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"""
A demo that reads in an RSS XML document and emits an HTML file containing
a list of the individual items in the feed.
"""
import sys
import codecs
from xml.sax import make_parser, handler
# --- Templates
top = """\
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>%s</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<h1>%s</h1>
"""
bottom = """
</ul>
<hr>
<address>
Converted to HTML by rss2html.py.
</address>
</body>
</html>
"""
# --- The ContentHandler
class RSSHandler(handler.ContentHandler):
def __init__(self, out=sys.stdout):
handler.ContentHandler.__init__(self)
self._out = codecs.getwriter('utf-8')(out)
self._text = ""
self._parent = None
self._list_started = False
self._title = None
self._link = None
self._descr = ""
# ContentHandler methods
def startElement(self, name, attrs):
if name == "channel" or name == "image" or name == "item":
self._parent = name
self._text = ""
def endElement(self, name):
if self._parent == "channel":
if name == "title":
self._out.write(top % (self._text, self._text))
elif name == "description":
self._out.write("<p>%s</p>\n" % self._text)
elif self._parent == "item":
if name == "title":
self._title = self._text
elif name == "link":
self._link = self._text
elif name == "description":
self._descr = self._text
elif name == "item":
if not self._list_started:
self._out.write("<ul>\n")
self._list_started = True
self._out.write(' <li><a href="%s">%s</a> %s\n' %
(self._link, self._title, self._descr))
self._title = None
self._link = None
self._descr = ""
if name == "rss":
self._out.write(bottom)
def characters(self, content):
self._text = self._text + content
# --- Main program
if __name__ == '__main__':
parser = make_parser()
parser.setContentHandler(RSSHandler())
parser.parse(sys.argv[1])
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