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]
Real-Time Web Test - Does your browser supports WebSockets? 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.
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. 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. With polling , the browser sends HTTP requests at regular intervals and immediately receives a response. HTML5 Web Sockets to the Rescue!
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
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. 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 A proxy server is a server that acts as an intermediary between a client and another server (for example, a web server on the Internet). Let's recap.
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 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. 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. Notifications of changes to this specification are sent along with notifications of changes to related specifications using the following mechanisms: E-mail notifications of changes Commit-Watchers mailing list (complete source diffs):
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