#!/usr/bin/env python

import sys
import cgi
import cgitb
import urllib
import string
from xml.dom import minidom, Node

cgitb.enable()

def parse(url): 
	result = urllib.urlopen(url) 
	if result is not None:
		str = result.read()
		if (str.startswith('<')):
			return minidom.parseString(str)
		else:
			raise ValueError(str)

def showNode(node):
    if node.nodeType == Node.ELEMENT_NODE:
        print 'Element name: %s' % node.nodeName
        for (name, value) in node.attributes.items():
            print '    Attr -- Name: %s  Value: %s' % (name, value)
        if node.attributes.get('ID') is not None:
            print '    ID: %s' % node.attributes.get('ID').value

def getText(nodelist):
	rc = ""
	for node in nodelist:
 		if node.nodeType == node.TEXT_NODE:
			rc = rc + node.data
	return rc

# http://lh5.ggpht.com/_Ny16LsAeZGk/Sz-CHos_cLI/AAAAAAAABnw/zQcD6apDKMs/dsc_04141.JPG
#   to
# http://lh5.ggpht.com/_Ny16LsAeZGk/Sz-CHos_cLI/AAAAAAAABnw/zQcD6apDKMs/s800/dsc_04141.JPG
def to800(url):
	x = url.split('/')
	fn = x[-1]
	x[-1] = 's800'
	x.append(fn)
	return string.join(x, '/')

def fn(url):
	x = url.split('/')
	return x[-1]

def main():
	if len(sys.argv) > 1:
		feed = sys.argv[1]
	else:
		form = cgi.FieldStorage()
		feed = form["f"].value

	doc = parse(feed)
	node = doc.documentElement
	print "Content-type: text/xml"
	print
	for i in node.getElementsByTagName("channel")[0].getElementsByTagName("item"):
		caption = None
		for j in i.childNodes:
			if j.nodeName == "title":
				caption = getText(j.childNodes)
		mg = i.getElementsByTagName("media:group")[0]
		mc = i.getElementsByTagName("media:content")[0]
		url = mc.attributes["url"].value
		if (caption != fn(url)):
			url = to800(url)
			nella = 'http://nella.org/jra/geek/captionate/caption.cgi?'
			#q = { "i": url, "c": caption.encode('latin_1') }
			q = { "i": url, "c": caption }
			url = nella + urllib.urlencode(q)
			mc.attributes["url"].value = url.encode('utf-8')
	doc.writexml(sys.stdout, encoding = 'utf-8')

if __name__ == '__main__':
    main()