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utilities.py
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utilities.py
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# -*- coding: utf-8 -*-
##code-section module-header #fill in your manual code here
import urllib2
import os
import md5
import tempfile
from xml.dom import minidom
import feedparser
from zope import component
from zope import event
from DateTime import DateTime
from Products.feedfeeder.interfaces.container import IFeedsContainer
from Products.feedfeeder.interfaces.contenthandler import IFeedItemContentHandler
from Products.feedfeeder.events import FeedItemConsumedEvent
##/code-section module-header
from Products.feedfeeder.interfaces.consumer import IFeedConsumer
from zope import interface
class FeedConsumer:
"""
"""
# zope3 interfaces
interface.implements(IFeedConsumer)
##code-section class-header_FeedConsumer #fill in your manual code here
##/code-section class-header_FeedConsumer
def retrieveFeedItems(self, container):
feedContainer = IFeedsContainer(container)
for url in feedContainer.getFeeds():
self._retrieveSingleFeed(feedContainer, url)
def tryRenamingEnclosure(self, enclosure, feeditem):
newId = enclosure.Title()
for x in range(1, 10):
if newId not in feeditem.objectIds():
try:
feeditem.manage_renameObject(enclosure.getId(),
newId)
break
except:
pass
newId = '%i_%s' % (x, enclosure.Title())
def _retrieveSingleFeed(self, feedContainer, url):
# feedparser doesn't understand proper file: url's
if url.startswith('file://'):
url = url[7:]
if not os.path.exists(url):
raise IOError("Couldn't locate %r" % url)
parsed = feedparser.parse(url)
for entry in parsed.entries:
sig = md5.new(entry.id)
id = sig.hexdigest()
updated = DateTime(entry.updated)
prev = feedContainer.getItem(id)
if prev is None:
# Completely new item, add it.
addItem = feedContainer.addItem
elif updated > prev.getFeedItemUpdated():
# Refreshed item, replace it.
addItem = feedContainer.replaceItem
else:
# Not new, not refreshed: let it be, laddy.
continue
obj = addItem(id)
linkDict = getattr(entry, 'link', None)
if linkDict:
# Hey, that's not a dict at all; at least not in my test.
#link = linkDict['href']
link = linkDict
else:
linkDict = getattr(entry, 'links', [{'href': ''}])[0]
link = linkDict['href']
summary = getattr(entry, 'summary' , '')
obj.update(id=id, title=entry.title, description=summary,
feedItemAuthor=getattr(entry, 'author', ''),
feedItemUpdated=updated,
link=link)
if hasattr(entry, 'content'):
content = entry.content[0]
if content['type'] in ('text/xhtml', 'application/xhtml+xml'):
# Warning: minidom.parseString needs a byte
# string, not a unicode one, so we need to
# encode it first.
# http://evanjones.ca/python-utf8.html
doc = minidom.parseString(content['value'].encode('utf-8'))
if len(doc.childNodes) > 0 and doc.firstChild.hasAttributes():
handler = None
top = doc.firstChild
cls = top.getAttribute('class')
if cls:
handler = component.queryAdapter(obj,
IFeedItemContentHandler,
name=cls)
if handler is None:
handler = component.queryAdapter(obj,
IFeedItemContentHandler)
if handler is None:
obj.update(text=content['value'])
else:
handler.apply(top)
# Grab the first non-<dl> node and treat
# that as the content.
actualContent = None
for node in top.childNodes:
if node.nodeName == 'div':
actualContent = node.toxml()
obj.update(text=actualContent)
break
else:
obj.update(text=content['value'])
else:
obj.update(text=content['value'])
if hasattr(entry, 'links'):
enclosures = [x for x in entry.links if x.rel == 'enclosure']
real_enclosures = [x for x in enclosures if
not self.isHTMLEnclosure(x)]
for link in real_enclosures:
enclosureSig = md5.new(link.href)
enclosureId = enclosureSig.hexdigest()
enclosure = obj.addEnclosure(enclosureId)
enclosure.update(title=enclosureId)
updateWithRemoteFile(enclosure, link)
if enclosure.Title() != enclosure.getId():
self.tryRenamingEnclosure(enclosure, obj)
if obj is not None:
event.notify(FeedItemConsumedEvent(obj))
def isHTMLEnclosure(self, enclosure):
return enclosure.type == u'text/html'
##code-section module-footer #fill in your manual code here
import re
RE_FILENAME = re.compile('filename *= *(.*)')
def updateWithRemoteFile(obj, link):
file = tempfile.TemporaryFile('w+b')
try:
remote = urllib2.urlopen(link.href.encode('utf-8'))
info = remote.info()
filename = None
if link.href.startswith('file:'):
pos = link.href.rfind('/')
if pos > -1:
filename = link.href[pos+1:]
else:
filename = link.href[5:]
disp = info.get('Content-Disposition', None)
if disp is not None:
m = RE_FILENAME.search(disp)
if m is not None:
filename = m.group(1).strip()
if filename is not None:
obj.update(title=filename)
max = 2048
sz = max
while sz == max:
buffer = remote.read(max)
sz = len(buffer)
if sz > 0:
file.write(buffer)
file.flush()
file.seek(0)
obj.update_data(file, link.type)
file.close()
except urllib2.URLError, e:
# well, if we cannot retrieve the data, the file object will
# remain empty
pass
except OSError, e:
# well, if we cannot retrieve the data, the file object will
# remain empty
pass
##/code-section module-footer