.htaccess remove duplicate part of a URL

问题

some bug in my online catalog SEF URL generation created a situation where some category slug is added to the URL twice. to fix this i would like to use .htaccess to remove the this part of the URL and have the whole URL shift up one level including URL's which also include a product under them.

the duplicate occurrence is of the sub-category painting-tools under the category tools

so the wrong URL looks like this: /store/items/catalog/tools/painting-tools/painting-tools or /store/items/catalog/tools/painting-tools/painting-tools/{some product}

instead of being the correct URL like this:

 /store/items/catalog/tools/painting-tools

or /store/items/catalog/tools/painting-tools/{some product}

and the URLs

  /store/items/catalog/tools/painting-tools/

or /store/items/catalog/tools/painting-tools/{some product}

should actually be like this

  /store/items/catalog/tools

or /store/items/catalog/tools/{some product}

tried using this rule, but its not working

RewriteRule ^/painting-tools/painting-tools/(.*) /painting-tools/$1 [QSA]

i think the ^ part is not correct since its not the beginning of the URL. How can i fix it ? thanks

回答1:

You can use this back-reference based redirect rule as very first rule in your .htaccess:

RewriteRule ^(.+?/([^/]+))/\2(/.*)?$ $1/$3 [NE,L,R=302]

RewriteRule ^(.+?/tools)/painting-tools(?:/.*)?$ $1/ [L,NC,R=302]

It is capturing repeat value after initial part and grouping it in this sub-pattern ([^/]+). Later in the regex it is using back-reference \2 to make sure same captured value is repeated.

Make sure you have proper RewriteBase defined to either / or /store/ wherever your htaccess is located.

---

Update: As per discussion below:

RewriteRule ^(.+?/tools)/painting-tools2(/.*)?$ $1$2 [L,NC,R=302]

This will remove /painting-tools2 from URLs.

来源：https://stackoverflow.com/questions/32456587/htaccess-remove-duplicate-part-of-a-url