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from StringIO import StringIO
from xml.sax.saxutils import escape
from genshi.input import HTMLParser, XMLParser
from genshi.template import Context, MarkupTemplate
subscriptions = []
feed_types = [
'application/atom+xml',
'application/rss+xml',
'application/rdf+xml'
]
def norm(value):
""" Convert to Unicode """
if hasattr(value,'items'):
return dict([(norm(n),norm(v)) for n,v in value.items()])
try:
return value.decode('utf-8')
except:
return value.decode('iso-8859-1')
def find_config(config, feed):
# match based on self link
for link in feed.links:
if link.has_key('rel') and link.rel=='self':
if link.has_key('type') and link.type in feed_types:
if link.has_key('href') and link.href in subscriptions:
return norm(dict(config.parser.items(link.href)))
# match based on name
for sub in subscriptions:
if config.parser.has_option(sub, 'name') and \
norm(config.parser.get(sub, 'name')) == feed.planet_name:
return norm(dict(config.parser.items(sub)))
return {}
class XHTMLParser(object):
""" parse an XHTML fragment """
def __init__(self, text):
self.parser = XMLParser(StringIO("<div>%s</div>" % text))
self.depth = 0
def __iter__(self):
self.iter = self.parser.__iter__()
return self
def next(self):
object = self.iter.next()
if object[0] == 'END': self.depth = self.depth - 1
predepth = self.depth
if object[0] == 'START': self.depth = self.depth + 1
if predepth: return object
return self.next()
def streamify(text,bozo):
""" add a .stream to a _detail textConstruct """
if text.type == 'text/plain':
text.stream = HTMLParser(StringIO(escape(text.value)))
elif text.type == 'text/html' or bozo != 'false':
text.stream = HTMLParser(StringIO(text.value))
else:
text.stream = XHTMLParser(text.value)
def run(script, doc, output_file=None, options={}):
""" process an Genshi template """
context = Context(**options)
tmpl_fileobj = open(script)
tmpl = MarkupTemplate(tmpl_fileobj, script)
tmpl_fileobj.close()
if not output_file:
# filter
context.push({'input':XMLParser(StringIO(doc))})
else:
# template
import time
from planet import config,feedparser
from planet.spider import filename
# gather a list of subscriptions, feeds
global subscriptions
feeds = []
sources = config.cache_sources_directory()
for sub in config.subscriptions():
data=feedparser.parse(filename(sources,sub))
data.feed.config = norm(dict(config.parser.items(sub)))
if data.feed.has_key('link'):
feeds.append((data.feed.config.get('name',''),data.feed))
subscriptions.append(norm(sub))
feeds.sort()
# annotate each entry
new_date_format = config.new_date_format()
vars = feedparser.parse(StringIO(doc))
vars.feeds = [value for name,value in feeds]
last_feed = None
last_date = None
for entry in vars.entries:
entry.source.config = find_config(config, entry.source)
# add new_feed and new_date fields
entry.new_feed = entry.source.id
entry.new_date = date = None
if entry.has_key('published_parsed'): date=entry.published_parsed
if entry.has_key('updated_parsed'): date=entry.updated_parsed
if date: entry.new_date = time.strftime(new_date_format, date)
# remove new_feed and new_date fields if not "new"
if entry.new_date == last_date:
entry.new_date = None
if entry.new_feed == last_feed:
entry.new_feed = None
else:
last_feed = entry.new_feed
elif entry.new_date:
last_date = entry.new_date
last_feed = None
# add streams for all text constructs
for key in entry.keys():
if key.endswith("_detail") and entry[key].has_key('type') and \
entry[key].has_key('value'):
streamify(entry[key],entry.source.planet_bozo)
if entry.has_key('content'):
for content in entry.content:
streamify(content,entry.source.planet_bozo)
# add cumulative feed information to the Genshi context
vars.feed.config = dict(config.parser.items('Planet',True))
context.push(vars)
# apply template
output=tmpl.generate(context).render('xml')
if output_file:
out_file = open(output_file,'w')
out_file.write(output)
out_file.close()
else:
return output