Apache httpd:根据其他* response *标头有条件地设置响应标头 [英] Apache httpd: Conditionally set response header based on other *response* header

问题描述

有一种方法可以有条件地设置新的响应标头，而该条件使用另一个响应标头吗?具体来说，只有在响应具有特定的Content-Type时，才应设置新的响应标头.

Is there a way to set a new response header conditionally, where the condition uses another response header? Specifically, the new response header should be set only if the response has a certain Content-Type.

我与 mod_headers "http://httpd.apache.org/docs/2.2/mod/mod_setenvif.html" rel ="noreferrer"> mod_setenvif ，但看起来条件只能使用 request 标头，不是响应头.

I have looked into mod_headers in combination with mod_setenvif but it looks like conditions can only use request headers, not response headers.

谢谢约翰

推荐答案

Apache 2.4是答案:

Apache 2.4 is the answer:

当响应内容类型为application/pdf时设置Cache-Control标头

Set Cache-Control header when response content type is application/pdf

Header set Cache-Control "no-store,no-transform" "expr=%{resp:Content-Type} =~ m|application/pdf|"

请勿尝试使用IF指令.在过程中过早评估它.例如，以下操作将无效:

Do NOT try with the IF directive. It is evaluated too early in the process. For example, the following will NOT work:

<If "%{resp:Content-Type} =~ m|application/pdf|"> Header set Cache-Control "no-store, no-transform" </If>

<If "%{resp:Content-Type} =~ m|application/pdf|"> Header set Cache-Control "no-store, no-transform" </If>

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