fix-rdf-file.py

#! /usr/bin/env python3


from urllib import parse
import re
import sys


def fix_quoted(s: str) -> str:
    payload = s.strip('"')
    fixed = parse.quote(payload)
    fixed = fixed.replace('http%3A', 'http:')
    fixed = fixed.replace('https%3A', 'https:')
    return '"%s"' % fixed


def print_fixed_line(line: str):
    # https://stackoverflow.com/questions/249791
    regex = r"(\"(?:[^\"]|\\.)*\")"
    matches = re.findall(regex, line)

    for match in matches:
        fixed = fix_quoted(match)
        line = line.replace(match, fixed)

    print(line, end='')


def main():
    for line in sys.stdin:
        print_fixed_line(line)


if __name__ == '__main__':
    try:
        main()
    except (KeyboardInterrupt, SystemExit, BrokenPipeError):
        pass