Grabs the current song title and artist name playing on hitz.fm and save it in a playlist log file

updater.py

#!/usr/bin/python

"Grabs the current song title and artist name playing on hitz.fm and save it in a playlist log file"

import os
import re
import sys
import time
import urllib2
from email import utils

REGEX = re.compile('^var\s+([^\s]+)\s*="([^"]*)"$', re.MULTILINE)

SONG_LIST_FILE    = 'songs'
CURRENT_SONG_FILE = 'current_song'


def read_url(url):
    req = urllib2.Request(url)
    req.add_header('User-Agent', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) \
    AppleWebKit/530.5 (KHTML, like Gecko) Chrome/2.0.172.33 Safari/530.5')
    f = urllib2.urlopen(req)
    c = f.read()
    f.close()
    return c, f.info()


def parse_js(js):
    "Parses a 'now playing' javascript returing a tuple of artist, song, album"
    matches = dict(REGEX.findall(js))
    for k, v in matches.items():
        matches[k] = v.strip().replace("\t", "").replace("_", " ")
    default = {
        'strthesong'   : '',
        'strartist'    : '',
        'stralbumcover': ''
    }
    default.update(matches)
    return (default['strthesong'], default['strartist'], default['stralbumcover'])


def update():
    "Main function"

    c, info = read_url('http://www.hitz.fm/cgi-bin/dvr/inc_nowplaying_hitz.js')
    c = c.replace("\r", "") # fix windows newline

    now_playing   = "%s\t%s\t%s" % parse_js(c)
    played_at_t   = utils.parsedate(info['last-modified'])
    played_at     = time.mktime(played_at_t)
    last_song     = ''
    last_modified = 0

    for line in open(CURRENT_SONG_FILE):
        last_modified = float(line.split("\t")[0].strip())
        last_song     = "\t".join(line.split("\t")[1:]).strip()
        break # the file is just 1 line

    if played_at > last_modified and now_playing.strip() != last_song:
        for n in [(SONG_LIST_FILE, 'a'), (CURRENT_SONG_FILE, 'w')]:
            f = open(n[0], n[1])
            f.write("%f\t%s\n" % (played_at, now_playing))
            f.close()
        print "%s - %s" % (time.strftime("%x %X", played_at_t), now_playing)


if __name__ == '__main__':
    curdir = os.path.dirname(os.path.abspath(sys.argv[0]))
    SONG_LIST_FILE    = os.path.join(curdir, SONG_LIST_FILE)
    CURRENT_SONG_FILE = os.path.join(curdir, CURRENT_SONG_FILE)

    for n in (SONG_LIST_FILE, CURRENT_SONG_FILE):
        if not os.path.isfile(n):
            f = open(n, 'w')
            f.close()

    try:
        while 1:
            update()
            time.sleep(180)
    except KeyboardInterrupt:
        sys.exit()