Re: How to split on content-length?

[Ted Zlatanov <tzz@lifelogs.com>]

On Wed, 24 Sep 2003, tkoelman@xs4all.nl wrote:

> I don't think this will match anything for wich the last 5 digits
> are a number between 00000 and 39999. But you gave me an idea and I
> modified it to
> 
> \\(1[4-9]\\|[2-9][0-9]\\)[0-9]\\{4,\\}
> 
> which still has a problem with numbers containing more than 6 digits
> of which the first is a 1 and the second smaller than 4. Adding
> another bit like so
> 
> \\(1[4-9]\\|[2-9][0-9]\\|[1-9][0-9][0-9]\\)[0-9]\\{4,\\}
> 
> does the trick.

That seems unnecessarily acrobatic.  Why not just match the digits and
compare them numerically to the number you want?  You can use
string-to-number, something like this might work (set data to the
header of interest and the action to what you want instead of the
message):

(let ((data "19874543435")
      (limit 150000))
  (when (and (string-match "\\([0-9]+\\)" data)
	     (> (string-to-number (match-string 1 data)) limit))
    (message "saw number greater than %d" limit)))

I would be very careful about using content-length for filtering.
Maybe you should consider doing that only if the message has an
executable attachment.

Ted