可选的尾部斜杠mod_rewrite

Question

I have a very specific problem. The title gives a lot of other questions that have correct answers, however I don't know how to fit this to my own rewrite rules.

My .htaccess looks like so:

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^[^/]*/?$ index.php [NC,L]
RewriteCond %{REQUEST_URI} !(^/dev/zeroyear/$)
RewriteRule ^dev/zeroyear/([^/]+)/?([^/]*)/?([^/]*)/?([^/]*)/?$ /dev/zeroyear/index.php?var1=$1&var2=$2&var3=$3&var4=$4 [L,QSA]

I want the following 2 URLs to redirect to the same page:

http://timesheep.name/dev/zeroyear/news
http://timesheep.name/dev/zeroyear/news/

The last rewrite rule is causing a 500 because of the question mark I put, but the logs say nothing. If I change it to this:

RewriteRule ^dev/zeroyear/([^/]+)/([^/]*)/?([^/]*)/?([^/]*)/?$ /dev/zeroyear/index.php?var1=$1&var2=$2&var3=$3&var4=$4 [L,QSA]

The error goes away, but http://timesheep.name/dev/zeroyear/news will return a 404.

What can I do about this?

Answer 1

You've got a mix of non-greedy matches (which will eat up optional / 's) and optional / 's all mixed together. Try separating them into distinct matches:

RewriteCond %{REQUEST_URI} !(^/dev/zeroyear/$)
RewriteRule ^dev/zeroyear/([^/]+)/([^/]+)/([^/]+)/([^/]+?)/?$ /dev/zeroyear/index.php?var1=$1&var2=$2&var3=$3&var4=$4 [L,QSA]

RewriteCond %{REQUEST_URI} !(^/dev/zeroyear/$)
RewriteRule ^dev/zeroyear/([^/]+)/([^/]+)/([^/]+?)/?$ /dev/zeroyear/index.php?var1=$1&var2=$2&var3=$3 [L,QSA]

RewriteCond %{REQUEST_URI} !(^/dev/zeroyear/$)
RewriteRule ^dev/zeroyear/([^/]+)/([^/]+?)/?$ /dev/zeroyear/index.php?var1=$1&var2=$2 [L,QSA]

RewriteCond %{REQUEST_URI} !(^/dev/zeroyear/$)
RewriteRule ^dev/zeroyear/([^/]+?)/?$ /dev/zeroyear/index.php?var1=$1 [L,QSA]