Simplify CORS middleware configuration

def setup_middleware(app):

    app.middleware_stack = None  # reset current middleware to allow modifying user provided list

    app.add_middleware(GZipMiddleware, minimum_size=1000)

    if cmd_opts.cors_allow_origins and cmd_opts.cors_allow_origins_regex:

        app.add_middleware(CORSMiddleware, allow_origins=cmd_opts.cors_allow_origins.split(','), allow_origin_regex=cmd_opts.cors_allow_origins_regex, allow_methods=['*'], allow_credentials=True, allow_headers=['*'])

    elif cmd_opts.cors_allow_origins:

        app.add_middleware(CORSMiddleware, allow_origins=cmd_opts.cors_allow_origins.split(','), allow_methods=['*'], allow_credentials=True, allow_headers=['*'])

    elif cmd_opts.cors_allow_origins_regex:

        app.add_middleware(CORSMiddleware, allow_origin_regex=cmd_opts.cors_allow_origins_regex, allow_methods=['*'], allow_credentials=True, allow_headers=['*'])

    configure_cors_middleware(app)

    app.build_middleware_stack()  # rebuild middleware stack on-the-fly

def configure_cors_middleware(app):

    cors_options = {

        "allow_methods": ["*"],

        "allow_headers": ["*"],

        "allow_credentials": True,

    }

    if cmd_opts.cors_allow_origins:

        cors_options["allow_origins"] = cmd_opts.cors_allow_origins.split(',')

    if cmd_opts.cors_allow_origins_regex:

        cors_options["allow_origin_regex"] = cmd_opts.cors_allow_origins_regex

    app.add_middleware(CORSMiddleware, **cors_options)

def create_api(app):

    from modules.api.api import Api

    api = Api(app, queue_lock)