HTTP保持活动超时 [英] HTTP keep-alive timeout

问题描述

我可以指定 HTTP超时还是服务器强加一个值？
例如，如果我这样做：

Can I specify the HTTP timeout or does the server impose a value? For example, if I do:

telnet my.server.net 80
Trying X.X.X.X...
Connected to my.server.net.
Escape character is '^]'.
GET /homepage.html HTTP/1.0
Connection: keep-alive
Host: my.server.net

HTTP/1.1 200 OK
Date: Thu, 03 Oct 2013 09:05:28 GMT
Server: Apache
Last-Modified: Wed, 15 Sep 2010 14:45:31 GMT
ETag: "1af210b-7b-4904d6196d8c0"
Accept-Ranges: bytes
Content-Length: 123
Vary: Accept-Encoding
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: text/html
[...]

行：

The line:

Keep-Alive: timeout=15, max=100

...指定有100秒的最大超时，对吗？如何设置此值？

...specifies that there is a maximum timeout of 100 seconds, right? How can I set such value?

推荐答案

客户端无法指定超时值，它是确定最大超时值的服务器配置。额外的Keep-Alive头可以通知客户端服务器多长时间保持连接打开（timeout = N值）以及在服务器强制关闭之前可以通过同一连接执行多少次请求（max = M） 。

The client cannot specify the timeout, it is the server configuration that determines the maximum timeout value. The extra Keep-Alive header can inform the client how long the server is willing to keep the connection open (timeout=N value) and how many requests you can do over the same connection (max=M) before the server will force a close of the connection.

另请参阅在Apache Htaccess中正确使用KeepAlive

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