Using RewriteMap Lookups in a RewriteCond . Possible?

Question

I am trying the following

RewriteMap lookup "txt:D:/lookup.txt"
RewriteCond %{REQUEST_URI} ^/${lookup}
RewriteRule ^/(.*)/(.*)$ /a/$1/b/$2.html [PT,L]

I am trying to compare if the request path is starting with the valid paths or not.

I have a long list of paths in the lookup file.

Please help on this.

Maybe you shoud specify the `LookupKey` : `RewriteCond %{REQUEST_URI} ^/${lookup:$1}` — krisFR, May 18 '15 at 16:49
Can you provide a sample (few lines) of your `lookup.txt` file ? — krisFR, May 19 '15 at 02:26
Could you explain more what is the result you expect ? I mean, typing `http://domain.com/abc` what is the rewrite you want ? — krisFR, May 19 '15 at 03:00
If the URL starts with http://domain.com/abc/... , apply the rewrite rule for [PT]. — serverliving.com, May 19 '15 at 03:03
Last comment before entering chat : i know, this was not my question. My question is : what is the target URL you expect ? (e.g : `http://domain.com/a/abc/b/abc.html`) — krisFR, May 19 '15 at 03:06
Did you find any solution for it?. I tried many methods with no luck — serverliving.com, May 19 '15 at 09:45

krisFR · Answer 1 · 2015-05-21T02:06:15.017

I've discovered that you cannot have a variable in the RewriteCond regex, because it seems it is only compiled once, but not per-request.

You could workaround this by putting both ${lookup} and %{REQUEST_URI} in a test string using a separator (let's say a comma) and then make sure they are equal, e.g :

RewriteCond %{REQUEST_URI},/${lookup:/$1/}/$2 ^([^,]+),\1

Also note that, for this given sample URL http://mydomain.dom/abc/mypage.html :

%{REQUEST_URI} = /abc/mypage.html

but

${lookup:$1} = abc

So %{REQUEST_URI} will never be equal to ${lookup:$1}.

To make them equal when requested, you have to :

enclose ${lookup:$1} with / to get /abc/ = /${lookup:$1}/
add $2 to also get the requested file : /abc/mypage.html = /${lookup:$1}/$2
As your key is /abc/ (and not abc) you need to enclode $1 with / to match the key : /${lookup:/$1/}/

So finally you will have this :

RewriteMap lookup "txt:/var/www/lookup.txt"
RewriteCond %{REQUEST_URI},/${lookup:/$1/}/$2 ^([^,]+),\1
RewriteRule ^/(.*)/(.*)$ /a/$1/b/$2 [R=301]

Going to http://mydomain.dom/abc/mypage.html gives me the following log :

(1) pass through /a/abc/b/mypage.html

Using RewriteMap Lookups in a RewriteCond . Possible?

1 Answers1