get_request_handler

Creates and returns an asynchronous request handler function that manages the lifecycle of a FastAPI endpoint, including dependency resolution, request body parsing, and response serialization. It handles various response types such as standard JSON, Server-Sent Events (SSE), and streaming JSONL while ensuring proper cleanup of resources via an internal exit stack.

def get_request_handler(
    dependant: Dependant,
    body_field: ModelField | None,
    status_code: int | None,
    response_class: type[Response] | DefaultPlaceholder,
    response_field: ModelField | None,
    response_model_include: IncEx | None,
    response_model_exclude: IncEx | None,
    response_model_by_alias: bool,
    response_model_exclude_unset: bool,
    response_model_exclude_defaults: bool,
    response_model_exclude_none: bool,
    dependency_overrides_provider: Any | None,
    embed_body_fields: bool,
    strict_content_type: bool | DefaultPlaceholder,
    stream_item_field: ModelField | None,
    is_json_stream: bool
) - > Callable[[Request], Coroutine[Any, Any, Response]]

Builds and returns an asynchronous request handler function that manages the full lifecycle of an HTTP request, including dependency injection, body parsing, and response serialization. It handles various response types such as standard JSON, Server-Sent Events (SSE), and JSONL streaming while ensuring proper cleanup of resources via an exit stack.

Parameters

Name	Type	Description
dependant	Dependant	The dependency graph and metadata for the endpoint, including the actual function to call and its requirements.
body_field	`ModelField	None`
status_code	`int	None`
response_class	`type[Response]	DefaultPlaceholder`
response_field	`ModelField	None`
response_model_include	`IncEx	None`
response_model_exclude	`IncEx	None`
response_model_by_alias	bool	Whether to use the field's alias name for serialization.
response_model_exclude_unset	bool	Whether to exclude fields that were not explicitly set in the model.
response_model_exclude_defaults	bool	Whether to exclude fields that have their default values.
response_model_exclude_none	bool	Whether to exclude fields that have a value of None.
dependency_overrides_provider	`Any	None`
embed_body_fields	bool	Whether to embed single body fields in a JSON object instead of treating them as the root.
strict_content_type	`bool	DefaultPlaceholder`
stream_item_field	`ModelField	None`
is_json_stream	bool	Whether the response should be streamed as newline-delimited JSON (JSONL).

Returns

Type	Description
Callable[[Request], Coroutine[Any, Any, Response]]	An asynchronous function that accepts a Request and returns a Response, suitable for use as a FastAPI route handler.