デフォルトでは、 **FastAPI** は `JSONResponse` を使ってレスポンスを返します。その `JSONResponse` の中には、 *path operation* が返した内容が入ります。

それは、デフォルトのステータスコードか、 *path operation* でセットしたものを利用します。

## 追加のステータスコード

メインのステータスコードとは別に、他のステータスコードを返したい場合は、`Response` (`JSONResponse` など) に追加のステータスコードを設定して直接返します。

例えば、itemを更新し、成功した場合は200 "OK"のHTTPステータスコードを返す *path operation* を作りたいとします。

しかし、新しいitemも許可したいです。itemが存在しない場合は、それらを作成して201 "Created"を返します。

 *   <li>Processing responses</li>
 *   <li>Handling exceptions during crawling and child URL processing</li>
 *   <li>Handling cases where no URL is in the queue</li>
 *   <li>Handling cases where no response processor or rule is found</li>
 *   <li>Handling system errors</li>
 * </ul>
 *
 * <p>
 * Each logging method checks the log level before logging the message.

  }

  private fun executeSynchronously(request: Request): RecordedResponse {
    val call = client.newCall(request)
    return try {
      val response = call.execute()
      val bodyString = response.body.string()
      RecordedResponse(request, response, null, bodyString, null)
    } catch (e: IOException) {
      RecordedResponse(request, null, null, null, e)
    }
  }

  ): RecordedRequest? = delegate.takeRequest(timeout, unit)?.unwrap()

  @JvmName("-deprecated_requestCount")
  fun getRequestCount(): Int = delegate.requestCount

  fun enqueue(response: MockResponse) {
    delegate.enqueue(response.wrap())
  }

  @Throws(IOException::class)
  @JvmOverloads
  fun start(port: Int = 0) {
    started = true
    delegate.start(port)
  }

  @Throws(IOException::class)

def test_raises_pydantic_v1_model_in_response_model() -> None:
    class ResponseModelV1(BaseModel):
        name: str

    app = FastAPI()

    with pytest.raises(PydanticV1NotSupportedError):

        @app.get("/response-model", response_model=ResponseModelV1)
        def endpoint():  # pragma: no cover
            return {"name": "test"}


def test_raises_pydantic_v1_model_in_additional_responses_model() -> None:

    Note over Server: El servidor interpreta los headers<br/>(si --forwarded-allow-ips está configurado)

    Server->>Proxy: HTTP Response<br/>con URLs HTTPS correctas

    Proxy->>Client: HTTPS Response
```

El **proxy** intercepta el request original del cliente y añade los *headers* especiales de reenvío (`X-Forwarded-*`) antes de pasar el request al **application server**.

after a failed authentication, they used the HTTP status code `403 Forbidden`.

Starting with FastAPI version `0.122.0`, they use the more appropriate HTTP status code `401 Unauthorized`, and return a sensible `WWW-Authenticate` header in the response, following the HTTP specifications, <a href="https://datatracker.ietf.org/doc/html/rfc7235#section-3.1" class="external-link" target="_blank">RFC 7235</a>, <a href="https://datatracker.ietf.org/doc/html/rfc9110#name-401-unauthorized" class="external-link"...

falha na autenticação, eles usavam o código de status HTTP `403 Forbidden`.

A partir da versão `0.122.0` do FastAPI, eles usam o código de status HTTP `401 Unauthorized`, mais apropriado, e retornam um cabeçalho `WWW-Authenticate` adequado na response, seguindo as especificações HTTP, <a href="https://datatracker.ietf.org/doc/html/rfc7235#section-3.1" class="external-link" target="_blank">RFC 7235</a>, <a href="https://datatracker.ietf.org/doc/html/rfc9110#name-401-unauthorized" class="external-link"...

     */
    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        final HttpServletRequest req = (HttpServletRequest) request;
        final HttpServletResponse resp = (HttpServletResponse) response;
        NtlmPasswordAuthentication ntlm = negotiate(req, resp, false);

        if (ntlm == null) {

 *
 * @param <IDTYPE> the type of the identifier for the access result
 */
public interface AccessResult<IDTYPE> {

    /**
     * Initializes the access result with the given response and result data.
     *
     * @param responseData the response data
     * @param resultData the result data
     */
    void init(ResponseData responseData, ResultData resultData);

    /**
     * Returns the identifier of the access result.