.build(),
      )
    var response = call.execute()
    assertThat(response.code).isEqualTo(200)
    assertThat(response.body.string()).isEqualTo("abc")
    response.close()
    listener.clearAllEvents()
    call = call.clone()
    response = call.execute()
    assertThat(response.code).isEqualTo(200)
    assertThat(response.body.string()).isEqualTo("abc")
    response.close()

    server.enqueue(MockResponse(body = "b"))
    val request = Request(server.url("/"))
    val response1 = client.newCall(request).execute()
    val response2 = client.newCall(request).execute()
    response1.body.string() // Discard the response body.
    response2.body.string() // Discard the response body.
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)

## Rewriting Responses

If transparent compression was used, OkHttp will drop the corresponding response headers `Content-Encoding` and `Content-Length` because they don’t apply to the decompressed response body.

If a conditional GET was successful, responses from the network and cache are merged as directed by the spec.

## Follow-up Requests

## Zusätzliche Response mit `model`

Sie können Ihren *Pfadoperation-Dekoratoren* einen Parameter `responses` übergeben.

Der nimmt ein `dict` entgegen, die Schlüssel sind Statuscodes für jede Response, wie etwa `200`, und die Werte sind andere `dict`s mit den Informationen für jede Response.

You can declare a `response_model`, using the default status code `200` (or a custom one if you need), and then declare additional information for that same response in `responses`, directly in the OpenAPI schema.

**FastAPI** will keep the additional information from `responses`, and combine it with the JSON Schema from your model.

    /** Don't accept an unvalidated cached response. */
    fun noCache() = commonNoCache()

    /** Don't store the server's response in any cache. */
    fun noStore() = commonNoStore()

    /**
     * Only accept the response if it is in the cache. If the response isn't cached, a `504
     * Unsatisfiable Request` response will be returned.
     */
    fun onlyIfCached() = commonOnlyIfCached()

        request.url(), chain.connection(), request.headers()));

    Response response = chain.proceed(request);

    long t2 = System.nanoTime();
    logger.info(String.format("Received response for %s in %.1fms%n%s",
        response.request().url(), (t2 - t1) / 1e6d, response.headers()));

    return response;
  }
}
```

    cacheRequest: CacheRequest?,
    response: Response,
  ): Response {
    // Some apps return a null body; for compatibility we treat that like a null cache request.
    if (cacheRequest == null) return response
    val cacheBodyUnbuffered = cacheRequest.body()

    val source = response.body.source()
    val cacheBody = cacheBodyUnbuffered.buffer()

    val cacheWritingSource =
      object : Source {

        ) {
          exceptionRef.set(e)
          latch.countDown()
        }

        @Throws(IOException::class)
        override fun onResponse(
          call: Call,
          response: Response,
        ) {
          response.close()
          latch.countDown()
        }
      },
    )
    latch.await()
    assertThat(call.isCanceled()).isTrue()

## 组合信息
您还可以联合接收来自多个位置的响应信息，包括 `response_model `、 `status_code` 和 `responses `参数。

您可以使用默认的状态码 `200` （或者您需要的自定义状态码）声明一个 `response_model `，然后直接在OpenAPI模式中在 `responses` 中声明相同响应的其他信息。

**FastAPI**将保留来自 `responses` 的附加信息，并将其与模型中的JSON Schema结合起来。

例如，您可以使用状态码 `404` 声明响应，该响应使用`Pydantic`模型并具有自定义的` description` 。

以及一个状态码为 `200` 的响应，它使用您的 `response_model` ，但包含自定义的 `example` ：

```Python hl_lines="20-31"