Mercurial > hg > Feedworm

annotate backend/AbstractFeedUpdater.py @ 166:04c3b9796b89

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
author dirk
date Sat, 03 Sep 2011 04:12:35 +0200
parents 86f828096aaf
children a3c945ce434c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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:
diff changeset
1
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:
diff changeset
2 from datetime import datetime
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:
diff changeset
3 import feedparser
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:
diff changeset
4 import logging
166
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
5 from urllib2 import ProxyHandler
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:
diff changeset
6
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:
diff changeset
7 STATUS_ERROR = 400
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:
diff changeset
8 log = logging.getLogger("FeedUpdater")
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:
diff changeset
9
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:
diff changeset
10 class AbstractFeedUpdater(object):
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:
diff changeset
11 '''
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:
diff changeset
12 Abstract base class for FeedUpdater implementations - handles all the parsing of the feed.
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:
diff changeset
13 Subclasses need to implement creating and storing the new feed entries.
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:
diff changeset
14 '''
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:
diff changeset
15
166
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
16 @staticmethod
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
17 def parseFeed(url):
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
18 proxy = ProxyHandler( {"http":"http://your.proxy.here:8080/"} )
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
19 return feedparser.parse(url, handlers = [proxy])
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:
diff changeset
20
166
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
21 def __init__(self, preferences):
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
22 self.preferences = preferences
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
23
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
24 def update(self, feed):
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
25 self.feed = feed
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
26 log.info("updating " + feed.rss_url)
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
27 result = self._retrieveFeed()
160
86f828096aaf Do not fetch and parse the feed twice when creating a new one. Pass the parsed info into the update method instead to reuse.
dirk
parents: 144
diff changeset
28 self._processEntries(result)
166
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
29 self._setFeedTitle(result)
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:
diff changeset
30
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:
diff changeset
31 def _retrieveFeed(self):
166
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
32 if self.preferences.isProxyConfigured():
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
33 proxyUrl = "http://%s:%i" % (self.preferences.proxyHost(), self.preferences.proxyPort())
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
34 proxyHandler = ProxyHandler({"http" : proxyUrl})
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
35 result = feedparser.parse(self.feed.rss_url, handlers=[proxyHandler])
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
36 else:
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
37 result = feedparser.parse(self.feed.rss_url)
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:
diff changeset
38 # bozo flags if a feed is well-formed.
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:
diff changeset
39 # if result["bozo"] > 0:
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:
diff changeset
40 # raise FeedUpdateException()
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:
diff changeset
41 status = result["status"]
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:
diff changeset
42 if status >= STATUS_ERROR:
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:
diff changeset
43 raise FeedUpdateException("HTTP status " + str(status))
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:
diff changeset
44 return result
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:
diff changeset
45
160
86f828096aaf Do not fetch and parse the feed twice when creating a new one. Pass the parsed info into the update method instead to reuse.
dirk
parents: 144
diff changeset
46 def _processEntries(self, feedDict):
86f828096aaf Do not fetch and parse the feed twice when creating a new one. Pass the parsed info into the update method instead to reuse.
dirk
parents: 144
diff changeset
47 for entry in feedDict.entries:
86f828096aaf Do not fetch and parse the feed twice when creating a new one. Pass the parsed info into the update method instead to reuse.
dirk
parents: 144
diff changeset
48 self._normalize(entry)
86f828096aaf Do not fetch and parse the feed twice when creating a new one. Pass the parsed info into the update method instead to reuse.
dirk
parents: 144
diff changeset
49 self._processEntry(entry)
86f828096aaf Do not fetch and parse the feed twice when creating a new one. Pass the parsed info into the update method instead to reuse.
dirk
parents: 144
diff changeset
50 self._incrementFeedUpdateDate()
86f828096aaf Do not fetch and parse the feed twice when creating a new one. Pass the parsed info into the update method instead to reuse.
dirk
parents: 144
diff changeset
51
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:
diff changeset
52 def _normalize(self, entry):
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:
diff changeset
53 if not hasattr(entry, "id"):
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:
diff changeset
54 entry.id = entry.link
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:
diff changeset
55 if not hasattr(entry, "updated_parsed"):
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:
diff changeset
56 entry.updated_parsed = datetime.today()
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:
diff changeset
57 else:
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:
diff changeset
58 entry.updated_parsed = datetime(*entry.updated_parsed[:6])
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:
diff changeset
59 if not hasattr(entry, "summary"):
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:
diff changeset
60 if hasattr(entry, "content"):
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:
diff changeset
61 entry.summary = entry.content[0].value
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:
diff changeset
62 else:
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:
diff changeset
63 entry.summary = ""
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:
diff changeset
64
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:
diff changeset
65 def _processEntry(self, entry):
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:
diff changeset
66 raise Exception("_processEntry is abstract, subclasses must override")
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:
diff changeset
67
144
74217db92993 updating feeds on the couchdb backend works now
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 141
diff changeset
68 def _incrementFeedUpdateDate(self):
74217db92993 updating feeds on the couchdb backend works now
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 141
diff changeset
69 raise Exception("_incrementNextUpdateDate is abstract, subclasses must override")
74217db92993 updating feeds on the couchdb backend works now
Dirk Olmes <dirk@xanthippe.ping.de>
parents: 141
diff changeset
70
166
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
71 def _setFeedTitle(self, feedDict):
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
72 if self.feed.title is None:
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
73 if feedDict.feed.has_key("title"):
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
74 self.feed.title = feedDict.feed.title
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
75 else:
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
76 self.feed.title = self.feed.rss_url
04c3b9796b89 feedparser uses the proxy now if one is configured. To implement this the FeedUpdater had to change a bit - sqlalchemy backend is not yet refactored.
dirk
parents: 160
diff changeset
77
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:
diff changeset
78
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:
diff changeset
79 class FeedUpdateException(Exception):
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:
diff changeset
80 pass