mod_rewrite/1579: Some length patterns fail with "$", ".*", "[]"

[William Stapleton <wl...@uwm.edu>]

>Number:         1579
>Category:       mod_rewrite
>Synopsis:       Some length patterns fail with "$", ".*", "[]"
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Fri Dec 19 15:30:00 PST 1997
>Last-Modified:
>Originator:     wls@uwm.edu
>Organization:
apache
>Release:        1.3b3
>Environment:
Digital Unix on alpha, OSF1 ratbert.imt.uwm.edu V3.2 62 alpha, gcc 2.7.0
>Description:
I have an NCSA-imagemap conversion pattern that works fine on 1.2.4:

RewriteRule ^/cgi-bin/imagemap/(.*\.[mM][aA][pP])$ /$1

However, this doesn't match under 1.3b3, but does match if I remove the "$":

RewriteRule ^/cgi-bin/imagemap/(.*\.[mM][aA][pP]) /$1

Experimentation with various patterns seems to indicate this has
something to do with the number of characters.  These also fail:

RewriteRule ^/ccccccc/iiiiiiii/(.*\.[mM][aA][pP])$ /x
RewriteRule ^/ccccccc/iiiiiiiii/(.*\.[mM][aA][pP])$ /x

But work with the "$" removed.  This works WITH "$":

RewriteRule ^/ccccccc/iiiiiii/(.*\.[mM][aA][pP])$ /x

By fail, I mean that the rewrite log indicates the pattern didn't match.  E. g.:

40023860][rid#14003e910/initial] (3) applying pattern '^/ccccccc/iiiiiiii/(.*\.[
mM][aA][pP])$' to uri '/ccccccc/iiiiiiii/blah.map'
toocold4rats.csd.uwm.edu - - [19/Dec/1997:16:58:24 -0600] [ego.csd.uwm.edu/sid#1
40023860][rid#14003e910/initial] (1) pass through /ccccccc/iiiiiiii/blah.map

I think all of my failures used the ".*" and "[]" matches.  One thinks maybe
they're accidentally adding characters to the end of a buffer?
>How-To-Repeat:
Try above rewrite patterns, check rewrite.log to see if they match properly,
or rewrite to obvious URLs...
>Fix:
No.  I didn't look at the code, and I'm tired of futzing with my server today..
>Audit-Trail:
>Unformatted:
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