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254 lines
7.7 KiB
254 lines
7.7 KiB
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 traceback |
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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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ekey = str(e) |
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logging.error('Unable to find key {}. Trying to remove...'.format(ekey)) |
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if ekey in news_cache: |
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news_cache.remove(ekey) |
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if ekey in news_list: |
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news_list.remove(ekey) |
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if ekey in news_ref_to_id: |
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news_ref_to_id.remove(ekey) |
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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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ekey = str(e) |
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logging.error('Unable to find key {}. Trying to remove...'.format(ekey)) |
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if ekey in news_cache: |
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news_cache.remove(ekey) |
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if ekey in news_list: |
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news_list.remove(ekey) |
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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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print(traceback.format_exc()) |
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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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try: |
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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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except KeyError as e: |
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ekey = str(e) |
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logging.error('Unable to find key {}. Trying to remove...'.format(ekey)) |
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if ekey in news_cache: |
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news_cache.remove(ekey) |
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if ekey in news_list: |
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news_list.remove(ekey) |
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if ekey in news_ref_to_id: |
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news_ref_to_id.remove(ekey) |
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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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