def execute_request(content):
    try:
        code = content["code"]
    except KeyError:
        return execute_reply_internal_error(
            'Malformed message: content object missing "code"', sys.exc_info()
        )

    try:
        nodes = parse_code_into_nodes(code)
    except SyntaxError:
        exc_type, exc_value, tb = sys.exc_info()
        return execute_reply_error(exc_type, exc_value, None)

    result = None

    try:
        for node in nodes:
            result = node.execute()
    except UnknownMagic:
        exc_type, exc_value, tb = sys.exc_info()
        return execute_reply_error(exc_type, exc_value, None)
    except ExecutionError as e:
        return execute_reply_error(*e.exc_info)

    if result is None:
        result = {}

-   stdout = sys.stdout.getvalue()
-   stderr = sys.stderr.getvalue()
-
-   clearOutputs()

    output = result.pop("text/plain", "")

-   if stdout:
-       output += stdout
-
-   if stderr:
-       output += stderr

    output = output.rstrip()

    # Only add the output if it exists, or if there are no other mimetypes in the result.
    if output or not result:
        result["text/plain"] = output.rstrip()

    return execute_reply_ok(result)