Using SCRIPT_NAME as path to trac.cgi leads to 'unprettied' links when using lighttpd

[Mark Rowe <edgewall.com@…>]

With lighttpd configured to rewrite /dev/ as /cgi-bin/trac.cgi, SCRIPT_NAME is set to /cgi-bin/trac.cgi. This differs from Apache where it would be set to the URL before it is rewritten — /dev/. This results in generated links being of the form /cgi-bin/trac.cgi/timeline/, which are less than perfect.

[Mark Rowe <edgewall.com@…>]

Patch that calculates the path to Trac based on REQUEST_URI, QUERY_STRING and PATH_INFO. When REQUEST_URI is not available (I believe this is the case for IIS on Windows), fall back to SCRIPT_NAME. Tested with Apache 2 and lighttpd.

[Christopher Lenz]

Arguable, this is a ​lighttpd problem. Also, REQUEST_URI isn't officially part of the [CGI specification ​http://www.faqs.org/rfcs/rfc3875.html].

[Mark Rowe]

I took this up with the lighttpd developer, and he said that their interpretation was valid according to the specification. A glance at the CGI spec shows that it is vague on the semantics of SCRIPT_NAME so that appears to be true. As you noted though, the only work-around requires relying on a non-standard variable.

I agree that it would be preferable to convince lighttpd to bring it's interpretation of SCRIPT_NAME into line with Apache's, but in the mean time don't see this patch causing any problems as it will fall back to the current behaviour if REQUEST_URI isn't available.

[Mark Rowe]

I have reached the conclusion that this is a lighttpd issue. Users wishing to use lighttpd with Trac should apply the attached patch, and ​contact the lighttpd developers to raise their awareness of this issue.