Mercurial > hg > Feedworm

annotate FeedUpdater.py @ 102:25fef7c29c5b

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remove all feed entries when removing a feed
author Dirk Olmes <dirk@xanthippe.ping.de>
date Wed, 16 Feb 2011 06:18:40 +0100
parents b2a51c24f209
children e50d446f9942 e4038dd8cc0e
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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 if result.has_key("title"):
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26 title = result["feed"].title
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27 else:
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28 title = url
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29 newFeed = Feed(title, url)
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30 session.add(newFeed)
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32 FeedUpdater(session, newFeed).update()
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34 def normalize(entry):
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35 if not hasattr(entry, "id"):
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36 entry.id = entry.link
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37 if not hasattr(entry, "updated_parsed"):
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38 entry.updated_parsed = datetime.today()
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39 else:
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40 entry.updated_parsed = datetime(*entry.updated_parsed[:6])
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41 if not hasattr(entry, "summary"):
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42 if hasattr(entry, "content"):
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43 entry.summary = entry.content[0].value
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44 else:
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45 entry.summary = ""
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47 class FeedUpdater(object):
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48 def __init__(self, session, feed):
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49 self.session = session
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50 self.feed = feed
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52 def update(self):
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53 log.info("updating " + self.feed.rss_url)
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54 result = self.getFeed()
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55 for entry in result.entries:
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56 self.processEntry(entry)
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57 self.feed.incrementNextUpdateDate()
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59 def getFeed(self):
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60 result = feedparser.parse(self.feed.rss_url)
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61 # bozo flags if a feed is well-formed.
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62 # if result["bozo"] > 0:
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63 # raise FeedUpdateException()
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64 status = result["status"]
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65 if status >= STATUS_ERROR:
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66 raise FeedUpdateException("HTTP status " + str(status))
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67 return result
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69 def processEntry(self, entry):
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70 normalize(entry)
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71 feedEntry = FeedEntry.findById(entry.id, self.session)
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72 if feedEntry is None:
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73 self.createFeedEntry(entry)
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75 def createFeedEntry(self, entry):
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76 new = FeedEntry.create(entry)
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77 new.feed = self.feed
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78 self.session.add(new)
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79 log.info("new feed entry: " + entry.title)
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81 class FeedUpdateException(Exception):
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82 pass