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annotate FeedUpdater.py @ 9:fd4c8bfa62d6

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FeedUpdater throws an exception if the URL could not be retrieved successfully. Includes unit tests.
author Dirk Olmes <dirk@xanthippe.ping.de>
date Tue, 27 Apr 2010 10:22:35 +0200
parents 215c34f61e95
children 01a86b178e60
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e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
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2 from datetime import datetime
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3 from Feed import Feed
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4 from FeedEntry import FeedEntry
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5 import feedparser
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7 STATUS_OK = 200
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9 def updateAllFeeds(session):
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10 allFeeds = session.query(Feed)
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11 for feed in allFeeds:
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12 FeedUpdater(session, feed).update()
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13 session.commit()
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15 class FeedUpdater(object):
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16 def __init__(self, session, feed):
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17 self.session = session
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18 self.feed = feed
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20 def update(self):
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21 result = self.getFeed()
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22 for entry in result.entries:
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23 self.processEntry(entry)
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25 def getFeed(self):
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26 result = feedparser.parse(self.feed.rss_url)
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27 if result["status"] is not STATUS_OK:
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28 raise FeedUpdateException()
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29 return result
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31 def processEntry(self, entry):
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32 feedEntry = FeedEntry.findById(entry.id, self.session)
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33 if feedEntry is None:
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34 self.createFeedEntry(entry)
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36 def createFeedEntry(self, entry):
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37 new = FeedEntry()
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38 new.id = entry.id
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39 new.link = entry.link
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40 new.title = entry.title
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41 new.updated = datetime(*entry.updated_parsed[:6])
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42 new.summary = entry.summary
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43 new.feed = self.feed
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44 self.session.add(new)
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46 class FeedUpdateException(Exception):
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47 pass