如何缓存一个HTTP POST响应？ [英] How to cache an HTTP POST response?

问题描述

我想创建一个POST请求的缓存HTTP响应。

I would like to create a cacheable HTTP response for a POST request.

我的实际执行的响应为POST请求如下：

My actual implementation responses the following for the POST request:

HTTP/1.1 201 Created
Expires: Sat, 03 Oct 2020 15:33:00 GMT
Cache-Control: private,max-age=315360000,no-transform
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Content-Length: 9
ETag: 2120507660800737950
Last-Modified: Wed, 06 Oct 2010 15:33:00 GMT

.........

但它看起来像（火狐测试Safari浏览器，）浏览器不cacheing响应。

But it looks like that the browsers (Safari, Firefox tested) are not cacheing the response.

在 HTTP RFC 的相应部分说：

该方法的响应不能缓存，除非响应包括适当的Cache-Control或Expires头字段。然而，303（见其他）响应可以用来指示用户代理来检索缓存资源。

Responses to this method are not cacheable, unless the response includes appropriate Cache-Control or Expires header fields. However, the 303 (See Other) response can be used to direct the user agent to retrieve a cacheable resource.

所以，我认为它应该被缓存。我知道我可以设置一个会话变量并设置cookie，并做303重定向，但我想缓存POST请求的响应。

So I think it should be cached. I know I could set a session variable and set a cookie and do a 303 redirect, but I want to cache the response of the POST request.

有没有办法做到这一点？

Is there any way to do this?

P.S：我已经开始与一个简单的 200 OK ，所以这是行不通的。

P.S.: I've started with a simple 200 OK, so it does not work.

谢谢，

推荐答案

我也注意到，缓存始终是可选的（这是在HTTP / 1.1 RFC可以）。因为在大多数情况下，一个成功的POST的的失效的缓存条目，这可能仅仅是浏览器缓存你看就是不实现缓存POST响应（因为这将是$ P $的情况下ptty少见 - 这通常是通过格式化的东西作为一个GET，它听起来像你这样做）完成

I'd also note that caching is always optional (it's a MAY in the HTTP/1.1 RFC). Since under most circumstances, a successful POST invalidates a cache entry, it's probably simply the case that the browser caches you're looking at just don't implement caching POST responses (since this would be pretty uncommon--usually this is accomplished by formatting things as a GET, which it sounds like you've done).

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