106 lines
3.0 KiB
Python
106 lines
3.0 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 random
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import shelve
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import string
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import feed
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from flask import abort, Flask, request
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from flask_cors import CORS
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CACHE_LENGTH = 300
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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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flask_app = Flask(__name__)
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cors = CORS(flask_app)
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@flask_app.route('/')
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def index():
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front_page = [news_cache[news_ref_to_id[ref]] for ref in news_list]
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front_page = [copy.deepcopy(x) for x in front_page if 'title' in x]
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for story in front_page:
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if 'comments' in story: story.pop('comments')
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if 'text' in story: story.pop('text')
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return {'stories': front_page}
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@flask_app.route('/<id>')
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def comments(id):
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if id in news_cache:
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return {'story': news_cache[id]}
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with shelve.open(DATA_FILE) as db:
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if id in db:
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return {'story': db[id]}
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abort(404)
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print('Starting Flask...')
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web_thread = threading.Thread(target=flask_app.run, kwargs={'port': 33842})
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web_thread.setDaemon(True)
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web_thread.start()
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def gen_rand_id():
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return ''.join(random.choice(string.ascii_uppercase) for _ in range(4))
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def new_id():
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nid = gen_rand_id()
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with shelve.open(DATA_FILE) as db:
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while nid in news_cache or nid in db:
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nid = gen_rand_id()
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return nid
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try:
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while True:
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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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while len(news_list) > CACHE_LENGTH:
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old_ref = news_list.pop()
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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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with shelve.open(DATA_FILE) as db:
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db[old_id] = old_story
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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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feed.update_story(news_story)
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time.sleep(1)
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news_index += 1
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if news_index == CACHE_LENGTH: news_index = 0
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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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