尝试将没有查询字符串的任何请求重定向到我的域到子域

Question

Using .htaccess , I'm trying to find out how to redirect any requests to my site base URL / domain but to allow any requests with query strings, and if possible, only certain prepended query strings. For example:

• Request to / is redirected to blog.example.com/
• Request to /?anything (even without = ) will be served as usual

Bonus points if anyone can describe how all pages would be redirected unless only containing certain query strings.

Answer 1

You can use this rewrite rule:

RewriteEngine on
RewriteCond %{QUERY_STRING} ^$
RewriteRule ^\?$ https://blog.example.com/ [R=301,L]

• The condition with %{QUERY_STRING} ^$ ensures that the query string is empty (starts with symbol followed by ends with symbol.)
• The rule ensures that the path contains at most a single slash and causes the redirect.

If you want to redirect everything except a specific query string, you can use a very similar rule. This one will redirect any query string on the root path except /?foo=bar

RewriteEngine on
RewriteCond %{QUERY_STRING} !^foo=bar$
RewriteRule ^\?$ https://blog.example.com/ [R=301,L]

No matter how many rewrite rules you have, you only need one instance of RewriteEngine on in your .htaccess .