docs: def do_GET(self):
          """Override inherited do_GET method.
  
          Include logic for returning a http manifest when the URL ends with
          "http_manifest.json".
          """
          if self.path.endswith("http_manifest.json"):
              try:
                  manifest = self.generate_http_manifest()
                  self.send_response(200)
                  self.end_headers()
                  self.wfile.write(manifest)
              except dtoolcore.DtoolCoreTypeError:
                  self.send_response(400)
                  self.end_headers()
  
          else:
              super(DtoolHTTPRequestHandler, self).do_GET()