* `compresslevel` - GZip 压缩使用的级别，为 1 到 9 的整数。默认为 `9`。值越低压缩越快但文件更大，值越高压缩越慢但文件更小。

## 其它中间件 { #other-middlewares }

除了上述中间件外，FastAPI 还支持其它 ASGI 中间件。

例如：

* [Uvicorn 的 `ProxyHeadersMiddleware`](https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py)
* [MessagePack](https://github.com/florimondmanca/msgpack-asgi)

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[27:30] hl[28] *}

### 반환 타입 생략 { #no-return-type }

반환 타입을 생략할 수도 있습니다. 그러면 FastAPI가 [`jsonable_encoder`](./encoder.md)를 사용해 데이터를 JSON으로 직렬화 가능한 형태로 변환한 뒤 JSON Lines로 전송합니다.

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[33:36] hl[34] *}

## 서버 전송 이벤트(SSE) { #server-sent-events-sse }

## Другие middleware { #other-middlewares }

Существует много других ASGI middleware.

Например:

- [`ProxyHeadersMiddleware` от Uvicorn](https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py)
- [MessagePack](https://github.com/florimondmanca/msgpack-asgi)

由於此函式不是 async，正確的回傳型別是 `Iterable[Item]`：

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[28:31] hl[29] *}

### 無回傳型別 { #no-return-type }

你也可以省略回傳型別。FastAPI 會使用 [`jsonable_encoder`](./encoder.md) 轉換資料並送出。

{* ../../docs_src/server_sent_events/tutorial001_py310.py ln[34:37] hl[35] *}

## `ServerSentEvent` { #serversentevent }

     * @param token the authorization data token
     * @param keys the Kerberos keys for decryption
     * @return a list of parsed authorization data
     * @throws PACDecodingException if the data cannot be decoded
     */
    public static List<KerberosAuthData> parse(int authType, byte[] token, Map<Integer, KerberosKey> keys) throws PACDecodingException {

        List<KerberosAuthData> authorizations = new ArrayList<>();

import okhttp3.internal.http2.Header.Companion.TARGET_SCHEME_UTF8
import okhttp3.internal.immutableListOf
import okio.Sink
import okio.Socket
import okio.Source

/** Encode requests and responses using HTTP/2 frames. */
class Http2ExchangeCodec(
  client: OkHttpClient,
  override val carrier: Carrier,
  private val chain: RealInterceptorChain,
  private val http2Connection: Http2Connection,

## 다른 middleware { #other-middlewares }

다른 ASGI middleware도 많이 있습니다.

예를 들어:

* [Uvicorn의 `ProxyHeadersMiddleware`](https://github.com/encode/uvicorn/blob/master/uvicorn/middleware/proxy_headers.py)
* [MessagePack](https://github.com/florimondmanca/msgpack-asgi)

		var buf bytes.Buffer
		enc := json.NewEncoder(&buf)
		for {
			select {
			case <-doneCh:
				return
			case v, ok := <-subChT:
				if !ok {
					return
				}
				buf.Reset()
				err := enc.Encode(v)
				if err != nil {
					return
				}

				select {
				case subCh <- append(GetByteBuffer()[:0], buf.Bytes()...):
					continue
				case <-doneCh:
					return
				}
			}
		}

     * This constructor is used when loading data from OpenSearch.
     *
     * @param src The source map containing the access result data fields.
     * @throws OpenSearchAccessException if the data cannot be decoded.
     */
    public OpenSearchAccessResultData(final Map<String, Object> src) {
        setTransformerName((String) src.get(TRANSFORMER_NAME));
        setEncoding((String) src.get(ENCODING));

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[27:30] hl[28] *}

### Sem tipo de retorno { #no-return-type }

Você também pode omitir o tipo de retorno. O FastAPI então usará o [`jsonable_encoder`](./encoder.md) para converter os dados em algo que possa ser serializado para JSON e depois enviá-los como JSON Lines.

{* ../../docs_src/stream_json_lines/tutorial001_py310.py ln[33:36] hl[34] *}