* On 18 Nov 2012, Jamie Paul Griffin wrote:
> Hi David, et al
>
> I wondered if you would mind showing me how I could use your python
> code above to implement it into Gary's idea for creating the mail
> Expiry date macro?
>
> I am a total python beginner and so can't quite make sense of what i
> need to do to achieve what i need.
This is a quick hack and untested beyond the basics, but feel free to
work from it. It is, or should be, a complete reimplementation of
Gary's script in Python.
#!/usr/bin/env python
import os
import sys
import time
try:
from parsedatetime.parsedatetime import Calendar
except ImportError:
p = os.path.basename(sys.argv[0])
print >>sys.stderr, '%s: please install the parsedatetime module' % p
sys.exit(255)
def fmtdate(spec):
'''Generate an rfc822 (GMT) time strong for a spec provided in
the arguments.
parsedatetime doesn't know anything about timezones, so the
mktime and gmtime are just to adapt the struct_time value from
c.parse() from local time to GMT, so that the RFC822 address
can assume it. This lets the script work for anyone, without
needing to calculate a zone offset for your locale.
'''
rfc822gmt = '%a, %d %b %Y %H:%M:%S -0000'
c = Calendar()
st, flag = c.parse(spec)
t = time.mktime(st)
tm = time.gmtime(t)
return time.strftime(rfc822gmt, tm)
def main(args):
defaultdate = 'today + 20 days'
sys.stdout.write('Expiry date ["%s", "never" to remove]: ' %
defaultdate)
response = sys.stdin.readline()
if response == '':
# eof, ctrl-D
return 10
spec = response.strip()
if spec == '':
# use default
spec = defaultdate
if spec.lower() == 'never':
# remove header
cmd = 'formail -i "Expires:"'
else:
date = fmtdate(spec)
cmd = 'formail -i "Expires: %s"' % date
if len(args):
# if filename given, read from filename
fp = open(args[0], 'r')
data = fp.read()
else:
# else stdin
data = sys.stdin.read()
# write all data to pipe, read results back
cin, cout = os.popen2(cmd)
cin.write(data)
cin.close()
data = cout.read()
cout.close()
if len(args):
# if filename given, read from filename
fp = open(args[0], 'w')
fp.write(data)
fp.close()
else:
# write to stdout
sys.stdout.write(data)
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
--
David Champion • d...@bikeshed.us
