<img src="/img/tutorial/websockets/image04.png">

所有这些消息都将使用同一个 WebSocket 连

接。

## 使用 `Depends` 和其他依赖项

在 WebSocket 端点中，您可以从 `fastapi` 导入并使用以下内容：

* `Depends`
* `Security`
* `Cookie`
* `Header`
* `Path`
* `Query`

它们的工作方式与其他 FastAPI 端点/ *路径操作* 相同：

{* ../../docs_src/websockets/tutorial002_an_py310.py hl[68:69,82] *}

/// info

	data, err := readConfig(ctx, api, configFile)
	if err != nil {
		return b, err
	}
	if len(data) <= 4 {
		return b, fmt.Errorf("loadBucketMetadata: no data")
	}
	// Read header
	switch binary.LittleEndian.Uint16(data[0:2]) {
	case bucketMetadataFormat:
	default:
		return b, fmt.Errorf("loadBucketMetadata: unknown format: %d", binary.LittleEndian.Uint16(data[0:2]))
	}

func (config *TierConfigMgr) Bytes() ([]byte, error) {
	config.RLock()
	defer config.RUnlock()
	data := make([]byte, 4, config.Msgsize()+4)

	// Initialize the header.
	binary.LittleEndian.PutUint16(data[0:2], tierConfigFormat)
	binary.LittleEndian.PutUint16(data[2:4], tierConfigVersion)

	// Marshal the tier config
	return config.MarshalMsg(data)
}

      return DnsRecordCodec.decodeAnswers(hostname, responseBytes)
    }
  }

  private fun buildRequest(
    hostname: String,
    type: Int,
  ): Request =
    Request
      .Builder()
      .header("Accept", DNS_MESSAGE.toString())
      .apply {
        val query = DnsRecordCodec.encodeQuery(hostname, type)

        val dnsUrl: HttpUrl = ******@****.***
        if (post) {
          url(dnsUrl)

            throw new IOException("Connection not established");
        }

        try {
            socket.setSoTimeout(timeout);

            // First, read the header to determine message size
            ByteBuffer headerBuffer = ByteBuffer.allocate(4);
            while (headerBuffer.hasRemaining()) {
                int read = socketChannel.read(headerBuffer);

 *  * `com.twitter.hpack.HpackUtil`
 *
 * [twitter_hpack]: https://github.com/twitter/hpack
 */
object Huffman {
  // Appendix C: Huffman Codes
  // http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-12#appendix-B
  private val CODES =
    intArrayOf(
      0x1ff8,
      0x7fffd8,
      0xfffffe2,
      0xfffffe3,
      0xfffffe4,
      0xfffffe5,
      0xfffffe6,
      0xfffffe7,

## Использование `Depends` и не только { #using-depends-and-others }

Вы можете импортировать из `fastapi` и использовать в эндпоинте вебсокета:

* `Depends`
* `Security`
* `Cookie`
* `Header`
* `Path`
* `Query`

Они работают так же, как и в других FastAPI эндпоинтах/*операциях пути*:

{* ../../docs_src/websockets/tutorial002_an_py310.py hl[68:69,82] *}

/// info | Примечание

	config.ExpiryUpdatedAt = nil

	configData, err := xml.Marshal(config)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	if withUpdatedAt {
		w.Header().Set(xhttp.MinIOLifecycleCfgUpdatedAt, updatedAt.Format(iso8601Format))
	}
	// Write lifecycle configuration to client.
	writeSuccessResponseXML(w, configData)
}

	// GCS storage decompresses a gzipped object by default and returns the data.
	// Refer to https://cloud.google.com/storage/docs/transcoding#decompressive_transcoding
	// Need to set `Accept-Encoding` header to `gzip` when issuing a GetObject call, to be able
	// to download the object in compressed state.
	// Calling ReadCompressed with true accomplishes that.

이를 통해 **여러 위치**에서 **모델을 재사용** 할 수 있고 모든 매개변수에 대한 유효성 검사 및 메타데이터를 한 번에 선언할 수도 있습니다. 😍

/// note | 참고

이 기능은 FastAPI 버전 `0.115.0` 이후부터 지원됩니다. 🤓

///

/// tip | 팁

동일한 기술이 `Query`, `Cookie`, 그리고 `Header`에 적용됩니다. 😎

///

## Pydantic 모델을 사용한 쿠키

**Pydantic 모델**에 필요한 **쿠키** 매개변수를 선언한 다음, 해당 매개변수를 `Cookie`로 선언합니다:

{* ../../docs_src/cookie_param_models/tutorial001_an_py310.py hl[9:12,16] *}