send This American Life episodes to Huffduffer

tal.py

#!/usr/bin/env python3
"""Simple scraper for adding This American Life episodes to Huffduffer.

TAL has the most amazing app on the App Store, but some stuff broke on
iOS 6 and it doesn't seem to get bug fixes very often. This is my ad-hoc
solution.
"""
import urllib.request
import urllib.parse
import sys
import bs4
import cgi
import cgitb

PAGE_FMT = 'http://www.thisamericanlife.org/radio-archives/episode/{}'
AUDIO_FMT = 'http://audio.thisamericanlife.org/jomamashouse/ismymamashouse' \
            '/{}.mp3'
HUFFDUFF_URL = 'http://huffduffer.com/add'

def scrape(epnum):
    url = PAGE_FMT.format(epnum)
    soup = bs4.BeautifulSoup(urllib.request.urlopen(url).read())

    title = soup.find(class_='node-title').get_text().strip()
    date = soup.find(class_='date').get_text().strip()
    description = soup.find(class_='description').get_text().strip()

    audio_url = AUDIO_FMT.format(epnum)

    return {
        'title': title,
        'date': date,
        'description': description,
        'url': url,
        'audio_url': audio_url,
    }

def huffduff(info):
    args = {
        'bookmark[url]': info['audio_url'],
        'bookmark[title]': 'TAL {}'.format(info['title']),
        'bookmark[description]': info['description'],
        'bookmark[tags]': 'This American Life',
    }
    url = '{}?{}'.format(HUFFDUFF_URL, urllib.parse.urlencode(args))
    return url

def cgi_redirect():
    cgitb.enable()

    form = cgi.FieldStorage()
    if 'ep' not in form:
        print('Content-Type: text/plain')
        print()
        print('Specify an episode number.')
        return
    epnum = int(form['ep'].value)

    url = huffduff(scrape(epnum))
    print('Content-Type: text/html')
    print('Status: 302 Found')
    print('Location: ' + url)
    print()
    print('<a href="{}">huffduff</a>'.format(url))

if __name__ == '__main__':
    # For the command line.
    # print(huffduff(scrape(int(sys.argv[1]))))
    # As a CGI script.
    cgi_redirect()