image-filter generates relative links, which break many RSS readers

I'm not sure I understand this issue. If image-filter generates something like

<a href="A"><img src="B" /></a>

is the problem that A is relative or B is relative?

The image-filter module calls drupal's l() function to generate the hyperlink A with the default options, which generates relative paths. This could be changed, or made an option.

The image-filter module calls the file module's file_create_url() function to create the image link B. This either generates an absolute direct link, or a relative link that goes through drupal, depending on whether the "file system settings" "download method" is set to public or private on "Home > Administer > Settings".

I'm guessing is that the issue is URL A. I'm willing to change it to absolute; I didn't realize that it was an issue, so I just used a relative link because it was the default.

If you apply the following patch to image_filter.module, it will generate an absolute link instead of a relative link.

--- image_filter.module.orig    Thu Oct 27 17:09:40 2005
+++ image_filter.module Thu Oct 27 17:10:12 2005
@@ -202,7 +202,7 @@
     ($img->class ? " class=\"$img->class\"" : '') .
     ($img->style ? " style=\"$img->style\"" : '') . " />";
   return ($img->link
-          ? l($imgtag, $img->link, array(), NULL, NULL, FALSE, TRUE)
+          ? l($imgtag, $img->link, array(), NULL, NULL, TRUE, TRUE)
           : $imgtag);
 }

Please try it out and let me know if this solves your problem.

Patch applied in revision 1.19.