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#!/usr/bin/env python3
import json
import mimetypes
import os
import re
import xml.etree.cElementTree as ET
from collections import OrderedDict
from operator import getitem
from datetime import date, timedelta
from flask import Flask, request, Response, render_template, send_file
abs_path = os.path.dirname(os.path.abspath(__file__))
app = Flask(__name__)
app.config.from_pyfile(os.path.join(abs_path, 'app.cfg'))
cache_path = os.path.join(abs_path, 'cache')
json_path = os.path.join(cache_path, 'audiobooks.json')
# populate books object from JSON cache sorted by title
if os.path.exists(json_path):
try:
with open(json_path, 'r') as cache:
books = json.load(cache)
books = OrderedDict(sorted(
books.items(),
key=lambda x: x[1]['title']
))
except Exception:
raise ValueError('error loading JSON cache')
else:
raise ValueError('cache not found, run rebuild.py')
def check_auth(username, password):
'''
Authenticate against configured user/pass
'''
ret = (username == app.config['USERNAME'] and
password == app.config['PASSWORD'])
return ret
def escape(s):
'''
Ensure XML-safety of attribute values
'''
s = s.replace('&', '&')
s = s.replace('<', '<')
s = s.replace('>', '>')
s = s.replace('\'', '"')
return s
@app.route('/')
def list_books():
'''
Book listing and audiobook RSS/file download
:a: audiobook hash; if provided without :f: (file) return RSS
:f: file hash; requires associated audiobook (:a:) to download
Listing of audiobooks returned if no params provided
'''
a = request.args.get('a') # audiobook hash
f = request.args.get('f') # file hash
# audiobook and file parameters provided: serve up file
if a and f:
if not books.get(a) or not books[a]['files'].get(f):
return 'book or file not found', 404
f_path = books[a]['files'][f]['path']
return send_file(f_path, conditional=True)
# serve up audiobook RSS feed; only audiobook hash provided
elif a:
if not books.get(a):
return 'book not found', 404
# we only make use of the itunes ns, others provided for posterity
namespaces = {
'itunes':'http://www.itunes.com/dtds/podcast-1.0.dtd',
'googleplay':'http://www.google.com/schemas/play-podcasts/1.0',
'atom':'http://www.w3.org/2005/Atom',
'media':'http://search.yahoo.com/mrss/',
'content':'http://purl.org/rss/1.0/modules/content/',
}
rss = ET.Element('rss')
for k, v in namespaces.items():
rss.set('xmlns:%s' % k, v)
rss.set('version', '2.0')
channel = ET.SubElement(rss, 'channel')
book_title = ET.SubElement(channel, 'title')
book_title.text = books[a]['title']
# sort by track number, alphanumerically if track is absent
track_list = [] # account for duplicates
for a_file in books[a]['files']:
track = books[a]['files'][a_file]['track']
if not track or track in track_list:
key = lambda x: books[a]['files'][x]['title']
break
track_list.append(track)
else:
key = lambda x: books[a]['files'][x]['track']
# populate XML attribute values required by Apple podcasts
for idx, f in enumerate(sorted(books[a]['files'], key=key)):
item = ET.SubElement(channel, 'item')
title = ET.SubElement(item, 'title')
title.text = escape(books[a]['files'][f]['title'])
author = ET.SubElement(item, 'itunes:author')
author.text = escape(books[a]['files'][f]['author'])
category = ET.SubElement(item, 'itunes:category')
category.text = 'Book'
explicit = ET.SubElement(item, 'itunes:explicit')
explicit.text = 'no'
summary = ET.SubElement(item, 'itunes:summary')
summary.text = 'Audiobook served by audiobook-rss'
description = ET.SubElement(item, 'description')
description.text = 'Audiobook served by audiobook-rss'
duration = ET.SubElement(item, 'itunes:duration')
duration.text = str(books[a]['files'][f]['duration_str'])
guid = ET.SubElement(item, 'guid')
guid.text = f # file hash
# pubDate descending, day decremented w/ each iteration
pub_date = ET.SubElement(item, 'pubDate')
pub_date.text = (date(2000, 12, 31) - timedelta(days=idx)).ctime()
enc_attr = {
'url': '{}?a={}&f={}'.format( request.base_url, a, f),
'length': str(books[a]['files'][f]['size_bytes']),
'type': 'audio/mpeg'
}
ET.SubElement(item, 'enclosure', enc_attr)
return Response(
ET.tostring(rss, encoding='utf8', method='xml'),
mimetype='text/xml'
)
else:
auth = request.authorization
if not auth or not check_auth(auth.username, auth.password):
form = {'WWW-Authenticate': 'Basic realm="o/"'}
return Response('unauthorized', 401, form)
return render_template('index.html', books=books)
if __name__ == '__main__':
app.run(host='127.0.0.1', port='8085', threaded=True)
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