WSGI Sanitizer

gistfile1.py

import webapp2
import html5lib
from html5lib import sanitizer,treebuilders,treewalkers
from html5lib.serializer.htmlserializer import HTMLSerializer

class MainPage(webapp2.RequestHandler):
    def post(self):
        self.response.headers['Content-Type'] = 'text/plain'
        TREE = 'lxml'
        input_data = self.request.get('content')
        parser = html5lib.HTMLParser(
            tree=html5lib.treebuilders.getTreeBuilder(TREE),
            tokenizer=sanitizer.HTMLSanitizer)
        output_tree = parser.parse(input_data)
        walker = treewalkers.getTreeWalker(TREE)
        output_stream = walker(output_tree)
        serializer = HTMLSerializer(
            quote_attr_values=True,
            omit_optional_tags=True)
        output_data = serializer.render(output_stream)
        self.response.out.write(output_data)

mappings = [('/', MainPage)]
app = webapp2.WSGIApplication(mappings)