+    this.emit('requestRejected', this);
+};
+
+module.exports = WebSocketRouterRequest;
diff --git a/src/nodejs/unit-http/websocket_server.js b/src/nodejs/unit-http/websocket_server.js
new file mode 100644
index 00000000..306f3f67
--- /dev/null
+++ b/src/nodejs/unit-http/websocket_server.js
@@ -0,0 +1,213 @@
+/************************************************************************
+ *  Copyright 2010-2015 Brian McKelvey.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ ***********************************************************************/
+
+var extend = require('./utils').extend;
+var utils = require('./utils');
+var util = require('util');
+var EventEmitter = require('events').EventEmitter;
+var WebSocketRequest = require('./websocket_request');
+
+var WebSocketServer = function WebSocketServer(config) {
+    // Superclass Constructor
+    EventEmitter.call(this);
+
+    this._handlers = {
+        upgrade: this.handleUpgrade.bind(this),
+        requestAccepted: this.handleRequestAccepted.bind(this),
+        requestResolved: this.handleRequestResolved.bind(this)
+    };
+    this.connections = [];
+    this.pendingRequests = [];
+    if (config) {
+        this.mount(config);
+    }
+};
+
+util.inherits(WebSocketServer, EventEmitter);
+
+WebSocketServer.prototype.mount = function(config) {
+    this.config = {
+        // The http server instance to attach to.  Required.
+        httpServer: null,
+
+        // 64KiB max frame size.
+        maxReceivedFrameSize: 0x10000,
+
+        // 1MiB max message size, only applicable if
+        // assembleFragments is true
+        maxReceivedMessageSize: 0x100000,
+
+        // Outgoing messages larger than fragmentationThreshold will be
+        // split into multiple fragments.
+        fragmentOutgoingMessages: true,
+
+        // Outgoing frames are fragmented if they exceed this threshold.
+        // Default is 16KiB
+        fragmentationThreshold: 0x4000,
+
+        // If true, fragmented messages will be automatically assembled
+        // and the full message will be emitted via a 'message' event.
+        // If false, each frame will be emitted via a 'frame' event and
+        // the application will be responsible for aggregating multiple
+        // fragmented frames.  Single-frame messages will emit a 'message'
+        // event in addition to the 'frame' event.
+        // Most users will want to leave this set to 'true'
+        assembleFragments: true,
+
+        // If this is true, websocket connections will be accepted
+        // regardless of the path and protocol specified by the client.
+        // The protocol accepted will be the first that was requested
+        // by the client.  Clients from any origin will be accepted.
+        // This should only be used in the simplest of cases.  You should
+        // probably leave this set to 'false' and inspect the request
+        // object to make sure it's acceptable before accepting it.
+        autoAcceptConnections: false,
+
+        // Whether or not the X-Forwarded-For header should be respected.
+        // It's important to set this to 'true' when accepting connections
+        // from untrusted clients, as a malicious client could spoof its
+        // IP address by simply setting this header.  It's meant to be added
+        // by a trusted proxy or other intermediary within your own
+        // infrastructure.
+        // See:  http://en.wikipedia.org/wiki/X-Forwarded-For
+        ignoreXForwardedFor: false,
+
+        // The Nagle Algorithm makes more efficient use of network resources
+        // by introducing a small delay before sending small packets so that
+        // multiple messages can be batched together before going onto the
+        // wire.  This however comes at the cost of latency, so the default
+        // is to disable it.  If you don't need low latency and are streaming
+        // lots of small messages, you can change this to 'false'
+        disableNagleAlgorithm: true,
+
+        // The number of milliseconds to wait after sending a close frame
+        // for an acknowledgement to come back before giving up and just
+        // closing the socket.
+        closeTimeout: 5000
+    };
+    extend(this.config, config);
+
+    if (this.config.httpServer) {
+        if (!Array.isArray(this.config.httpServer)) {
+            this.config.httpServer = [this.config.httpServer];
+        }
+        var upgradeHandler = this._handlers.upgrade;
+        this.config.httpServer.forEach(function(httpServer) {
+            httpServer.on('upgrade', upgradeHandler);
+        });
+    }
+    else {
+        throw new Error('You must specify an httpServer on which to mount the WebSocket server.');
+    }
+};
+
+WebSocketServer.prototype.unmount = function() {
+    var upgradeHandler = this._handlers.upgrade;
+    this.config.httpServer.forEach(function(httpServer) {
+        httpServer.removeListener('upgrade', upgradeHandler);
+    });
+};
+
+WebSocketServer.prototype.closeAllConnections = function() {
+    this.connections.forEach(function(connection) {
+        connection.close();
+    });
+    this.pendingRequests.forEach(function(request) {
+        process.nextTick(function() {
+          request.reject(503); // HTTP 503 Service Unavailable
+        });
+    });
+};
+
+WebSocketServer.prototype.broadcast = function(data) {
+    if (Buffer.isBuffer(data)) {
+        this.broadcastBytes(data);
+    }
+    else if (typeof(data.toString) === 'function') {
+        this.broadcastUTF(data);
+    }
+};
+
+WebSocketServer.prototype.broadcastUTF = function(utfData) {
+    this.connections.forEach(function(connection) {
+        connection.sendUTF(utfData);
+    });
+};
+
+WebSocketServer.prototype.broadcastBytes = function(binaryData) {
+    this.connections.forEach(function(connection) {
+        connection.sendBytes(binaryData);
+    });
+};
+
+WebSocketServer.prototype.shutDown = function() {
+    this.unmount();
+    this.closeAllConnections();
+};
+
+WebSocketServer.prototype.handleUpgrade = function(request, socket) {
+    var wsRequest = new WebSocketRequest(socket, request, this.config);
+    try {
+        wsRequest.readHandshake();
+    }
+    catch(e) {
+        wsRequest.reject(
+            e.httpCode ? e.httpCode : 400,
+            e.message,
+            e.headers
+        );
+        return;
+    }
+
+    this.pendingRequests.push(wsRequest);
+
+    wsRequest.once('requestAccepted', this._handlers.requestAccepted);
+    wsRequest.once('requestResolved', this._handlers.requestResolved);
+
+    if (!this.config.autoAcceptConnections && utils.eventEmitterListenerCount(this, 'request') > 0) {
+        this.emit('request', wsRequest);
+    }
+    else if (this.config.autoAcceptConnections) {
+        wsRequest.accept(wsRequest.requestedProtocols[0], wsRequest.origin);
+    }
+    else {
+        wsRequest.reject(404, 'No handler is configured to accept the connection.');
+    }
+};
+
+WebSocketServer.prototype.handleRequestAccepted = function(connection) {
+    var self = this;
+    connection.once('close', function(closeReason, description) {
+        self.handleConnectionClose(connection, closeReason, description);
+    });
+    this.connections.push(connection);
+    this.emit('connect', connection);
+};
+
+WebSocketServer.prototype.handleConnectionClose = function(connection, closeReason, description) {
+    var index = this.connections.indexOf(connection);
+    if (index !== -1) {
+        this.connections.splice(index, 1);
+    }
+    this.emit('close', connection, closeReason, description);
+};
+
+WebSocketServer.prototype.handleRequestResolved = function(request) {
+    var index = this.pendingRequests.indexOf(request);
+    if (index !== -1) { this.pendingRequests.splice(index, 1); }
+};
+
+module.exports = WebSocketServer;