#!/usr/bin/python
# This script is intended to be used by Apache's RewriteMap directive to
# properly convert URLs with Greek characters. Specifically, Greek characters
# in Unicode (such as those sent by Internet Explorer in its default setup) are
# converted to iso-8859-7; all other characters are left as they are.
# NOTE: This script must not hang or unexpectedly terminate, or the web server
# will hang or malfunction.

import sys

def to_unicode(str, enc):
    "Changes str from enc to unicode; returns empty string on error"
    try:
        str = unicode(str, enc)
        return str
    except:
        return ""

while 1:
    line = sys.stdin.readline()
    if not line: break
    nline = to_unicode(line, 'utf-8')
    if nline == "": nline = to_unicode(line, 'iso-8859-7')
    if nline == "": nline = line
    try:
        nline = nline.encode('iso-8859-7')
        sys.stdout.write(nline)
    except:
        sys.stdout.write(line)
    sys.stdout.flush()