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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def view(route: str):
 """ Retrieves the contents of the file specified by the view route if it exists. """

    project = cauldron.project.get_internal_project()
    results_path = project.results_path if project else None
    if not project or not results_path:
        return '', 204

    path = os.path.join(results_path, route)
    if not os.path.exists(path):
        return '', 204

    return flask.send_file(
        path,
        mimetype=mimetypes.guess_type(path)[0],
        cache_timeout=-1
    )