APIFlask¶
The Flask object with some web API support.
Examples:
from apiflask import APIFlask
app = APIFlask(__name__)
Attributes:
| Name | Type | Description |
|---|---|---|
openapi_version |
The version of OpenAPI Specification (openapi.openapi).
This attribute can also be configured from the config with the
|
|
servers |
The servers information of the API (openapi.servers), accepts multiple server dicts. Example value: This attribute can also be configured from the config with the
|
|
tags |
The list of tags of the OpenAPI spec documentation (openapi.tags), accepts a list of dicts. You can also pass a simple list contains the tag name: A standard OpenAPI tags list will look like this: If not set, the blueprint names will be used as tags. This attribute can also be configured from the config with the
|
|
external_docs |
The external documentation information of the API (openapi.externalDocs). Example: This attribute can also be configured from the config with the
|
|
info |
The info object (openapi.info), it accepts a dict contains following info fields:
|
|
description |
The description of the API (openapi.info.description).
This attribute can also be configured from the config with the
|
|
contact |
The contact information of the API (openapi.info.contact). Example: This attribute can also be configured from the config with the
|
|
license |
The license of the API (openapi.info.license). Example: This attribute can also be configured from the config with the
|
|
terms_of_service |
The terms of service URL of the API (openapi.info.termsOfService). Example: This attribute can also be configured from the config with the
|
|
security_schemes |
The security schemes of the API (openapi.components.securitySchemes). Example: This attribute can also be configured from the config with the
|
|
spec_callback |
t.Optional[SpecCallbackType] |
It stores the function object registerd by
|
error_callback |
ErrorCallbackType |
It stores the function object registerd by
|
schema_name_resolver |
It stores the function that used to decided the schema name. The schema name resolver should accept the schema object as argument and return the name. Example: |
Version changed: 1.0
- Add instance attribute
security_schemesas an alias of configSECURITY_SCHEMES.
Version changed: 0.9.0
- Add instance attribute
schema_name_resolver.
Source code in apiflask/app.py
class APIFlask(APIScaffold, Flask):
"""The `Flask` object with some web API support.
Examples:
```python
from apiflask import APIFlask
app = APIFlask(__name__)
```
Attributes:
openapi_version: The version of OpenAPI Specification (openapi.openapi).
This attribute can also be configured from the config with the
`OPENAPI_VERSION` configuration key. Defaults to `'3.0.3'`.
servers: The servers information of the API (openapi.servers), accepts
multiple server dicts. Example value:
```python
app.servers = [
{
'name': 'Production Server',
'url': 'http://api.example.com'
}
]
```
This attribute can also be configured from the config with the
`SERVERS` configuration key. Defaults to `None`.
tags: The list of tags of the OpenAPI spec documentation (openapi.tags),
accepts a list of dicts. You can also pass a simple list contains the
tag name:
```python
app.tags = ['foo', 'bar', 'baz']
```
A standard OpenAPI tags list will look like this:
```python
app.tags = [
{'name': 'foo', 'description': 'The description of foo'},
{'name': 'bar', 'description': 'The description of bar'},
{'name': 'baz', 'description': 'The description of baz'}
]
```
If not set, the blueprint names will be used as tags.
This attribute can also be configured from the config with the
`TAGS` configuration key. Defaults to `None`.
external_docs: The external documentation information of the API
(openapi.externalDocs). Example:
```python
app.external_docs = {
'description': 'Find more info here',
'url': 'http://docs.example.com'
}
```
This attribute can also be configured from the config with the
`EXTERNAL_DOCS` configuration key. Defaults to `None`.
info: The info object (openapi.info), it accepts a dict contains following info fields:
`description`, `termsOfService`, `contact`, `license`. You can use separate
configuration variables to overwrite this dict. Example:
```python
app.info = {
'description': '...',
'termsOfService': 'http://example.com',
'contact': {
'name': 'API Support',
'url': 'http://www.example.com/support',
'email': 'support@example.com'
},
'license': {
'name': 'Apache 2.0',
'url': 'http://www.apache.org/licenses/LICENSE-2.0.html'
}
}
```
description: The description of the API (openapi.info.description).
This attribute can also be configured from the config with the
`DESCRIPTION` configuration key. Defaults to `None`.
contact: The contact information of the API (openapi.info.contact). Example:
```python
app.contact = {
'name': 'API Support',
'url': 'http://www.example.com/support',
'email': 'support@example.com'
}
```
This attribute can also be configured from the config with the
`CONTACT` configuration key. Defaults to `None`.
license: The license of the API (openapi.info.license). Example:
```python
app.license = {
'name': 'Apache 2.0',
'url': 'http://www.apache.org/licenses/LICENSE-2.0.html'
}
```
This attribute can also be configured from the config with the
`LICENSE` configuration key. Defaults to `None`.
terms_of_service: The terms of service URL of the API
(openapi.info.termsOfService). Example:
```python
app.terms_of_service = 'http://example.com/terms/'
```
This attribute can also be configured from the config with the
`TERMS_OF_SERVICE` configuration key. Defaults to `None`.
security_schemes: The security schemes of the API
(openapi.components.securitySchemes). Example:
```python
app.security_schemes = [
'ApiKeyAuth': {
'type': 'apiKey',
'in': 'header',
'name': 'X-API-Key'
}
]
```
This attribute can also be configured from the config with the
`SECURITY_SCHEMES` configuration key. Defaults to `None`.
spec_callback: It stores the function object registerd by
[`spec_processor`][apiflask.APIFlask.spec_processor]. You can also
pass a callback function to it directly without using `spec_processor`.
Example:
```python
def update_spec(spec):
spec['title'] = 'Updated Title'
return spec
app.spec_callback = update_spec
```
error_callback: It stores the function object registerd by
[`error_processor`][apiflask.APIFlask.error_processor]. You can also
pass a callback function to it directly without using `error_processor`.
See the docstring of `error_processor` for more details.
Example:
```python
def my_error_handler(error):
return {
'status_code': error.status_code,
'message': error.message,
'detail': error.detail
}, error.status_code, error.headers
app.error_processor = my_error_handler
```
schema_name_resolver: It stores the function that used to decided the schema name.
The schema name resolver should accept the schema object as argument and return
the name.
Example:
```python
# this is the default schema name resolver used in APIFlask
def schema_name_resolver(schema):
name = schema.__class__.__name__ # get schema class name
if name.endswith('Schema'): # remove the "Schema" suffix
name = name[:-6] or name
if schema.partial: # add a "Update" suffix for partial schema
name += 'Update'
return name
app.schema_name_resolver = schema_name_resolver
```
*Version changed: 1.0*
- Add instance attribute `security_schemes` as an alias of config `SECURITY_SCHEMES`.
*Version changed: 0.9.0*
- Add instance attribute `schema_name_resolver`.
"""
openapi_version: str = ConfigAttribute('OPENAPI_VERSION') # type: ignore
tags: t.Optional[TagsType] = ConfigAttribute('TAGS') # type: ignore
servers: t.Optional[t.List[t.Dict[str, str]]] = ConfigAttribute('SERVERS') # type: ignore
info: t.Optional[t.Dict[str, t.Union[str, dict]]] = ConfigAttribute('INFO') # type: ignore
description: t.Optional[str] = ConfigAttribute('DESCRIPTION') # type: ignore
contact: t.Optional[t.Dict[str, str]] = ConfigAttribute('CONTACT') # type: ignore
license: t.Optional[t.Dict[str, str]] = ConfigAttribute('LICENSE') # type: ignore
external_docs: t.Optional[t.Dict[str, str]] = ConfigAttribute('EXTERNAL_DOCS') # type: ignore
terms_of_service: t.Optional[str] = ConfigAttribute('TERMS_OF_SERVICE') # type: ignore
security_schemes: t.Optional[t.Dict[str, t.Any]] = \
ConfigAttribute('SECURITY_SCHEMES') # type: ignore
def __init__(
self,
import_name: str,
title: str = 'APIFlask',
version: str = '0.1.0',
spec_path: t.Optional[str] = '/openapi.json',
docs_path: t.Optional[str] = '/docs',
docs_oauth2_redirect_path: t.Optional[str] = '/docs/oauth2-redirect',
docs_ui: str = 'swagger-ui',
redoc_path: t.Optional[str] = '/redoc',
openapi_blueprint_url_prefix: t.Optional[str] = None,
json_errors: bool = True,
enable_openapi: bool = True,
spec_plugins: t.Optional[t.List[BasePlugin]] = None,
static_url_path: t.Optional[str] = None,
static_folder: str = 'static',
static_host: t.Optional[str] = None,
host_matching: bool = False,
subdomain_matching: bool = False,
template_folder: str = 'templates',
instance_path: t.Optional[str] = None,
instance_relative_config: bool = False,
root_path: t.Optional[str] = None
) -> None:
"""Make an app instance.
Arguments:
import_name: The name of the application package, usually
`__name__`. This helps locate the `root_path` for the
application.
title: The title of the API (openapi.info.title), defaults to "APIFlask".
You can change it to the name of your API (e.g., "Pet API").
version: The version of the API (openapi.info.version), defaults to "0.1.0".
spec_path: The path to OpenAPI Spec documentation. It
defaults to `/openapi.json`, if the path ends with `.yaml`
or `.yml`, the YAML format of the OAS will be returned.
docs_path: The path to API UI documentation, defaults to `/docs`.
docs_ui: The UI of API documentation, one of `swagger-ui` (default), `redoc`,
`elements`, `rapidoc`, and `rapipdf`.
docs_oauth2_redirect_path: The path to Swagger UI OAuth redirect.
redoc_path: Deprecated since 1.1, set `APIFlask(docs_ui='redoc')` to use Redoc.
The path to Redoc documentation, defaults to `/redoc`.
openapi_blueprint_url_prefix: The url prefix of the OpenAPI blueprint. This
prefix will append before all the OpenAPI-related paths (`sepc_path`,
`docs_path`, etc.), defaults to `None`.
json_errors: If `True`, APIFlask will return a JSON response for HTTP errors.
enable_openapi: If `False`, will disable OpenAPI spec and API docs views.
spec_plugins: List of apispec-compatible plugins (subclasses of `apispec.BasePlugin`),
defaults to `None`. The `MarshmallowPlugin` for apispec is already included
by default, so it doesn't need to be provided here.
Other keyword arguments are directly passed to `flask.Flask`.
*Version changed: 1.2.0*
- Add `spec_plugins` parameter.
*Version changed: 1.1.0*
- Add `docs_ui` parameter.
*Version changed: 0.7.0*
- Add `openapi_blueprint_url_prefix` parameter.
"""
super().__init__(
import_name,
static_url_path=static_url_path,
static_folder=static_folder,
static_host=static_host,
host_matching=host_matching,
subdomain_matching=subdomain_matching,
template_folder=template_folder,
instance_path=instance_path,
instance_relative_config=instance_relative_config,
root_path=root_path
)
# Set default config
self.config.from_object('apiflask.settings')
self.title = title
self.version = version
self.spec_path = spec_path
self.docs_ui = docs_ui
self.docs_path = docs_path
self.redoc_path = redoc_path
self.docs_oauth2_redirect_path = docs_oauth2_redirect_path
self.openapi_blueprint_url_prefix = openapi_blueprint_url_prefix
self.enable_openapi = enable_openapi
self.json_errors = json_errors
self.spec_callback: t.Optional[SpecCallbackType] = None
self.error_callback: ErrorCallbackType = self._error_handler
self.schema_name_resolver = self._schema_name_resolver
self.spec_plugins: t.List[BasePlugin] = spec_plugins or []
self._spec: t.Optional[t.Union[dict, str]] = None
self._auth_blueprints: t.Dict[str, t.Dict[str, t.Any]] = {}
self._register_openapi_blueprint()
self._register_error_handlers()
def _register_error_handlers(self) -> None:
"""Register default error handlers for HTTPError and WerkzeugHTTPException.
*Version changed: 0.9.0*
- Always pass an `HTTPError` instance to error handlers.
"""
@self.errorhandler(HTTPError) # type: ignore
def handle_http_errors(
error: HTTPError
) -> ResponseReturnValueType:
return self.error_callback(error)
if self.json_errors:
self._apply_error_callback_to_werkzeug_errors()
def _apply_error_callback_to_werkzeug_errors(self) -> None:
@self.errorhandler(WerkzeugHTTPException) # type: ignore
def handle_werkzeug_errors(
e: WerkzeugHTTPException
) -> ResponseReturnValueType:
headers = dict(e.get_headers())
# remove the original MIME header
del headers['Content-Type']
error = HTTPError(
e.code,
message=e.name,
headers=headers
)
return self.error_callback(error)
def dispatch_request(self) -> ResponseReturnValueType: # type: ignore
"""Overwrite the default dispatch method in Flask.
With this overwrite, view arguments are passed as positional
arguments so that the view function can intuitively accept the
parameters (i.e., from top to bottom, from left to right).
Examples:
```python
@app.get('/pets/<name>/<int:pet_id>/<age>') # -> name, pet_id, age
@app.input(Query) # -> query
@app.output(Pet) # -> pet
def get_pet(name, pet_id, age, query, pet):
pass
```
From Flask, see the NOTICE file for license information.
*Version added: 0.2.0*
"""
req = request_ctx.request if request_ctx else _request_ctx_stack.top.request # type: ignore
if req.routing_exception is not None:
self.raise_routing_exception(req)
rule = req.url_rule
# if we provide automatic options for this URL and the
# request came with the OPTIONS method, reply automatically
if ( # pragma: no cover
getattr(rule, 'provide_automatic_options', False)
and req.method == 'OPTIONS'
):
return self.make_default_options_response() # pragma: no cover
# otherwise dispatch to the handler for that endpoint
view_function = self.view_functions[rule.endpoint]
if hasattr(self, 'ensure_sync'): # pragma: no cover
view_function = self.ensure_sync(view_function)
if rule.endpoint == 'static' or hasattr(view_function, '_only_kwargs'):
# app static route only accepts keyword arguments, see flask#3762
# view classes created by Flask only accept keyword arguments
return view_function(**req.view_args) # type: ignore
else:
return view_function(*req.view_args.values()) # type: ignore
# TODO: remove this function when we dropped the Flask 1.x support
# the list return values are supported in Flask 2.2
def make_response(self, rv) -> Response:
"""Patch the make_response form Flask to allow returning list as JSON.
*Version added: 1.1.0*
"""
if isinstance(rv, list):
rv = jsonify(rv)
elif isinstance(rv, tuple) and isinstance(rv[0], list):
rv = (jsonify(rv[0]), *rv[1:])
return super().make_response(rv)
@staticmethod
def _error_handler(
error: HTTPError
) -> ResponseReturnValueType:
"""The default error handler.
Arguments:
error: An instance of [`HTTPError`][apiflask.exceptions.HTTPError].
*Version changed: 0.10.0*
- Remove the `status_code` field from the response.
- Add `HTTPError.extra_data` to the reponse body.
"""
body = {
'detail': error.detail,
'message': error.message,
**error.extra_data
}
return body, error.status_code, error.headers
def error_processor(
self,
f: ErrorCallbackType
) -> ErrorCallbackType:
"""A decorator to register a custom error response processor function.
The decorated callback function will be called in the following situations:
- Any HTTP exception is raised by Flask when handling request.
- A validation error happened when parsing a request.
- An exception triggered with [`HTTPError`][apiflask.exceptions.HTTPError]
- An exception triggered with [`abort`][apiflask.exceptions.abort].
You can still register a specific error handler for a specific error code
or exception with the `app.errorhandler(code_or_exection)` decorator,
in that case, the return value of the specific error handler will be used as the
response when the corresponding error or exception happened.
The callback function must accept an error object as argument and return a valid
response.
Examples:
```python
@app.error_processor
def my_error_processor(error):
return {
'status_code': error.status_code,
'message': error.message,
'detail': error.detail,
**error.extra_data
}, error.status_code, error.headers
```
The error object is an instance of [`HTTPError`][apiflask.exceptions.HTTPError],
so you can get error information via it's attributes:
- status_code: If the error is triggered by a validation error, the value will be
422 (default) or the value you passed in config `VALIDATION_ERROR_STATUS_CODE`.
If the error is triggered by [`HTTPError`][apiflask.exceptions.HTTPError]
or [`abort`][apiflask.exceptions.abort], it will be the status code
you passed. Otherwise, it will be the status code set by Werkzueg when
processing the request.
- message: The error description for this error, either you passed or grabbed from
Werkzeug.
- detail: The detail of the error. When the validation error happens, it will
be filled automatically in the following structure:
```python
"<location>": {
"<field_name>": ["<error_message>", ...],
"<field_name>": ["<error_message>", ...],
...
},
"<location>": {
...
},
...
```
The value of `location` can be `json` (i.e., request body) or `query`
(i.e., query string) depending on the place where the validation error
happened.
- headers: The value will be `{}` unless you pass it in `HTTPError` or `abort`.
- extra_data: Additional error information.
If you want, you can rewrite the whole response body to anything you like:
```python
@app.error_processor
def my_error_processor(error):
body = {'error_detail': error.detail, **error.extra_data}
return body, error.status_code, error.headers
```
However, I would recommend keeping the `detail` in the response since it contains
the detailed information about the validation error when the validation error
happened.
*Version changed: 1.0*
- Apply this error processor to normal HTTP errors even when
`json_error` is set to `False` when creating `APIFlask` instance.
*Version changed: 0.7.0*
- Support registering an async callback function.
"""
if hasattr(self, 'ensure_sync'): # pragma: no cover
self.error_callback = self.ensure_sync(f)
else: # pragma: no cover
self.error_callback = f
self._apply_error_callback_to_werkzeug_errors()
return f
def _register_openapi_blueprint(self) -> None:
"""Register a blueprint for OpenAPI support.
The name of the blueprint is "openapi". This blueprint will hold the view
functions for spec file and API docs.
*Version changed: 1.1.0*
- Deprecate the redoc view at /redoc path.
*Version changed: 0.7.0*
- The format of the spec now rely on the `SPEC_FORMAT` config.
"""
bp = Blueprint(
'openapi',
__name__,
url_prefix=self.openapi_blueprint_url_prefix
)
if self.spec_path:
@bp.route(self.spec_path)
def spec():
if self.config['SPEC_FORMAT'] == 'json':
response = jsonify(self._get_spec('json'))
response.mimetype = self.config['JSON_SPEC_MIMETYPE']
return response
return self._get_spec('yaml'), 200, \
{'Content-Type': self.config['YAML_SPEC_MIMETYPE']}
if self.docs_path:
if self.docs_ui not in ui_templates:
valid_values = list(ui_templates.keys())
raise ValueError(
f'Invalid docs_ui value, expected one of {valid_values!r}, '
f'got {self.docs_ui!r}.'
)
@bp.route(self.docs_path)
def docs():
return render_template_string(
ui_templates[self.docs_ui],
title=self.title,
version=self.version,
oauth2_redirect_path=self.docs_oauth2_redirect_path
)
if self.docs_ui == 'swagger-ui':
if self.docs_oauth2_redirect_path:
@bp.route(self.docs_oauth2_redirect_path)
def swagger_ui_oauth_redirect() -> str:
return render_template_string(swagger_ui_oauth2_redirect_template)
if self.redoc_path:
@bp.route(self.redoc_path)
def redoc():
warnings.warn(
'The `/redoc` path and `redoc_path` parameter is deprecated '
'and will be removed in 2.0, Set `APIFlask(docs_ui="redoc")` '
'to use Redoc and then visit "/docs" instead.',
UserWarning,
stacklevel=2,
)
return render_template_string(
redoc_template,
title=self.title,
version=self.version
)
if self.enable_openapi and (
self.spec_path or self.docs_path or self.redoc_path
):
self.register_blueprint(bp)
def _get_spec(
self,
spec_format: t.Optional[str] = None,
force_update: bool = False
) -> t.Union[dict, str]:
"""Get the current OAS document file.
This method will return the cached spec on the first call. If you want
to get the latest spec, set the `force_update` to `True` or use the
public attribute `app.spec`, which will always return the newly generated
spec when you call it.
If the config `SYNC_LOCAL_SPEC` is `True`, the local spec
specified in config `LOCAL_SPEC_PATH` will be automatically updated
when the spec changes.
Arguments:
spec_format: The format of the spec file, one of `'json'`, `'yaml'`
and `'yml'`, defaults to the `SPEC_FORMAT` config.
force_update: If ture, will generate the spec for every call instead
of using the cache.
*Version changed: 0.7.0*
- The default format now rely on the `SPEC_FORMAT` config.
- Support to sync local spec file.
*Version changed: 0.7.1*
- Rename the method name to `_get_spec`.
- Add the `force_update` parameter.
"""
if spec_format is None:
spec_format = self.config['SPEC_FORMAT']
if self._spec is None or force_update:
if spec_format == 'json':
self._spec = self._generate_spec().to_dict()
else:
self._spec = self._generate_spec().to_yaml()
if self.spec_callback:
self._spec = self.spec_callback(self._spec) # type: ignore
# sync local spec
if self.config['SYNC_LOCAL_SPEC']:
spec_path = self.config['LOCAL_SPEC_PATH']
if spec_path is None:
raise TypeError(
'The spec path (LOCAL_SPEC_PATH) should be a valid path string.'
)
spec: str
if spec_format == 'json':
spec = json.dumps(
self._spec, indent=self.config['LOCAL_SPEC_JSON_INDENT']
)
else:
spec = str(self._spec)
with open(spec_path, 'w') as f:
f.write(spec)
return self._spec # type: ignore
def spec_processor(self, f: SpecCallbackType) -> SpecCallbackType:
"""A decorator to register a spec handler callback function.
You can register a function to update the spec. The callback function
should accept the spec as an argument and return it in the end. The
callback function will be called when generating the spec file.
Examples:
```python
@app.spec_processor
def update_spec(spec):
spec['info']['title'] = 'Updated Title'
return spec
```
Notice the format of the spec is depends on the the value of configuration
variable `SPEC_FORMAT` (defaults to `'json'`):
- `'json'` -> dict
- `'yaml'` -> string
*Version Changed: 0.7.0*
- Support registering an async callback function.
"""
if hasattr(self, 'ensure_sync'): # pragma: no cover
self.spec_callback = self.ensure_sync(f)
else: # pragma: no cover
self.spec_callback = f
return f
@property
def spec(self) -> t.Union[dict, str]:
"""Get the current OAS document file.
This property will call `app._get_spec()` method and set the
`force_update` parameter to `True`.
*Version changed: 0.7.1*
- Generate the spec on every call.
"""
return self._get_spec(force_update=True)
@staticmethod
def _schema_name_resolver(schema: t.Type[Schema]) -> str:
"""Default schema name resovler."""
name = schema.__class__.__name__
if name.endswith('Schema'):
name = name[:-6] or name
if schema.partial:
name += 'Update'
return name
def _make_info(self) -> dict:
"""Make OpenAPI info object."""
info: dict
if self.info:
info = self.info
else:
info = {}
if self.contact:
info['contact'] = self.contact
if self.license:
info['license'] = self.license
if self.terms_of_service:
info['termsOfService'] = self.terms_of_service
if self.description:
info['description'] = self.description
return info
def _make_tags(self) -> t.List[t.Dict[str, t.Any]]:
"""Make OpenAPI tags object."""
tags: t.Optional[TagsType] = self.tags
if tags is not None:
# convert simple tags list into standard OpenAPI tags
if isinstance(tags[0], str):
for index, tag_name in enumerate(tags):
tags[index] = {'name': tag_name} # type: ignore
else:
tags: t.List[t.Dict[str, t.Any]] = [] # type: ignore
if self.config['AUTO_TAGS']:
# auto-generate tags from blueprints
for blueprint_name, blueprint in self.blueprints.items():
if blueprint_name == 'openapi' or \
not hasattr(blueprint, 'enable_openapi') or \
not blueprint.enable_openapi: # type: ignore
continue
tag: t.Dict[str, t.Any] = get_tag(blueprint, blueprint_name) # type: ignore
tags.append(tag) # type: ignore
return tags # type: ignore
def _collect_security_info(self) -> t.Tuple[t.List[str], t.List[HTTPAuthType]]:
"""Detect `auth_required` on blueprint before_request functions and view functions."""
# security schemes
auth_names: t.List[str] = []
auth_schemes: t.List[HTTPAuthType] = []
def _update_auth_info(auth: HTTPAuthType) -> None:
# update auth_schemes and auth_names
auth_schemes.append(auth)
auth_name: str = get_auth_name(auth, auth_names)
auth_names.append(auth_name)
# collect auth info on blueprint before_request functions
for blueprint_name, funcs in self.before_request_funcs.items():
# skip app-level before_request functions (blueprint_name is None)
if blueprint_name is None or \
not self.blueprints[blueprint_name].enable_openapi: # type: ignore
continue
for f in funcs:
if hasattr(f, '_spec'): # pragma: no cover
auth = f._spec.get('auth') # type: ignore
if auth is not None and auth not in auth_schemes:
self._auth_blueprints[blueprint_name] = {
'auth': auth,
'roles': f._spec.get('roles') # type: ignore
}
_update_auth_info(auth)
# collect auth info on view functions
for rule in self.url_map.iter_rules():
view_func: ViewFuncType = self.view_functions[rule.endpoint] # type: ignore
if hasattr(view_func, '_spec'):
auth = view_func._spec.get('auth')
if auth is not None and auth not in auth_schemes:
_update_auth_info(auth)
# method views
if hasattr(view_func, '_method_spec'):
for method_spec in view_func._method_spec.values():
auth = method_spec.get('auth')
if auth is not None and auth not in auth_schemes:
_update_auth_info(auth)
return auth_names, auth_schemes
def _generate_spec(self) -> APISpec:
"""Generate the spec, return an instance of `apispec.APISpec`.
*Version changed: 1.2.1*
- Set default `servers` value.
*Version changed: 0.10.0*
- Add support for `operationId`.
- Add support for response `links`.
*Version changed: 0.9.0*
- Add base response customization support.
*Version changed: 0.8.0*
- Add automatic 404 response support.
"""
kwargs: dict = {}
if self.servers:
kwargs['servers'] = self.servers
else:
if self.config['AUTO_SERVERS'] and has_request_context():
kwargs['servers'] = [{'url': request.url_root}]
if self.external_docs:
kwargs['externalDocs'] = self.external_docs
ma_plugin: MarshmallowPlugin = MarshmallowPlugin(
schema_name_resolver=self.schema_name_resolver # type: ignore
)
spec_plugins: t.List[BasePlugin] = [ma_plugin, *self.spec_plugins]
spec: APISpec = APISpec(
title=self.title,
version=self.version,
openapi_version=self.config['OPENAPI_VERSION'],
plugins=spec_plugins,
info=self._make_info(),
tags=self._make_tags(),
**kwargs
)
# configure flask-marshmallow URL types
ma_plugin.converter.field_mapping[fields.URLFor] = ('string', 'url') # type: ignore
ma_plugin.converter.field_mapping[fields.AbsoluteURLFor] = ( # type: ignore
'string', 'url'
)
if sqla is not None: # pragma: no cover
ma_plugin.converter.field_mapping[sqla.HyperlinkRelated] = ( # type: ignore
'string', 'url'
)
auth_names, auth_schemes = self._collect_security_info()
security, security_schemes = get_security_and_security_schemes(
auth_names, auth_schemes
)
if self.config['SECURITY_SCHEMES'] is not None:
security_schemes.update(self.config['SECURITY_SCHEMES'])
for name, scheme in security_schemes.items():
spec.components.security_scheme(name, scheme)
# paths
paths: t.Dict[str, t.Dict[str, t.Any]] = {}
rules: t.List[t.Any] = sorted(
list(self.url_map.iter_rules()), key=lambda rule: len(rule.rule)
)
for rule in rules:
operations: t.Dict[str, t.Any] = {}
view_func: ViewFuncType = self.view_functions[rule.endpoint] # type: ignore
# skip endpoints from openapi blueprint and the built-in static endpoint
if rule.endpoint in default_bypassed_endpoints:
continue
blueprint_name: t.Optional[str] = None # type: ignore
if '.' in rule.endpoint:
blueprint_name: str = rule.endpoint.rsplit('.', 1)[0] # type: ignore
blueprint = self.blueprints.get(blueprint_name) # type: ignore
if blueprint is None:
# just a normal view with dots in its endpoint, reset blueprint_name
blueprint_name = None
else:
if rule.endpoint == (f'{blueprint_name}.static') or \
not hasattr(blueprint, 'enable_openapi') or \
not blueprint.enable_openapi: # type: ignore
continue
# add a default 200 response for bare views
if not hasattr(view_func, '_spec'):
if self.config['AUTO_200_RESPONSE']:
view_func._spec = {'response': default_response}
else:
continue # pragma: no cover
# method views
if hasattr(view_func, '_method_spec'):
skip = True
for method, method_spec in view_func._method_spec.items():
if method_spec.get('no_spec'):
if self.config['AUTO_200_RESPONSE']:
view_func._method_spec[method]['response'] = default_response
skip = False
else:
skip = False
if skip:
continue
# skip views flagged with @app.doc(hide=True)
if view_func._spec.get('hide'):
continue
# operation tags
operation_tags: t.Optional[t.List[str]] = None
if view_func._spec.get('tags'):
operation_tags = view_func._spec.get('tags')
else:
# use blueprint name as tag
if self.tags is None and self.config['AUTO_TAGS'] and \
blueprint_name is not None:
blueprint = self.blueprints[blueprint_name]
operation_tags = \
get_operation_tags(blueprint, blueprint_name) # type: ignore
for method in ['GET', 'POST', 'PUT', 'PATCH', 'DELETE']:
if method not in rule.methods:
continue
# method views
if hasattr(view_func, '_method_spec'):
if method not in view_func._method_spec:
continue # pragma: no cover
view_func._spec = view_func._method_spec[method]
if view_func._spec.get('no_spec') and \
not self.config['AUTO_200_RESPONSE']:
continue
if view_func._spec.get('generated_summary') and \
not self.config['AUTO_OPERATION_SUMMARY']:
view_func._spec['summary'] = ''
if view_func._spec.get('generated_description') and \
not self.config['AUTO_OPERATION_DESCRIPTION']:
view_func._spec['description'] = ''
if view_func._spec.get('hide'):
continue
if view_func._spec.get('tags'):
operation_tags = view_func._spec.get('tags')
else:
if self.tags is None and self.config['AUTO_TAGS'] and \
blueprint_name is not None:
blueprint = self.blueprints[blueprint_name]
operation_tags = \
get_operation_tags(blueprint, blueprint_name) # type: ignore
operation: t.Dict[str, t.Any] = {
'parameters': [
{'in': location, 'schema': schema}
for schema, location in view_func._spec.get('args', [])
],
'responses': {},
}
if operation_tags:
operation['tags'] = operation_tags
# summary
if view_func._spec.get('summary'):
operation['summary'] = view_func._spec.get('summary')
else:
# auto-generate summary from dotstring or view function name
if self.config['AUTO_OPERATION_SUMMARY']:
operation['summary'] = get_path_summary(view_func) # type: ignore
# description
if view_func._spec.get('description'):
operation['description'] = view_func._spec.get('description')
else:
# auto-generate description from dotstring
if self.config['AUTO_OPERATION_DESCRIPTION']:
docs = [
line.strip() for line in (view_func.__doc__ or '').strip().split('\n')
]
if len(docs) > 1:
# use the remain lines of docstring as description
operation['description'] = '\n'.join(docs[1:]).strip()
# deprecated
if view_func._spec.get('deprecated'):
operation['deprecated'] = view_func._spec.get('deprecated')
# operationId
operation_id = view_func._spec.get('operation_id')
if operation_id is None:
if self.config['AUTO_OPERATION_ID']:
operation['operationId'] = \
f"{method.lower()}_{rule.endpoint.replace('.', '_')}"
else:
operation['operationId'] = operation_id
# responses
if view_func._spec.get('response'):
schema = view_func._spec.get('response')['schema']
base_schema: OpenAPISchemaType = self.config['BASE_RESPONSE_SCHEMA']
if base_schema is not None:
base_schema_spec: dict
if isinstance(base_schema, type):
base_schema_spec = \
ma_plugin.converter.schema2jsonschema( # type: ignore
base_schema()
)
elif isinstance(base_schema, dict):
base_schema_spec = base_schema
else:
raise TypeError(_bad_schema_message)
data_key: str = self.config['BASE_RESPONSE_DATA_KEY']
if data_key not in base_schema_spec['properties']:
raise RuntimeError(
f'The data key {data_key!r} is not found in'
' the base response schema spec.'
)
base_schema_spec['properties'][data_key] = schema
schema = base_schema_spec
status_code: str = str(view_func._spec.get('response')['status_code'])
description: str = view_func._spec.get('response')['description'] or \
self.config['SUCCESS_DESCRIPTION']
example = view_func._spec.get('response')['example']
examples = view_func._spec.get('response')['examples']
links = view_func._spec.get('response')['links']
add_response(
operation, status_code, schema, description, example, examples, links
)
else:
# add a default 200 response for views without using @app.output
# or @app.doc(responses={...})
if not view_func._spec.get('responses') and self.config['AUTO_200_RESPONSE']:
add_response(
operation, '200', {}, self.config['SUCCESS_DESCRIPTION']
)
# add validation error response
if self.config['AUTO_VALIDATION_ERROR_RESPONSE'] and \
(view_func._spec.get('body') or view_func._spec.get('args')):
status_code: str = str( # type: ignore
self.config['VALIDATION_ERROR_STATUS_CODE']
)
description: str = self.config[ # type: ignore
'VALIDATION_ERROR_DESCRIPTION'
]
schema: SchemaType = self.config['VALIDATION_ERROR_SCHEMA'] # type: ignore
add_response_with_schema(
spec, operation, status_code, schema, 'ValidationError', description
)
# add authentication error response
has_bp_level_auth = blueprint_name is not None and \
blueprint_name in self._auth_blueprints
view_func_auth = view_func._spec.get('auth')
custom_security = view_func._spec.get('security')
if self.config['AUTO_AUTH_ERROR_RESPONSE'] and \
(has_bp_level_auth or view_func_auth or custom_security):
status_code: str = str( # type: ignore
self.config['AUTH_ERROR_STATUS_CODE']
)
description: str = self.config['AUTH_ERROR_DESCRIPTION'] # type: ignore
schema: SchemaType = self.config['HTTP_ERROR_SCHEMA'] # type: ignore
add_response_with_schema(
spec, operation, status_code, schema, 'HTTPError', description
)
# add 404 error response
if self.config['AUTO_404_RESPONSE'] and rule.arguments:
description: str = self.config['NOT_FOUND_DESCRIPTION'] # type: ignore
schema: SchemaType = self.config['HTTP_ERROR_SCHEMA'] # type: ignore
add_response_with_schema(
spec, operation, '404', schema, 'HTTPError', description
)
if view_func._spec.get('responses'):
responses: t.Union[t.List[int], t.Dict[int, str]] \
= view_func._spec.get('responses')
if isinstance(responses, list):
responses: t.Dict[int, str] = {} # type: ignore
for status_code in view_func._spec.get('responses'):
responses[ # type: ignore
status_code
] = get_reason_phrase(int(status_code), '')
for status_code, description in responses.items(): # type: ignore
status_code: str = str(status_code) # type: ignore
if status_code in operation['responses']:
if not isinstance(
view_func._spec.get('responses'), list
): # pragma: no cover
operation['responses'][status_code]['description'] = description
continue
if status_code.startswith('4') or status_code.startswith('5'):
# add error response schema for error responses
schema: SchemaType = self.config['HTTP_ERROR_SCHEMA'] # type: ignore
add_response_with_schema(
spec, operation, status_code, schema, 'HTTPError', description
)
else:
add_response(operation, status_code, {}, description)
# requestBody
if view_func._spec.get('body'):
content_type = view_func._spec.get('content_type', 'application/json')
operation['requestBody'] = {
'content': {
content_type: {
'schema': view_func._spec['body'],
}
}
}
if view_func._spec.get('body_example'):
example = view_func._spec.get('body_example')
operation['requestBody']['content'][
content_type]['example'] = example
if view_func._spec.get('body_examples'):
examples = view_func._spec.get('body_examples')
operation['requestBody']['content'][
content_type]['examples'] = examples
# security
if custom_security: # custom security
# TODO: validate the security name and the format
operation['security'] = []
operation_security = custom_security
if isinstance(operation_security, str): # 'A' -> [{'A': []}]
operation['security'] = [{operation_security: []}]
elif isinstance(operation_security, list):
# ['A', 'B'] -> [{'A': []}, {'B': []}]
if isinstance(operation_security[0], str):
operation['security'] = [{name: []} for name in operation_security]
else:
operation['security'] = operation_security
else:
raise ValueError(
'The operation security must be a string or a list.'
)
else:
if has_bp_level_auth:
bp_auth_info = self._auth_blueprints[blueprint_name] # type: ignore
operation['security'] = [{
security[bp_auth_info['auth']]: bp_auth_info['roles']
}]
# view-wide auth
if view_func_auth:
operation['security'] = [{
security[view_func_auth]: view_func._spec['roles']
}]
operations[method.lower()] = operation
# parameters
path_arguments: t.Iterable = re.findall(r'<(([^<:]+:)?([^>]+))>', rule.rule)
if (
path_arguments
and not (
hasattr(view_func, '_spec')
and view_func._spec.get('omit_default_path_parameters', False)
)
):
arguments: t.List[t.Dict[str, str]] = []
for _, argument_type, argument_name in path_arguments:
argument = get_argument(argument_type, argument_name)
arguments.append(argument)
for _method, operation in operations.items():
operation['parameters'] = arguments + operation['parameters']
path: str = re.sub(r'<([^<:]+:)?', '{', rule.rule).replace('>', '}')
if path not in paths:
paths[path] = operations
else:
paths[path].update(operations)
for path, operations in paths.items():
# sort by method before adding them to the spec
sorted_operations: t.Dict[str, t.Any] = {}
for method in ['get', 'post', 'put', 'patch', 'delete']:
if method in operations:
sorted_operations[method] = operations[method]
# TODO: remove the type ignore comment when apispec 5.3.0 released
spec.path(path=path, operations=sorted_operations) # type: ignore
return spec
spec: Union[dict, str]
property
readonly
¶
Get the current OAS document file.
This property will call app._get_spec() method and set the
force_update parameter to True.
Version changed: 0.7.1
- Generate the spec on every call.
__init__(self, import_name, title='APIFlask', version='0.1.0', spec_path='/openapi.json', docs_path='/docs', docs_oauth2_redirect_path='/docs/oauth2-redirect', docs_ui='swagger-ui', redoc_path='/redoc', openapi_blueprint_url_prefix=None, json_errors=True, enable_openapi=True, spec_plugins=None, static_url_path=None, static_folder='static', static_host=None, host_matching=False, subdomain_matching=False, template_folder='templates', instance_path=None, instance_relative_config=False, root_path=None)
special
¶
Make an app instance.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
import_name |
str |
The name of the application package, usually
|
required |
title |
str |
The title of the API (openapi.info.title), defaults to "APIFlask". You can change it to the name of your API (e.g., "Pet API"). |
'APIFlask' |
version |
str |
The version of the API (openapi.info.version), defaults to "0.1.0". |
'0.1.0' |
spec_path |
Optional[str] |
The path to OpenAPI Spec documentation. It
defaults to |
'/openapi.json' |
docs_path |
Optional[str] |
The path to API UI documentation, defaults to |
'/docs' |
docs_ui |
str |
The UI of API documentation, one of |
'swagger-ui' |
docs_oauth2_redirect_path |
Optional[str] |
The path to Swagger UI OAuth redirect. |
'/docs/oauth2-redirect' |
redoc_path |
Optional[str] |
Deprecated since 1.1, set |
'/redoc' |
openapi_blueprint_url_prefix |
Optional[str] |
The url prefix of the OpenAPI blueprint. This
prefix will append before all the OpenAPI-related paths ( |
None |
json_errors |
bool |
If |
True |
enable_openapi |
bool |
If |
True |
spec_plugins |
Optional[List[apispec.plugin.BasePlugin]] |
List of apispec-compatible plugins (subclasses of |
None |
Other keyword arguments are directly passed to flask.Flask.
Version changed: 1.2.0
- Add
spec_pluginsparameter.
Version changed: 1.1.0
- Add
docs_uiparameter.
Version changed: 0.7.0
- Add
openapi_blueprint_url_prefixparameter.
Source code in apiflask/app.py
def __init__(
self,
import_name: str,
title: str = 'APIFlask',
version: str = '0.1.0',
spec_path: t.Optional[str] = '/openapi.json',
docs_path: t.Optional[str] = '/docs',
docs_oauth2_redirect_path: t.Optional[str] = '/docs/oauth2-redirect',
docs_ui: str = 'swagger-ui',
redoc_path: t.Optional[str] = '/redoc',
openapi_blueprint_url_prefix: t.Optional[str] = None,
json_errors: bool = True,
enable_openapi: bool = True,
spec_plugins: t.Optional[t.List[BasePlugin]] = None,
static_url_path: t.Optional[str] = None,
static_folder: str = 'static',
static_host: t.Optional[str] = None,
host_matching: bool = False,
subdomain_matching: bool = False,
template_folder: str = 'templates',
instance_path: t.Optional[str] = None,
instance_relative_config: bool = False,
root_path: t.Optional[str] = None
) -> None:
"""Make an app instance.
Arguments:
import_name: The name of the application package, usually
`__name__`. This helps locate the `root_path` for the
application.
title: The title of the API (openapi.info.title), defaults to "APIFlask".
You can change it to the name of your API (e.g., "Pet API").
version: The version of the API (openapi.info.version), defaults to "0.1.0".
spec_path: The path to OpenAPI Spec documentation. It
defaults to `/openapi.json`, if the path ends with `.yaml`
or `.yml`, the YAML format of the OAS will be returned.
docs_path: The path to API UI documentation, defaults to `/docs`.
docs_ui: The UI of API documentation, one of `swagger-ui` (default), `redoc`,
`elements`, `rapidoc`, and `rapipdf`.
docs_oauth2_redirect_path: The path to Swagger UI OAuth redirect.
redoc_path: Deprecated since 1.1, set `APIFlask(docs_ui='redoc')` to use Redoc.
The path to Redoc documentation, defaults to `/redoc`.
openapi_blueprint_url_prefix: The url prefix of the OpenAPI blueprint. This
prefix will append before all the OpenAPI-related paths (`sepc_path`,
`docs_path`, etc.), defaults to `None`.
json_errors: If `True`, APIFlask will return a JSON response for HTTP errors.
enable_openapi: If `False`, will disable OpenAPI spec and API docs views.
spec_plugins: List of apispec-compatible plugins (subclasses of `apispec.BasePlugin`),
defaults to `None`. The `MarshmallowPlugin` for apispec is already included
by default, so it doesn't need to be provided here.
Other keyword arguments are directly passed to `flask.Flask`.
*Version changed: 1.2.0*
- Add `spec_plugins` parameter.
*Version changed: 1.1.0*
- Add `docs_ui` parameter.
*Version changed: 0.7.0*
- Add `openapi_blueprint_url_prefix` parameter.
"""
super().__init__(
import_name,
static_url_path=static_url_path,
static_folder=static_folder,
static_host=static_host,
host_matching=host_matching,
subdomain_matching=subdomain_matching,
template_folder=template_folder,
instance_path=instance_path,
instance_relative_config=instance_relative_config,
root_path=root_path
)
# Set default config
self.config.from_object('apiflask.settings')
self.title = title
self.version = version
self.spec_path = spec_path
self.docs_ui = docs_ui
self.docs_path = docs_path
self.redoc_path = redoc_path
self.docs_oauth2_redirect_path = docs_oauth2_redirect_path
self.openapi_blueprint_url_prefix = openapi_blueprint_url_prefix
self.enable_openapi = enable_openapi
self.json_errors = json_errors
self.spec_callback: t.Optional[SpecCallbackType] = None
self.error_callback: ErrorCallbackType = self._error_handler
self.schema_name_resolver = self._schema_name_resolver
self.spec_plugins: t.List[BasePlugin] = spec_plugins or []
self._spec: t.Optional[t.Union[dict, str]] = None
self._auth_blueprints: t.Dict[str, t.Dict[str, t.Any]] = {}
self._register_openapi_blueprint()
self._register_error_handlers()
add_url_rule(self, rule, endpoint=None, view_func=None, provide_automatic_options=None, **options)
¶
Record the spec for view classes before calling the actual add_url_rule method.
When calling this method directly, the view_func argument can be a view function or
a view function created by ViewClass.as_view(). It only accepts a view class when
using the route decorator on a view class.
Source code in apiflask/app.py
def add_url_rule(
self,
rule: str,
endpoint: t.Optional[str] = None,
view_func: t.Optional[ViewFuncOrClassType] = None,
provide_automatic_options: t.Optional[bool] = None,
**options: t.Any,
):
"""Record the spec for view classes before calling the actual `add_url_rule` method.
When calling this method directly, the `view_func` argument can be a view function or
a view function created by `ViewClass.as_view()`. It only accepts a view class when
using the route decorator on a view class.
"""
if isinstance(view_func, type):
# call as_view() for MethodView passed with @route
if endpoint is None:
endpoint = view_func.__name__
view_func = view_func.as_view(endpoint) # type: ignore
if hasattr(view_func, 'view_class'):
# view function created with MethodViewClass.as_view()
view_class = view_func.view_class # type: ignore
if not issubclass(view_class, MethodView):
# skip View-based class
view_func._spec = {'hide': True} # type: ignore
else:
# record spec for MethodView class
if hasattr(self, 'enable_openapi') and self.enable_openapi:
view_func = record_spec_for_view_class(view_func, view_class) # type: ignore
# view func created by Flask's View only accpets keyword arguments
if issubclass(view_class, FlaskView):
view_func._only_kwargs = True # type: ignore
if issubclass(view_class, FlaskMethodView):
raise RuntimeError(
'APIFlask only supports generating OpenAPI spec for view classes created '
'with apiflask.views.MethodView (`from apiflask.views import MethodView`).',
)
super(cls, self).add_url_rule(
rule,
endpoint,
view_func,
provide_automatic_options=provide_automatic_options,
**options
)
dispatch_request(self)
¶
Overwrite the default dispatch method in Flask.
With this overwrite, view arguments are passed as positional arguments so that the view function can intuitively accept the parameters (i.e., from top to bottom, from left to right).
Examples:
@app.get('/pets/<name>/<int:pet_id>/<age>') # -> name, pet_id, age
@app.input(Query) # -> query
@app.output(Pet) # -> pet
def get_pet(name, pet_id, age, query, pet):
pass
From Flask, see the NOTICE file for license information.
Version added: 0.2.0
Source code in apiflask/app.py
def dispatch_request(self) -> ResponseReturnValueType: # type: ignore
"""Overwrite the default dispatch method in Flask.
With this overwrite, view arguments are passed as positional
arguments so that the view function can intuitively accept the
parameters (i.e., from top to bottom, from left to right).
Examples:
```python
@app.get('/pets/<name>/<int:pet_id>/<age>') # -> name, pet_id, age
@app.input(Query) # -> query
@app.output(Pet) # -> pet
def get_pet(name, pet_id, age, query, pet):
pass
```
From Flask, see the NOTICE file for license information.
*Version added: 0.2.0*
"""
req = request_ctx.request if request_ctx else _request_ctx_stack.top.request # type: ignore
if req.routing_exception is not None:
self.raise_routing_exception(req)
rule = req.url_rule
# if we provide automatic options for this URL and the
# request came with the OPTIONS method, reply automatically
if ( # pragma: no cover
getattr(rule, 'provide_automatic_options', False)
and req.method == 'OPTIONS'
):
return self.make_default_options_response() # pragma: no cover
# otherwise dispatch to the handler for that endpoint
view_function = self.view_functions[rule.endpoint]
if hasattr(self, 'ensure_sync'): # pragma: no cover
view_function = self.ensure_sync(view_function)
if rule.endpoint == 'static' or hasattr(view_function, '_only_kwargs'):
# app static route only accepts keyword arguments, see flask#3762
# view classes created by Flask only accept keyword arguments
return view_function(**req.view_args) # type: ignore
else:
return view_function(*req.view_args.values()) # type: ignore
error_processor(self, f)
¶
A decorator to register a custom error response processor function.
The decorated callback function will be called in the following situations:
- Any HTTP exception is raised by Flask when handling request.
- A validation error happened when parsing a request.
- An exception triggered with
HTTPError - An exception triggered with
abort.
You can still register a specific error handler for a specific error code
or exception with the app.errorhandler(code_or_exection) decorator,
in that case, the return value of the specific error handler will be used as the
response when the corresponding error or exception happened.
The callback function must accept an error object as argument and return a valid response.
Examples:
@app.error_processor
def my_error_processor(error):
return {
'status_code': error.status_code,
'message': error.message,
'detail': error.detail,
**error.extra_data
}, error.status_code, error.headers
The error object is an instance of HTTPError,
so you can get error information via it's attributes:
- status_code: If the error is triggered by a validation error, the value will be
422 (default) or the value you passed in config
VALIDATION_ERROR_STATUS_CODE. If the error is triggered byHTTPErrororabort, it will be the status code you passed. Otherwise, it will be the status code set by Werkzueg when processing the request. - message: The error description for this error, either you passed or grabbed from Werkzeug.
-
detail: The detail of the error. When the validation error happens, it will be filled automatically in the following structure:
"<location>": { "<field_name>": ["<error_message>", ...], "<field_name>": ["<error_message>", ...], ... }, "<location>": { ... }, ...
The value of location can be json (i.e., request body) or query
(i.e., query string) depending on the place where the validation error
happened.
- headers: The value will be {} unless you pass it in HTTPError or abort.
- extra_data: Additional error information.
If you want, you can rewrite the whole response body to anything you like:
@app.error_processor
def my_error_processor(error):
body = {'error_detail': error.detail, **error.extra_data}
return body, error.status_code, error.headers
However, I would recommend keeping the detail in the response since it contains
the detailed information about the validation error when the validation error
happened.
Version changed: 1.0
- Apply this error processor to normal HTTP errors even when
json_erroris set toFalsewhen creatingAPIFlaskinstance.
Version changed: 0.7.0
- Support registering an async callback function.
Source code in apiflask/app.py
def error_processor(
self,
f: ErrorCallbackType
) -> ErrorCallbackType:
"""A decorator to register a custom error response processor function.
The decorated callback function will be called in the following situations:
- Any HTTP exception is raised by Flask when handling request.
- A validation error happened when parsing a request.
- An exception triggered with [`HTTPError`][apiflask.exceptions.HTTPError]
- An exception triggered with [`abort`][apiflask.exceptions.abort].
You can still register a specific error handler for a specific error code
or exception with the `app.errorhandler(code_or_exection)` decorator,
in that case, the return value of the specific error handler will be used as the
response when the corresponding error or exception happened.
The callback function must accept an error object as argument and return a valid
response.
Examples:
```python
@app.error_processor
def my_error_processor(error):
return {
'status_code': error.status_code,
'message': error.message,
'detail': error.detail,
**error.extra_data
}, error.status_code, error.headers
```
The error object is an instance of [`HTTPError`][apiflask.exceptions.HTTPError],
so you can get error information via it's attributes:
- status_code: If the error is triggered by a validation error, the value will be
422 (default) or the value you passed in config `VALIDATION_ERROR_STATUS_CODE`.
If the error is triggered by [`HTTPError`][apiflask.exceptions.HTTPError]
or [`abort`][apiflask.exceptions.abort], it will be the status code
you passed. Otherwise, it will be the status code set by Werkzueg when
processing the request.
- message: The error description for this error, either you passed or grabbed from
Werkzeug.
- detail: The detail of the error. When the validation error happens, it will
be filled automatically in the following structure:
```python
"<location>": {
"<field_name>": ["<error_message>", ...],
"<field_name>": ["<error_message>", ...],
...
},
"<location>": {
...
},
...
```
The value of `location` can be `json` (i.e., request body) or `query`
(i.e., query string) depending on the place where the validation error
happened.
- headers: The value will be `{}` unless you pass it in `HTTPError` or `abort`.
- extra_data: Additional error information.
If you want, you can rewrite the whole response body to anything you like:
```python
@app.error_processor
def my_error_processor(error):
body = {'error_detail': error.detail, **error.extra_data}
return body, error.status_code, error.headers
```
However, I would recommend keeping the `detail` in the response since it contains
the detailed information about the validation error when the validation error
happened.
*Version changed: 1.0*
- Apply this error processor to normal HTTP errors even when
`json_error` is set to `False` when creating `APIFlask` instance.
*Version changed: 0.7.0*
- Support registering an async callback function.
"""
if hasattr(self, 'ensure_sync'): # pragma: no cover
self.error_callback = self.ensure_sync(f)
else: # pragma: no cover
self.error_callback = f
self._apply_error_callback_to_werkzeug_errors()
return f
make_response(self, rv)
¶
Patch the make_response form Flask to allow returning list as JSON.
Version added: 1.1.0
Source code in apiflask/app.py
def make_response(self, rv) -> Response:
"""Patch the make_response form Flask to allow returning list as JSON.
*Version added: 1.1.0*
"""
if isinstance(rv, list):
rv = jsonify(rv)
elif isinstance(rv, tuple) and isinstance(rv[0], list):
rv = (jsonify(rv[0]), *rv[1:])
return super().make_response(rv)
spec_processor(self, f)
¶
A decorator to register a spec handler callback function.
You can register a function to update the spec. The callback function should accept the spec as an argument and return it in the end. The callback function will be called when generating the spec file.
Examples:
@app.spec_processor
def update_spec(spec):
spec['info']['title'] = 'Updated Title'
return spec
Notice the format of the spec is depends on the the value of configuration
variable SPEC_FORMAT (defaults to 'json'):
'json'-> dict'yaml'-> string
Version Changed: 0.7.0
- Support registering an async callback function.
Source code in apiflask/app.py
def spec_processor(self, f: SpecCallbackType) -> SpecCallbackType:
"""A decorator to register a spec handler callback function.
You can register a function to update the spec. The callback function
should accept the spec as an argument and return it in the end. The
callback function will be called when generating the spec file.
Examples:
```python
@app.spec_processor
def update_spec(spec):
spec['info']['title'] = 'Updated Title'
return spec
```
Notice the format of the spec is depends on the the value of configuration
variable `SPEC_FORMAT` (defaults to `'json'`):
- `'json'` -> dict
- `'yaml'` -> string
*Version Changed: 0.7.0*
- Support registering an async callback function.
"""
if hasattr(self, 'ensure_sync'): # pragma: no cover
self.spec_callback = self.ensure_sync(f)
else: # pragma: no cover
self.spec_callback = f
return f
APIScaffold¶
A base class for APIFlask and
APIBlueprint.
This class contains the route shortcut decorators (i.e. get, post, etc.) and
API-related decorators (i.e. auth_required, input, output, doc).
Version added: 1.0
Source code in apiflask/scaffold.py
class APIScaffold:
"""A base class for [`APIFlask`][apiflask.app.APIFlask] and
[`APIBlueprint`][apiflask.blueprint.APIBlueprint].
This class contains the route shortcut decorators (i.e. `get`, `post`, etc.) and
API-related decorators (i.e. `auth_required`, `input`, `output`, `doc`).
*Version added: 1.0*
"""
def _method_route(self, method: str, rule: str, options: t.Any):
if 'methods' in options:
raise RuntimeError('Use the "route" decorator to use the "methods" argument.')
def decorator(f):
if isinstance(f, type(MethodView)):
raise RuntimeError(
'The route shortcuts cannot be used with "MethodView" classes, '
'use the "route" decorator instead.'
)
return self.route(rule, methods=[method], **options)(f)
return decorator
def get(self, rule: str, **options: t.Any):
"""Shortcut for `app.route()` or `app.route(methods=['GET'])`."""
return self._method_route('GET', rule, options)
def post(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['POST'])`."""
return self._method_route('POST', rule, options)
def put(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['PUT'])`."""
return self._method_route('PUT', rule, options)
def patch(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['PATCH'])`."""
return self._method_route('PATCH', rule, options)
def delete(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['DELETE'])`."""
return self._method_route('DELETE', rule, options)
def auth_required(
self,
auth: HTTPAuthType,
role: t.Optional[str] = None,
roles: t.Optional[list] = None,
optional: t.Optional[str] = None
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Protect a view with provided authentication settings.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
Examples:
```python
from apiflask import APIFlask, HTTPTokenAuth
app = APIFlask(__name__)
auth = HTTPTokenAuth()
@app.get('/')
@app.auth_required(auth)
def hello():
return 'Hello'!
```
Arguments:
auth: The `auth` object, an instance of
[`HTTPBasicAuth`][apiflask.security.HTTPBasicAuth]
or [`HTTPTokenAuth`][apiflask.security.HTTPTokenAuth].
role: Deprecated since 1.0, use `roles` instead.
roles: The selected roles to allow to visit this view, accepts a list of role names.
See [Flask-HTTPAuth's documentation][_role]{target:_blank} for more details.
[_role]: https://flask-httpauth.readthedocs.io/en/latest/#user-roles
optional: Set to `True` to allow the view to execute even the authentication
information is not included with the request, in which case the attribute
`auth.current_user` will be `None`.
*Version changed: 1.0.0*
- The `role` parameter is deprecated.
*Version changed: 0.12.0*
- Move to `APIFlask` and `APIBlueprint` classes.
*Version changed: 0.4.0*
- Add parameter `roles`.
"""
_roles = None
if role is not None:
warnings.warn(
'The `role` parameter is deprecated and will be removed in 1.1, '
'use `roles` and always pass a list instead.',
DeprecationWarning,
stacklevel=3,
)
_roles = [role]
elif roles is not None:
_roles = roles
def decorator(f):
f = _ensure_sync(f)
_annotate(f, auth=auth, roles=_roles or [])
return auth.login_required(role=_roles, optional=optional)(f)
return decorator
def input(
self,
schema: SchemaType,
location: str = 'json',
schema_name: t.Optional[str] = None,
example: t.Optional[t.Any] = None,
examples: t.Optional[t.Dict[str, t.Any]] = None,
**kwargs: t.Any
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Add input settings for view functions.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
If the validation passed, the data will inject into view
function as a positional argument in the form of `dict`. Otherwise,
an error response with the detail of the validation result will be returned.
Examples:
```python
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.input(PetIn)
def hello(parsed_and_validated_input_data):
print(parsed_and_validated_input_data)
return 'Hello'!
```
Arguments:
schema: The marshmallow schema of the input data.
location: The location of the input data, one of `'json'` (default),
`'files'`, `'form'`, `'cookies'`, `'headers'`, `'query'`
(same as `'querystring'`).
schema_name: The schema name for dict schema, only needed when you pass
a schema dict (e.g., `{'name': String(required=True)}`) for `json`
location.
example: The example data in dict for request body, you should use either
`example` or `examples`, not both.
examples: Multiple examples for request body, you should pass a dict
that contains multiple examples. Example:
```python
{
'example foo': { # example name
'summary': 'an example of foo', # summary field is optional
'value': {'name': 'foo', 'id': 1} # example value
},
'example bar': {
'summary': 'an example of bar',
'value': {'name': 'bar', 'id': 2}
},
}
```
*Version changed: 1.0*
- Ensure only one input body location was used.
- Add `form_and_files` and `json_or_form` (from webargs) location.
- Rewrite `files` to act as `form_and_files`.
- Use correct request content type for `form` and `files`.
*Version changed: 0.12.0*
- Move to APIFlask and APIBlueprint classes.
*Version changed: 0.4.0*
- Add parameter `examples`.
"""
if isinstance(schema, ABCMapping):
schema = _generate_schema_from_mapping(schema, schema_name)
if isinstance(schema, type): # pragma: no cover
schema = schema()
def decorator(f):
f = _ensure_sync(f)
is_body_location = location in BODY_LOCATIONS
if is_body_location and hasattr(f, '_spec') and 'body' in f._spec:
raise RuntimeError(
'When using the app.input() decorator, you can only declare one request '
'body location (one of "json", "form", "files", "form_and_files", '
'and "json_or_form").'
)
if location == 'json':
_annotate(f, body=schema, body_example=example, body_examples=examples)
elif location == 'form':
_annotate(
f,
body=schema,
body_example=example,
body_examples=examples,
content_type='application/x-www-form-urlencoded'
)
elif location in ['files', 'form_and_files']:
_annotate(
f,
body=schema,
body_example=example,
body_examples=examples,
content_type='multipart/form-data'
)
else:
if not hasattr(f, '_spec') or f._spec.get('args') is None:
_annotate(f, args=[])
if location == 'path':
_annotate(f, omit_default_path_parameters=True)
# TODO: Support set example for request parameters
f._spec['args'].append((schema, location))
return use_args(schema, location=location, **kwargs)(f)
return decorator
def output(
self,
schema: SchemaType,
status_code: int = 200,
description: t.Optional[str] = None,
schema_name: t.Optional[str] = None,
example: t.Optional[t.Any] = None,
examples: t.Optional[t.Dict[str, t.Any]] = None,
links: t.Optional[t.Dict[str, t.Any]] = None,
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Add output settings for view functions.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
The decorator will format the return value of your view function with
provided marshmallow schema. You can return a dict or an object (such
as a model class instance of ORMs). APIFlask will handle the formatting
and turn your return value into a JSON response.
P.S. The output data will not be validated; it's a design choice of marshmallow.
marshmallow 4.0 may be support the output validation.
Examples:
```python
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.output(PetOut)
def hello():
return the_dict_or_object_match_petout_schema
```
Arguments:
schema: The schemas of the output data.
status_code: The status code of the response, defaults to `200`.
description: The description of the response.
schema_name: The schema name for dict schema, only needed when you pass
a schema dict (e.g., `{'name': String()}`).
example: The example data in dict for response body, you should use either
`example` or `examples`, not both.
examples: Multiple examples for response body, you should pass a dict
that contains multiple examples. Example:
```python
{
'example foo': { # example name
'summary': 'an example of foo', # summary field is optional
'value': {'name': 'foo', 'id': 1} # example value
},
'example bar': {
'summary': 'an example of bar',
'value': {'name': 'bar', 'id': 2}
},
}
```
links: The `links` of response. It accepts a dict which maps a link name to
a link object. Example:
```python
{
'getAddressByUserId': {
'operationId': 'getUserAddress',
'parameters': {
'userId': '$request.path.id'
}
}
}
```
See the [docs](https://apiflask.com/openapi/#response-links) for more details
about setting response links.
*Version changed: 0.12.0*
- Move to APIFlask and APIBlueprint classes.
*Version changed: 0.10.0*
- Add `links` parameter.
*Version changed: 0.9.0*
- Add base response customization support.
*Version changed: 0.6.0*
- Support decorating async views.
*Version changed: 0.5.2*
- Return the `Response` object directly.
*Version changed: 0.4.0*
- Add parameter `examples`.
"""
if schema == {}:
schema = EmptySchema
if isinstance(schema, ABCMapping):
schema = _generate_schema_from_mapping(schema, schema_name)
if isinstance(schema, type): # pragma: no cover
schema = schema()
if isinstance(schema, EmptySchema):
status_code = 204
def decorator(f):
f = _ensure_sync(f)
_annotate(f, response={
'schema': schema,
'status_code': status_code,
'description': description,
'example': example,
'examples': examples,
'links': links,
})
def _jsonify(
obj: t.Any,
many: bool = _sentinel, # type: ignore
*args: t.Any,
**kwargs: t.Any
) -> Response: # pragma: no cover
"""From Flask-Marshmallow, see the NOTICE file for license information."""
if many is _sentinel:
many = schema.many # type: ignore
base_schema: OpenAPISchemaType = current_app.config['BASE_RESPONSE_SCHEMA']
if base_schema is not None and status_code != 204:
data_key: str = current_app.config['BASE_RESPONSE_DATA_KEY']
if data_key not in obj:
raise RuntimeError(
f'The data key {data_key!r} is not found in the returned dict.'
)
obj[data_key] = schema.dump(obj[data_key], many=many) # type: ignore
data = base_schema().dump(obj) # type: ignore
else:
data = schema.dump(obj, many=many) # type: ignore
return jsonify(data, *args, **kwargs)
@wraps(f)
def _response(*args: t.Any, **kwargs: t.Any) -> ResponseReturnValueType:
rv = f(*args, **kwargs)
if isinstance(rv, Response):
return rv
if not isinstance(rv, tuple):
return _jsonify(rv), status_code
json = _jsonify(rv[0])
if len(rv) == 2:
rv = (json, rv[1]) if isinstance(rv[1], int) else (json, status_code, rv[1])
elif len(rv) >= 3:
rv = (json, rv[1], rv[2])
else:
rv = (json, status_code)
return rv # type: ignore
return _response
return decorator
def doc(
self,
summary: t.Optional[str] = None,
description: t.Optional[str] = None,
tag: t.Optional[str] = None,
tags: t.Optional[t.List[str]] = None,
responses: t.Optional[t.Union[t.List[int], t.Dict[int, str]]] = None,
deprecated: t.Optional[bool] = None,
hide: t.Optional[bool] = None,
operation_id: t.Optional[str] = None,
security: t.Optional[t.Union[str, t.List[t.Union[str, t.Dict[str, list]]]]] = None,
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Set up the OpenAPI Spec for view functions.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
Examples:
```python
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.doc(summary='Say hello', tags=['Foo'])
def hello():
return 'Hello'
```
Arguments:
summary: The summary of this endpoint. If not set, the name of the view function
will be used. If your view function is named with `get_pet`, then the summary
will be "Get Pet". If the view function has a docstring, then the first
line of the docstring will be used. The precedence will be:
```
@app.doc(summary='blah') > the first line of docstring > the view function name
```
description: The description of this endpoint. If not set, the lines after the empty
line of the docstring will be used.
tag: Deprecated since 1.0, use `tags` instead.
tags: A list of tag names of this endpoint, map the tags you passed in the `app.tags`
attribute. If `app.tags` is not set, the blueprint name will be used as tag name.
responses: The other responses for this view function, accepts a dict in a format
of `{404: 'Not Found'}` or a list of status code (`[404, 418]`). If pass a dict,
and a response with the same status code is already exist, the existing
description will be overwritten.
deprecated: Flag this endpoint as deprecated in API docs.
hide: Hide this endpoint in API docs.
operation_id: The `operationId` of this endpoint. Set config `AUTO_OPERATION_ID` to
`True` to enable the auto-generating of operationId (in the format of
`{method}_{endpoint}`).
security: The `security` used for this endpoint. Match the security info specified in
the `SECURITY_SCHEMES` configuration. If you don't need specify the scopes, just
pass a security name (equals to `[{'foo': []}]`) or a list of security names (equals
to `[{'foo': []}, {'bar': []}]`).
*Version changed: 1.0*
- Add `security` parameter to support customizing security info.
- The `role` parameter is deprecated.
*Version changed: 0.12.0*
- Move to `APIFlask` and `APIBlueprint` classes.
*Version changed: 0.10.0*
- Add parameter `operation_id`.
*Version changed: 0.5.0*
- Change the default value of parameters `hide` and `deprecated` from `False` to `None`.
*Version changed: 0.4.0*
- Add parameter `tag`.
*Version changed: 0.3.0*
- Change the default value of `deprecated` from `None` to `False`.
- Rename parameter `tags` to `tag`.
*Version added: 0.2.0*
"""
_tags = None
if tag is not None:
warnings.warn(
'The `tag` parameter is deprecated and will be removed in 1.1, '
'use `tags` and always pass a list instead.',
DeprecationWarning,
stacklevel=2,
)
_tags = [tag]
elif tags is not None:
_tags = tags
def decorator(f):
f = _ensure_sync(f)
_annotate(
f,
summary=summary,
description=description,
tags=_tags,
responses=responses,
deprecated=deprecated,
hide=hide,
operation_id=operation_id,
security=security,
)
return f
return decorator
auth_required(self, auth, role=None, roles=None, optional=None)
¶
Protect a view with provided authentication settings.
Be sure to put it under the routes decorators (i.e.,
app.route,app.get,app.post, etc.).
Examples:
from apiflask import APIFlask, HTTPTokenAuth
app = APIFlask(__name__)
auth = HTTPTokenAuth()
@app.get('/')
@app.auth_required(auth)
def hello():
return 'Hello'!
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
auth |
Union[HTTPBasicAuth, HTTPTokenAuth] |
The |
required |
role |
Optional[str] |
Deprecated since 1.0, use |
None |
roles |
Optional[list] |
The selected roles to allow to visit this view, accepts a list of role names. See Flask-HTTPAuth's documentation for more details. |
None |
optional |
Optional[str] |
Set to |
None |
Version changed: 1.0.0
- The
roleparameter is deprecated.
Version changed: 0.12.0
- Move to
APIFlaskandAPIBlueprintclasses.
Version changed: 0.4.0
- Add parameter
roles.
Source code in apiflask/scaffold.py
def auth_required(
self,
auth: HTTPAuthType,
role: t.Optional[str] = None,
roles: t.Optional[list] = None,
optional: t.Optional[str] = None
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Protect a view with provided authentication settings.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
Examples:
```python
from apiflask import APIFlask, HTTPTokenAuth
app = APIFlask(__name__)
auth = HTTPTokenAuth()
@app.get('/')
@app.auth_required(auth)
def hello():
return 'Hello'!
```
Arguments:
auth: The `auth` object, an instance of
[`HTTPBasicAuth`][apiflask.security.HTTPBasicAuth]
or [`HTTPTokenAuth`][apiflask.security.HTTPTokenAuth].
role: Deprecated since 1.0, use `roles` instead.
roles: The selected roles to allow to visit this view, accepts a list of role names.
See [Flask-HTTPAuth's documentation][_role]{target:_blank} for more details.
[_role]: https://flask-httpauth.readthedocs.io/en/latest/#user-roles
optional: Set to `True` to allow the view to execute even the authentication
information is not included with the request, in which case the attribute
`auth.current_user` will be `None`.
*Version changed: 1.0.0*
- The `role` parameter is deprecated.
*Version changed: 0.12.0*
- Move to `APIFlask` and `APIBlueprint` classes.
*Version changed: 0.4.0*
- Add parameter `roles`.
"""
_roles = None
if role is not None:
warnings.warn(
'The `role` parameter is deprecated and will be removed in 1.1, '
'use `roles` and always pass a list instead.',
DeprecationWarning,
stacklevel=3,
)
_roles = [role]
elif roles is not None:
_roles = roles
def decorator(f):
f = _ensure_sync(f)
_annotate(f, auth=auth, roles=_roles or [])
return auth.login_required(role=_roles, optional=optional)(f)
return decorator
delete(self, rule, **options)
¶
Shortcut for app.route(methods=['DELETE']).
Source code in apiflask/scaffold.py
def delete(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['DELETE'])`."""
return self._method_route('DELETE', rule, options)
doc(self, summary=None, description=None, tag=None, tags=None, responses=None, deprecated=None, hide=None, operation_id=None, security=None)
¶
Set up the OpenAPI Spec for view functions.
Be sure to put it under the routes decorators (i.e.,
app.route,app.get,app.post, etc.).
Examples:
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.doc(summary='Say hello', tags=['Foo'])
def hello():
return 'Hello'
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
summary |
Optional[str] |
The summary of this endpoint. If not set, the name of the view function
will be used. If your view function is named with |
None |
description |
Optional[str] |
The description of this endpoint. If not set, the lines after the empty line of the docstring will be used. |
None |
tag |
Optional[str] |
Deprecated since 1.0, use |
None |
tags |
Optional[List[str]] |
A list of tag names of this endpoint, map the tags you passed in the |
None |
responses |
Union[List[int], Dict[int, str]] |
The other responses for this view function, accepts a dict in a format
of |
None |
deprecated |
Optional[bool] |
Flag this endpoint as deprecated in API docs. |
None |
hide |
Optional[bool] |
Hide this endpoint in API docs. |
None |
operation_id |
Optional[str] |
The |
None |
security |
Union[str, List[Union[str, Dict[str, list]]]] |
The |
None |
Version changed: 1.0
- Add
securityparameter to support customizing security info. - The
roleparameter is deprecated.
Version changed: 0.12.0
- Move to
APIFlaskandAPIBlueprintclasses.
Version changed: 0.10.0
- Add parameter
operation_id.
Version changed: 0.5.0
- Change the default value of parameters
hideanddeprecatedfromFalsetoNone.
Version changed: 0.4.0
- Add parameter
tag.
Version changed: 0.3.0
- Change the default value of
deprecatedfromNonetoFalse. - Rename parameter
tagstotag.
Version added: 0.2.0
Source code in apiflask/scaffold.py
def doc(
self,
summary: t.Optional[str] = None,
description: t.Optional[str] = None,
tag: t.Optional[str] = None,
tags: t.Optional[t.List[str]] = None,
responses: t.Optional[t.Union[t.List[int], t.Dict[int, str]]] = None,
deprecated: t.Optional[bool] = None,
hide: t.Optional[bool] = None,
operation_id: t.Optional[str] = None,
security: t.Optional[t.Union[str, t.List[t.Union[str, t.Dict[str, list]]]]] = None,
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Set up the OpenAPI Spec for view functions.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
Examples:
```python
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.doc(summary='Say hello', tags=['Foo'])
def hello():
return 'Hello'
```
Arguments:
summary: The summary of this endpoint. If not set, the name of the view function
will be used. If your view function is named with `get_pet`, then the summary
will be "Get Pet". If the view function has a docstring, then the first
line of the docstring will be used. The precedence will be:
```
@app.doc(summary='blah') > the first line of docstring > the view function name
```
description: The description of this endpoint. If not set, the lines after the empty
line of the docstring will be used.
tag: Deprecated since 1.0, use `tags` instead.
tags: A list of tag names of this endpoint, map the tags you passed in the `app.tags`
attribute. If `app.tags` is not set, the blueprint name will be used as tag name.
responses: The other responses for this view function, accepts a dict in a format
of `{404: 'Not Found'}` or a list of status code (`[404, 418]`). If pass a dict,
and a response with the same status code is already exist, the existing
description will be overwritten.
deprecated: Flag this endpoint as deprecated in API docs.
hide: Hide this endpoint in API docs.
operation_id: The `operationId` of this endpoint. Set config `AUTO_OPERATION_ID` to
`True` to enable the auto-generating of operationId (in the format of
`{method}_{endpoint}`).
security: The `security` used for this endpoint. Match the security info specified in
the `SECURITY_SCHEMES` configuration. If you don't need specify the scopes, just
pass a security name (equals to `[{'foo': []}]`) or a list of security names (equals
to `[{'foo': []}, {'bar': []}]`).
*Version changed: 1.0*
- Add `security` parameter to support customizing security info.
- The `role` parameter is deprecated.
*Version changed: 0.12.0*
- Move to `APIFlask` and `APIBlueprint` classes.
*Version changed: 0.10.0*
- Add parameter `operation_id`.
*Version changed: 0.5.0*
- Change the default value of parameters `hide` and `deprecated` from `False` to `None`.
*Version changed: 0.4.0*
- Add parameter `tag`.
*Version changed: 0.3.0*
- Change the default value of `deprecated` from `None` to `False`.
- Rename parameter `tags` to `tag`.
*Version added: 0.2.0*
"""
_tags = None
if tag is not None:
warnings.warn(
'The `tag` parameter is deprecated and will be removed in 1.1, '
'use `tags` and always pass a list instead.',
DeprecationWarning,
stacklevel=2,
)
_tags = [tag]
elif tags is not None:
_tags = tags
def decorator(f):
f = _ensure_sync(f)
_annotate(
f,
summary=summary,
description=description,
tags=_tags,
responses=responses,
deprecated=deprecated,
hide=hide,
operation_id=operation_id,
security=security,
)
return f
return decorator
get(self, rule, **options)
¶
Shortcut for app.route() or app.route(methods=['GET']).
Source code in apiflask/scaffold.py
def get(self, rule: str, **options: t.Any):
"""Shortcut for `app.route()` or `app.route(methods=['GET'])`."""
return self._method_route('GET', rule, options)
input(self, schema, location='json', schema_name=None, example=None, examples=None, **kwargs)
¶
Add input settings for view functions.
Be sure to put it under the routes decorators (i.e.,
app.route,app.get,app.post, etc.).
If the validation passed, the data will inject into view
function as a positional argument in the form of dict. Otherwise,
an error response with the detail of the validation result will be returned.
Examples:
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.input(PetIn)
def hello(parsed_and_validated_input_data):
print(parsed_and_validated_input_data)
return 'Hello'!
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
schema |
Union[Schema, Type[Schema], Dict[str, Union[Field, type]]] |
The marshmallow schema of the input data. |
required |
location |
str |
The location of the input data, one of |
'json' |
schema_name |
Optional[str] |
The schema name for dict schema, only needed when you pass
a schema dict (e.g., |
None |
example |
Optional[Any] |
The example data in dict for request body, you should use either
|
None |
examples |
Optional[Dict[str, Any]] |
Multiple examples for request body, you should pass a dict that contains multiple examples. Example: |
None |
Version changed: 1.0
- Ensure only one input body location was used.
- Add
form_and_filesandjson_or_form(from webargs) location. - Rewrite
filesto act asform_and_files. - Use correct request content type for
formandfiles.
Version changed: 0.12.0
- Move to APIFlask and APIBlueprint classes.
Version changed: 0.4.0
- Add parameter
examples.
Source code in apiflask/scaffold.py
def input(
self,
schema: SchemaType,
location: str = 'json',
schema_name: t.Optional[str] = None,
example: t.Optional[t.Any] = None,
examples: t.Optional[t.Dict[str, t.Any]] = None,
**kwargs: t.Any
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Add input settings for view functions.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
If the validation passed, the data will inject into view
function as a positional argument in the form of `dict`. Otherwise,
an error response with the detail of the validation result will be returned.
Examples:
```python
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.input(PetIn)
def hello(parsed_and_validated_input_data):
print(parsed_and_validated_input_data)
return 'Hello'!
```
Arguments:
schema: The marshmallow schema of the input data.
location: The location of the input data, one of `'json'` (default),
`'files'`, `'form'`, `'cookies'`, `'headers'`, `'query'`
(same as `'querystring'`).
schema_name: The schema name for dict schema, only needed when you pass
a schema dict (e.g., `{'name': String(required=True)}`) for `json`
location.
example: The example data in dict for request body, you should use either
`example` or `examples`, not both.
examples: Multiple examples for request body, you should pass a dict
that contains multiple examples. Example:
```python
{
'example foo': { # example name
'summary': 'an example of foo', # summary field is optional
'value': {'name': 'foo', 'id': 1} # example value
},
'example bar': {
'summary': 'an example of bar',
'value': {'name': 'bar', 'id': 2}
},
}
```
*Version changed: 1.0*
- Ensure only one input body location was used.
- Add `form_and_files` and `json_or_form` (from webargs) location.
- Rewrite `files` to act as `form_and_files`.
- Use correct request content type for `form` and `files`.
*Version changed: 0.12.0*
- Move to APIFlask and APIBlueprint classes.
*Version changed: 0.4.0*
- Add parameter `examples`.
"""
if isinstance(schema, ABCMapping):
schema = _generate_schema_from_mapping(schema, schema_name)
if isinstance(schema, type): # pragma: no cover
schema = schema()
def decorator(f):
f = _ensure_sync(f)
is_body_location = location in BODY_LOCATIONS
if is_body_location and hasattr(f, '_spec') and 'body' in f._spec:
raise RuntimeError(
'When using the app.input() decorator, you can only declare one request '
'body location (one of "json", "form", "files", "form_and_files", '
'and "json_or_form").'
)
if location == 'json':
_annotate(f, body=schema, body_example=example, body_examples=examples)
elif location == 'form':
_annotate(
f,
body=schema,
body_example=example,
body_examples=examples,
content_type='application/x-www-form-urlencoded'
)
elif location in ['files', 'form_and_files']:
_annotate(
f,
body=schema,
body_example=example,
body_examples=examples,
content_type='multipart/form-data'
)
else:
if not hasattr(f, '_spec') or f._spec.get('args') is None:
_annotate(f, args=[])
if location == 'path':
_annotate(f, omit_default_path_parameters=True)
# TODO: Support set example for request parameters
f._spec['args'].append((schema, location))
return use_args(schema, location=location, **kwargs)(f)
return decorator
output(self, schema, status_code=200, description=None, schema_name=None, example=None, examples=None, links=None)
¶
Add output settings for view functions.
Be sure to put it under the routes decorators (i.e.,
app.route,app.get,app.post, etc.).
The decorator will format the return value of your view function with provided marshmallow schema. You can return a dict or an object (such as a model class instance of ORMs). APIFlask will handle the formatting and turn your return value into a JSON response.
P.S. The output data will not be validated; it's a design choice of marshmallow. marshmallow 4.0 may be support the output validation.
Examples:
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.output(PetOut)
def hello():
return the_dict_or_object_match_petout_schema
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
schema |
Union[Schema, Type[Schema], Dict[str, Union[Field, type]]] |
The schemas of the output data. |
required |
status_code |
int |
The status code of the response, defaults to |
200 |
description |
Optional[str] |
The description of the response. |
None |
schema_name |
Optional[str] |
The schema name for dict schema, only needed when you pass
a schema dict (e.g., |
None |
example |
Optional[Any] |
The example data in dict for response body, you should use either
|
None |
examples |
Optional[Dict[str, Any]] |
Multiple examples for response body, you should pass a dict that contains multiple examples. Example: |
None |
links |
Optional[Dict[str, Any]] |
The See the docs for more details about setting response links. |
None |
Version changed: 0.12.0
- Move to APIFlask and APIBlueprint classes.
Version changed: 0.10.0
- Add
linksparameter.
Version changed: 0.9.0
- Add base response customization support.
Version changed: 0.6.0
- Support decorating async views.
Version changed: 0.5.2
- Return the
Responseobject directly.
Version changed: 0.4.0
- Add parameter
examples.
Source code in apiflask/scaffold.py
def output(
self,
schema: SchemaType,
status_code: int = 200,
description: t.Optional[str] = None,
schema_name: t.Optional[str] = None,
example: t.Optional[t.Any] = None,
examples: t.Optional[t.Dict[str, t.Any]] = None,
links: t.Optional[t.Dict[str, t.Any]] = None,
) -> t.Callable[[DecoratedType], DecoratedType]:
"""Add output settings for view functions.
> Be sure to put it under the routes decorators (i.e., `app.route`, `app.get`,
`app.post`, etc.).
The decorator will format the return value of your view function with
provided marshmallow schema. You can return a dict or an object (such
as a model class instance of ORMs). APIFlask will handle the formatting
and turn your return value into a JSON response.
P.S. The output data will not be validated; it's a design choice of marshmallow.
marshmallow 4.0 may be support the output validation.
Examples:
```python
from apiflask import APIFlask
app = APIFlask(__name__)
@app.get('/')
@app.output(PetOut)
def hello():
return the_dict_or_object_match_petout_schema
```
Arguments:
schema: The schemas of the output data.
status_code: The status code of the response, defaults to `200`.
description: The description of the response.
schema_name: The schema name for dict schema, only needed when you pass
a schema dict (e.g., `{'name': String()}`).
example: The example data in dict for response body, you should use either
`example` or `examples`, not both.
examples: Multiple examples for response body, you should pass a dict
that contains multiple examples. Example:
```python
{
'example foo': { # example name
'summary': 'an example of foo', # summary field is optional
'value': {'name': 'foo', 'id': 1} # example value
},
'example bar': {
'summary': 'an example of bar',
'value': {'name': 'bar', 'id': 2}
},
}
```
links: The `links` of response. It accepts a dict which maps a link name to
a link object. Example:
```python
{
'getAddressByUserId': {
'operationId': 'getUserAddress',
'parameters': {
'userId': '$request.path.id'
}
}
}
```
See the [docs](https://apiflask.com/openapi/#response-links) for more details
about setting response links.
*Version changed: 0.12.0*
- Move to APIFlask and APIBlueprint classes.
*Version changed: 0.10.0*
- Add `links` parameter.
*Version changed: 0.9.0*
- Add base response customization support.
*Version changed: 0.6.0*
- Support decorating async views.
*Version changed: 0.5.2*
- Return the `Response` object directly.
*Version changed: 0.4.0*
- Add parameter `examples`.
"""
if schema == {}:
schema = EmptySchema
if isinstance(schema, ABCMapping):
schema = _generate_schema_from_mapping(schema, schema_name)
if isinstance(schema, type): # pragma: no cover
schema = schema()
if isinstance(schema, EmptySchema):
status_code = 204
def decorator(f):
f = _ensure_sync(f)
_annotate(f, response={
'schema': schema,
'status_code': status_code,
'description': description,
'example': example,
'examples': examples,
'links': links,
})
def _jsonify(
obj: t.Any,
many: bool = _sentinel, # type: ignore
*args: t.Any,
**kwargs: t.Any
) -> Response: # pragma: no cover
"""From Flask-Marshmallow, see the NOTICE file for license information."""
if many is _sentinel:
many = schema.many # type: ignore
base_schema: OpenAPISchemaType = current_app.config['BASE_RESPONSE_SCHEMA']
if base_schema is not None and status_code != 204:
data_key: str = current_app.config['BASE_RESPONSE_DATA_KEY']
if data_key not in obj:
raise RuntimeError(
f'The data key {data_key!r} is not found in the returned dict.'
)
obj[data_key] = schema.dump(obj[data_key], many=many) # type: ignore
data = base_schema().dump(obj) # type: ignore
else:
data = schema.dump(obj, many=many) # type: ignore
return jsonify(data, *args, **kwargs)
@wraps(f)
def _response(*args: t.Any, **kwargs: t.Any) -> ResponseReturnValueType:
rv = f(*args, **kwargs)
if isinstance(rv, Response):
return rv
if not isinstance(rv, tuple):
return _jsonify(rv), status_code
json = _jsonify(rv[0])
if len(rv) == 2:
rv = (json, rv[1]) if isinstance(rv[1], int) else (json, status_code, rv[1])
elif len(rv) >= 3:
rv = (json, rv[1], rv[2])
else:
rv = (json, status_code)
return rv # type: ignore
return _response
return decorator
patch(self, rule, **options)
¶
Shortcut for app.route(methods=['PATCH']).
Source code in apiflask/scaffold.py
def patch(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['PATCH'])`."""
return self._method_route('PATCH', rule, options)
post(self, rule, **options)
¶
Shortcut for app.route(methods=['POST']).
Source code in apiflask/scaffold.py
def post(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['POST'])`."""
return self._method_route('POST', rule, options)
put(self, rule, **options)
¶
Shortcut for app.route(methods=['PUT']).
Source code in apiflask/scaffold.py
def put(self, rule: str, **options: t.Any):
"""Shortcut for `app.route(methods=['PUT'])`."""
return self._method_route('PUT', rule, options)