Comet聊天应该选择什么方式的客户端？
我将实现一个 Comet 聊天。 对服务器端做出选择很容易，但对客户端来说——我真的很困惑：长轮询、回调轮询、隐藏 iframe、http 流、持久 http 连接......
我不太了解概念，谁能帮我说得更清楚？ 我只是想选择最好的方式来实现一个Comet聊天客户端~
I am going to implement a Comet chat. It is easy to make a choice for the server side but for the client side--I am really confused: long polling, callback polling, hidden iframe, http streaming, persistent http connection....
I don't know much about the conceptions, and who can help me to make it more clear? I just want to choose the best way to implement a Comet chat client~
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一旦选择了服务器端组件，您就会知道要使用哪个客户端组件。
例如，如果您使用 WebSync（适用于 ASP.NET/IIS），您将使用以下实现Bayeux 协议作为客户端 - 根据您的需要，可以是内置协议，也可以是其他可用实现之一（dojo、jquery 等）。
如果您使用 StreamHub 之类的东西，他们也会有一个可用于其软件包的客户端。
您提到的各种项目 - 长轮询、回调轮询等 - 将在各种实现中隐藏起来。 在 WebSync 中，我们支持长轮询和回调轮询，但在使用客户端时您不需要了解任何相关信息，因为它会根据所使用的浏览器来处理这些问题。
Once you have selected a server side component, you'll know what client-side component to use.
For example, if you use WebSync (for ASP.NET/IIS) you'll use an implementation of the Bayeux protocol as a client - either the built in one, or one of the other available implementations (dojo, jquery, etc) according to what your needs are.
If you use something like StreamHub, they'll have a client available for their package as well.
The various items you mentioned - long polling, callback polling, etc - are going to be hidden away from you in the various implementations. In WebSync, we've got support for long-polling and callback-polling, but you don't need to know anything about that when using the client, as it'll take care of that according to the browser being used.
我认为长轮询是大多数商业服务似乎使用的技术。 这是唯一适用于所有浏览器的选项。
I think long polling is the technique that most of the commercial services seem to use. It's the only option that works in every browser.
我认为该技术并不重要，只要它适用于所有浏览器即可。 StreamHub Comet 服务器现在有一个免费的社区版本 - 它可以跨浏览器工作，因此您不必担心实施不同的技术，例如长轮询。 当有人已经为您完成所有工作时，为什么还要做所有工作...我建议阅读教程：使用 StreamHub 构建 Comet 聊天应用程序。
I don't think the technique matters as long as it works in all browsers. StreamHub Comet server now have a free community edition - it works cross-browser, so you don't have to worry about implementing different techniques such as long-polling. Why do all the work when someone's already done it for you... I recommend reading the tutorial: Building a Comet chat application with StreamHub.