清漆:如果响应为404,则重写URL [英] Varnish: Rewrite a URL if response is 404
问题描述
我很好奇,如果在Varnish 2.1.5中,如果响应为404,是否可以重写URL?
I'm curious if there is a way rewrite a URL if response is a 404, in Varnish 2.1.5?
例如.我想提取一个URL,该URL可能存在也可能不存在.如果URL不存在,我想重写URL,然后尝试新的URL.
For example. I'd like to pull up a URL, which may or may not exist. If the URL doesn't exist, I'd like to do a URL rewrite and try the new URL instead.
我是Varnish的新手,并不完全了解请求的生命周期(如果有人认识这篇文章的人,请分享).
I'm new to Varnish and don't completely understand the lifecycle of a request (if anyone knows a guy of article explaining this, please share).
我尝试设置一些变量和请求标头,并检查res.status
,但它们似乎在生命周期和页面404s的任何地方都丢失了:
I've tried setting some variables and request headers, and checking res.status
but they seem to get lost someplace in the lifecycle and the page 404s anyways:
if (req.http.cookie ~ "lang_pref"
&& resp.status == 404
&& req.url ~ "^\/(en|fr|de)(\/.*)?$"
) {
set resp.http.Location = "https://" req.http.host regsub(req.url, "^\/(en|fr|de)\/","/");
}
该用例适用于翻译后的网站.例子
The use case is for a translated site. Example
Website.com/french/page可能存在或不存在 如果/French/page回应为404 然后尝试/page代替 如果/page不存在 然后是404
Website.com/french/page may or may not exist If /French/page responds with a 404 Then try /page instead If /page doesn't exist Then 404
推荐答案
我正在将其作为答案,否则它将显得很愚蠢. 请记住,永久移动了301,而临时移动了302.
I am writing this as an answer or it will look goofy as a comment. Keep in mind that 301 is permanently moved and 302 is temporarily moved.
您还可以像在帖子中一样调整使用正则表达式.
You can also adjust to use regex as you did in your post.
sub vcl_recv {
if (req.url ~ "^/old/page") {
return (synth(301, "/new/page"));
}
if (req.url ~ "^/this/oldPage") {
return (synth(302, "/this/newPage"));
}
}
sub vcl_synth {
if (resp.status == 301 || resp.status == 302) {
set resp.http.location = resp.reason;
set resp.reason = "Moved";
return (deliver);
}
}
更新:解决评论.
sub vcl_error {
if (obj.status == 404) {
set obj.status = 301;
set obj.http.Location = obj.response;
return (deliver);
这篇关于清漆:如果响应为404,则重写URL的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!