old_contents: #!/usr/bin/env python
  #
  # Copyright 2007 Google Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  
  import wsgiref.handlers
  import yaml
  from cgi import escape
  from urllib import quote
  from google.appengine.ext import webapp
  from google.appengine.api.urlfetch import fetch
  
  class GistRedirectHandler(webapp.RequestHandler):
    def get(self, id):
      self.redirect('/%s/' % id)
  
  class GistViewHandler(webapp.RequestHandler):
    def get(self, id):
      raw = fetch('http://gist.github.com/api/v1/yaml/%s' % id)
      meta = yaml.load(raw.content)['gists'][0]
      owner = meta[':owner'] or ""
      description = meta[':description'] or ""
  
      self.response.out.write("""
  <!DOCTYPE html>
  <html>
    <head>
      <title>bl.ocks.org - %s</title>
      <style type="text/css">
  
  @import url("/style.css");
  
      </style>
    </head>
    <body>
      <div class="body">
        <a href="/" class="about right">What&rsquo;s all this then?</a>
        <h1>block <a href="http://gist.github.com/%s">#%s</a></h1>
        <h2>
          <span class="description">%s</span>
          by <a href="http://github.com/%s" class="owner">%s</a>
        </h2>
        <iframe src=\"/d/%s/\"></iframe>
  """ % (id, id, id, escape(description), quote(owner), escape(owner), id))
      for f in meta[':files']:
        self.response.out.write('<script src="http://gist.github.com/%s.js?file=%s"></script>' % (id, f))
      self.response.out.write("""
        <a href="/" class="about">about bl.ocks.org</a>
      </div>
    </body>
  </html>
  """)
  
  class GistDataHandler(webapp.RequestHandler):
    def get(self, id, file):
      if not file:
        file = 'index.html'
      raw = fetch('http://gist.github.com/raw/%s/%s' % (id, quote(file)))
      self.response.out.write(raw.content)
  
  def main():
    application = webapp.WSGIApplication([
        ('/([0-9]+)', GistRedirectHandler),
        ('/([0-9]+)/', GistViewHandler),
        ('/d/([0-9]+)/(.*)', GistDataHandler)
        ], debug=True)
    wsgiref.handlers.CGIHandler().run(application)
  
  if __name__ == '__main__':
    main()
  
new_contents: #!/usr/bin/env python
  #
  # Copyright 2007 Google Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  #
  
  import wsgiref.handlers
  import yaml
  from cgi import escape
  from urllib import quote
  from google.appengine.ext import webapp
  from google.appengine.api.urlfetch import fetch
  
  class GistRedirectHandler(webapp.RequestHandler):
    def get(self, id):
      self.redirect('/%s/' % id)
  
  class GistViewHandler(webapp.RequestHandler):
    def get(self, id):
      raw = fetch('http://gist.github.com/api/v1/yaml/%s' % id)
      meta = yaml.load(raw.content)['gists'][0]
      owner = meta[':owner'] or ""
      description = meta[':description'] or ""
  
      self.response.out.write("""
  <!DOCTYPE html>
  <html>
    <head>
      <title>bl.ocks.org - %s</title>
      <style type="text/css">
  
  @import url("/style.css");
  
      </style>
    </head>
    <body>
      <div class="body">
        <a href="/" class="about right">What&rsquo;s all this then?</a>
        <h1>block <a href="http://gist.github.com/%s">#%s</a></h1>
        <h2>
          <span class="description">%s</span>
          by <a href="http://github.com/%s" class="owner">%s</a>
        </h2>
        <iframe marginwidth="0" marginheight="0" scrolling="no" src=\"/d/%s/\"></iframe>
  """ % (id, id, id, escape(description), quote(owner), escape(owner), id))
      for f in meta[':files']:
        self.response.out.write('<script src="http://gist.github.com/%s.js?file=%s"></script>' % (id, f))
      self.response.out.write("""
        <a href="/" class="about">about bl.ocks.org</a>
      </div>
    </body>
  </html>
  """)
  
  class GistDataHandler(webapp.RequestHandler):
    def get(self, id, file):
      if not file:
        file = 'index.html'
      raw = fetch('http://gist.github.com/raw/%s/%s' % (id, quote(file)))
      self.response.out.write(raw.content)
  
  def main():
    application = webapp.WSGIApplication([
        ('/([0-9]+)', GistRedirectHandler),
        ('/([0-9]+)/', GistViewHandler),
        ('/d/([0-9]+)/(.*)', GistDataHandler)
        ], debug=True)
    wsgiref.handlers.CGIHandler().run(application)
  
  if __name__ == '__main__':
    main()
  
subject: Disable scrollbars and margin on iframe.