Decode RFC2047 (formerly RFC1342) encoded mail headers - requires Python 3.3 or later

rfc2047-decode.py

#! /usr/bin/env python3
# Decode RFC2047 (formerly RFC1342) encoded mail headers
# Requires >= python 3.3
import sys
from email.header import decode_header


def recode_utf8(subj):
    output = ''
    for s, enc in decode_header(subj):
        if enc:
            output += s.decode(enc)
        else:
            try:
                output += s.decode()
            except AttributeError:
                output += s
    return output

for l in sys.stdin.readlines():
    print(recode_utf8(l).strip())