body = await request.body()
                detail = {"errors": exc.errors(), "body": body.decode()}
                raise HTTPException(status_code=422, detail=detail)

        return custom_route_handler


app = FastAPI()
app.router.route_class = ValidationErrorLoggingRoute


@app.post("/")
async def sum_numbers(numbers: Annotated[list[int], Body()]):

    response = client.post(path)
    assert response.status_code == 422
    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["body", "p"],
                "msg": "Field required",
                "input": None,
            }
        ]
    }


@pytest.mark.parametrize(
    "path",
    [
        "/list-bytes",

        "abc",
      ),
    )
    assertThat(partAbc.body.readUtf8()).isEqualTo("abcd\r\nefgh")

    val partIjk = parts.nextPart()!!
    assertThat(partIjk.headers).isEqualTo(
      headersOf(
        "Content-Type",
        "text/plain; charset=utf-8",
        "Content-ID",
        "ijk",
      ),
    )
    assertThat(partIjk.body.readUtf8()).isEqualTo("ijkl\r\nmnop\r\n")

import com.github.javaparser.ast.body.AnnotationDeclaration
import com.github.javaparser.ast.body.AnnotationMemberDeclaration
import com.github.javaparser.ast.body.BodyDeclaration
import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration
import com.github.javaparser.ast.body.ConstructorDeclaration
import com.github.javaparser.ast.body.EnumConstantDeclaration
import com.github.javaparser.ast.body.EnumDeclaration

from fastapi import APIRouter, Body

router = APIRouter()


@router.post("/compute")
def compute(a: int = Body(), b: str = Body()):

    assert response.json() == {
        "detail": [
            {
                "type": "missing",
                "loc": ["body", "username"],
                "msg": "Field required",
                "input": {},
            },
            {
                "type": "missing",
                "loc": ["body", "password"],
                "msg": "Field required",
                "input": {},
            },
        ]
    }

   * body. This was misleading for tracing because it was too early.
   */
  open fun responseBodyStart(call: Call) {
  }

  /**
   * Invoked immediately after receiving a response body and completing reading it.
   *
   * Will only be invoked for requests having a response body e.g. won't be invoked for a web socket
   * upgrade.
   *

            formatDate(1, TimeUnit.HOURS)!!,
          ),
        body = "ABC.1",
      ),
    )
    server.enqueue(
      MockResponse(
        headers =
          headersOf(
            "Last-Modified",
            formatDate(-1, TimeUnit.HOURS)!!,
            "Expires",
            formatDate(1, TimeUnit.HOURS)!!,
          ),
        body = "ABC.2",
      ),
    )
    client =
      client

* to reach users: донести до пользователей (or `привлечь внимание пользователей` in the promotion context)
* body (meaning HTTP request body): тело запроса
* body (meaning HTTP response body): тело ответа
* body parameter : body-параметр (or `параметр тела запроса`)
* validate: валидировать (or `выполнить валидацию`)
* requirements (meaning dependencies): зависимости

<img src="/img/tutorial/response-status-code/image01.png">

/// note

Some response codes (see the next section) indicate that the response does not have a body.

FastAPI knows this, and will produce OpenAPI docs that state there is no response body.

///

## About HTTP status codes { #about-http-status-codes }

/// note

If you already know what HTTP status codes are, skip to the next section.

///