WebSocket. WebSocket is a protocol providing full-duplex communications channels over a single TCP connection. The WebSocket protocol was standardized by the IETF as RFC 6455 in 2011, and the WebSocket API in Web IDL is being standardized by the W3C. Technical overview[edit] Browser implementation[edit] WebSocket protocol handshake[edit] To establish a WebSocket connection, the client sends a WebSocket handshake request, for which the server returns a WebSocket handshake response, as shown in the following example:[9]:section 1.2 Client request: GET /chat HTTP/1.1 Host: server.example.com Upgrade: websocket Connection: Upgrade Sec-WebSocket-Key: x3JJHMbDL1EzLkh9GBhXDw== Sec-WebSocket-Protocol: chat, superchat Sec-WebSocket-Version: 13 Origin: Server response: HTTP/1.1 101 Switching Protocols Upgrade: websocket Connection: Upgrade Sec-WebSocket-Accept: HSmrc0sMlYUkAGmm5OPpG2HaGWk= Sec-WebSocket-Protocol: chat Note that each line ends with an EOL (end of line) sequence, \r\n.
Real-Time Web Test - Does your browser supports WebSockets? WebSocket.org -- A WebSocket Community. HTML5 Web Sockets: A Quantum Leap in Scalability for the Web. Lately there has been a lot of buzz around HTML5 Web Sockets, which defines a full-duplex communication channel that operates through a single socket over the Web. HTML5 Web Sockets is not just another incremental enhancement to conventional HTTP communications; it represents a colossal advance, especially for real-time, event-driven web applications. HTML5 Web Sockets provides such a dramatic improvement from the old, convoluted "hacks" that are used to simulate a full-duplex connection in a browser that it prompted Google's Ian Hickson - the HTML5 specification lead - to say: " Reducing kilobytes of data to 2 bytes...and reducing latency from 150ms to 50ms is far more than marginal.
In fact, these two factors alone are enough to make Web Sockets seriously interesting to Google. " Let's look at how HTML5 Web Sockets can offer such an incredibly dramatic reduction of unnecessary network traffic and latency by comparing it to conventional solutions. HTML5 Web Sockets to the Rescue! How HTML5 Web Sockets Interact With Proxy Servers. With the recent explosion of WebSocket server implementations, a lot of questions have come up about how HTML5 Web Sockets deal with proxy servers, firewalls, and load-balancing routers. Will proxy servers automatically kill WebSocket connections?
Do HTML5 Web Sockets handle firewalls and proxy server issues better than Comet? Are Web Sockets the silver bullet in seamless proxy server traversal? In this article, I’ll explain how HTML5 Web Sockets interact with proxy servers, load balancing routers, and firewalls. Additionally, I’ll explain how Kaazing WebSocket Gateway and its Web Socket emulation can add additional value. About HTML5 Web Sockets and Proxy Servers Let's start with some basic concepts: what exactly are HTML5 Web Sockets and proxy servers? HTML5 Web Sockets The HTML5 Web Sockets specification defines the Web Sockets API that enables web pages to use the Web Socket protocol for full-duplex communication with a remote host. Proxy Servers HTML5 Web Sockets and Proxy Servers.
The WebSocket API. Abstract This specification defines an API that enables Web pages to use the WebSocket protocol (defined by the IETF) for two-way communication with a remote host. Status of This document This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the most recently formally published revision of this technical report can be found in the W3C technical reports index at If you wish to make comments regarding this document, you can enter feedback using this form: You can also e-mail feedback to public-webapps@w3.org (subscribe, archives), or whatwg@whatwg.org (subscribe, archives).
Implementors should be aware that this specification is not stable. The latest stable version of the editor's draft of this specification is always available on the W3C CVS server and in the WHATWG Subversion repository. E-mail notifications of changes Table of Contents 1 Introduction WebIDL. Introducing WebSockets: Bringing Sockets to the Web. The Problem: Low Latency Client-Server and Server-Client Connections The web has been largely built around the so-called request/response paradigm of HTTP. A client loads up a web page and then nothing happens until the user clicks onto the next page. Around 2005, AJAX started to make the web feel more dynamic.
Still, all HTTP communication was steered by the client, which required user interaction or periodic polling to load new data from the server. However, all of these work-arounds share one problem: They carry the overhead of HTTP, which doesn't make them well suited for low latency applications. Introducing WebSocket: Bringing Sockets to the Web The WebSocket specification defines an API establishing "socket" connections between a web browser and a server.
Getting Started You open up a WebSocket connection simply by calling the WebSocket constructor: var connection = new WebSocket(' ['soap', 'xmpp']); Notice the ws:. Communicating with the Server.