comet simulator

Generally, web applications use ajax Round Robin to obtain server updates. However, the round-robin method increases the load on the server, and the data obtained by many requests is not updated. These requests are meaningless and only increase the load on the server. Using Comet techniques can solve the above problems to a certain extent. There are many implementations of Comet, most of which need to be im

Using Dwr's Comet (push) for a simple no-refresh multiplayer chat room, comet is a long-connected one. Usually we want to implement no refresh, and generally use Ajax. Ajax applications can solve this problem in two basic ways: one is to poll the server for updates every few seconds, and the server always opens a connection to the browser and sends it to the browser when the data is available. The first met

Original:A million-user Comet application with Mochiweb, part 1Reference: comet--"Server Push" technology that is based on HTTP long connections and does not need to install plugins in the browser is "Comet"mochiweb--building an Erlang library of lightweight HTTP serversIn this series, I'll go over how I've discovered how mochiweb supports such a huge network con

large.Pull mode, the implementation of the trigger on the randomness is very large, and need to consider whether the number of synchronized data will bring great pressure on the network and storage.Comet and the relationship between the two modesComet in essence, is an HTTP request server and the server does not currently have data, such as the server has data or more than a certain time to return to the client. At this level, comet is a mix of pull

. Chat interfaceAfter successful login, the two tabs jump to the following interface: Double-click the line in the online friend to start the chat.LIGER_ZQL Chat Interface:　　Indifferent Chat Interface:　　The chat process is using comet push technology.3. User Registration Interface　　}Comet push technology in the projectClientAjax Long Pollingfunction Postsubmit (params, success) { $.post ("Comet_broadcast

Http://www.cnblogs.com/hanxianlong/archive/2010/04/27/1722018.htmlI have been diving for many years and I suddenly appear today. Haven't written a blog for a long time, not because do not want to write, but because there is no feeling, do not know where to write.The day before yesterday to see a blog "Step by step to create their own Webim", think comet this concept is very interesting, but bloggers use their own set of more complex framework, looks r

Have to say that Ajax is really a good thing, by its appearance so that the Web terminal technology continues to produce, comet belongs to such a technology, this technology is sometimes called reverse Ajax, sometimes called the server "push" technology, well, do not be intimidated by the shiny words, in fact, not so difficult.Let's take a look at the wiki's explanation:"Comet is a Web-enabled push technolo

The SERVLET3 specification presents an asynchronous request, which is definitely a huge historical advance. The respective application server vendors have launched their own asynchronous request implementations (or comet, or server push support, or long connections), such as NIO Connection protocol support in Tomcat6, Jetty's continuations programming architecture, SUN, IBM, Bea, needless to say, the commercial version of the server to

This article mainly introduces the JavaScript data push Comet technology in detail. If you are interested, you can refer to the JavaScript data PUSH Service mainly for online webapp push, we don't need to take the initiative to push data from the Server to the local place every time we send Ajax requests like the Server. History of Data push: 1. the HTTP protocol is simple round-robin, keeping a link unavailable, or sending requests to the backend th

Introduction to ASP. NET MVC Comet pushThe principle of comet push, implemented in ASP. NET MVC, is simple.Server-side: Receives the server sends the AJAX request, the server side does not return, but will hold, until has the thing to inform the client, only then returns this request.Client: Requests an asynchronous action, and sends another immediately when it receives a return.Disadvantage: An ASP. NET pr

determine whether JSONP requests fail. Although HTML5 has added a onerror event handler to the 3 CometComet is a technique by which servers push data to a page. Comet enables information to be pushed to the page in near real time, making it ideal for handling sporting scores and stock quotes.There are two ways to implement comet: long polling and streaming. Long polling is a replica of a traditional pollin

What is comet? 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. (from wiki) Comet is a server push technology based on HTTP persistent connections (from IBM developerworks ). What is multipart XMLHttpRequest? It is a method for bundling multiple

version of the ActiveX object6 return NewActiveXObject (' msxml2.xmlhttp.6.0 ')7 8}Catch(E1) {9 Ten Try { One A //otherwise go back to the old version - return NewActiveXObject (' msxml2.xmlhttp.3.0 ') - the}Catch(E2) { - - //Error - Throw NewError (' XMLHttpRequest is not supported ') + } - } + } A}6. CORS(cross-origin Resource sharing cross-domain resource sharing) is a n

a Comet WEB application with simplicity and efficiency. Why use Comet? The main disadvantage of polling methods is that when extended to more clients, a large amount of traffic is generated. Each client must regularly access the server to check for updates, which adds more load to the server's resources. The worst scenario is to use polling for applications that do not frequently update, such as an Ajax

First, IntroductionThe principle of comet push, implemented in ASP. NET MVC, is simple.Server-side: Receives the server sends the AJAX request, the server side does not return, but will hold, until has the thing to inform the client, only then returns this request.Client: Requests an asynchronous action, and sends another immediately when it receives a return.Disadvantage: An ASP. NET processing thread will be occupied for a long time. But compared to

In a comet function, the second request is a request to obtain information, and the program keeps blocking the Code: then the third request triggers the condition in html and then initiates a request. The third request will be executed only after the second request is executed. Why? Php... In a comet function, the second request is a request to obtain information, and the program has been congested.Code:Th

First, Introduction The principle of comet push, implemented in ASP. NET MVC, is simple.Server-side: Receives the server sends the AJAX request, the server side does not return, but will hold, until has the thing to inform the client, only then returns this request.Client: Requests an asynchronous action, and sends another immediately when it receives a return.Disadvantage: An ASP. NET processing thread will be occupied for a long time. But compared t

This tutorial mainly uses Photoshop to create a simple comet effect, which can also be called a meteor effect. it mainly uses smoke materials and layer styles to complete the final process, next let's take a look at it. this tutorial mainly uses Photoshop to create a simple comet effect, which can also be called a meteor effect. it mainly uses smoke materials and layer styles to complete the final process,

"Return false} // The browser sends the notification named msgtoserver.'Msgtoserver' namespace: 'browser ', browser: True, filter: {println "msgtoserver filter"; return true}} ### In the above Code##### 'Msgtoserver' message label and message name##### Namespace message group, group name##### Whether the Browser allows the browser to accept the message. The grails-platform-core plug-in is mainly used for pushing events on the server. Events push integrates it with atmosphere, so we have this par

First, IntroductionThe principle of comet push, implemented in ASP. NET MVC, is simple.Server-side: Receives the server sends the AJAX request, the server side does not return, but will hold, until has the thing to inform the client, only then returns this request.Client: Requests an asynchronous action, and sends another immediately when it receives a return.Disadvantage: An ASP. NET processing thread will be occupied for a long time. But compared to