Es enthält `tags`, `parameters`, `requestBody`, `responses`, usw.

Dieses *Pfadoperation*-spezifische OpenAPI-Schema wird normalerweise automatisch von **FastAPI** generiert, Sie können es aber auch erweitern.

/// tip | "Tipp"

Dies ist ein Low-Level Erweiterungspunkt.

Wenn Sie nur zusätzliche Responses deklarieren müssen, können Sie dies bequemer mit [Zusätzliche Responses in OpenAPI](additional-responses.md){.internal-link target=_blank} tun.

///

```

/// note | "Technical Details"

You could also use `from starlette.requests import Request` and `from starlette.responses import JSONResponse`.

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette. The same with `Request`.

///

## Override the default exception handlers

    client = TestClient(app)
    response = client.get("/")
    assert response.status_code == 200, response.text
    assert b"<form" in response.content


@needs_py39
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},

    route: Route?,
    response: Response,
  ): Request? {
    if (route == null) throw NullPointerException("route == null")
    responses += response
    routes += route
    if (!schemeMatches(response) || credential == null) return null
    val header =
      when (response.code) {
        407 -> "Proxy-Authorization"
        else -> "Authorization"
      }
    return response.request.newBuilder()

def test_get_item():
    response = client.get("/items/foo")
    assert response.status_code == 200, response.text
    assert response.json() == {"item": "The Foo Wrestlers"}


def test_get_item_not_found():
    response = client.get("/items/bar")
    assert response.status_code == 404, response.text
    assert response.headers.get("x-error") == "Some custom header"
    assert response.json() == {"detail": "Item not found"}

```

/// warning | "注意"

上記の例のように `Response` を明示的に返す場合、それは直接返されます。

モデルなどはシリアライズされません。

必要なデータが含まれていることや、値が有効なJSONであること (`JSONResponse` を使う場合) を確認してください。

///

/// note | "技術詳細"

`from starlette.responses import JSONResponse` を利用することもできます。

**FastAPI** は `fastapi.responses` と同じ `starlette.responses` を、開発者の利便性のために提供しています。しかし有効なレスポンスはほとんどStarletteから来ています。 `status` についても同じです。

///

def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/a/": {
                "get": {
                    "responses": {
                        "200": {

import (
	"context"
	"errors"
)

// A Stream is a two-way stream.
// All responses *must* be read by the caller.
// If the call is canceled through the context,
// the appropriate error will be returned.
type Stream struct {
	// responses from the remote server.
	// Channel will be closed after error or when remote closes.
	// All responses *must* be read by the caller until either an error is returned or the channel is closed.

def test_generic_parameterless_depends():
    response = client.get("/a")
    assert response.status_code == 200, response.text
    assert response.json() == {"cls": "A"}

    response = client.get("/b")
    assert response.status_code == 200, response.text
    assert response.json() == {"cls": "B"}


def test_openapi_schema():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text

from typing import Union

from fastapi import FastAPI
from fastapi.responses import FileResponse
from pydantic import BaseModel


class Item(BaseModel):
    id: str
    value: str


responses = {
    404: {"description": "Item not found"},
    302: {"description": "The item was moved"},
    403: {"description": "Not enough privileges"},
}


app = FastAPI()


@app.get(
    "/items/{item_id}",