Online Office at my work likes to modify urls of raw text.. This script reverses the process.

no-proofpoint

#!/usr/bin/env python3
# Usage:
# no-proofpoint < broken_file.txt > fixed_file.txt

import re, sys
proofpoint_re = re.compile(r'https?://.+?/url\?u=(.+?)&d=.+?&e=')
encode_re = re.compile(r'-(\w{2})')
stdin = sys.stdin.read()
prev = 0
for match in proofpoint_re.finditer(stdin):
  sys.stdout.write(stdin[prev:match.start()])
  url = match.group(1).replace('_', '/')
  url_prev = 0
  for m in encode_re.finditer(url):
    sys.stdout.write(url[url_prev:m.start()])
    sys.stdout.write(chr(int(m.group(1), base=16)))
    url_prev = m.end()
  sys.stdout.write(url[url_prev:])
  prev = match.end()
sys.stdout.write(stdin[prev:])