我的目标是将某些querystring属性及其值列入白名单,这样清漆就不会改变URL之间的缓存.
例：
Url 1: http://foo.com/someproduct.html?utm_code=google&type=hello Url 2: http://foo.com/someproduct.html?utm_code=yahoo&type=hello Url 3: http://foo.com/someproduct.html?utm_code=yahoo&type=goodbye
在上面的例子中,我想将“utm_code”列入白名单,而不是“类型”.所以在第一个url被命中之后,我希望清漆将缓存的内容提供给第二个URL.
但是,在第三个url的情况下,属性“type”值是不同的,因此应该是一个varnish cache miss.
我已经尝试了以下2种方法(发现在drupal帮助文章,我现在找不到)似乎不起作用.可能是因为我有正则表达式错误.
# 1. strip out certain querystring values so varnish does not vary cache. set req.url = regsuball(req.url,"([\?|&])utm_(campaign|content|medium|source|term)=[^&\s]*&?","\1"); # get rid of trailing & or ? set req.url = regsuball(req.url,"[\?|&]+$",""); # 2. strip out certain querystring values so varnish does not vary cache. set req.url = regsuball(req.url,"([\?|&])utm_campaign=[^&\s]*&?","\1"); set req.url = regsuball(req.url,"([\?|&])foo_bar=[^&\s]*&?","([\?|&])bar_baz=[^&\s]*&?","");
我想出来,想分享.我发现这个代码使一个子程序能够做到我所需要的.
sub vcl_recv {
# strip out certain querystring params that varnish should not vary cache by
call normalize_req_url;
# snip a bunch of other code
}
sub normalize_req_url {
# Strip out Google Analytics campaign variables. They are only needed
# by the javascript running on the page
# utm_source,utm_medium,utm_campaign,gclid,...
if(req.url ~ "(\?|&)(gclid|cx|ie|cof|siteurl|zanpid|origin|utm_[a-z]+|mr:[A-z]+)=") {
set req.url = regsuball(req.url,"(gclid|cx|ie|cof|siteurl|zanpid|origin|utm_[a-z]+|mr:[A-z]+)=[%.-_A-z0-9]+&?","");
}
set req.url = regsub(req.url,"(\?&?)$","");
}
