Question

我有以下重写规则：

   # Rewriting without query parameters to avoid cache overloading
    RewriteCond %{REQUEST_URI} /(en|fr)/search-results.html
    RewriteCond %{QUERY_STRING} ^.
    RewriteCond %{QUERY_STRING} !referrerPage=automotive-home
    RewriteRule ^(.*)/search-results.html$ $1/search-results.html? [NC]

据我了解

RewriteCond %{REQUEST_URI} /(en|fr)/search-results.html

如果{REQUEST_URL}愿意，

将返回true：

https://www.trololo.com/en/search-results.html

https://www.trololo.com/fr/search-results.html

请解释最后两个RewriteCond：

RewriteCond %{QUERY_STRING} ^.
RewriteCond %{QUERY_STRING} !referrerPage=automotive-home

RewriteCond %{QUERY_STRING} ^. 这是否意味着QUERY_STRING不是空白
%{QUERY_STRING} !referrerPage=automotive-home 这是否意味着QUERY_STRING不包含referrerPage=automotive-home？

Answer 1

正则表达式^.表示匹配任何一个字符 . The ^`本身表示字符串的开头，对于这样的通用表达式通常不需要;它本可以省略

.匹配任何一个字符 ...因此，在此上下文中，它表示查询字符串必须至少包含1个字符;如果查询字符串为空，则不满足条件。

# If the requested query string is *not empty, having at least one character*
RewriteCond %{QUERY_STRING} ^.

# ...and the query string does not contain "referrerPage=automotive-home"
# It doesn't need to be the complete expression because it is not anchored
# with ^ at the start and $ at the end, so this pattern will match
# if it appears anywhere in the query string
RewriteCond %{QUERY_STRING} !referrerPage=automotive-home

# If the above 2 conditions were met, the next `RewriteRule` will be processed.
# This rewrite rule's purpose is to erase the query string. Since it terminates in 
# ? without a [QSA] flag, any existing query string will be removed
RewriteRule ^(.*)/search-results.html$ $1/search-results.html? [NC]

在这种情况下，第一个RewriteCond只能在没有^

的情况下表达

RewriteCond %{QUERY_STRING} .

正如评论中所提到的，!否定了后续的表达。这个以及锚点和.字符记录在the mod_rewrite regex vocabulary.

中

最后，从Apache 2.4开始，有a [QSD] ("query string discard") flag与使用?结束目标URI以擦除查询字符串相同。

Answer 2

RewriteCond％{QUERY_STRING} ^。 ==＆GT;请求的查询字符串不为空，至少有一个字符
％{QUERY_STRING}！referrerPage = automotive-home ==＆gt;查询字符串不包含＆＃34; referrerPage = automotive-home＆＃34;

什么＆＃34; ^。＆＃34;和＆＃34;！＆＃34;在apache配置中意味着什么？

2 个答案: