[PATCH] mod_redirect: Add support for url-encoding backreferences, map %%n->%n, $$n->$n

[will@…]

Attached is a simple user-contributed (e.g. no guarantees) patch to expand the capabilities of mod_redirect for lighttpd 1.4.8.

It adds two features:

* optional url-encoding for backreferences

* allow backreference character usage without substituting a backref.

Here is an example of the first case:

Let's say that you want to map the specified URL into a CGI argument, but you want it to be escaped properly --

 url.redirect = ( "^(.*)$" =>
                  "/view?path=$!1"

If a user requests "http://example.com/special/documents?foo=bar", they will be redirected to "http://example.com/view?path=%2Fspecial%2Fdocuments%3Ffoo%3Dbar".

Now let's say you want to include an absolute address so that the user is redirected to a different site, http://2.example.com. You would want the redirection to result in the following URL: "http://example.com/view?path=http%3A%2F%2F2.example.com%2Fspecial%2Fdocuments%3Ffoo%3Dbar".

The second change allows you to do this with mod_redirect:

 url.redirect = ( "^(.*)$" =>
                  "http%%3A%%2F%%2F2.example.com/view?path=$!1"

Using double percents, mod_redirect will no longer assume that the %3 in %%3A is a poor backreference and it will print out the desired single %.

--

Doh - it looks like I need to attach after I file the ticket. If I have a problem with it, I will put it on the wiki as an attachment.

[will@…]

mod_redirect url-encode and %%/$$ patch

[moo]

assign to me. applies to mod_rewrite too. anyone else have another character against the '!' ?

[moo]

patch pending

[moo]

cannot be done in 1.4.x unless [1094] is merged back to branches/1.4.x, need discussion for 1.5

[anonymous]

This site could really benefit from some, any, spam prevention.

[raja@…]

Fixed spam changes