{* ../../docs_src/request_form_models/tutorial002_an_py310.py hl[12] *}

If a client tries to send some extra data, they will receive an **error** response.

For example, if the client tries to send the form fields:

* `username`: `Rick`
* `password`: `Portal Gun`
* `extra`: `Mr. Poopybutthole`

They will receive an error response telling them that the field `extra` is not allowed:

```json
{
    "detail": [
        {

            assertThrows(CIFSException.class, handle::getSessionKey);
        }
    }

    @Nested
    @DisplayName("Send/Receive Fragment Tests")
    class SendReceiveFragmentTests {

        @Test
        @DisplayName("Should send and receive fragment successfully")
        void testDoSendReceiveFragment_Success() throws Exception {
            DcerpcPipeHandle handle = createMockedDcerpcPipeHandle();

/// note | 기술 세부사항

`Request`에는 `request.scope` 속성이 있는데, 이는 요청과 관련된 메타데이터를 담고 있는 Python `dict`입니다.

`Request`에는 또한 `request.receive`가 있는데, 이는 요청의 바디를 "받기(receive)" 위한 함수입니다.

`scope` `dict`와 `receive` 함수는 모두 ASGI 명세의 일부입니다.

그리고 이 두 가지, `scope`와 `receive`가 새로운 `Request` 인스턴스를 만드는 데 필요한 것들입니다.

`Request`에 대해 더 알아보려면 [Starlette의 Requests 문서](https://www.starlette.dev/requests/)를 확인하세요.

///

A `Request` also has a `request.receive`, that's a function to "receive" the body of the request.

The `scope` `dict` and `receive` function are both part of the ASGI specification.

And those two things, `scope` and `receive`, are what is needed to create a new `Request` instance.

    }

    /**
     * Get the maximum size for receive operations
     *
     * @return maximum receive size in bytes
     */
    public int getMaxReceiveSize() {
        return maxReceiveSize;
    }

    /**
     * Set the maximum size for receive operations
     *
     * @param maxReceiveSize maximum receive size in bytes
     */
    public void setMaxReceiveSize(int maxReceiveSize) {

    }

    /**
     * Calculate average receive latency in microseconds
     *
     * @return average receive latency
     */
    public double getAverageReceiveLatencyMicros() {
        long receives = rdmaReceives.get();
        if (receives == 0) {
            return 0.0;
        }
        return totalReceiveTime.get() / (double) receives / 1000.0; // Convert to microseconds
    }

    /**

# Request Files { #request-files }

You can define files to be uploaded by the client using `File`.

/// info

To receive uploaded files, first install [`python-multipart`](https://github.com/Kludex/python-multipart).

Make sure you create a [virtual environment](../virtual-environments.md), activate it, and then install it, for example:

```console
$ pip install python-multipart
```

This is because uploaded files are sent as "form data".

You can use Pydantic's model configuration to `forbid` any `extra` fields:

{* ../../docs_src/header_param_models/tutorial002_an_py310.py hl[10] *}

If a client tries to send some **extra headers**, they will receive an **error** response.

If a client tries to send some **extra cookies**, they will receive an **error** response.

Poor cookie banners with all their effort to get your consent for the <dfn title="This is another joke. Don't pay attention to me. Have some coffee for your cookie. ☕">API to reject it</dfn>. 🍪

     * @throws CIFSException if an error occurs retrieving the buffer size
     */
    int getSendBufferSize() throws CIFSException;

    /**
     * Gets the receive buffer size of the underlying SMB connection
     * @return the receive buffer size of the underlying connection
     * @throws CIFSException if an error occurs retrieving the buffer size
     */
    int getReceiveBufferSize() throws CIFSException;

    /**