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<body>
<main>
<article id="content">
<header>
<h1 class="title">Package <code>slack_bolt</code></h1>
</header>
<section id="section-intro">
<p>A Python framework to build Slack apps in a flash with the latest platform features.Read the <a href="https://docs.slack.dev/tools/bolt-python/building-an-app">getting started guide</a> and look at our <a href="https://github.com/slackapi/bolt-python/tree/main/examples">code examples</a> to learn how to build apps using Bolt.</p>
<ul>
<li>Website: <a href="https://docs.slack.dev/tools/bolt-python/">https://docs.slack.dev/tools/bolt-python/</a></li>
<li>GitHub repository: <a href="https://github.com/slackapi/bolt-python">https://github.com/slackapi/bolt-python</a></li>
<li>The class representing a Bolt app: <code><a title="slack_bolt.app.app" href="app/app.html">slack_bolt.app.app</a></code></li>
</ul>
</section>
<section>
<h2 class="section-title" id="header-submodules">Sub-modules</h2>
<dl>
<dt><code class="name"><a title="slack_bolt.adapter" href="adapter/index.html">slack_bolt.adapter</a></code></dt>
<dd>
<div class="desc"><p>Adapter modules for running Bolt apps along with Web frameworks or Socket Mode.</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.app" href="app/index.html">slack_bolt.app</a></code></dt>
<dd>
<div class="desc"><p>Application interface in Bolt …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.async_app" href="async_app.html">slack_bolt.async_app</a></code></dt>
<dd>
<div class="desc"><p>Module for creating asyncio based apps …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.authorization" href="authorization/index.html">slack_bolt.authorization</a></code></dt>
<dd>
<div class="desc"><p>Authorization is the process of determining which Slack credentials should be available
while processing an incoming Slack event …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.context" href="context/index.html">slack_bolt.context</a></code></dt>
<dd>
<div class="desc"><p>All listeners have access to a context dictionary, which can be used to enrich events with additional information.
Bolt automatically attaches …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.error" href="error/index.html">slack_bolt.error</a></code></dt>
<dd>
<div class="desc"><p>Bolt specific error types.</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.kwargs_injection" href="kwargs_injection/index.html">slack_bolt.kwargs_injection</a></code></dt>
<dd>
<div class="desc"><p>For middleware/listener arguments, Bolt does flexible data injection in accordance with their names …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.lazy_listener" href="lazy_listener/index.html">slack_bolt.lazy_listener</a></code></dt>
<dd>
<div class="desc"><p>Lazy listener runner is a beta feature for the apps running on Function-as-a-Service platforms …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.listener" href="listener/index.html">slack_bolt.listener</a></code></dt>
<dd>
<div class="desc"><p>Listeners process an incoming request from Slack if the request's type or data structure matches
the predefined conditions of the listener. Typically, …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.listener_matcher" href="listener_matcher/index.html">slack_bolt.listener_matcher</a></code></dt>
<dd>
<div class="desc"><p>A listener matcher is a simplified version of listener middleware.
A listener matcher function returns bool value instead of <code>next()</code> method …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.logger" href="logger/index.html">slack_bolt.logger</a></code></dt>
<dd>
<div class="desc"><p>Bolt for Python relies on the standard <code>logging</code> module.</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.middleware" href="middleware/index.html">slack_bolt.middleware</a></code></dt>
<dd>
<div class="desc"><p>A middleware processes request data and calls <code>next()</code> method
if the execution chain should continue running the following middleware …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.oauth" href="oauth/index.html">slack_bolt.oauth</a></code></dt>
<dd>
<div class="desc"><p>Slack OAuth flow support for building an app that is installable in any workspaces …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.request" href="request/index.html">slack_bolt.request</a></code></dt>
<dd>
<div class="desc"><p>Incoming request from Slack through either HTTP request or Socket Mode connection …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.response" href="response/index.html">slack_bolt.response</a></code></dt>
<dd>
<div class="desc"><p>This interface represents Bolt's synchronous response to Slack …</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.util" href="util/index.html">slack_bolt.util</a></code></dt>
<dd>
<div class="desc"><p>Internal utilities for the Bolt framework.</p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.version" href="version.html">slack_bolt.version</a></code></dt>
<dd>
<div class="desc"><p>Check the latest version at <a href="https://pypi.org/project/slack-bolt/">https://pypi.org/project/slack-bolt/</a></p></div>
</dd>
<dt><code class="name"><a title="slack_bolt.workflows" href="workflows/index.html">slack_bolt.workflows</a></code></dt>
<dd>
<div class="desc"><p>Steps from apps enables developers to build their own steps …</p></div>
</dd>
</dl>
</section>
<section>
</section>
<section>
</section>
<section>
<h2 class="section-title" id="header-classes">Classes</h2>
<dl>
<dt id="slack_bolt.Ack"><code class="flex name class">
<span>class <span class="ident">Ack</span></span>
</code></dt>
<dd>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">class Ack:
response: Optional[BoltResponse]
def __init__(self):
self.response: Optional[BoltResponse] = None
def __call__(
self,
text: Union[str, dict] = "", # text: str or whole_response: dict
blocks: Optional[Sequence[Union[dict, Block]]] = None,
attachments: Optional[Sequence[Union[dict, Attachment]]] = None,
unfurl_links: Optional[bool] = None,
unfurl_media: Optional[bool] = None,
response_type: Optional[str] = None, # in_channel / ephemeral
# block_suggestion / dialog_suggestion
options: Optional[Sequence[Union[dict, Option]]] = None,
option_groups: Optional[Sequence[Union[dict, OptionGroup]]] = None,
# view_submission
response_action: Optional[str] = None, # errors / update / push / clear
errors: Optional[Dict[str, str]] = None,
view: Optional[Union[dict, View]] = None,
) -> BoltResponse:
return _set_response(
self,
text_or_whole_response=text,
blocks=blocks,
attachments=attachments,
unfurl_links=unfurl_links,
unfurl_media=unfurl_media,
response_type=response_type,
options=options,
option_groups=option_groups,
response_action=response_action,
errors=errors,
view=view,
)</code></pre>
</details>
<div class="desc"></div>
<h3>Class variables</h3>
<dl>
<dt id="slack_bolt.Ack.response"><code class="name">var <span class="ident">response</span> : <a title="slack_bolt.response.response.BoltResponse" href="response/response.html#slack_bolt.response.response.BoltResponse">BoltResponse</a> | None</code></dt>
<dd>
<div class="desc"><p>The type of the None singleton.</p></div>
</dd>
</dl>
</dd>
<dt id="slack_bolt.App"><code class="flex name class">
<span>class <span class="ident">App</span></span>
<span>(</span><span>*,<br>logger: logging.Logger | None = None,<br>name: str | None = None,<br>process_before_response: bool = False,<br>raise_error_for_unhandled_request: bool = False,<br>signing_secret: str | None = None,<br>token: str | None = None,<br>token_verification_enabled: bool = True,<br>client: slack_sdk.web.client.WebClient | None = None,<br>before_authorize: <a title="slack_bolt.middleware.middleware.Middleware" href="middleware/middleware.html#slack_bolt.middleware.middleware.Middleware">Middleware</a> | Callable[..., Any] | None = None,<br>authorize: Callable[..., <a title="slack_bolt.authorization.authorize_result.AuthorizeResult" href="authorization/authorize_result.html#slack_bolt.authorization.authorize_result.AuthorizeResult">AuthorizeResult</a>] | None = None,<br>user_facing_authorize_error_message: str | None = None,<br>installation_store: slack_sdk.oauth.installation_store.installation_store.InstallationStore | None = None,<br>installation_store_bot_only: bool | None = None,<br>request_verification_enabled: bool = True,<br>ignoring_self_events_enabled: bool = True,<br>ignoring_self_assistant_message_events_enabled: bool = True,<br>ssl_check_enabled: bool = True,<br>url_verification_enabled: bool = True,<br>attaching_function_token_enabled: bool = True,<br>oauth_settings: <a title="slack_bolt.oauth.oauth_settings.OAuthSettings" href="oauth/oauth_settings.html#slack_bolt.oauth.oauth_settings.OAuthSettings">OAuthSettings</a> | None = None,<br>oauth_flow: <a title="slack_bolt.oauth.oauth_flow.OAuthFlow" href="oauth/oauth_flow.html#slack_bolt.oauth.oauth_flow.OAuthFlow">OAuthFlow</a> | None = None,<br>verification_token: str | None = None,<br>listener_executor: concurrent.futures._base.Executor | None = None,<br>assistant_thread_context_store: <a title="slack_bolt.context.assistant.thread_context_store.store.AssistantThreadContextStore" href="context/assistant/thread_context_store/store.html#slack_bolt.context.assistant.thread_context_store.store.AssistantThreadContextStore">AssistantThreadContextStore</a> | None = None)</span>
</code></dt>
<dd>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">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://docs.slack.dev/tools/bolt-python/building-an-app for details.
If you would like to build an OAuth app for enabling the app to run with multiple workspaces,
refer to https://docs.slack.dev/tools/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://docs.slack.dev/tools/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://docs.slack.dev/workflows/workflow-steps/
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://docs.slack.dev/legacy/legacy-steps-from-apps/ 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://docs.slack.dev/workflows/workflow-steps/"
),
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://docs.slack.dev/apis/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://docs.slack.dev/reference/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(