Mercurial > hg > Feedworm

annotate backend/sqlalchemy/FeedUpdater.py @ 154:2682db280be0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
reorder methods
author Dirk Olmes <dirk@xanthippe.ping.de>
date Sat, 27 Aug 2011 07:32:01 +0200
parents 74217db92993
children 86f828096aaf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
1
141
6ea813cfac33 pull out common code for updating a feed into an abstract class, have the sqlalchemy backend use that class.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 123
diff changeset
2 from backend.AbstractFeedUpdater import AbstractFeedUpdater, FeedUpdateException
5
bfd47f55d85b add the updated date of the feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 4
diff changeset
3 from datetime import datetime
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
4 from Feed import Feed
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
5 from FeedEntry import FeedEntry
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
6 import feedparser
11
e87c54b3a216 use the logging framework for printing messages
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 10
diff changeset
7 import logging
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
8
28
72dfae865899 better logging when updating feeds, handle entries that have no id
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 27
diff changeset
9 log = logging.getLogger("FeedUpdater")
9
fd4c8bfa62d6 FeedUpdater throws an exception if the URL could not be retrieved successfully. Includes unit tests.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 7
diff changeset
10
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
11 def updateAllFeeds(session):
35
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 28
diff changeset
12 allFeeds = findFeedsToUpdate(session)
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
13 for feed in allFeeds:
10
01a86b178e60 catch the FeedUpdateException that might be raised when updating a feed, print it and continue with next feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 9
diff changeset
14 try:
01a86b178e60 catch the FeedUpdateException that might be raised when updating a feed, print it and continue with next feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 9
diff changeset
15 FeedUpdater(session, feed).update()
62
abc0516a1c0c FeedEntry provides a static method for creating new entries: better modularization and support for working with the class in interactive mode. FeedUpdater's normalize method is a module function now, again for ease of use in interactive scenarios
dirk@xanthippe.ping.de
parents: 58
diff changeset
16 except FeedUpdateException, fue:
abc0516a1c0c FeedEntry provides a static method for creating new entries: better modularization and support for working with the class in interactive mode. FeedUpdater's normalize method is a module function now, again for ease of use in interactive scenarios
dirk@xanthippe.ping.de
parents: 58
diff changeset
17 log.warn("problems while updating feed " + feed.rss_url + ": " + str(fue))
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
18 session.commit()
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
19
35
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 28
diff changeset
20 def findFeedsToUpdate(session):
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 28
diff changeset
21 return session.query(Feed).filter(Feed.next_update < datetime.now())
aaec263f07ca Feeds manage the point in time when the next update should happen. FeedUpdater only updates feeds that are due.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 28
diff changeset
22
123
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
23 def createNewFeed(url, session):
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
24 # when updating to python3 see http://code.google.com/p/feedparser/issues/detail?id=260
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
25 result = feedparser.parse(url)
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
26 if result.has_key("title"):
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
27 title = result["feed"].title
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
28 else:
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
29 title = url
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
30 newFeed = Feed(title, url)
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
31 session.add(newFeed)
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
32
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
33 FeedUpdater(session, newFeed).update()
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
34
862760b161b4 restructured adding a feed so that only the URL is passed into the backend - the rest of the operation is backend-internal
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 121
diff changeset
35
141
6ea813cfac33 pull out common code for updating a feed into an abstract class, have the sqlalchemy backend use that class.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 123
diff changeset
36 class FeedUpdater(AbstractFeedUpdater):
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
37 def __init__(self, session, feed):
141
6ea813cfac33 pull out common code for updating a feed into an abstract class, have the sqlalchemy backend use that class.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 123
diff changeset
38 AbstractFeedUpdater.__init__(self, feed)
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
39 self.session = session
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
40
141
6ea813cfac33 pull out common code for updating a feed into an abstract class, have the sqlalchemy backend use that class.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 123
diff changeset
41 def _processEntry(self, entry):
4
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
42 feedEntry = FeedEntry.findById(entry.id, self.session)
e0199f383442 retrieve a feed for the given URL, store entries as feed_entry rows into the database
Dirk Olmes <dirk@xanthippe.ping.de>
parents:
diff changeset
43 if feedEntry is None:
141
6ea813cfac33 pull out common code for updating a feed into an abstract class, have the sqlalchemy backend use that class.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 123
diff changeset
44 self._createFeedEntry(entry)
100
99807963d9e0 use the URL as feed title if the feed itself does not come with a title
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 85
diff changeset
45
141
6ea813cfac33 pull out common code for updating a feed into an abstract class, have the sqlalchemy backend use that class.
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 123
diff changeset
46 def _createFeedEntry(self, entry):
62
abc0516a1c0c FeedEntry provides a static method for creating new entries: better modularization and support for working with the class in interactive mode. FeedUpdater's normalize method is a module function now, again for ease of use in interactive scenarios
dirk@xanthippe.ping.de
parents: 58
diff changeset
47 new = FeedEntry.create(entry)
5
bfd47f55d85b add the updated date of the feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 4
diff changeset
48 new.feed = self.feed
bfd47f55d85b add the updated date of the feed
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 4
diff changeset
49 self.session.add(new)
66
97c4e94f99cf log when creating a new FeedEntry
dirk@xanthippe.ping.de
parents: 62
diff changeset
50 log.info("new feed entry: " + entry.title)
144
74217db92993 updating feeds on the couchdb backend works now
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 143
diff changeset
51
74217db92993 updating feeds on the couchdb backend works now
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 143
diff changeset
52 def _incrementFeedUpdateDate(self):
74217db92993 updating feeds on the couchdb backend works now
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 143
diff changeset
53 self.feed.incrementNextUpdateDate()