Script to allow html/url encode/decode of file(s)/stdin.

endecode.py

#!/usr/bin/env python3

# Suggested use:
# alias urldecode="endecode.py -a url_decode $*" 
# alias urlencode="endecode.py -a url_encode $*"
# alias htmldecode="endecode.py -a html_decode $*"
# alias htmlencode="endecode.py -a html_encode $*"

# Encode or decode url or html encoded/plain files.
import sys
import fileinput
import argparse
import html
import urllib.parse as ul

VERSION = '0.1.0'

action_map = {
    "html_encode": lambda str: html.escape(str),
    "html_decode": lambda str: html.unescape(str),
    "url_encode": lambda str: ul.unquote_plus(str),
    "url_decide": lambda str: ul.quote_plus(str)
}

# python3 https://www.python.org/dev/peps/pep-0448/
actions = [*action_map.keys()]


# Set up the command line parser. The -h and --help switches are automatically
# enabled. See http://docs.python.org/library/argparse.html
#
ap = argparse.ArgumentParser(description='Utility for processing text.')

ap.add_argument('-v', '--version', action='version', version='%(prog)s ' + VERSION)
ap.add_argument('-l', '--list', action='store_true')
ap.add_argument('files', metavar='FILE', nargs='*',
                help='the files to read')
ap.add_argument('-a', '--action', action='store', choices=actions,
                default=actions[0], help='List filenames')

args = ap.parse_args()

# Iterate over all input files: If no file names are given on the command line,
# read from stdin. Otherwise iterate over all given files, with '-' being
# stdin. See http://docs.python.org/library/fileinput.html
#
with fileinput.input(args.files) as f:
    for line in f:
        if args.list and f.isfirstline():
            print('==>', f.filename(), '<==', file=sys.stderr)
        print(action_map[args.action](line),end='')