ajax websocket

Introduction and principle of websocket WebSocket protocol is a new protocol for HTML5. It implements browser-to-server full-duplex communication (Full-duplex). The first handshake needs to be done with an HTTP request. --Baidu Encyclopedia Purpose: Instant messaging instead of pollingThe Instant Messenger on the website is very common, such as the QQ of the webpage, chat system and so on.

information exchanged between the server and the client is small.WebSocket is not limited to communicating in Ajax (or XHR), because Ajax technology requires client-initiated requests, and WebSocket servers and clients can push information to each other;For a detailed introduction of Ajax,comet,

request can only be initiated by the client and the server responds to the request. This communication model has one drawback: the HTTP protocol cannot implement the server to initiate the message to the client actively. Therefore, if the client wants to listen to server changes in real time, Ajax must be used for polling, inefficient, and wasteful of resources. And WebSocket can make the * * front and bac

onclick event. What we're going to do is probably the following steps: 1. Get input2. The data needed to assemble a string3. Send to the background the first step is simple, using jquery for a second, the second step can be done using the Json.stringify () method, The third step is to use the Stompclient send method, the Send method has three parameters, the first is to send the address, the second parameter is the header information, the third parameter is the message body, so sendname the ove

takes up a lot of bandwidth and server resources. and the newer technology to do polling effect is comet, using Ajax. However, although this technology can achieve two-way communication, but still need to make a request, and in comet, the widespread adoption of long links, which also consumes a lot of server bandwidth and resources. In the face of this situation, HTML5 defines the WebSocket protocol, which

Websocket is introduced in HTML. Because the graduation project needs to use the chat room function, we have studied the application of websocket. To use websocket on the client, you need to create a websocket object. You can use the open, send, message, and close methods provided to create, send, listen to, and clos

Web projects often need to push data to customers as quickly as possible, without waiting for client requests when necessary. 　　A two-way communication mechanism is ideal for sites that communicate with users in real time, such as online communication or document collaboration tools, or to update system state on long-running compute/execution servers. Previously, this type of problem generally used the following solution:? Using the Socket connection (http://help.adobe.com/en_US/FlashPlatform/re

Concept As a next-generation Web Standard, HTML5 has a number of compelling new features, such as canvas, local storage, multimedia programming interfaces, WebSocket, and so on. Today we'll take a look at the WebSocket, which is called "Web TCP." The emergence of WebSocket is based on the real-time needs of Web applications. This kind of real-time web application

the server to take the money back to go, or the client is too long, has exceeded its set waiting time, it will end the task of borrowing money, and then some time, come and see The server is not already rich. If it is, the client constantly and the server for money, to come, take it, and then to take a trip, away, then this method and Ajax polling no difference. Terminology: When there is no data update on the server side, the connection is maintaine

Generally, the user information registered on a traditional web page is submitted to the page through post or ajax. After HTML 5 is reached, another method is to perform data interaction through websocket. Next, we will introduce it in detail, for more information, see Register User information on a traditional web page through post or ajax, after HTML5, we can u

Today talk about timely communication, suddenly be asked to push the way, or timed to accept the way, because the previous pages are used in the traditional AJAX processing, may be the timing of Ajax is deeply rooted, so there is no same how the same how will appear to push the way?The thread was suddenly caught in the head when it was mentioned websocket.First, WebSock