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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: 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.

HTTP Streaming From Ajax Patterns Please see discussion page for an alternate approach to HTTP streaming from what is listed below! Evidence: 1/3 Tags: Comet Connection Duplex Live Persistent Publish Push RealTime Refresh Remoting RemoteScripting Stateful Stream TwoWay Update APE Ajax Push Engine How can the browser receive events and responses from the server? The state of many web applications is inherently volatile. Stream server data in the response of a long-lived HTTP connection. "Page Streaming" involves streaming the original page response. For example, the server can initially output a div which will always contain the latest news. print ("<div id='news'></div>"); But instead of exiting, it starts a loop to update the item every 10 seconds. <? That illustrates the basic technique, and there are some refinements discussed below and in the Design Decisions. "Page Streaming" means the browser discovers server changes almost immediately. How long will you keep the connection open? Caplin Liberator WebSync

Push technology General use[edit] Push services are often based on information preferences expressed in advance. This is called a publish/subscribe model. Synchronous conferencing and instant messaging are typical examples of push services. Other uses of push-enabled web applications include market data distribution (stock tickers), online chat/messaging systems (webchat), auctions, online betting and gaming, sport results, monitoring consoles, and sensor network monitoring. Examples[edit] HTTP server push[edit] HTTP server push (also known as HTTP streaming) is a mechanism for sending unsolicited (asynchronous) data from a web server to a web browser. Generally the web server does not terminate a connection after response data has been served to a client. The WHATWG Web Applications 1.0 proposal[3] includes a mechanism to push content to the client. Pushlet[edit] Long polling[edit] Flash XMLSocket relays[edit] See also[edit] References[edit] <Realtime's push beats Ajax pull> [1] External links[edit]

HTTP Streaming Comet (programming) Comet is a web application model in which a long-held HTTP request allows a web server to push data to a browser, without the browser explicitly requesting it.[1][2] Comet is an umbrella term, encompassing multiple techniques for achieving this interaction. All these methods rely on features included by default in browsers, such as JavaScript, rather than on non-default plugins. The Comet approach differs from the original model of the web, in which a browser requests a complete web page at a time.[3] The use of Comet techniques in web development predates the use of the word Comet as a neologism for the collective techniques. The ability to embed Java applets into browsers (starting with Netscape 2.0 in March 1996[10]) made real-time communications possible, using a raw TCP socket[11] to communicate between the browser and the server. Even if not yet known by that name, the very first Comet implementations date back to 2000,[18] with the Pushlets, Lightstreamer, and KnowNow projects.

WebSockets, HTTP Streaming, Comet, etc. À la pointe - Comprendre la puissance des WebSockets À l'heure actuelle, le World Wide Web n'est pas conçu pour être un moyen de communication en temps réel. Les applications Web donnent une impression de continuité grâce aux solutions d'interrogation classiques implémentées via AJAX ou peut-être aux requêtes à interrogation longue, alors qu'elles sont en fait implémentées par des bibliothèques ad hoc telles que SignalR et Comet. Pour les besoins de la plupart des applications, l'interrogation est une bonne solution, bien qu'elle risque de pâtir d'une latence client vers serveur et serveur vers client. Dans cet article, je vais explorer une nouvelle alternative nommée WebSocket. L'intégration croissante entre les applications Web et mobiles avec les réseaux sociaux réduit le seuil de délai tolérable dans l'interaction client/serveur. Lorsque vous mettez à jour votre statut Facebook, vous voulez que cette information soit disponible immédiatement pour vos amis. Le protocole WebSocket Utilisation du protocole WebSocket aujourd'hui

WebSockets Power Soccer Review, Tips, Guide, Cheats power soccer (6) la power soccer (5) la power soccer (4) la power soccer (3) la power soccer (2) la power soccer (1) la Overview What’s explosive about it: Good Playerbase Smooth Gameplay Mouse Control Power Soccer is the web’s best free 3D action football game! Featured Video Power Soccer Clip 2 Runtime Beaconpush PubNub