import json
import dateutil
import configparser
from datetime import datetime, timezone
from flask import Flask, request, abort
from feedgen.feed import FeedGenerator
from pony import orm
from pony.orm import Required, Optional, Set, desc
config = configparser.ConfigParser()
config.read('settings.ini')
site_url = config['general']['site_url']
if site_url[:-1] != '/':
site_url += '/'
site_url += 'feeds/'
app = Flask(__name__)
db = orm.Database()
class Feed(db.Entity):
slug = Required(str, unique=True)
admin_token = Required(str)
title = Required(str)
atom_id = Required(str) # also link
description = Required(str)
login = Optional(str)
password = Optional(str)
items = Set('Item')
class Item(db.Entity):
feed = Required(Feed)
atom_id = Required(str)
title = Required(str)
content = Required(str)
date = Required(datetime)
db_config = config['db']
db_adapter = db_config['adapter']
if db_adapter == 'sqlite':
filename = db_config['filename']
db.bind(provider='sqlite', filename=filename, create_db=True)
elif db_adapter == 'postgres':
user = db_config['user']
password = db_config['password']
host = db_config['host']
database = db_config['database']
db.bind(provider='postgres', user=user, password=password, host=host, database=database)
else:
raise Exception('unhandled db adapter: {}'.format(db_adapter))
db.generate_mapping(create_tables=True)
def does_slug_exist(slug):
with orm.db_session:
return len(orm.select(f for f in Feed if f.slug == slug)[:1])
@app.route('/feeds', methods=['GET', 'POST'])
@orm.db_session
def add_feed():
if request.method == 'GET':
feeds = orm.select(f for f in Feed if f.password is '')
links = []
for f in feeds:
link = '{}'.format(site_url, f.slug, f.title)
links.append(link)
return """
""".format('\n'.join(links))
data = request.get_json(silent=True)
if 'slug' not in data:
abort(400, 'missing slug')
slug = data['slug']
if does_slug_exist(slug):
abort(400, "feed with this slug already exists")
if 'title' not in data or 'description' not in data or 'admin_token' not in data:
abort(400, "missing title or description or admin_token")
url = site_url + slug
feed = Feed(slug=slug,
admin_token=data['admin_token'],
title=data['title'],
atom_id=url,
description=data['description'])
if 'login' in data and 'password' in data:
feed.login = data['login']
feed.password = data['password']
return "OK"
@app.route('/feeds/', methods=['GET', 'POST'])
@orm.db_session
def by_feed_name(slug):
if not does_slug_exist(slug):
abort(404, "unknown slug")
feed = orm.select(f for f in Feed if f.slug == slug)[:1][0]
if feed.password is not '':
auth = request.authorization
if not auth or auth.username != feed.login or auth.password != feed.password:
abort(401, "missing or incorrect password")
if request.method == 'POST':
data = request.get_json(silent=True)
if 'title' not in data or 'content' not in data or 'admin_token' not in data:
abort(400, "missing title or content")
if data['admin_token'] != feed.admin_token:
abort(401, "incorrect admin_token")
item_id = feed.atom_id + '/' + str(len(feed.items))
date = datetime.now(dateutil.tz.tzutc())
with orm.db_session:
item = Item(feed=feed,
atom_id=item_id,
title=data['title'],
content=data['content'],
date=date)
return "OK"
gen = FeedGenerator()
gen.title(feed.title)
gen.id(feed.atom_id)
gen.link(href=feed.atom_id)
gen.description(feed.description)
# Take the items by reversed date order. When adding them in the RSS feed,
# order will be reversed again (first in array will end up last in the
# feed), so explicitly reverse one more time.
items = reversed(feed.items.order_by(desc(Item.date))[:20])
for item in items:
fe = gen.add_entry()
fe.id(item.atom_id)
fe.title(item.title)
fe.content(item.content)
date = item.date.replace(tzinfo=timezone.utc)
fe.published(date)
return gen.rss_str(pretty=True).decode('utf8')
if __name__ == '__main__':
debug_str = config['general'].get('debug', 'False')
debug = debug_str != 'False' and debug_str != 'false'
orm.set_sql_debug(debug)
app.run(debug=debug, host='0.0.0.0')