从 `fastapi.sse` 导入 `ServerSentEvent`：

{* ../../docs_src/server_sent_events/tutorial002_py310.py hl[4,26] *}

`data` 字段始终会被编码为 JSON。你可以传入任何可被序列化为 JSON 的值，包括 Pydantic 模型。

## 原始数据 { #raw-data }

如果你需要发送**不**进行 JSON 编码的数据，请使用 `raw_data` 而不是 `data`。

这对于发送预格式化文本、日志行或特殊的 <dfn title="用于指示特殊条件或状态的值">"哨兵"</dfn> 值（例如 `[DONE]`）很有用。

{* ../../docs_src/server_sent_events/tutorial003_py310.py hl[17] *}

    /**
     * Retrieves synonym dictionary settings with pagination support.
     *
     * @param dictId the dictionary ID
     * @param body the search body containing pagination and filter parameters
     * @return JSON response containing list of synonym dictionary items
     */
    // GET /api/admin/dict/synonym/settings/{dictId}
    @Execute
    public JsonResponse<ApiResult> get$settings(final String dictId, final SearchBody body) {

        decimal_places: int | None = _Unset,
        examples: list[Any] | None = None,
        example: Annotated[
            Any | None,
            deprecated(
                "Deprecated in OpenAPI 3.1.0 that now uses JSON Schema 2020-12, "
                "although still supported. Use examples instead."
            ),
        ] = _Unset,
        openapi_examples: dict[str, Example] | None = None,

```

使用如下 JSON 请求体：

```JSON
{
    "id": "2expen51ve",
    "customer": "Mr. Richie Rich",
    "total": "9999"
}
```

然后，您的 API 就会处理发票，并在某个点之后，发送回调请求至 `callback_url`（外部 API）：

```
https://www.external.org/events/invoices/2expen51ve
```

JSON 请求体包含如下内容：

```JSON
{
    "description": "Payment celebration",
    "paid": true

<span style="color: green;">[INFO]</span> Start watching changes
<span style="color: green;">[INFO]</span> Start detecting changes
```

And even more text

```json
{
    // This is a sample JSON code block
    "greeting": "Hello, world!" // Greeting
}
```

Диаграма Mermaid

```mermaid
flowchart LR
    stone(philosophers-stone) -->|requires| harry-1[harry v1]

package logger_test

import (
	"database/sql/driver"
	"encoding/json"
	"fmt"
	"regexp"
	"strings"
	"testing"

	"github.com/jinzhu/now"
	"gorm.io/gorm/logger"
)

type JSON json.RawMessage

func (j JSON) Value() (driver.Value, error) {
	if len(j) == 0 {
		return nil, nil
	}
	return json.RawMessage(j).MarshalJSON()
}

type ExampleStruct struct {
	Name string
	Val  string
}

		path, prefix, suffix string
		expected             string
	}{
		{"config/iam/groups/foo.json", "config/iam/groups/", ".json", "foo"},
		{"config/iam/groups/./foo.json", "config/iam/groups/", ".json", "foo"},
		{"config/iam/groups/foo/config.json", "config/iam/groups/", "/config.json", "foo"},
		{"config/iam/groups/foo/config.json", "config/iam/groups/", "config.json", "foo"},
	}
	for i, test := range specs {

### Response

If the token is valid and access is approved, the plugin must return a `200` (OK) HTTP status code.

A `200 OK` Response should have `application/json` content-type and body with the following structure:

```json
{
    "user": <string>,
    "maxValiditySeconds": <integer>,
    "claims": <key-value-pairs>
}
```

      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Unauthorized request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Page not found
      content:
        application/json:
          schema:

)

var configMu sync.RWMutex

// Config represents the batch job settings.
type Config struct {
	ReplicationWorkersWait time.Duration `json:"replicationWorkersWait"`
	KeyRotationWorkersWait time.Duration `json:"keyRotationWorkersWait"`
	ExpirationWorkersWait  time.Duration `json:"expirationWorkersWait"`
}

// ExpirationWait returns the duration for which a batch expiration worker
// would wait before working on next object.