Mercurial > hg > Feedworm

annotate FeedUpdater.py @ 65:e24777e346e7

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add a runner script for Xanthippe
author dirk@xanthippe.ping.de
date Thu, 29 Jul 2010 21:05:41 +0200
parents abc0516a1c0c
children 97c4e94f99cf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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6 import logging
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8 STATUS_ERROR = 400
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9 log = logging.getLogger("FeedUpdater")
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11 def updateAllFeeds(session):
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12 allFeeds = findFeedsToUpdate(session)
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13 for feed in allFeeds:
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14 try:
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15 FeedUpdater(session, feed).update()
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16 except FeedUpdateException, fue:
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17 log.warn("problems while updating feed " + feed.rss_url + ": " + str(fue))
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18 session.commit()
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20 def findFeedsToUpdate(session):
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21 return session.query(Feed).filter(Feed.next_update < datetime.now())
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23 def createNewFeed(url, session):
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24 result = feedparser.parse(url)
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25 title = result["feed"].title
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26 newFeed = Feed(title, url)
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27 session.add(newFeed)
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29 FeedUpdater(session, newFeed).update()
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31 def normalize(entry):
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32 if not hasattr(entry, "id"):
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33 entry.id = entry.link
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34 if not hasattr(entry, "updated_parsed"):
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35 entry.updated_parsed = datetime.today()
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36 else:
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37 entry.updated_parsed = datetime(*entry.updated_parsed[:6])
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38 if not hasattr(entry, "summary"):
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39 if hasattr(entry, "content"):
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40 entry.summary = entry.content[0].value
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41 else:
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42 entry.summary = ""
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44 class FeedUpdater(object):
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45 def __init__(self, session, feed):
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46 self.session = session
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47 self.feed = feed
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49 def update(self):
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50 log.info("updating " + self.feed.rss_url)
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51 result = self.getFeed()
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52 for entry in result.entries:
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53 self.processEntry(entry)
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54 self.feed.incrementNextUpdateDate()
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56 def getFeed(self):
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57 result = feedparser.parse(self.feed.rss_url)
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58 if result["status"] >= STATUS_ERROR:
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59 raise FeedUpdateException()
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60 return result
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62 def processEntry(self, entry):
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63 normalize(entry)
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64 feedEntry = FeedEntry.findById(entry.id, self.session)
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65 if feedEntry is None:
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66 self.createFeedEntry(entry)
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68 def createFeedEntry(self, entry):
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69 new = FeedEntry.create(entry)
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70 new.feed = self.feed
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71 self.session.add(new)
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73 class FeedUpdateException(Exception):
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74 pass