为什么浏览器不缓存一个AJAX请求中的301? [英] Why does the browser not cache a 301 within an AJAX-request?
问题描述
这是XMLHtt prequest:
This is the XMLHttpRequest:
$.ajax({
method: "get",
url: "getPage.php",
data: $data,
dataType: 'json',
timeout: 2000,
success: function(result) {
handleContent(result);
}
});
这是getPage.php?数据=数据
This is getPage.php?data=data
header("Expires: " . gmdate("D, d M Y H:i:s", time() + $offset) . " GMT");
header("Cache-Control: max-age=" . $offset . ", public");
header("HTTP/1.1 301 Moved Permanently");
header("Location: $location);
这是$位置:
header("Expires: " . gmdate("D, d M Y H:i:s", time() + $offset) . " GMT");
header("Cache-Control: max-age=" . $offset . ", public");
print $print;
客户端浏览器缓存正确位置$。然而,它并不缓存重定向getPage.php?数据=数据
The client browser properly caches $location. However it does not cache the redirect in getPage.php?data=data
每次AJAX请求被称为它请求一个GET getPage.php?数据=数据。
Every time the ajax-request is called it requests a GET getPage.php?data=data.
我想它会自动获得$位置,而不是(或者说尝试获得$位置,并获得缓存页)。
I would like it to automatically GET $location instead (or rather try GET $location and get the page from cache).
这是不是301永久重定向是?创建它是由浏览器缓存重定向(加上一些代理,当然,搜索引擎等东西)?
Is this not what 301 Permanent Redirect is for? Creating a redirect which is cached by the browser (plus some proxy, search engine etc. stuff of course)?
请不要质疑我为什么选择做这种方式。我有原因的,我我不打算在这里赘述了。我想要的是一个答案,可能的解决方案,它可以让导致没有GET请求第一个请求后在所有的301重定向获取缓存。
Please do not question why I choose to do it this way. I have reasons for this which I am not going to go into here. All I want is an answer and possibly a solution which lets the 301 redirect get cached resulting in no GET requests at all after a first request.
在此先感谢!
推荐答案
修改:大多数浏览器现在(2013年11月)做缓存重定向,看到的 Browserscope (以下简称高速缓存重定向测试),但他们并没有在当时有人问
Edit: most browsers now (November 2013) do cache redirects, see Browserscope (the "Cache Redirects" test), but they didn't at the time the question was asked.
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