Finish prototype api server

apiserver/server.py

@@ -0,0 +1,95 @@
+import logging
+logging.basicConfig(
+        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
+        level=logging.INFO)
+
+import copy
+import threading
+import time
+import random
+import requests
+import string
+
+from feeds import hackernews
+from flask import abort, Flask, request
+from flask_cors import CORS
+
+CACHE_LENGTH = 300
+READ_API = 'http://127.0.0.1:33843'
+
+news_index = 0
+news_list = []
+news_ref_to_id = {}
+news_cache = {}
+
+flask_app = Flask(__name__)
+cors = CORS(flask_app)
+
+@flask_app.route('/')
+def index():
+    front_page = [news_cache[news_ref_to_id[ref]] for ref in news_list]
+    front_page = [copy.deepcopy(x) for x in front_page if 'title' in x]
+    for story in front_page:
+        if 'comments' in story: story.pop('comments')
+        if 'text' in story: story.pop('text')
+    return {'stories': front_page}
+
+@flask_app.route('/<id>')
+def comments(id):
+    if id in news_cache:
+        return {'story': news_cache[id]}
+    else:
+        abort(404)
+
+print('Starting Flask...')
+web_thread = threading.Thread(target=flask_app.run, kwargs={'port': 33842})
+web_thread.setDaemon(True)
+web_thread.start()
+
+def new_id():
+    return ''.join(random.choice(string.ascii_uppercase) for _ in range(4))
+
+def get_article(url):
+    try:
+        r = requests.post(READ_API, data=dict(url=url), timeout=10)
+
+        if r.status_code != 200:
+            raise
+
+        return r.text
+    except:
+        return '<p>Problem parsing article :(</p>'
+
+while True:
+    if news_index == 0:
+        feed = hackernews.feed()
+        new_refs = [ref for ref in feed if ref not in news_list]
+        for ref in new_refs:
+            news_list.insert(0, ref)
+            nid = new_id()
+            news_ref_to_id[ref] = nid
+            news_cache[nid] = dict(id=nid, ref=ref)
+
+        if len(new_refs):
+            logging.info('Added {} new refs.'.format(len(new_refs)))
+
+        while len(news_list) > CACHE_LENGTH:
+            old_ref = news_list.pop()
+            del news_cache[news_ref_to_id[old_ref]]
+            del news_ref_to_id[old_ref]
+            logging.info('Removed ref {}.'.format(old_ref))
+
+    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]
+        story = hackernews.story(update_ref)
+        if story:
+            news_story.update(story)
+        if news_story.get('url', '') and not news_story.get('text', ''):
+            news_story['text'] = get_article(news_story['url'])
+
+    time.sleep(1)
+
+    news_index += 1
+    if news_index == CACHE_LENGTH: news_index = 0