Module slack_bolt.app.app

Classes

class App (*, logger: Optional[logging.Logger] = None, name: Optional[str] = None, process_before_response: bool = False, raise_error_for_unhandled_request: bool = False, signing_secret: Optional[str] = None, token: Optional[str] = None, token_verification_enabled: bool = True, client: Optional[slack_sdk.web.client.WebClient] = None, before_authorize: Union[Middleware, Callable[..., Any], ForwardRef(None)] = None, authorize: Optional[Callable[..., AuthorizeResult]] = None, user_facing_authorize_error_message: Optional[str] = None, installation_store: Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore] = None, installation_store_bot_only: Optional[bool] = None, request_verification_enabled: bool = True, ignoring_self_events_enabled: bool = True, ignoring_self_assistant_message_events_enabled: bool = True, ssl_check_enabled: bool = True, url_verification_enabled: bool = True, attaching_function_token_enabled: bool = True, oauth_settings: Optional[OAuthSettings] = None, oauth_flow: Optional[OAuthFlow] = None, verification_token: Optional[str] = None, listener_executor: Optional[concurrent.futures._base.Executor] = None, assistant_thread_context_store: Optional[AssistantThreadContextStore] = None)

Bolt App that provides functionalities to register middleware/listeners.

import os
from slack_bolt import App

# Initializes your app with your bot token and signing secret
app = App(
    token=os.environ.get("SLACK_BOT_TOKEN"),
    signing_secret=os.environ.get("SLACK_SIGNING_SECRET")
)

# Listens to incoming messages that contain "hello"
@app.message("hello")
def message_hello(message, say):
    # say() sends a message to the channel where the event was triggered
    say(f"Hey there <@{message['user']}>!")

# Start your app
if __name__ == "__main__":
    app.start(port=int(os.environ.get("PORT", 3000)))

Refer to https://slack.dev/bolt-python/tutorial/getting-started for details.

If you would like to build an OAuth app for enabling the app to run with multiple workspaces, refer to https://slack.dev/bolt-python/concepts#authenticating-oauth to learn how to configure the app.

Args

logger
The custom logger that can be used in this app.
name
The application name that will be used in logging. If absent, the source file name will be used.
process_before_response
True if this app runs on Function as a Service. (Default: False)
raise_error_for_unhandled_request
True if you want to raise exceptions for unhandled requests and use @app.error listeners instead of the built-in handler, which pints warning logs and returns 404 to Slack (Default: False)
signing_secret
The Signing Secret value used for verifying requests from Slack.
token
The bot/user access token required only for single-workspace app.
token_verification_enabled
Verifies the validity of the given token if True.
client
The singleton slack_sdk.WebClient instance for this app.
before_authorize
A global middleware that can be executed right before authorize function
authorize
The function to authorize an incoming request from Slack by checking if there is a team/user in the installation data.
user_facing_authorize_error_message
The user-facing error message to display when the app is installed but the installation is not managed by this app's installation store
installation_store
The module offering save/find operations of installation data
installation_store_bot_only
Use InstallationStore#find_bot() if True (Default: False)
request_verification_enabled
False if you would like to disable the built-in middleware (Default: True). RequestVerification is a built-in middleware that verifies the signature in HTTP Mode requests. Make sure if it's safe enough when you turn a built-in middleware off. We strongly recommend using RequestVerification for better security. If you have a proxy that verifies request signature in front of the Bolt app, it's totally fine to disable RequestVerification to avoid duplication of work. Don't turn it off just for easiness of development.
ignoring_self_events_enabled
False if you would like to disable the built-in middleware (Default: True). IgnoringSelfEvents is a built-in middleware that enables Bolt apps to easily skip the events generated by this app's bot user (this is useful for avoiding code error causing an infinite loop).
ignoring_self_assistant_message_events_enabled
False if you would like to disable the built-in middleware. IgnoringSelfEvents for this app's bot user message events within an assistant thread This is useful for avoiding code error causing an infinite loop; Default: True
url_verification_enabled
False if you would like to disable the built-in middleware (Default: True). UrlVerification is a built-in middleware that handles url_verification requests that verify the endpoint for Events API in HTTP Mode requests.
attaching_function_token_enabled
False if you would like to disable the built-in middleware (Default: True). AttachingFunctionToken is a built-in middleware that injects the just-in-time workflow-execution tokens when your app receives function_executed or interactivity events scoped to a custom step.
ssl_check_enabled
bool = False if you would like to disable the built-in middleware (Default: True). SslCheck is a built-in middleware that handles ssl_check requests from Slack.
oauth_settings
The settings related to Slack app installation flow (OAuth flow)
oauth_flow
Instantiated OAuthFlow. This is always prioritized over oauth_settings.
verification_token
Deprecated verification mechanism. This can be used only for ssl_check requests.
listener_executor
Custom executor to run background tasks. If absent, the default ThreadPoolExecutor will be used.
assistant_thread_context_store
Custom AssistantThreadContext store (Default: the built-in implementation, which uses a parent message's metadata to store the latest context)
Expand source code
class App:
    def __init__(
        self,
        *,
        logger: Optional[logging.Logger] = None,
        # Used in logger
        name: Optional[str] = None,
        # Set True when you run this app on a FaaS platform
        process_before_response: bool = False,
        # Set True if you want to handle an unhandled request as an exception
        raise_error_for_unhandled_request: bool = False,
        # Basic Information > Credentials > Signing Secret
        signing_secret: Optional[str] = None,
        # for single-workspace apps
        token: Optional[str] = None,
        token_verification_enabled: bool = True,
        client: Optional[WebClient] = None,
        # for multi-workspace apps
        before_authorize: Optional[Union[Middleware, Callable[..., Any]]] = None,
        authorize: Optional[Callable[..., AuthorizeResult]] = None,
        user_facing_authorize_error_message: Optional[str] = None,
        installation_store: Optional[InstallationStore] = None,
        # for either only bot scope usage or v1.0.x compatibility
        installation_store_bot_only: Optional[bool] = None,
        # for customizing the built-in middleware
        request_verification_enabled: bool = True,
        ignoring_self_events_enabled: bool = True,
        ignoring_self_assistant_message_events_enabled: bool = True,
        ssl_check_enabled: bool = True,
        url_verification_enabled: bool = True,
        attaching_function_token_enabled: bool = True,
        # for the OAuth flow
        oauth_settings: Optional[OAuthSettings] = None,
        oauth_flow: Optional[OAuthFlow] = None,
        # No need to set (the value is used only in response to ssl_check requests)
        verification_token: Optional[str] = None,
        # Set this one only when you want to customize the executor
        listener_executor: Optional[Executor] = None,
        # for AI Agents & Assistants
        assistant_thread_context_store: Optional[AssistantThreadContextStore] = None,
    ):
        """Bolt App that provides functionalities to register middleware/listeners.

            import os
            from slack_bolt import App

            # Initializes your app with your bot token and signing secret
            app = App(
                token=os.environ.get("SLACK_BOT_TOKEN"),
                signing_secret=os.environ.get("SLACK_SIGNING_SECRET")
            )

            # Listens to incoming messages that contain "hello"
            @app.message("hello")
            def message_hello(message, say):
                # say() sends a message to the channel where the event was triggered
                say(f"Hey there <@{message['user']}>!")

            # Start your app
            if __name__ == "__main__":
                app.start(port=int(os.environ.get("PORT", 3000)))

        Refer to https://slack.dev/bolt-python/tutorial/getting-started for details.

        If you would like to build an OAuth app for enabling the app to run with multiple workspaces,
        refer to https://slack.dev/bolt-python/concepts#authenticating-oauth to learn how to configure the app.

        Args:
            logger: The custom logger that can be used in this app.
            name: The application name that will be used in logging. If absent, the source file name will be used.
            process_before_response: True if this app runs on Function as a Service. (Default: False)
            raise_error_for_unhandled_request: True if you want to raise exceptions for unhandled requests
                and use @app.error listeners instead of
                the built-in handler, which pints warning logs and returns 404 to Slack (Default: False)
            signing_secret: The Signing Secret value used for verifying requests from Slack.
            token: The bot/user access token required only for single-workspace app.
            token_verification_enabled: Verifies the validity of the given token if True.
            client: The singleton `slack_sdk.WebClient` instance for this app.
            before_authorize: A global middleware that can be executed right before authorize function
            authorize: The function to authorize an incoming request from Slack
                by checking if there is a team/user in the installation data.
            user_facing_authorize_error_message: The user-facing error message to display
                when the app is installed but the installation is not managed by this app's installation store
            installation_store: The module offering save/find operations of installation data
            installation_store_bot_only: Use `InstallationStore#find_bot()` if True (Default: False)
            request_verification_enabled: False if you would like to disable the built-in middleware (Default: True).
                `RequestVerification` is a built-in middleware that verifies the signature in HTTP Mode requests.
                Make sure if it's safe enough when you turn a built-in middleware off.
                We strongly recommend using RequestVerification for better security.
                If you have a proxy that verifies request signature in front of the Bolt app,
                it's totally fine to disable RequestVerification to avoid duplication of work.
                Don't turn it off just for easiness of development.
            ignoring_self_events_enabled: False if you would like to disable the built-in middleware (Default: True).
                `IgnoringSelfEvents` is a built-in middleware that enables Bolt apps to easily skip the events
                generated by this app's bot user (this is useful for avoiding code error causing an infinite loop).
            ignoring_self_assistant_message_events_enabled: False if you would like to disable the built-in middleware.
                `IgnoringSelfEvents` for this app's bot user message events within an assistant thread
                This is useful for avoiding code error causing an infinite loop; Default: True
            url_verification_enabled: False if you would like to disable the built-in middleware (Default: True).
                `UrlVerification` is a built-in middleware that handles url_verification requests
                that verify the endpoint for Events API in HTTP Mode requests.
            attaching_function_token_enabled: False if you would like to disable the built-in middleware (Default: True).
                `AttachingFunctionToken` is a built-in middleware that injects the just-in-time workflow-execution tokens
                when your app receives `function_executed` or interactivity events scoped to a custom step.
            ssl_check_enabled: bool = False if you would like to disable the built-in middleware (Default: True).
                `SslCheck` is a built-in middleware that handles ssl_check requests from Slack.
            oauth_settings: The settings related to Slack app installation flow (OAuth flow)
            oauth_flow: Instantiated `slack_bolt.oauth.OAuthFlow`. This is always prioritized over oauth_settings.
            verification_token: Deprecated verification mechanism. This can be used only for ssl_check requests.
            listener_executor: Custom executor to run background tasks. If absent, the default `ThreadPoolExecutor` will
                be used.
            assistant_thread_context_store: Custom AssistantThreadContext store (Default: the built-in implementation,
                which uses a parent message's metadata to store the latest context)
        """
        if signing_secret is None:
            signing_secret = os.environ.get("SLACK_SIGNING_SECRET", "")
        token = token or os.environ.get("SLACK_BOT_TOKEN")

        self._name: str = name or inspect.stack()[1].filename.split(os.path.sep)[-1]
        self._signing_secret: str = signing_secret

        self._verification_token: Optional[str] = verification_token or os.environ.get("SLACK_VERIFICATION_TOKEN", None)
        # If a logger is explicitly passed when initializing, the logger works as the base logger.
        # The base logger's logging settings will be propagated to all the loggers created by bolt-python.
        self._base_logger = logger
        # The framework logger is supposed to be used for the internal logging.
        # Also, it's accessible via `app.logger` as the app's singleton logger.
        self._framework_logger = logger or get_bolt_logger(App)
        self._raise_error_for_unhandled_request = raise_error_for_unhandled_request

        self._token: Optional[str] = token

        if client is not None:
            if not isinstance(client, WebClient):
                raise BoltError(error_client_invalid_type())
            self._client = client
            self._token = client.token
            if token is not None:
                self._framework_logger.warning(warning_client_prioritized_and_token_skipped())
        else:
            self._client = create_web_client(
                # NOTE: the token here can be None
                token=token,
                logger=self._framework_logger,
            )

        # --------------------------------------
        # Authorize & OAuthFlow initialization
        # --------------------------------------

        self._before_authorize: Optional[Middleware] = None
        if before_authorize is not None:
            if callable(before_authorize):
                self._before_authorize = CustomMiddleware(
                    app_name=self._name,
                    func=before_authorize,
                    base_logger=self._framework_logger,
                )
            elif isinstance(before_authorize, Middleware):
                self._before_authorize = before_authorize

        self._authorize: Optional[Authorize] = None
        if authorize is not None:
            if isinstance(authorize, Authorize):
                # As long as an advanced developer understands what they're doing,
                # bolt-python should not prevent customizing authorize middleware
                self._authorize = authorize
            else:
                if oauth_settings is not None or oauth_flow is not None:
                    # If the given authorize is a simple function,
                    # it does not work along with installation_store.
                    raise BoltError(error_authorize_conflicts())
                self._authorize = CallableAuthorize(logger=self._framework_logger, func=authorize)

        self._installation_store: Optional[InstallationStore] = installation_store
        if self._installation_store is not None and self._authorize is None:
            settings = oauth_flow.settings if oauth_flow is not None else oauth_settings
            self._authorize = InstallationStoreAuthorize(
                installation_store=self._installation_store,
                client_id=settings.client_id if settings is not None else None,
                client_secret=settings.client_secret if settings is not None else None,
                logger=self._framework_logger,
                bot_only=installation_store_bot_only or False,
                client=self._client,  # for proxy use cases etc.
                user_token_resolution=(settings.user_token_resolution if settings is not None else "authed_user"),
            )

        self._oauth_flow: Optional[OAuthFlow] = None

        if (
            oauth_settings is None
            and os.environ.get("SLACK_CLIENT_ID") is not None
            and os.environ.get("SLACK_CLIENT_SECRET") is not None
        ):
            # initialize with the default settings
            oauth_settings = OAuthSettings()

            if oauth_flow is None and installation_store is None:
                # show info-level log for avoiding confusions
                self._framework_logger.info(info_default_oauth_settings_loaded())

        if oauth_flow is not None:
            self._oauth_flow = oauth_flow
            installation_store = select_consistent_installation_store(
                client_id=self._oauth_flow.client_id,
                app_store=self._installation_store,
                oauth_flow_store=self._oauth_flow.settings.installation_store,
                logger=self._framework_logger,
            )
            self._installation_store = installation_store
            if installation_store is not None:
                self._oauth_flow.settings.installation_store = installation_store

            if self._oauth_flow._client is None:
                self._oauth_flow._client = self._client
            if self._authorize is None:
                self._authorize = self._oauth_flow.settings.authorize
        elif oauth_settings is not None:
            installation_store = select_consistent_installation_store(
                client_id=oauth_settings.client_id,
                app_store=self._installation_store,
                oauth_flow_store=oauth_settings.installation_store,
                logger=self._framework_logger,
            )
            self._installation_store = installation_store
            if installation_store is not None:
                oauth_settings.installation_store = installation_store
            self._oauth_flow = OAuthFlow(client=self.client, logger=self.logger, settings=oauth_settings)
            if self._authorize is None:
                self._authorize = self._oauth_flow.settings.authorize
            self._authorize.token_rotation_expiration_minutes = oauth_settings.token_rotation_expiration_minutes  # type: ignore[attr-defined] # noqa: E501

        if (self._installation_store is not None or self._authorize is not None) and self._token is not None:
            self._token = None
            self._framework_logger.warning(warning_token_skipped())

        # after setting bot_only here, __init__ cannot replace authorize function
        if installation_store_bot_only is not None and self._oauth_flow is not None:
            app_bot_only = installation_store_bot_only or False
            oauth_flow_bot_only = self._oauth_flow.settings.installation_store_bot_only
            if app_bot_only != oauth_flow_bot_only:
                self.logger.warning(warning_bot_only_conflicts())
                self._oauth_flow.settings.installation_store_bot_only = app_bot_only
                self._authorize.bot_only = app_bot_only  # type: ignore[union-attr]

        self._tokens_revocation_listeners: Optional[TokenRevocationListeners] = None
        if self._installation_store is not None:
            self._tokens_revocation_listeners = TokenRevocationListeners(self._installation_store)

        # --------------------------------------
        # Middleware Initialization
        # --------------------------------------

        self._middleware_list: List[Middleware] = []
        self._listeners: List[Listener] = []

        if listener_executor is None:
            listener_executor = ThreadPoolExecutor(max_workers=5)

        self._assistant_thread_context_store = assistant_thread_context_store

        self._process_before_response = process_before_response
        self._listener_runner = ThreadListenerRunner(
            logger=self._framework_logger,
            process_before_response=process_before_response,
            listener_error_handler=DefaultListenerErrorHandler(logger=self._framework_logger),
            listener_start_handler=DefaultListenerStartHandler(logger=self._framework_logger),
            listener_completion_handler=DefaultListenerCompletionHandler(logger=self._framework_logger),
            listener_executor=listener_executor,
            lazy_listener_runner=ThreadLazyListenerRunner(
                logger=self._framework_logger,
                executor=listener_executor,
            ),
        )
        self._middleware_error_handler: MiddlewareErrorHandler = DefaultMiddlewareErrorHandler(
            logger=self._framework_logger,
        )

        self._init_middleware_list_done = False
        self._init_middleware_list(
            token_verification_enabled=token_verification_enabled,
            request_verification_enabled=request_verification_enabled,
            ignoring_self_events_enabled=ignoring_self_events_enabled,
            ignoring_self_assistant_message_events_enabled=ignoring_self_assistant_message_events_enabled,
            ssl_check_enabled=ssl_check_enabled,
            url_verification_enabled=url_verification_enabled,
            attaching_function_token_enabled=attaching_function_token_enabled,
            user_facing_authorize_error_message=user_facing_authorize_error_message,
        )

    def _init_middleware_list(
        self,
        token_verification_enabled: bool = True,
        request_verification_enabled: bool = True,
        ignoring_self_events_enabled: bool = True,
        ignoring_self_assistant_message_events_enabled: bool = True,
        ssl_check_enabled: bool = True,
        url_verification_enabled: bool = True,
        attaching_function_token_enabled: bool = True,
        user_facing_authorize_error_message: Optional[str] = None,
    ):
        if self._init_middleware_list_done:
            return
        if ssl_check_enabled is True:
            self._middleware_list.append(
                SslCheck(
                    verification_token=self._verification_token,
                    base_logger=self._base_logger,
                )
            )
        if request_verification_enabled is True:
            self._middleware_list.append(RequestVerification(self._signing_secret, base_logger=self._base_logger))

        if self._before_authorize is not None:
            self._middleware_list.append(self._before_authorize)

        # As authorize is required for making a Bolt app function, we don't offer the flag to disable this
        if self._oauth_flow is None:
            if self._token is not None:
                try:
                    auth_test_result = None
                    if token_verification_enabled:
                        # This API call is for eagerly validating the token
                        auth_test_result = self._client.auth_test(token=self._token)
                    self._middleware_list.append(
                        SingleTeamAuthorization(
                            auth_test_result=auth_test_result,
                            base_logger=self._base_logger,
                            user_facing_authorize_error_message=user_facing_authorize_error_message,
                        )
                    )
                except SlackApiError as err:
                    raise BoltError(error_auth_test_failure(err.response))
            elif self._authorize is not None:
                self._middleware_list.append(
                    MultiTeamsAuthorization(
                        authorize=self._authorize,
                        base_logger=self._base_logger,
                        user_facing_authorize_error_message=user_facing_authorize_error_message,
                    )
                )
            else:
                raise BoltError(error_token_required())
        elif self._authorize is not None:
            self._middleware_list.append(
                MultiTeamsAuthorization(
                    authorize=self._authorize,
                    base_logger=self._base_logger,
                    user_token_resolution=self._oauth_flow.settings.user_token_resolution,
                    user_facing_authorize_error_message=user_facing_authorize_error_message,
                )
            )
        else:
            raise BoltError(error_oauth_flow_or_authorize_required())

        if ignoring_self_events_enabled is True:
            self._middleware_list.append(
                IgnoringSelfEvents(
                    base_logger=self._base_logger,
                    ignoring_self_assistant_message_events_enabled=ignoring_self_assistant_message_events_enabled,
                )
            )
        if url_verification_enabled is True:
            self._middleware_list.append(UrlVerification(base_logger=self._base_logger))
        if attaching_function_token_enabled is True:
            self._middleware_list.append(AttachingFunctionToken())
        self._init_middleware_list_done = True

    # -------------------------
    # accessors

    @property
    def name(self) -> str:
        """The name of this app (default: the filename)"""
        return self._name

    @property
    def oauth_flow(self) -> Optional[OAuthFlow]:
        """Configured `OAuthFlow` object if exists."""
        return self._oauth_flow

    @property
    def logger(self) -> logging.Logger:
        """The logger this app uses."""
        return self._framework_logger

    @property
    def client(self) -> WebClient:
        """The singleton `slack_sdk.WebClient` instance in this app."""
        return self._client

    @property
    def installation_store(self) -> Optional[InstallationStore]:
        """The `slack_sdk.oauth.InstallationStore` that can be used in the `authorize` middleware."""
        return self._installation_store

    @property
    def listener_runner(self) -> ThreadListenerRunner:
        """The thread executor for asynchronously running listeners."""
        return self._listener_runner

    @property
    def process_before_response(self) -> bool:
        return self._process_before_response or False

    # -------------------------
    # standalone server

    def start(
        self,
        port: int = 3000,
        path: str = "/slack/events",
        http_server_logger_enabled: bool = True,
    ) -> None:
        """Starts a web server for local development.

            # With the default settings, `http://localhost:3000/slack/events`
            # is available for handling incoming requests from Slack
            app.start()

        This method internally starts a Web server process built with the `http.server` module.
        For production, consider using a production-ready WSGI server such as Gunicorn.

        Args:
            port: The port to listen on (Default: 3000)
            path: The path to handle request from Slack (Default: `/slack/events`)
            http_server_logger_enabled: The flag to enable http.server logging if True (Default: True)
        """
        self._development_server = SlackAppDevelopmentServer(
            port=port,
            path=path,
            app=self,
            oauth_flow=self.oauth_flow,
            http_server_logger_enabled=http_server_logger_enabled,
        )
        self._development_server.start()

    # -------------------------
    # main dispatcher

    def dispatch(self, req: BoltRequest) -> BoltResponse:
        """Applies all middleware and dispatches an incoming request from Slack to the right code path.

        Args:
            req: An incoming request from Slack

        Returns:
            The response generated by this Bolt app
        """
        starting_time = time.time()
        self._init_context(req)

        resp: Optional[BoltResponse] = BoltResponse(status=200, body="")
        middleware_state = {"next_called": False}

        def middleware_next():
            middleware_state["next_called"] = True

        try:
            for middleware in self._middleware_list:
                middleware_state["next_called"] = False
                if self._framework_logger.level <= logging.DEBUG:
                    self._framework_logger.debug(debug_applying_middleware(middleware.name))
                resp = middleware.process(req=req, resp=resp, next=middleware_next)  # type: ignore[arg-type]
                if not middleware_state["next_called"]:
                    if resp is None:
                        # next() method was not called without providing the response to return to Slack
                        # This should not be an intentional handling in usual use cases.
                        resp = BoltResponse(status=404, body={"error": "no next() calls in middleware"})
                        if self._raise_error_for_unhandled_request is True:
                            try:
                                raise BoltUnhandledRequestError(
                                    request=req,
                                    current_response=resp,
                                    last_global_middleware_name=middleware.name,
                                )
                            except BoltUnhandledRequestError as e:
                                self._listener_runner.listener_error_handler.handle(
                                    error=e,
                                    request=req,
                                    response=resp,
                                )
                            return resp
                        self._framework_logger.warning(warning_unhandled_by_global_middleware(middleware.name, req))
                        return resp
                    return resp

            for listener in self._listeners:
                listener_name = get_name_for_callable(listener.ack_function)
                self._framework_logger.debug(debug_checking_listener(listener_name))
                if listener.matches(req=req, resp=resp):  # type: ignore[arg-type]
                    # run all the middleware attached to this listener first
                    middleware_resp, next_was_not_called = listener.run_middleware(
                        req=req, resp=resp  # type: ignore[arg-type]
                    )
                    if next_was_not_called:
                        if middleware_resp is not None:
                            if self._framework_logger.level <= logging.DEBUG:
                                debug_message = debug_return_listener_middleware_response(
                                    listener_name,
                                    middleware_resp.status,
                                    middleware_resp.body,
                                    starting_time,
                                )
                                self._framework_logger.debug(debug_message)
                            return middleware_resp
                        # The last listener middleware didn't call next() method.
                        # This means the listener is not for this incoming request.
                        continue

                    if middleware_resp is not None:
                        resp = middleware_resp

                    self._framework_logger.debug(debug_running_listener(listener_name))
                    listener_response: Optional[BoltResponse] = self._listener_runner.run(
                        request=req,
                        response=resp,  # type: ignore[arg-type]
                        listener_name=listener_name,
                        listener=listener,
                    )
                    if listener_response is not None:
                        return listener_response

            if resp is None:
                resp = BoltResponse(status=404, body={"error": "unhandled request"})
            if self._raise_error_for_unhandled_request is True:
                try:
                    raise BoltUnhandledRequestError(
                        request=req,
                        current_response=resp,
                    )
                except BoltUnhandledRequestError as e:
                    self._listener_runner.listener_error_handler.handle(
                        error=e,
                        request=req,
                        response=resp,
                    )
                return resp
            return self._handle_unmatched_requests(req, resp)
        except Exception as error:
            resp = BoltResponse(status=500, body="")
            self._middleware_error_handler.handle(
                error=error,
                request=req,
                response=resp,
            )
            return resp

    def _handle_unmatched_requests(self, req: BoltRequest, resp: BoltResponse) -> BoltResponse:
        self._framework_logger.warning(warning_unhandled_request(req))
        return resp

    # -------------------------
    # middleware

    def use(self, *args) -> Optional[Callable]:
        """Registers a new global middleware to this app. This method can be used as either a decorator or a method.

        Refer to `App#middleware()` method's docstring for details."""
        return self.middleware(*args)

    def middleware(self, *args) -> Optional[Callable]:
        """Registers a new middleware to this app.
        This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.middleware
            def middleware_func(logger, body, next):
                logger.info(f"request body: {body}")
                next()

            # Pass a function to this method
            app.middleware(middleware_func)

        Refer to https://slack.dev/bolt-python/concepts#global-middleware for details.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            *args: A function that works as a global middleware.
        """
        if len(args) > 0:
            middleware_or_callable = args[0]
            if isinstance(middleware_or_callable, Middleware):
                middleware: Middleware = middleware_or_callable
                self._middleware_list.append(middleware)
                if isinstance(middleware, Assistant) and middleware.thread_context_store is not None:
                    self._assistant_thread_context_store = middleware.thread_context_store
            elif callable(middleware_or_callable):
                self._middleware_list.append(
                    CustomMiddleware(
                        app_name=self.name,
                        func=middleware_or_callable,
                        base_logger=self._base_logger,
                    )
                )
                return middleware_or_callable
            else:
                raise BoltError(f"Unexpected type for a middleware ({type(middleware_or_callable)})")
        return None

    # -------------------------
    # AI Agents & Assistants

    def assistant(self, assistant: Assistant) -> Optional[Callable]:
        return self.middleware(assistant)

    # -------------------------
    # Workflows: Steps from apps

    def step(
        self,
        callback_id: Union[str, Pattern, WorkflowStep, WorkflowStepBuilder],
        edit: Optional[Union[Callable[..., Optional[BoltResponse]], Listener, Sequence[Callable]]] = None,
        save: Optional[Union[Callable[..., Optional[BoltResponse]], Listener, Sequence[Callable]]] = None,
        execute: Optional[Union[Callable[..., Optional[BoltResponse]], Listener, Sequence[Callable]]] = None,
    ):
        """
        Deprecated:
            Steps from apps for legacy workflows are now deprecated.
            Use new custom steps: https://api.slack.com/automation/functions/custom-bolt

        Registers a new step from app listener.

        Unlike others, this method doesn't behave as a decorator.
        If you want to register a step from app by a decorator, use `WorkflowStepBuilder`'s methods.

            # Create a new WorkflowStep instance
            from slack_bolt.workflows.step import WorkflowStep
            ws = WorkflowStep(
                callback_id="add_task",
                edit=edit,
                save=save,
                execute=execute,
            )
            # Pass Step to set up listeners
            app.step(ws)

        Refer to https://api.slack.com/workflows/steps for details of steps from apps.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        For further information about WorkflowStep specific function arguments
        such as `configure`, `update`, `complete`, and `fail`,
        refer to `slack_bolt.workflows.step.utilities` API documents.

        Args:
            callback_id: The Callback ID for this step from app
            edit: The function for displaying a modal in the Workflow Builder
            save: The function for handling configuration in the Workflow Builder
            execute: The function for handling the step execution
        """
        warnings.warn(
            (
                "Steps from apps for legacy workflows are now deprecated. "
                "Use new custom steps: https://api.slack.com/automation/functions/custom-bolt"
            ),
            category=DeprecationWarning,
        )
        step = callback_id
        if isinstance(callback_id, (str, Pattern)):
            step = WorkflowStep(
                callback_id=callback_id,
                edit=edit,  # type: ignore[arg-type]
                save=save,  # type: ignore[arg-type]
                execute=execute,  # type: ignore[arg-type]
                base_logger=self._base_logger,
            )
        elif isinstance(step, WorkflowStepBuilder):
            step = step.build(base_logger=self._base_logger)
        elif not isinstance(step, WorkflowStep):
            raise BoltError(f"Invalid step object ({type(step)})")

        self.use(WorkflowStepMiddleware(step))

    # -------------------------
    # global error handler

    def error(self, func: Callable[..., Optional[BoltResponse]]) -> Callable[..., Optional[BoltResponse]]:
        """Updates the global error handler. This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.error
            def custom_error_handler(error, body, logger):
                logger.exception(f"Error: {error}")
                logger.info(f"Request body: {body}")

            # Pass a function to this method
            app.error(custom_error_handler)

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            func: The function that is supposed to be executed
                when getting an unhandled error in Bolt app.
        """
        self._listener_runner.listener_error_handler = CustomListenerErrorHandler(
            logger=self._framework_logger,
            func=func,
        )
        self._middleware_error_handler = CustomMiddlewareErrorHandler(
            logger=self._framework_logger,
            func=func,
        )
        return func

    # -------------------------
    # events

    def event(
        self,
        event: Union[
            str,
            Pattern,
            Dict[str, Optional[Union[str, Sequence[Optional[Union[str, Pattern]]]]]],
        ],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new event listener. This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.event("team_join")
            def ask_for_introduction(event, say):
                welcome_channel_id = "C12345"
                user_id = event["user"]
                text = f"Welcome to the team, <@{user_id}>! :tada: You can introduce yourself in this channel."
                say(text=text, channel=welcome_channel_id)

            # Pass a function to this method
            app.event("team_join")(ask_for_introduction)

        Refer to https://api.slack.com/apis/connections/events-api for details of Events API.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            event: The conditions that match a request payload.
                If you pass a dict for this, you can have type, subtype in the constraint.
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.event(event, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware, True)

        return __call__

    def message(
        self,
        keyword: Union[str, Pattern] = "",
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new message event listener. This method can be used as either a decorator or a method.
        Check the `App#event` method's docstring for details.

            # Use this method as a decorator
            @app.message(":wave:")
            def say_hello(message, say):
                user = message['user']
                say(f"Hi there, <@{user}>!")

            # Pass a function to this method
            app.message(":wave:")(say_hello)

        Refer to https://api.slack.com/events/message for details of `message` events.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            keyword: The keyword to match
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """
        matchers = list(matchers) if matchers else []
        middleware = list(middleware) if middleware else []

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            constraints = {
                "type": "message",
                "subtype": (
                    # In most cases, new message events come with no subtype.
                    None,
                    # As of Jan 2021, most bot messages no longer have the subtype bot_message.
                    # By contrast, messages posted using classic app's bot token still have the subtype.
                    "bot_message",
                    # If an end-user posts a message with "Also send to #channel" checked,
                    # the message event comes with this subtype.
                    "thread_broadcast",
                    # If an end-user posts a message with attached files,
                    # the message event comes with this subtype.
                    "file_share",
                ),
            }
            primary_matcher = builtin_matchers.message_event(
                keyword=keyword, constraints=constraints, base_logger=self._base_logger
            )
            middleware.insert(0, MessageListenerMatches(keyword))
            return self._register_listener(list(functions), primary_matcher, matchers, middleware, True)

        return __call__

    def function(
        self,
        callback_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
        auto_acknowledge: bool = True,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new Function listener.
        This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.function("reverse")
            def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
                try:
                    ack()
                    string_to_reverse = inputs["stringToReverse"]
                    complete(outputs={"reverseString": string_to_reverse[::-1]})
                except Exception as e:
                    fail(f"Cannot reverse string (error: {e})")
                    raise e

            # Pass a function to this method
            app.function("reverse")(reverse_string)

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            callback_id: The callback id to identify the function
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """

        matchers = list(matchers) if matchers else []
        middleware = list(middleware) if middleware else []

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.function_executed(callback_id=callback_id, base_logger=self._base_logger)
            return self._register_listener(functions, primary_matcher, matchers, middleware, auto_acknowledge)

        return __call__

    # -------------------------
    # slash commands

    def command(
        self,
        command: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new slash command listener.
        This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.command("/echo")
            def repeat_text(ack, say, command):
                # Acknowledge command request
                ack()
                say(f"{command['text']}")

            # Pass a function to this method
            app.command("/echo")(repeat_text)

        Refer to https://api.slack.com/interactivity/slash-commands for details of Slash Commands.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            command: The conditions that match a request payload
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.command(command, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    # -------------------------
    # shortcut

    def shortcut(
        self,
        constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new shortcut listener.
        This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.shortcut("open_modal")
            def open_modal(ack, body, client):
                # Acknowledge the command request
                ack()
                # Call views_open with the built-in client
                client.views_open(
                    # Pass a valid trigger_id within 3 seconds of receiving it
                    trigger_id=body["trigger_id"],
                    # View payload
                    view={ ... }
                )

            # Pass a function to this method
            app.shortcut("open_modal")(open_modal)

        Refer to https://api.slack.com/interactivity/shortcuts for details about Shortcuts.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            constraints: The conditions that match a request payload.
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.shortcut(constraints, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def global_shortcut(
        self,
        callback_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new global shortcut listener."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.global_shortcut(callback_id, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def message_shortcut(
        self,
        callback_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new message shortcut listener."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.message_shortcut(callback_id, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    # -------------------------
    # action

    def action(
        self,
        constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new action listener. This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.action("approve_button")
            def update_message(ack):
                ack()

            # Pass a function to this method
            app.action("approve_button")(update_message)

        * Refer to https://api.slack.com/reference/interaction-payloads/block-actions for actions in `blocks`.
        * Refer to https://api.slack.com/legacy/message-buttons for actions in `attachments`.
        * Refer to https://api.slack.com/dialogs for actions in dialogs.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            constraints: The conditions that match a request payload
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.action(constraints, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def block_action(
        self,
        constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `block_actions` action listener.
        Refer to https://api.slack.com/reference/interaction-payloads/block-actions for details.
        """

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.block_action(constraints, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def attachment_action(
        self,
        callback_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `interactive_message` action listener.
        Refer to https://api.slack.com/legacy/message-buttons for details."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.attachment_action(callback_id, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def dialog_submission(
        self,
        callback_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `dialog_submission` listener.
        Refer to https://api.slack.com/dialogs for details."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.dialog_submission(callback_id, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def dialog_cancellation(
        self,
        callback_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `dialog_cancellation` listener.
        Refer to https://api.slack.com/dialogs for details."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.dialog_cancellation(callback_id, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    # -------------------------
    # view

    def view(
        self,
        constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `view_submission`/`view_closed` event listener.
        This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.view("view_1")
            def handle_submission(ack, body, client, view):
                # Assume there's an input block with `block_c` as the block_id and `dreamy_input`
                hopes_and_dreams = view["state"]["values"]["block_c"]["dreamy_input"]
                user = body["user"]["id"]
                # Validate the inputs
                errors = {}
                if hopes_and_dreams is not None and len(hopes_and_dreams) <= 5:
                    errors["block_c"] = "The value must be longer than 5 characters"
                if len(errors) > 0:
                    ack(response_action="errors", errors=errors)
                    return
                # Acknowledge the view_submission event and close the modal
                ack()
                # Do whatever you want with the input data - here we're saving it to a DB

            # Pass a function to this method
            app.view("view_1")(handle_submission)

        Refer to https://api.slack.com/reference/interaction-payloads/views for details of payloads.

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            constraints: The conditions that match a request payload
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.view(constraints, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def view_submission(
        self,
        constraints: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `view_submission` listener.
        Refer to https://api.slack.com/reference/interaction-payloads/views#view_submission for details."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.view_submission(constraints, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def view_closed(
        self,
        constraints: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `view_closed` listener.
        Refer to https://api.slack.com/reference/interaction-payloads/views#view_closed for details."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.view_closed(constraints, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    # -------------------------
    # options

    def options(
        self,
        constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new options listener.
        This method can be used as either a decorator or a method.

            # Use this method as a decorator
            @app.options("menu_selection")
            def show_menu_options(ack):
                options = [
                    {
                        "text": {"type": "plain_text", "text": "Option 1"},
                        "value": "1-1",
                    },
                    {
                        "text": {"type": "plain_text", "text": "Option 2"},
                        "value": "1-2",
                    },
                ]
                ack(options=options)

            # Pass a function to this method
            app.options("menu_selection")(show_menu_options)

        Refer to the following documents for details:

        * https://api.slack.com/reference/block-kit/block-elements#external_select
        * https://api.slack.com/reference/block-kit/block-elements#external_multi_select

        To learn available arguments for middleware/listeners, see `slack_bolt.kwargs_injection.args`'s API document.

        Args:
            matchers: A list of listener matcher functions.
                Only when all the matchers return True, the listener function can be invoked.
            middleware: A list of lister middleware functions.
                Only when all the middleware call `next()` method, the listener function can be invoked.
        """

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.options(constraints, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def block_suggestion(
        self,
        action_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `block_suggestion` listener."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.block_suggestion(action_id, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    def dialog_suggestion(
        self,
        callback_id: Union[str, Pattern],
        matchers: Optional[Sequence[Callable[..., bool]]] = None,
        middleware: Optional[Sequence[Union[Callable, Middleware]]] = None,
    ) -> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]:
        """Registers a new `dialog_suggestion` listener.
        Refer to https://api.slack.com/dialogs for details."""

        def __call__(*args, **kwargs):
            functions = self._to_listener_functions(kwargs) if kwargs else list(args)
            primary_matcher = builtin_matchers.dialog_suggestion(callback_id, base_logger=self._base_logger)
            return self._register_listener(list(functions), primary_matcher, matchers, middleware)

        return __call__

    # -------------------------
    # built-in listener functions

    def default_tokens_revoked_event_listener(
        self,
    ) -> Callable[..., Optional[BoltResponse]]:
        if self._tokens_revocation_listeners is None:
            raise BoltError(error_installation_store_required_for_builtin_listeners())
        return self._tokens_revocation_listeners.handle_tokens_revoked_events

    def default_app_uninstalled_event_listener(
        self,
    ) -> Callable[..., Optional[BoltResponse]]:
        if self._tokens_revocation_listeners is None:
            raise BoltError(error_installation_store_required_for_builtin_listeners())
        return self._tokens_revocation_listeners.handle_app_uninstalled_events

    def enable_token_revocation_listeners(self) -> None:
        self.event("tokens_revoked")(self.default_tokens_revoked_event_listener())
        self.event("app_uninstalled")(self.default_app_uninstalled_event_listener())

    # -------------------------

    def _init_context(self, req: BoltRequest):
        req.context["logger"] = get_bolt_app_logger(app_name=self.name, base_logger=self._base_logger)
        req.context["token"] = self._token
        # Prior to version 1.15, when the token is static, self._client was passed to `req.context`.
        # The intention was to avoid creating a new instance per request
        # in the interest of runtime performance/memory footprint optimization.
        # However, developers may want to replace the token held by req.context.client in some situations.
        # In this case, this behavior can result in thread-unsafe data modification on `self._client`.
        # (`self._client` a.k.a. `app.client` is a singleton object per an App instance)
        # Thus, we've changed the behavior to create a new instance per request regardless of token argument
        # in the App initialization starting v1.15.
        # The overhead brought by this change is slight so that we believe that it is ignorable in any cases.
        client_per_request: WebClient = WebClient(
            token=self._token,  # this can be None, and it can be set later on
            base_url=self._client.base_url,
            timeout=self._client.timeout,
            ssl=self._client.ssl,
            proxy=self._client.proxy,
            headers=self._client.headers,
            team_id=req.context.team_id,
            retry_handlers=self._client.retry_handlers.copy() if self._client.retry_handlers is not None else None,
        )
        req.context["client"] = client_per_request

        # Most apps do not need this "listener_runner" instance.
        # It is intended for apps that start lazy listeners from their custom global middleware.
        req.context["listener_runner"] = self.listener_runner

        # For AI Agents & Assistants
        if is_assistant_event(req.body):
            assistant = AssistantUtilities(
                payload=to_event(req.body),  # type:ignore[arg-type]
                context=req.context,
                thread_context_store=self._assistant_thread_context_store,
            )
            req.context["say"] = assistant.say
            req.context["set_status"] = assistant.set_status
            req.context["set_title"] = assistant.set_title
            req.context["set_suggested_prompts"] = assistant.set_suggested_prompts
            req.context["get_thread_context"] = assistant.get_thread_context
            req.context["save_thread_context"] = assistant.save_thread_context

    @staticmethod
    def _to_listener_functions(
        kwargs: dict,
    ) -> Optional[Sequence[Callable[..., Optional[BoltResponse]]]]:
        if kwargs:
            functions = [kwargs["ack"]]
            for sub in kwargs["lazy"]:
                functions.append(sub)
            return functions
        return None

    def _register_listener(
        self,
        functions: Sequence[Callable[..., Optional[BoltResponse]]],
        primary_matcher: ListenerMatcher,
        matchers: Optional[Sequence[Callable[..., bool]]],
        middleware: Optional[Sequence[Union[Callable, Middleware]]],
        auto_acknowledgement: bool = False,
    ) -> Optional[Callable[..., Optional[BoltResponse]]]:
        value_to_return = None
        if not isinstance(functions, list):
            functions = list(functions)
        if len(functions) == 1:
            # In the case where the function is registered using decorator,
            # the registration should return the original function.
            value_to_return = functions[0]

        listener_matchers: List[ListenerMatcher] = [
            CustomListenerMatcher(app_name=self.name, func=f, base_logger=self._base_logger) for f in (matchers or [])
        ]
        listener_matchers.insert(0, primary_matcher)
        listener_middleware = []
        for m in middleware or []:
            if isinstance(m, Middleware):
                listener_middleware.append(m)
            elif callable(m):
                listener_middleware.append(CustomMiddleware(app_name=self.name, func=m, base_logger=self._base_logger))
            else:
                raise ValueError(error_unexpected_listener_middleware(type(m)))

        self._listeners.append(
            CustomListener(
                app_name=self.name,
                ack_function=functions.pop(0),
                lazy_functions=functions,
                matchers=listener_matchers,
                middleware=listener_middleware,
                auto_acknowledgement=auto_acknowledgement,
                base_logger=self._base_logger,
            )
        )
        return value_to_return

Instance variables

prop client : slack_sdk.web.client.WebClient

The singleton slack_sdk.WebClient instance in this app.

Expand source code
@property
def client(self) -> WebClient:
    """The singleton `slack_sdk.WebClient` instance in this app."""
    return self._client
prop installation_store : Optional[slack_sdk.oauth.installation_store.installation_store.InstallationStore]

The slack_sdk.oauth.InstallationStore that can be used in the authorize middleware.

Expand source code
@property
def installation_store(self) -> Optional[InstallationStore]:
    """The `slack_sdk.oauth.InstallationStore` that can be used in the `authorize` middleware."""
    return self._installation_store
prop listener_runnerThreadListenerRunner

The thread executor for asynchronously running listeners.

Expand source code
@property
def listener_runner(self) -> ThreadListenerRunner:
    """The thread executor for asynchronously running listeners."""
    return self._listener_runner
prop logger : logging.Logger

The logger this app uses.

Expand source code
@property
def logger(self) -> logging.Logger:
    """The logger this app uses."""
    return self._framework_logger
prop name : str

The name of this app (default: the filename)

Expand source code
@property
def name(self) -> str:
    """The name of this app (default: the filename)"""
    return self._name
prop oauth_flow : Optional[OAuthFlow]

Configured OAuthFlow object if exists.

Expand source code
@property
def oauth_flow(self) -> Optional[OAuthFlow]:
    """Configured `OAuthFlow` object if exists."""
    return self._oauth_flow
prop process_before_response : bool
Expand source code
@property
def process_before_response(self) -> bool:
    return self._process_before_response or False

Methods

def action(self, constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new action listener. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.action("approve_button")
def update_message(ack):
    ack()

# Pass a function to this method
app.action("approve_button")(update_message)

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

constraints
The conditions that match a request payload
matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def assistant(self, assistant: Assistant) ‑> Optional[Callable]
def attachment_action(self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new interactive_message action listener. Refer to https://api.slack.com/legacy/message-buttons for details.

def block_action(self, constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new block_actions action listener. Refer to https://api.slack.com/reference/interaction-payloads/block-actions for details.

def block_suggestion(self, action_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new block_suggestion listener.

def command(self, command: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new slash command listener. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.command("/echo")
def repeat_text(ack, say, command):
    # Acknowledge command request
    ack()
    say(f"{command['text']}")

# Pass a function to this method
app.command("/echo")(repeat_text)

Refer to https://api.slack.com/interactivity/slash-commands for details of Slash Commands.

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

command
The conditions that match a request payload
matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def default_app_uninstalled_event_listener(self) ‑> Callable[..., Optional[BoltResponse]]
def default_tokens_revoked_event_listener(self) ‑> Callable[..., Optional[BoltResponse]]
def dialog_cancellation(self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new dialog_cancellation listener. Refer to https://api.slack.com/dialogs for details.

def dialog_submission(self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new dialog_submission listener. Refer to https://api.slack.com/dialogs for details.

def dialog_suggestion(self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new dialog_suggestion listener. Refer to https://api.slack.com/dialogs for details.

def dispatch(self, req: BoltRequest) ‑> BoltResponse

Applies all middleware and dispatches an incoming request from Slack to the right code path.

Args

req
An incoming request from Slack

Returns

The response generated by this Bolt app

def enable_token_revocation_listeners(self) ‑> None
def error(self, func: Callable[..., Optional[BoltResponse]]) ‑> Callable[..., Optional[BoltResponse]]

Updates the global error handler. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.error
def custom_error_handler(error, body, logger):
    logger.exception(f"Error: {error}")
    logger.info(f"Request body: {body}")

# Pass a function to this method
app.error(custom_error_handler)

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

func
The function that is supposed to be executed when getting an unhandled error in Bolt app.
def event(self, event: Union[str, Pattern, Dict[str, Union[str, Sequence[Union[str, Pattern, ForwardRef(None)]], ForwardRef(None)]]], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new event listener. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.event("team_join")
def ask_for_introduction(event, say):
    welcome_channel_id = "C12345"
    user_id = event["user"]
    text = f"Welcome to the team, <@{user_id}>! :tada: You can introduce yourself in this channel."
    say(text=text, channel=welcome_channel_id)

# Pass a function to this method
app.event("team_join")(ask_for_introduction)

Refer to https://api.slack.com/apis/connections/events-api for details of Events API.

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

event
The conditions that match a request payload. If you pass a dict for this, you can have type, subtype in the constraint.
matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def function(self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None, auto_acknowledge: bool = True) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new Function listener. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.function("reverse")
def reverse_string(ack: Ack, inputs: dict, complete: Complete, fail: Fail):
    try:
        ack()
        string_to_reverse = inputs["stringToReverse"]
        complete(outputs={"reverseString": string_to_reverse[::-1]})
    except Exception as e:
        fail(f"Cannot reverse string (error: {e})")
        raise e

# Pass a function to this method
app.function("reverse")(reverse_string)

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

callback_id
The callback id to identify the function
matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def global_shortcut(self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new global shortcut listener.

def message(self, keyword: Union[str, Pattern] = '', matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new message event listener. This method can be used as either a decorator or a method. Check the App#event method's docstring for details.

# Use this method as a decorator
@app.message(":wave:")
def say_hello(message, say):
    user = message['user']
    say(f"Hi there, <@{user}>!")

# Pass a function to this method
app.message(":wave:")(say_hello)

Refer to https://api.slack.com/events/message for details of message events.

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

keyword
The keyword to match
matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def message_shortcut(self, callback_id: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new message shortcut listener.

def middleware(self, *args) ‑> Optional[Callable]

Registers a new middleware to this app. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.middleware
def middleware_func(logger, body, next):
    logger.info(f"request body: {body}")
    next()

# Pass a function to this method
app.middleware(middleware_func)

Refer to https://slack.dev/bolt-python/concepts#global-middleware for details.

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

*args
A function that works as a global middleware.
def options(self, constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new options listener. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.options("menu_selection")
def show_menu_options(ack):
    options = [
        {
            "text": {"type": "plain_text", "text": "Option 1"},
            "value": "1-1",
        },
        {
            "text": {"type": "plain_text", "text": "Option 2"},
            "value": "1-2",
        },
    ]
    ack(options=options)

# Pass a function to this method
app.options("menu_selection")(show_menu_options)

Refer to the following documents for details:

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def shortcut(self, constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new shortcut listener. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.shortcut("open_modal")
def open_modal(ack, body, client):
    # Acknowledge the command request
    ack()
    # Call views_open with the built-in client
    client.views_open(
        # Pass a valid trigger_id within 3 seconds of receiving it
        trigger_id=body["trigger_id"],
        # View payload
        view={ ... }
    )

# Pass a function to this method
app.shortcut("open_modal")(open_modal)

Refer to https://api.slack.com/interactivity/shortcuts for details about Shortcuts.

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

constraints
The conditions that match a request payload.
matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def start(self, port: int = 3000, path: str = '/slack/events', http_server_logger_enabled: bool = True) ‑> None

Starts a web server for local development.

# With the default settings, `http://localhost:3000/slack/events`
# is available for handling incoming requests from Slack
app.start()

This method internally starts a Web server process built with the http.server module. For production, consider using a production-ready WSGI server such as Gunicorn.

Args

port
The port to listen on (Default: 3000)
path
The path to handle request from Slack (Default: /slack/events)
http_server_logger_enabled
The flag to enable http.server logging if True (Default: True)
def step(self, callback_id: Union[str, Pattern, WorkflowStepWorkflowStepBuilder], edit: Union[Callable[..., Optional[BoltResponse]], Listener, Sequence[Callable], ForwardRef(None)] = None, save: Union[Callable[..., Optional[BoltResponse]], Listener, Sequence[Callable], ForwardRef(None)] = None, execute: Union[Callable[..., Optional[BoltResponse]], Listener, Sequence[Callable], ForwardRef(None)] = None)

Deprecated

Steps from apps for legacy workflows are now deprecated. Use new custom steps: https://api.slack.com/automation/functions/custom-bolt

Registers a new step from app listener.

Unlike others, this method doesn't behave as a decorator. If you want to register a step from app by a decorator, use WorkflowStepBuilder's methods.

# Create a new WorkflowStep instance
from slack_bolt.workflows.step import WorkflowStep
ws = WorkflowStep(
    callback_id="add_task",
    edit=edit,
    save=save,
    execute=execute,
)
# Pass Step to set up listeners
app.step(ws)

Refer to https://api.slack.com/workflows/steps for details of steps from apps.

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

For further information about WorkflowStep specific function arguments such as configure, update, complete, and fail, refer to slack_bolt.workflows.step.utilities API documents.

Args

callback_id
The Callback ID for this step from app
edit
The function for displaying a modal in the Workflow Builder
save
The function for handling configuration in the Workflow Builder
execute
The function for handling the step execution
def use(self, *args) ‑> Optional[Callable]

Registers a new global middleware to this app. This method can be used as either a decorator or a method.

Refer to App#middleware() method's docstring for details.

def view(self, constraints: Union[str, Pattern, Dict[str, Union[str, Pattern]]], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new view_submission/view_closed event listener. This method can be used as either a decorator or a method.

# Use this method as a decorator
@app.view("view_1")
def handle_submission(ack, body, client, view):
    # Assume there's an input block with <code>block\_c</code> as the block_id and <code>dreamy\_input</code>
    hopes_and_dreams = view["state"]["values"]["block_c"]["dreamy_input"]
    user = body["user"]["id"]
    # Validate the inputs
    errors = {}
    if hopes_and_dreams is not None and len(hopes_and_dreams) <= 5:
        errors["block_c"] = "The value must be longer than 5 characters"
    if len(errors) > 0:
        ack(response_action="errors", errors=errors)
        return
    # Acknowledge the view_submission event and close the modal
    ack()
    # Do whatever you want with the input data - here we're saving it to a DB

# Pass a function to this method
app.view("view_1")(handle_submission)

Refer to https://api.slack.com/reference/interaction-payloads/views for details of payloads.

To learn available arguments for middleware/listeners, see slack_bolt.kwargs_injection.args's API document.

Args

constraints
The conditions that match a request payload
matchers
A list of listener matcher functions. Only when all the matchers return True, the listener function can be invoked.
middleware
A list of lister middleware functions. Only when all the middleware call next() method, the listener function can be invoked.
def view_closed(self, constraints: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new view_closed listener. Refer to https://api.slack.com/reference/interaction-payloads/views#view_closed for details.

def view_submission(self, constraints: Union[str, Pattern], matchers: Optional[Sequence[Callable[..., bool]]] = None, middleware: Optional[Sequence[Union[Callable, Middleware]]] = None) ‑> Callable[..., Optional[Callable[..., Optional[BoltResponse]]]]

Registers a new view_submission listener. Refer to https://api.slack.com/reference/interaction-payloads/views#view_submission for details.

class SlackAppDevelopmentServer (port: int, path: str, app: App, oauth_flow: Optional[OAuthFlow] = None, http_server_logger_enabled: bool = True)

Slack App Development Server

This is a thin wrapper of http.server.HTTPServer and is good enough for your local development or prototyping.

However, as mentioned in Python official documents, using http.server module in production is not recommended. Please consider using an adapter (refer to slack_bolt.adapter.*) along with a production-grade server when running the app for end users. https://docs.python.org/3/library/http.server.html#http.server.HTTPServer

Args

port
the port number
path
the path to receive incoming requests
app
the App instance to execute
oauth_flow
the OAuthFlow instance to use for OAuth flow
http_server_logger_enabled
The flag to turn on/off http.server's logging
Expand source code
class SlackAppDevelopmentServer:
    def __init__(
        self,
        port: int,
        path: str,
        app: App,
        oauth_flow: Optional[OAuthFlow] = None,
        http_server_logger_enabled: bool = True,
    ):
        """Slack App Development Server

        This is a thin wrapper of http.server.HTTPServer and is good enough
        for your local development or prototyping.

        However, as mentioned in Python official documents, using http.server module in production
        is not recommended. Please consider using an adapter (refer to slack_bolt.adapter.*)
        along with a production-grade server when running the app for end users.
        https://docs.python.org/3/library/http.server.html#http.server.HTTPServer

        Args:
            port: the port number
            path: the path to receive incoming requests
            app: the `App` instance to execute
            oauth_flow: the `OAuthFlow` instance to use for OAuth flow
            http_server_logger_enabled: The flag to turn on/off http.server's logging
        """
        self._port: int = port
        self._bolt_endpoint_path: str = path
        self._bolt_app: App = app
        self._bolt_oauth_flow: Optional[OAuthFlow] = oauth_flow
        self._http_server_logger_enabled = http_server_logger_enabled

        _port: int = self._port
        _bolt_endpoint_path: str = self._bolt_endpoint_path
        _bolt_app: App = self._bolt_app
        _bolt_oauth_flow: Optional[OAuthFlow] = self._bolt_oauth_flow
        _http_server_logger_enabled = self._http_server_logger_enabled

        class SlackAppHandler(SimpleHTTPRequestHandler):
            def log_message(self, format: str, *args: Any) -> None:
                if _http_server_logger_enabled is True:
                    super().log_message(format, *args)

            def do_GET(self):
                if _bolt_oauth_flow:
                    request_path, _, query = self.path.partition("?")
                    if request_path == _bolt_oauth_flow.install_path:
                        bolt_req = BoltRequest(
                            body="",
                            query=query,
                            # email.message.Message's mapping interface is dict compatible
                            headers=self.headers,
                        )
                        bolt_resp = _bolt_oauth_flow.handle_installation(bolt_req)
                        self._send_bolt_response(bolt_resp)
                    elif request_path == _bolt_oauth_flow.redirect_uri_path:
                        bolt_req = BoltRequest(
                            body="",
                            query=query,
                            # email.message.Message's mapping interface is dict compatible
                            headers=self.headers,
                        )
                        bolt_resp = _bolt_oauth_flow.handle_callback(bolt_req)
                        self._send_bolt_response(bolt_resp)
                    else:
                        self._send_response(404, headers={})
                else:
                    self._send_response(404, headers={})

            def do_POST(self):
                request_path, _, query = self.path.partition("?")
                if _bolt_endpoint_path != request_path:
                    self._send_response(404, headers={})
                    return

                len_header = self.headers.get("Content-Length") or 0
                request_body = self.rfile.read(int(len_header)).decode("utf-8")
                bolt_req = BoltRequest(
                    body=request_body,
                    query=query,
                    # email.message.Message's mapping interface is dict compatible
                    headers=self.headers,
                )
                bolt_resp: BoltResponse = _bolt_app.dispatch(bolt_req)
                self._send_bolt_response(bolt_resp)

            def _send_bolt_response(self, bolt_resp: BoltResponse):
                self._send_response(
                    status=bolt_resp.status,
                    headers=bolt_resp.headers,
                    body=bolt_resp.body,
                )

            def _send_response(
                self,
                status: int,
                headers: Dict[str, Sequence[str]],
                body: Union[str, dict] = "",
            ):
                self.send_response(status)

                response_body = body if isinstance(body, str) else json.dumps(body)
                body_bytes = response_body.encode("utf-8")

                for k, vs in headers.items():
                    for v in vs:
                        self.send_header(k, v)
                self.send_header("Content-Length", str(len(body_bytes)))
                self.end_headers()
                self.wfile.write(body_bytes)

        self._server = HTTPServer(("0.0.0.0", self._port), SlackAppHandler)

    def start(self) -> None:
        """Starts a new web server process."""
        if self._bolt_app.logger.level > logging.INFO:
            print(get_boot_message(development_server=True))
        else:
            self._bolt_app.logger.info(get_boot_message(development_server=True))

        try:
            self._server.serve_forever(0.05)
        finally:
            self._server.server_close()

Methods

def start(self) ‑> None

Starts a new web server process.