[Jsign-commits] CVS: pyweb news.py,NONE,1.1

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Update of /cvsroot/jsign/pyweb
In directory usw-pr-cvs1:/tmp/cvs-serv22456

Added Files:
	news.py 
Log Message:

Utilidad para conectarse al "slashdot" u otro servidor que ofrezca noticias en 
format RDF, y generar una página HTML con el resultado del parsing.

--- NEW FILE: news.py ---
from xml.sax import *
import urllib, sys

class RDFElement:
   def __init__(self):
      self.title = ""
      self.link = ""

class Channel(RDFElement):
   def __init__(self):
      self.desc = ""

class Image(RDFElement):
   def __init__(self):
      self.url = ""

class NewsParser(ContentHandler):
   def __init__(self):
       self.nextTag = ""
       self.endOf = ""
       self.news = []
       self.actual = None

   def startElement(self, name, attributes):
       self.nextTag = name 

       if name == 'channel':
          self.actual = Channel()
       elif name == 'item':
          self.actual = RDFElement()
       elif name == 'image':
          self.actual = Image()

   def endElement(self,name):
       self.endOf = name
       self.nextTag = ""

       if name in ['channel','image','item']:
          self.news.append(self.actual)

   def characters(self, content):
       if self.nextTag:
          if self.nextTag == 'title':
             self.actual.title = content 
          elif self.nextTag == 'link':
             self.actual.link = content 
          elif self.nextTag == 'description':
             self.actual.desc = content 
          elif self.nextTag == 'url':
             self.actual.url = content 

   def endDocument(self):
       sys.stdout.write('<html>' + '\n')
       sys.stdout.write('  <body>' + '\n')

       for item in self.news:
           if isinstance(item, Channel):
              sys.stdout.write('    <h1>Bienvenido al canal <a href="' + item.link + '">' + item.title + '</a><br>' + '\n')
              sys.stdout.write('    ' + item.desc + '<br>\n'); 
           elif isinstance(item, Image):
              sys.stdout.write('    <a href="' + item.link + '">' + item.title + '</a>' + '\n')
              sys.stdout.write('    <img src="' + item.url + '">' + '\n')
           else:
              sys.stdout.write('    Nuevo articulo<br>' + '\n')
              sys.stdout.write('    <a href="' + item.link + '">' + item.title + '</a>' + '\n')

       sys.stdout.write('  </body>' + '\n')
       sys.stdout.write('</html>' + '\n')

if __name__ == "__main__":
   url = 'http://slashdot.org/slashdot.rdf'
   parse(urllib.urlopen(url), NewsParser()) 