在没有获得超时的情况下，在响应浏览器之前我可以等待多长时间？

编程入门行业动态更新时间:2024-10-26 14:31:59

本文介绍了在没有获得超时的情况下，在响应浏览器之前我可以等待多长时间？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我正在创建一个与长轮询一起使用的聊天应用程序，以模拟从服务器到客户端的推送。

I'm making a chat application that works with long-polling to emulate a "push" from server to client.

基本上，浏览器要求更新，我回答是否有新的东西。否则，我保持连接打开而不响应，直到有东西要发回。

Basically, the browser asks for updates, and I reply if there's something new. Otherwise, I keep the connection open without responding until there is something to send back.

现在，如果30秒过去了，我还没有发送任何东西，那么我做发送回复，基本上说NoNews，客户端将再次进行投票。

Now, if 30 seconds have passed and I haven't sent anything, then I do send a response, saying basically "NoNews", and the client will poll again.

我想要做的是显然保持这种连接，而不是尽可能长时间地回复，在浏览器简单地超时并放弃我之前... 我没有找到关于每个浏览器的客户端超时情况的良好文档，并且看起来它们对所有浏览器都不一样...

What I want to do is obviously keep this connection without replying for as long as possible, before the browser will simply time out and give up on me... I haven't found good documentation on what the Client Timeout is for each browser, and it doesn't seem like it's the same for all of them...

你们有没有做过长轮询申请？任何想法最长的安全超时可能是什么？

Has any of you made a long-polling application? Any ideas what the longest safe timeout might be?

谢谢！

推荐答案

浏览器应检测到超时XHR并发出另一个请求。

The browser should detect a timeout on an XHR and make another request.

更新：

检测XHR上的超时实际上很复杂，因为它不是由于某种原因内置。当然，您还需要处理502/503响应等。

Detecting timeouts on an XHR is actually complicated, since it's not built-in for some reason. Of course you will also need to handle 502/503 responses, etc..