"city": "Anytown",
            "state_province": "CA",
        },
    }


def test_openapi_schema(client: TestClient):
    """
    Sanity check to ensure our app's openapi schema renders as we expect
    """
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == snapshot(
        {
            "components": {

					Method:   r.Method,
					RawQuery: redactLDAPPwd(r.URL.RawQuery),
					Client:   handlers.GetSourceIP(r),
					Headers:  reqHeaders,
					Path:     reqPath,
					Body:     reqRecorder.Data(),
				},
				RespInfo: madmin.TraceResponseInfo{
					Time:       reqEndTime,
					Headers:    respRecorder.Header().Clone(),
					StatusCode: respRecorder.StatusCode,
					Body:       respRecorder.Body(),
				},

class ParameterInType(Enum):
    query = "query"
    header = "header"
    path = "path"
    cookie = "cookie"


class Encoding(BaseModelWithConfig):
    contentType: Optional[str] = None
    headers: Optional[dict[str, Union["Header", Reference]]] = None
    style: Optional[str] = None
    explode: Optional[bool] = None
    allowReserved: Optional[bool] = None


class MediaType(BaseModelWithConfig):

// https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html
// Returns ErrInvalidChecksum if a problem with the checksum is found.
func (r *Reader) AddChecksumNoTrailer(headers http.Header, ignoreValue bool) error {
	cs, err := GetContentChecksum(headers)
	if err != nil {
		return ErrInvalidChecksum
	}
	if cs == nil {
		return nil
	}
	r.contentHash = *cs
	return r.AddNonTrailingChecksum(cs, ignoreValue)
}

		// not a storage error.
		return nil
	}
	readers := make([]*metacacheReader, len(disks))
	defer func() {
		for _, r := range readers {
			r.Close()
		}
	}()
	for i := range disks {
		r, w := io.Pipe()
		// Make sure we close the pipe so blocked writes doesn't stay around.
		defer r.CloseWithError(context.Canceled)

		readers[i] = newMetacacheReader(r)
		d := disks[i]

@app.middleware("http")
async def add_process_time_header(request: Request, call_next):
    start_time = time.perf_counter()
    response = await call_next(request)
    process_time = time.perf_counter() - start_time
    response.headers["X-Process-Time"] = str(process_time)

    ]
}
```

## Summary { #summary }

You can use **Pydantic models** to declare **query parameters** in **FastAPI**. 😎

/// tip

Spoiler alert: you can also use Pydantic models to declare cookies and headers, but you will read about that later in the tutorial. 🤫

```python
from fastapi import UploadFile
```

::: fastapi.UploadFile
    options:
        members:
            - file
            - filename
            - size
            - headers
            - content_type
            - read
            - write
            - seek

  }

  @Test
  fun worksIfTrailersSet() {
    val response =
      newResponse("".toResponseBody()) {
        trailers(
          object : TrailersSource {
            override fun get() = Headers.headersOf("a", "b")
          },
        )
      }

    assertThat(response.trailers()["a"]).isEqualTo("b")
  }

  @Test fun peekAfterReadingResponse() {
    val response = newResponse(responseBody("abc"))

    assertThat(cacheControl.onlyIfCached).isTrue()
    assertThat(cacheControl.noTransform).isTrue()
    assertThat(cacheControl.immutable).isTrue()

    // These members are accessible to response headers only.
    assertThat(cacheControl.sMaxAgeSeconds).isEqualTo(-1)
    assertThat(cacheControl.isPrivate).isFalse()
    assertThat(cacheControl.isPublic).isFalse()
    assertThat(cacheControl.mustRevalidate).isFalse()
  }