<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 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()