Diese gibt lediglich eine JSON-<abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Response</abbr> zurück, mit dem Ergebnis der Methode `.openapi()` der Anwendung.

    // Packet Types (ptype)
    /**
     * Request packet type
     */
    int RPC_PT_REQUEST = 0x00;
    /**
     * Ping packet type
     */
    int RPC_PT_PING = 0x01;
    /**
     * Response packet type
     */
    int RPC_PT_RESPONSE = 0x02;
    /**
     * Fault packet type - indicates an error
     */
    int RPC_PT_FAULT = 0x03;
    /**
     * Bind packet type - establishes context
     */

		response.DecryptionErr = "The generated and the decrypted data key do not match"
		resp, err := json.Marshal(response)
		if err != nil {
			writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInternalError), err.Error(), r.URL)
			return
		}
		writeSuccessResponseJSON(w, resp)
		return
	}

	resp, err := json.Marshal(response)
	if err != nil {

Neste exemplo, quando o cliente pede, na requisição, por um item cujo ID não existe, a exceção com o status code `404` é lançada:

{* ../../docs_src/handling_errors/tutorial001_py310.py hl[11] *}

### A response resultante { #the-resulting-response }

Se o cliente faz uma requisição para `http://example.com/items/foo` (um `item_id` `"foo"`), esse cliente receberá um HTTP status code 200, e uma resposta JSON:


```JSON
{

import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.DERTaggedObject;

/**
 * SPNEGO response token (NegTokenTarg) used in SPNEGO authentication exchanges
 */
public class NegTokenTarg extends SpnegoToken {

    /**
     * Result code indicating unspecified result
     */

## JSON Lines { #json-lines }

En estos casos, es común enviar "**JSON Lines**", que es un formato donde envías un objeto JSON por línea.

Una response tendría un tipo de contenido `application/jsonl` (en lugar de `application/json`) y el response body sería algo como:

```json
{"name": "Plumbus", "description": "A multi-purpose household device."}
{"name": "Portal Gun", "description": "A portal opening device."}

from fastapi import Depends, FastAPI

app = FastAPI()


def get_username():
    try:
        yield "Rick"
    finally:
        print("Cleanup up before response is sent")


@app.get("/users/me")
def get_user_me(username: str = Depends(get_username, scope="function")):

 * ⬜️ [Okio](https://github.com/square/okio/): A modern I/O API for Java.
 * [OkLog](https://github.com/simonpercic/OkLog): Response logging interceptor for OkHttp. Logs a URL link with URL-encoded response for every OkHttp call.
 * [Okurl](https://github.com/yschimke/okurl/wiki) A curl-like client for social networks and other APIs.

///

/// tip | Tipp

Durch die Deklaration von `response_class=HTMLResponse` kann die Dokumentationsoberfläche erkennen, dass die <abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Response</abbr> HTML sein wird.

///

/// note | Technische Details

Sie können auch `from starlette.templating import Jinja2Templates` verwenden.

        handler -->> client: HTTP error response
    end
    dep ->> operation: Run dependency, e.g. DB session
    opt raise
        operation -->> dep: Raise Exception (e.g. HTTPException)
        opt handle
            dep -->> dep: Can catch exception, raise a new HTTPException, raise other exception
        end
        handler -->> client: HTTP error response
    end