python 播客源生成器 - 为目录中的一组媒体生成播客RSS源。
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#!/bin/bash
_BASE_URL='http://example.com/audio-books'
_DIR=ASoIaF2_CoK
_BOOK_NAME="A Clash of Kings"
_BOOK_ORDER="second"
_BOOK_DESC="$_BOOK_NAME, the $_BOOK_ORDER book of the A Song of Ice and Fire series by George R. R. Martin"
_FILE_SEED_DATE="1998-11-16 06:30 PST"
#Download the podcastgen script
curl -L --silent https://gist.githubusercontent.com/alghanmi/11102772/raw/podcastgen.py > podcastgen.py
#Changes the file dates to make them in ascending order. This is a hack to make it work
# with Podcatchers that rely on date for order
if [ -n "$_FILE_SEED_DATE" ]; then
SAVEIFS=$IFS
IFS=$(echo -en "\n\b")
_cnt=0
for i in $(find $_DIR -type f | sort); do
(( _cnt += 1 ))
_file_date="$(date -d "$_FILE_SEED_DATE + $_cnt days" +'%Y%m%d%H%M')"
touch -t $_file_date $i
done
IFS=$SAVEIFS
fi
#Generate Podcast for requested file
python podcastgen.py gen $_DIR \
--title "$_BOOK_NAME" \
--desc "$_BOOK_DESC" \
--link "$_BASE_URL/$_DIR" \
--id "$_BASE_URL/$_DIR" \
--feed-link "$_BASE_URL/$_DIR/podcast.xml" \
--logo "$_BASE_URL/$_DIR/logo.jpg" \
--category "Arts" \
--subcategory "Literature" \
--language "en" \
--output podcast_$DIR.xml
#Pretty print the podcast XML file
cat podcast_$DIR.xml | xmllint --format - > $_DIR/podcast.xml && rm podcast_$DIR.xml
"""Podcast Feed Generator
Generate an podcast RSS feed for a set of media in a directory.
Use the list-extensions argument to see the list of supported extensions. You can add custom extensions using
Usage:
podcastgen.py gen <directory> --title=<podcast-title> --link=<podcast-link> --desc=<description> [--output=<rss-feed-file>] [--feed-link=<feed-url>] [--id=<podcast-id>] [--logo=<image_file>] [--category=<itunes-category> [--subcategory=<itunes-category>]] [--language=<language>] [--use-extension=<ext>]
podcastgen.py list-categories
podcastgen.py list-extensions
podcastgen.py -h | --help
podcastgen.py --version
Arguments:
gen Generate the podcast
list-categories Show all Podcast categories
list-extensions List all supported extensions
<directory> the directory containing all the files
Options:
--title The title of the podcast
--link URL associated with the podcast (i.e. podcast webpage)
--desc A short description of the podcast
--id Feed id is a universally unique URI
--feed-link URL for the Podcast feed itself
--logo Logo file for the feed
--category iTunes category for podcast
--subcategory iTunes sub-category based on the iTunes list above
--language The language of the podcast using the two-character language id, e.g. en, fr or de
--use-extension Add an extension to the list of supported extensions when generating the podcast
--output Write-output to <rss-feed-file>. Default is
-h --help Show this screen
--version Show version
Dependencies:
docopt - pip install docopt
feedgen - pip install feedgen
mutagen - pip install mutagen
"""
from docopt import docopt
import datetime
from feedgen.entry import FeedEntry
from feedgen.ext import podcast
from feedgen.ext import podcast_entry
from feedgen.ext.podcast import PodcastExtension
from feedgen.feed import FeedGenerator
import mimetypes
import mutagen
from mutagen.easyid3 import EasyID3
import os
import re
import urllib
_podcast_file_extensions = [ 'avi', 'm4a', 'm4v', 'mov', 'mp3', 'mp4', 'ogg', 'wav', 'wmv', 'flac' ]
def get_media_file_pattern(extra_extensions=None):
''' Generate the Regular Expression to match all podcast files '''
pattern = ''
if extra_extensions is not None:
_podcast_file_extensions.append(extra_extensions)
for ext in _podcast_file_extensions:
pattern = '{}|.*\.{}'.format(pattern, ext)
return pattern[1:]
def check_category(category, subcategory=None):
''' Check the validity of a provided category '''
if category in PodcastExtension._itunes_categories and subcategory is None:
return True
elif category in PodcastExtension._itunes_categories is not None and subcategory in PodcastExtension._itunes_categories[category] is not None:
return True
return False
def get_feed_entry(media_file, basedir, baselink, image_url):
''' Generate a feed entry based on ID3 Data
TODO: Deal with files with no ID3 Data
'''
fe = FeedEntry ()
fe.load_extension('podcast')
file_path = '{}/{}'.format(basedir, media_file)
media_info = EasyID3(file_path)
media_length_s = mutagen.File(file_path).info.length
media_length = datetime.timedelta(seconds=round(media_length_s))
fe.title(media_info['title'][0])
fe.description('Part {} of {}'.format(media_info['tracknumber'][0], media_info['album'][0]))
fe.podcast.itunes_duration(media_length)
url = '{}/{}'.format(baselink, urllib.pathname2url(media_file))
fe.id(url)
fe.link(href=url, rel='alternate')
fe.pubdate('{} +0000'.format(datetime.datetime.utcfromtimestamp(os.path.getmtime(file_path))))
fe.enclosure(url, str(os.path.getsize(file_path)), mimetypes.guess_type(file_path)[0])
#Found no need to for this at this time since all podcasts have the same feed image
#fe.podcast.itunes_image(image_url)
return fe
if __name__ == '__main__':
args = docopt(__doc__, version='PodcastGen v0.6')
#pprint(args)
''' Generate Podcast Feed '''
if args['gen'] is True:
#Check if <directory> exists and readable
if os.path.exists(args['<directory>']) is False:
print '[ERROR] Directory "{}" does not exist'.format(args['<directory>'])
exit(1)
elif os.path.isdir(args['<directory>']) is False:
print '[ERROR] "{}" does represent a directory'.format(args['<directory>'])
exit(1)
#Get File list and prune out all non-podcast files
feed_files = []
media_re = re.compile(get_media_file_pattern(args['--use-extension']), re.IGNORECASE)
for root, dirs, all_files in os.walk(args['<directory>']):
for f in all_files:
if media_re.match(f) is not None:
feed_files.append(f)
feed_files.sort()
#Exit program if no files match
if len(feed_files) <= 0:
print '[ERROR] "{}" does not have any podcast media files'.format(args['<directory>'])
exit(1)
#Initialize Podcast feed
fg = FeedGenerator()
fg.load_extension('podcast')
#Check if [sub]categories are valid
if(args['--category'] is not None):
if check_category(args['--category'], args['--subcategory']) is False:
print '[ERROR] Invalid podcast categories. Use the the list-categories option to see valid categories'
exit(1)
if args['--subcategory'] is not None:
fg.podcast.itunes_category(args['--category'], args['--subcategory'])
else:
fg.podcast.itunes_category(args['--category'])
#Podcast Details
fg.title(args['--title'])
fg.link(href=args['--link'], rel='alternate')
fg.description(args['--desc'])
if args['--id'] is not None:
fg.id(args['--id'])
if args['--logo'] is not None:
fg.logo(logo=args['--logo'])
fg.image(url=args['--logo'], title=args['--title'])
fg.podcast.itunes_image(args['--logo'])
if args['--language'] is not None:
fg.language(args['--language'])
if args['--feed-link'] is not None:
fg.link(href=args['--feed-link'], rel='self')
#Clean-up link string: trim spaces and remove trailing slash
link = args['--link'].strip()
if link[len(link) - 1] == '/':
link = link[:len(link)-1]
#Generate feed items from files in directory.
for item in feed_files:
fg.add_entry(get_feed_entry(item, args['<directory>'], link, args['--logo']))
#Write RSS feed
feed_file = 'podcast.xml'
if args['--output'] is not None:
feed_file = args['--output']
fg.rss_str(pretty=True)
fg.rss_file(feed_file)
elif args['list-categories'] is True:
for cat in PodcastExtension._itunes_categories:
print '+ {}'.format(cat)
for sub in PodcastExtension._itunes_categories[cat]:
print'\t- {}'.format(sub)
elif args['list-extensions'] is True:
for ext in _podcast_file_extensions:
print '{}'.format(ext)
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