async def solve_dependencies(
*,
request: Request,
dependant: Dependant,
body: Dict[str, Any] = None,
background_tasks: BackgroundTasks = None,
) -> Tuple[Dict[str, Any], List[ErrorWrapper], Optional[BackgroundTasks]]:
values: Dict[str, Any] = {}
errors: List[ErrorWrapper] = []
for sub_dependant in dependant.dependencies:
sub_values, sub_errors, background_tasks = await solve_dependencies(
request=request,
dependant=sub_dependant,
body=body,
background_tasks=background_tasks,
)
if sub_errors:
errors.extend(sub_errors)
continue
assert sub_dependant.call is not None, "sub_dependant.call must be a function"
if is_coroutine_callable(sub_dependant.call):
solved = await sub_dependant.call(**sub_values)
else:
solved = await run_in_threadpool(sub_dependant.call, **sub_values)
assert sub_dependant.name is not None, "Subdependants always have a name"
values[sub_dependant.name] = solved
path_values, path_errors = request_params_to_args(
dependant.path_params, request.path_params
)
query_values, query_errors = request_params_to_args(
dependant.query_params, request.query_params
)
header_values, header_errors = request_params_to_args(
dependant.header_params, request.headers
)
cookie_values, cookie_errors = request_params_to_args(
dependant.cookie_params, request.cookies
)
values.update(path_values)
values.update(query_values)
values.update(header_values)
values.update(cookie_values)
errors += path_errors + query_errors + header_errors + cookie_errors
if dependant.body_params:
body_values, body_errors = await request_body_to_args( # type: ignore # body_params checked above
dependant.body_params, body
)
values.update(body_values)
errors.extend(body_errors)
if dependant.request_param_name:
values[dependant.request_param_name] = request
if dependant.background_tasks_param_name:
if background_tasks is None:
background_tasks = BackgroundTasks()
values[dependant.background_tasks_param_name] = background_tasks
if dependant.security_scopes_param_name:
values[dependant.security_scopes_param_name] = SecurityScopes(
scopes=dependant.security_scopes
)
return values, errors, background_tasks
async def solve_dependencies(
*,
request: Union[Request, WebSocket],
dependant: Dependant,
body: Optional[Union[Dict[str, Any], FormData]] = None,
background_tasks: Optional[BackgroundTasks] = None,
response: Optional[Response] = None,
dependency_overrides_provider: Optional[Any] = None,
dependency_cache: Optional[Dict[Tuple[Callable[..., Any], Tuple[str]],
Any]] = None,
) -> Tuple[Dict[str, Any], List[ErrorWrapper], Optional[BackgroundTasks],
Response, Dict[Tuple[Callable[..., Any], Tuple[str]], Any], ]:
values: Dict[str, Any] = {}
errors: List[ErrorWrapper] = []
response = response or Response(
content=None,
status_code=None, # type: ignore
headers=None, # type: ignore # in Starlette
media_type=None, # type: ignore # in Starlette
background=None, # type: ignore # in Starlette
)
dependency_cache = dependency_cache or {}
sub_dependant: Dependant
for sub_dependant in dependant.dependencies:
sub_dependant.call = cast(Callable[..., Any], sub_dependant.call)
sub_dependant.cache_key = cast(Tuple[Callable[..., Any], Tuple[str]],
sub_dependant.cache_key)
call = sub_dependant.call
use_sub_dependant = sub_dependant
if (dependency_overrides_provider
and dependency_overrides_provider.dependency_overrides):
original_call = sub_dependant.call
call = getattr(dependency_overrides_provider,
"dependency_overrides",
{}).get(original_call, original_call)
use_path: str = sub_dependant.path # type: ignore
use_sub_dependant = get_dependant(
path=use_path,
call=call,
name=sub_dependant.name,
security_scopes=sub_dependant.security_scopes,
)
use_sub_dependant.security_scopes = sub_dependant.security_scopes
solved_result = await solve_dependencies(
request=request,
dependant=use_sub_dependant,
body=body,
background_tasks=background_tasks,
response=response,
dependency_overrides_provider=dependency_overrides_provider,
dependency_cache=dependency_cache,
)
(
sub_values,
sub_errors,
background_tasks,
_, # the subdependency returns the same response we have
sub_dependency_cache,
) = solved_result
dependency_cache.update(sub_dependency_cache)
if sub_errors:
errors.extend(sub_errors)
continue
if sub_dependant.use_cache and sub_dependant.cache_key in dependency_cache:
solved = dependency_cache[sub_dependant.cache_key]
elif is_gen_callable(call) or is_async_gen_callable(call):
stack = request.scope.get("fastapi_astack")
if stack is None:
raise RuntimeError(async_contextmanager_dependencies_error
) # pragma: no cover
solved = await solve_generator(call=call,
stack=stack,
sub_values=sub_values)
elif is_coroutine_callable(call):
solved = await call(**sub_values)
else:
solved = await run_in_threadpool(call, **sub_values)
if sub_dependant.name is not None:
values[sub_dependant.name] = solved
if sub_dependant.cache_key not in dependency_cache:
dependency_cache[sub_dependant.cache_key] = solved
path_values, path_errors = request_params_to_args(dependant.path_params,
request.path_params)
query_values, query_errors = request_params_to_args(
dependant.query_params, request.query_params)
header_values, header_errors = request_params_to_args(
dependant.header_params, request.headers)
cookie_values, cookie_errors = request_params_to_args(
dependant.cookie_params, request.cookies)
values.update(path_values)
values.update(query_values)
values.update(header_values)
values.update(cookie_values)
errors += path_errors + query_errors + header_errors + cookie_errors
if dependant.body_params:
(
body_values,
body_errors,
) = await request_body_to_args( # body_params checked above
required_params=dependant.body_params,
received_body=body)
values.update(body_values)
errors.extend(body_errors)
if dependant.http_connection_param_name:
values[dependant.http_connection_param_name] = request
if dependant.request_param_name and isinstance(request, Request):
values[dependant.request_param_name] = request
elif dependant.websocket_param_name and isinstance(request, WebSocket):
values[dependant.websocket_param_name] = request
if dependant.background_tasks_param_name:
if background_tasks is None:
background_tasks = BackgroundTasks()
values[dependant.background_tasks_param_name] = background_tasks
if dependant.response_param_name:
values[dependant.response_param_name] = response
if dependant.security_scopes_param_name:
values[dependant.security_scopes_param_name] = SecurityScopes(
scopes=dependant.security_scopes)
return values, errors, background_tasks, response, dependency_cache
async def solve_dependencies(
*,
request: Union[Request, WebSocket],
dependant: Dependant,
body: Optional[Union[Dict[str, Any], FormData]] = None,
background_tasks: BackgroundTasks = None,
response: Response = None,
dependency_overrides_provider: Any = None,
dependency_cache: Dict[Tuple[Callable, Tuple[str]], Any] = None,
) -> Tuple[
Dict[str, Any],
List[ErrorWrapper],
Optional[BackgroundTasks],
Response,
Dict[Tuple[Callable, Tuple[str]], Any],
]:
values: Dict[str, Any] = {}
errors: List[ErrorWrapper] = []
response = response or Response(
content=None,
status_code=None, # type: ignore
headers=None,
media_type=None,
background=None,
)
dependency_cache = dependency_cache or {}
sub_dependant: Dependant
for sub_dependant in dependant.dependencies:
sub_dependant.call = cast(Callable, sub_dependant.call)
sub_dependant.cache_key = cast(
Tuple[Callable, Tuple[str]], sub_dependant.cache_key
)
call = sub_dependant.call
use_sub_dependant = sub_dependant
if (
dependency_overrides_provider
and dependency_overrides_provider.dependency_overrides
):
original_call = sub_dependant.call
call = getattr(
dependency_overrides_provider, "dependency_overrides", {}
).get(original_call, original_call)
use_path: str = sub_dependant.path # type: ignore
use_sub_dependant = get_dependant(
path=use_path,
call=call,
name=sub_dependant.name,
security_scopes=sub_dependant.security_scopes,
)
solved_result = await solve_dependencies(
request=request,
dependant=use_sub_dependant,
body=body,
background_tasks=background_tasks,
response=response,
dependency_overrides_provider=dependency_overrides_provider,
dependency_cache=dependency_cache,
)
sub_values, sub_errors, background_tasks, sub_response, sub_dependency_cache = (
solved_result
)
sub_response = cast(Response, sub_response)
response.headers.raw.extend(sub_response.headers.raw)
if sub_response.status_code:
response.status_code = sub_response.status_code
dependency_cache.update(sub_dependency_cache)
if sub_errors:
errors.extend(sub_errors)
continue
if sub_dependant.use_cache and sub_dependant.cache_key in dependency_cache:
solved = dependency_cache[sub_dependant.cache_key]
elif is_coroutine_callable(call):
solved = await call(**sub_values)
else:
solved = await run_in_threadpool(call, **sub_values)
if sub_dependant.name is not None:
values[sub_dependant.name] = solved
if sub_dependant.cache_key not in dependency_cache:
dependency_cache[sub_dependant.cache_key] = solved
path_values, path_errors = request_params_to_args(
dependant.path_params, request.path_params
)
query_values, query_errors = request_params_to_args(
dependant.query_params, request.query_params
)
header_values, header_errors = request_params_to_args(
dependant.header_params, request.headers
)
cookie_values, cookie_errors = request_params_to_args(
dependant.cookie_params, request.cookies
)
values.update(path_values)
values.update(query_values)
values.update(header_values)
values.update(cookie_values)
errors += path_errors + query_errors + header_errors + cookie_errors
if dependant.body_params:
body_values, body_errors = await request_body_to_args( # body_params checked above
required_params=dependant.body_params, received_body=body
)
values.update(body_values)
errors.extend(body_errors)
if dependant.request_param_name and isinstance(request, Request):
values[dependant.request_param_name] = request
elif dependant.websocket_param_name and isinstance(request, WebSocket):
values[dependant.websocket_param_name] = request
if dependant.background_tasks_param_name:
if background_tasks is None:
background_tasks = BackgroundTasks()
values[dependant.background_tasks_param_name] = background_tasks
if dependant.response_param_name:
values[dependant.response_param_name] = response
if dependant.security_scopes_param_name:
values[dependant.security_scopes_param_name] = SecurityScopes(
scopes=dependant.security_scopes
)
return values, errors, background_tasks, response, dependency_cache
