# 1 second intervals between attempts $MC_COMMAND ; STATUS=$? ; done ; set -e ; # reset `e` as active return 0 } # checkPolicyExists ($policy) # Check if the policy exists, by using the exit code of `mc admin policy info` checkPolicyExists() { POLICY=$1 CMD=$(${MC} admin policy info myminio $POLICY > /dev/null 2>&1) return $? } # createPolicy($name, $filename) createPolicy () { NAME=$1 FILENAME=$2 # Create the name if it does not exist echo "Checking policy: $NAME (in /config/$FILENAME.json)" if...

# 1 second intervals between attempts $MC_COMMAND ; STATUS=$? ; done ; set -e ; # reset `e` as active return 0 } # checkPolicyExists ($policy) # Check if the policy exists, by using the exit code of `mc admin policy info` checkPolicyExists() { POLICY=$1 CMD=$(${MC} admin policy info myminio $POLICY > /dev/null 2>&1) return $? } # createPolicy($name, $filename) createPolicy () { NAME=$1 FILENAME=$2 # Create the name if it does not exist echo "Checking policy: $NAME (in /config/$FILENAME.json)" if...

# 1 second intervals between attempts $MC_COMMAND ; STATUS=$? ; done ; set -e ; # reset `e` as active return 0 } # checkPolicyExists ($policy) # Check if the policy exists, by using the exit code of `mc admin policy info` checkPolicyExists() { POLICY=$1 CMD=$(${MC} admin policy info myminio $POLICY > /dev/null 2>&1) return $? } # createPolicy($name, $filename) createPolicy () { NAME=$1 FILENAME=$2 # Create the name if it does not exist echo "Checking policy: $NAME (in /config/$FILENAME.json)" if...

# 1 second intervals between attempts $MC_COMMAND ; STATUS=$? ; done ; set -e ; # reset `e` as active return 0 } # checkPolicyExists ($policy) # Check if the policy exists, by using the exit code of `mc admin policy info` checkPolicyExists() { POLICY=$1 CMD=$(${MC} admin policy info myminio $POLICY > /dev/null 2>&1) return $? } # createPolicy($name, $filename) createPolicy () { NAME=$1 FILENAME=$2 # Create the name if it does not exist echo "Checking policy: $NAME (in /config/$FILENAME.json)" if...

你可以使用 Server-Sent Events（SSE）把資料串流傳送給用戶端。

這與[串流 JSON Lines](stream-json-lines.md)類似，但使用瀏覽器原生支援、透過 [`EventSource` API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource) 的 `text/event-stream` 格式。

/// info

在 FastAPI 0.135.0 新增。

///

## 什麼是 Server-Sent Events？ { #what-are-server-sent-events }

SSE 是一種透過 HTTP 從伺服器向用戶端串流傳送資料的標準。

每個事件都是一個小型文字區塊，包含 `data`、`event`、`id` 和 `retry` 等「欄位」，並以空白行分隔。

看起來像這樣：

기본적으로 단일 값은 쿼리 매개변수로 해석되므로, 명시적으로 `Query`를 추가할 필요 없이 이렇게 하면 됩니다:

```Python
q: str | None = None
```

예를 들어:

{* ../../docs_src/body_multiple_params/tutorial004_an_py310.py hl[28] *}


/// info | 정보

`Body` 또한 `Query`, `Path` 그리고 이후에 볼 다른 것들과 마찬가지로 동일한 추가 검증과 메타데이터 매개변수를 모두 갖고 있습니다.

///

## 단일 본문 매개변수 삽입하기 { #embed-a-single-body-parameter }

Pydantic 모델 `Item`에서 가져온 단일 `item` 본문 매개변수만 있다고 하겠습니다.

	// Returns healing information for a newly replaced disk,
	// returns 'nil' once healing is complete or if the disk
	// has never been replaced.
	Healing() *healingTracker
	DiskInfo(ctx context.Context, opts DiskInfoOptions) (info DiskInfo, err error)
	NSScanner(ctx context.Context, cache dataUsageCache, updates chan<- dataUsageEntry, scanMode madmin.HealScanMode, shouldSleep func() bool) (dataUsageCache, error)

	// Volume operations.

                MessageBuilder buff = MessageUtils.builder();
                buff.a("Message styles: ");
                buff.trace("trace").a(' ');
                buff.debug("debug").a(' ');
                buff.info("info").a(' ');
                buff.warning("warning").a(' ');
                buff.error("error").a(' ');
                buff.success("success").a(' ');
                buff.failure("failure").a(' ');

例えば、`str` の `list` の変数を定義してみましょう。

同じコロン（`:`）の構文で変数を宣言します。

型として、`list` を指定します。

リストはいくつかの内部の型を含む型なので、それらを角括弧で囲みます:

{* ../../docs_src/python_types/tutorial006_py310.py hl[1] *}

/// info | 情報

角括弧内の内部の型は「型パラメータ」と呼ばれています。

この場合、`str` は `list` に渡される型パラメータです。

///

つまり: 変数 `items` は `list` であり、このリストの各項目は `str` です。

そうすることで、エディタはリストの項目を処理している間にもサポートを提供できます。

To achieve that, first import:

* `Query` from `fastapi`
* `Annotated` from `typing`

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[1,3] *}

/// info

FastAPI added support for `Annotated` (and started recommending it) in version 0.95.0.

If you have an older version, you would get errors when trying to use `Annotated`.