233 lines
6.9 KiB
Python
233 lines
6.9 KiB
Python
import logging
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logging.basicConfig(
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format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
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level=logging.INFO)
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import copy
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import threading
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import time
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import shelve
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from urllib.parse import urlparse, parse_qs
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import archive
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import feed
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from utils import gen_rand_id
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from flask import abort, Flask, request, render_template, stream_with_context, Response
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from werkzeug.exceptions import NotFound
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from flask_cors import CORS
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import gevent
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from gevent import monkey
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from gevent.pywsgi import WSGIServer
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monkey.patch_all()
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archive.init()
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CACHE_LENGTH = 150
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DATA_FILE = 'data/data'
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news_index = 0
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with shelve.open(DATA_FILE) as db:
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logging.info('Reading caches from disk...')
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news_list = db.get('news_list', [])
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news_ref_to_id = db.get('news_ref_to_id', {})
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news_cache = db.get('news_cache', {})
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# clean cache if broken
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try:
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for ref in news_list:
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nid = news_ref_to_id[ref]
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_ = news_cache[nid]
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except KeyError as e:
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logging.error('Unable to find key {}. Trying to remove...'.format(str(e)))
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news_list.remove(str(e))
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def get_story(sid):
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if sid in news_cache:
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return news_cache[sid]
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else:
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return archive.get_story(sid)
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def new_id():
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nid = gen_rand_id()
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while nid in news_cache or archive.get_story(nid):
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nid = gen_rand_id()
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return nid
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def remove_ref(old_ref):
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while old_ref in news_list:
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news_list.remove(old_ref)
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old_story = news_cache.pop(news_ref_to_id[old_ref])
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old_id = news_ref_to_id.pop(old_ref)
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logging.info('Removed ref {} id {}.'.format(old_ref, old_id))
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build_folder = '../webclient/build'
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flask_app = Flask(__name__, template_folder=build_folder, static_folder=build_folder, static_url_path='')
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cors = CORS(flask_app)
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@flask_app.route('/api')
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def api():
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try:
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front_page = [news_cache[news_ref_to_id[ref]] for ref in news_list]
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except KeyError as e:
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logging.error('Unable to find key {}. Trying to remove...'.format(str(e)))
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news_list.remove(str(e))
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front_page = [copy.copy(x) for x in front_page if 'title' in x and x['title']]
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front_page = front_page[:60]
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for story in front_page:
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story.pop('text', None)
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story.pop('comments', None)
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return {'stories': front_page}
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@flask_app.route('/api/search', strict_slashes=False)
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def search():
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search = request.args.get('q', '')
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if len(search) >= 3:
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res = archive.search(search)
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else:
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res = []
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return {'results': res}
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@flask_app.route('/api/submit', methods=['POST'], strict_slashes=False)
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def submit():
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try:
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url = request.form['url']
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nid = new_id()
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parse = urlparse(url)
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if 'news.ycombinator.com' in parse.hostname:
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source = 'hackernews'
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ref = parse_qs(parse.query)['id'][0]
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elif 'tildes.net' in parse.hostname and '~' in url:
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source = 'tildes'
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ref = parse.path.split('/')[2]
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elif 'reddit.com' in parse.hostname and 'comments' in url:
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source = 'reddit'
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ref = parse.path.split('/')[4]
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else:
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source = 'manual'
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ref = url
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news_story = dict(id=nid, ref=ref, source=source)
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news_cache[nid] = news_story
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valid = feed.update_story(news_story, is_manual=True)
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if valid:
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archive.update(news_story)
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return {'nid': nid}
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else:
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news_cache.pop(nid, '')
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raise Exception('Invalid article')
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except BaseException as e:
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logging.error('Problem with article submission: {} - {}'.format(e.__class__.__name__, str(e)))
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abort(400)
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@flask_app.route('/api/<sid>')
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def story(sid):
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story = get_story(sid)
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return dict(story=story) if story else abort(404)
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@flask_app.route('/')
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@flask_app.route('/search')
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def index():
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return render_template('index.html',
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title='Feed',
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url='news.t0.vc',
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description='Reddit, Hacker News, and Tildes combined, then pre-rendered in reader mode')
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@flask_app.route('/<sid>', strict_slashes=False)
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@flask_app.route('/<sid>/c', strict_slashes=False)
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def static_story(sid):
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try:
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return flask_app.send_static_file(sid)
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except NotFound:
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pass
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story = get_story(sid)
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if not story: return abort(404)
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score = story['score']
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num_comments = story['num_comments']
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source = story['source']
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description = '{} point{}, {} comment{} on {}'.format(
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score, 's' if score != 1 else '',
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num_comments, 's' if num_comments != 1 else '',
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source)
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url = urlparse(story['url']).hostname or urlparse(story['link']).hostname or ''
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url = url.replace('www.', '')
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return render_template('index.html',
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title=story['title'],
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url=url,
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description=description)
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http_server = WSGIServer(('', 33842), flask_app)
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def feed_thread():
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global news_index
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try:
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while True:
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# onboard new stories
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if news_index == 0:
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feed_list = feed.list()
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new_items = [(ref, source) for ref, source in feed_list if ref not in news_list]
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for ref, source in new_items:
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news_list.insert(0, ref)
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nid = new_id()
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news_ref_to_id[ref] = nid
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news_cache[nid] = dict(id=nid, ref=ref, source=source)
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if len(new_items):
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logging.info('Added {} new refs.'.format(len(new_items)))
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# drop old ones
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while len(news_list) > CACHE_LENGTH:
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old_ref = news_list[-1]
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remove_ref(old_ref)
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# update current stories
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if news_index < len(news_list):
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update_ref = news_list[news_index]
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update_id = news_ref_to_id[update_ref]
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news_story = news_cache[update_id]
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valid = feed.update_story(news_story)
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if valid:
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archive.update(news_story)
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else:
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remove_ref(update_ref)
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else:
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logging.info('Skipping update - no story #' + str(news_index+1))
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gevent.sleep(6)
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news_index += 1
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if news_index == CACHE_LENGTH: news_index = 0
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except KeyboardInterrupt:
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logging.info('Ending feed thread...')
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except ValueError as e:
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logging.error('feed_thread error: {} {}'.format(e.__class__.__name__, e))
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http_server.stop()
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print('Starting Feed thread...')
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gevent.spawn(feed_thread)
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print('Starting HTTP thread...')
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try:
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http_server.serve_forever()
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except KeyboardInterrupt:
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logging.info('Exiting...')
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finally:
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with shelve.open(DATA_FILE) as db:
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logging.info('Writing caches to disk...')
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db['news_list'] = news_list
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db['news_ref_to_id'] = news_ref_to_id
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db['news_cache'] = news_cache
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