在 Apache Htaccess 中正确使用 KeepAlive [英] Proper use of KeepAlive in Apache Htaccess

问题描述

有什么区别:

Header set Connection keep-alive

和

KeepAlive on

在 Apache htaccess 中?

in Apache htaccess?

我们必须在 php 文件的标题中放入哪些代码和选项?htaccess 文件里有什么?

What code and options we have to put in the header of a php file? And what in htaccess file?

推荐答案

如果你只是设置标题 Connection: keep-alive 是不够的.客户端会认为这是一个保持活动连接，但服务器可能会决定关闭连接.此外，客户端不知道通过保活连接可以处理多少个请求.还有一个额外的标头用于跟踪通过保持活动连接发送的请求，如下所示:

If you simply set the header Connection: keep-alive it isn't going to be enough. The client will think it's a keep-alive connection but the server may decide to close the connection. Additionally, the client doesn't know how many requests can be served through the keep-alive connection. There's an additional header that is used to track requests sent through a keep-alive connection that looks like this:

Keep-Alive: timeout=15, max=100

它告诉客户端它可以在当前保持连接上发送最多 100 个请求(并且它会随着您继续使用所述保持连接连接而倒计时)，并且客户端有 15 秒的时间进行任何附加操作在连接关闭之前请求.

which tells the client that it can send up to 100 more requests on the current keep-alive connection (and it counts down as you continue to use said keep-alive connection) and that the client has 15 seconds to make any additioanl requests before the connection is closed.

仅使用标头不足以建立保持活动连接，因为服务器需要对其进行协商.两端都需要知道keep-alive，并且两端都需要做适当的核算.您需要告诉 apache 在其结束时处理 keep-alive，而简单地发送标头不会这样做.您需要使用第二个指令打开 keep-alive:

Simply using the header isn't sufficient to establish a keep alive connection because the server needs to negotiate it. Both ends need to know about the keep-alive and both ends need to do proper accounting. You need to tell apache to handle keep-alive on its end and simply sending the header isn't going to do that. You need to turn keep-alive on using the second directive:

KeepAlive on

此外，您可以使用以下指令调整保活机制:

And additionally, you can tweak the keep-alive mechanism with directives like:

KeepAliveTimeout 15
MaxKeepAliveRequests 100

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