[imapfilter-devel] Regex matching; trailing CR?

[William Faulk]

I've been arguing with getting imapfilter to work against my Exchange 
IMAP server for a couple of days now, and I finally figured out what was 
going wrong.  When I call match_subject (for example), the string that's 
passed to the regular expression ends in a carriage return (\r, \015), 
and that makes my regexes that end in '$' fail.

Should imapfilter be passing that CR to the regex engine?  If so, what's 
the best way to deal with it?  The only thing I've found that works is 
'\015' immediately before the '$', but I don't know that it will always 
be there, and if I follow it with a '?', it fails.  I also don't see how 
to mark my regex as a multiline regex.

FWIW, here is the code in my config.lua that shows me the CR:

> result = cortina.INBOX:match_subject('^Subject:\\s*Backup.*\\s[01]')
> headers = cortina.INBOX:fetch_fields({'subject'},result)
> for i,line in pairs(headers) do
>   print(line)
>   reres, cap = regex_search('^Subject:\\s*Backup.*\\s[01](.*)$', line)
>   if reres then
>     print 'match'
>     print('"' .. cap .. '"')
>     for j=1,string.len(cap) do
>       print(string.byte(cap,j))
>     end
>   else
>     print 'nomatch'
>   end
> end

And here's a segment of the output:

> Subject: Backup on hzsbak0100 - 0
>
> match
> "
> 13

(As a side note, I think the fact that the trailing quotation mark in 
the raw print of the regex capture is bizarre.)

-Bitt Faulk