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