Question

我想创建一个允许多个用户在一个页面上一起工作的网页，想象一下，一个基于网络的编辑器，允许用户更改文档，作为这类功能的一个例子。

更有经验的程序员会如何实现这一点，因为我似乎真的无法制定任何方法来开始执行这项任务。有没有任何编程库可以让实现这个功能变得更容易，或者它太复杂了，甚至想都不敢想？

如果有帮助的话，我主要使用GWT和SmartGWT创建这个Web应用程序。

感谢您的任何意见。

Answer 1

gwt确实有一个类似cometd的库-http://code.google.com/p/gwteventservice/

Wiki: In web development, Comet is a neologism to describe 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. Comet is an umbrella term for 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.

In practice: In normal way client can receive resources by request->responce. It is no possible to send data directly to client without request. With comet you can hold realtime connection between client and server and exchange data in realtime.

查看：docs.google.com。他们正在使用彗星。

Answer 2

Etherpad.com是一项曾经这样做的服务。自那以后，它被谷歌收购，代码以开源形式发布。您可以在etherpad.com页面获取源下载和相关信息。

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