{!../../docs_src/security/tutorial001.py!}
```

/// tip | "提示"

在此，`tokenUrl="token"` 指向的是暂未创建的相对 URL `token`。这个相对 URL 相当于 `./token`。

因为使用的是相对 URL，如果 API 位于 `https://example.com/`，则指向 `https://example.com/token`。但如果 API 位于 `https://example.com/api/v1/`，它指向的就是`https://example.com/api/v1/token`。

使用相对 URL 非常重要，可以确保应用在遇到[使用代理](../../advanced/behind-a-proxy.md){.internal-link target=_blank}这样的高级用例时，也能正常运行。

///

 *       href="https://openjdk.java.net/jeps/220">{@code jrt:/} URLs</a>, among <a
 *       href="https://github.com/classgraph/classgraph/wiki/Classpath-specification-mechanisms">others</a>.
 *   <li>It does not know how to look for classes when running under an Android VM. (ClassGraph does
 *       not support this directly, either, but ClassGraph documents how to <a

在FastAPI中仍然可以单独使用 `BackgroundTask`，但您必须在代码中创建对象，并返回包含它的Starlette `Response`。

更多细节查看 <a href="https://www.starlette.io/background/" class="external-link" target="_blank">Starlette's official docs for Background Tasks</a>.

## 告诫

如果您需要执行繁重的后台计算，并且不一定需要由同一进程运行（例如，您不需要共享内存、变量等），那么使用其他更大的工具（如 <a href="https://docs.celeryq.dev" class="external-link" target="_blank">Celery</a>）可能更好。

## Variáveis de Ambiente

/// dica

Se você já sabe o que são variáveis de ambiente e como utilizá-las, sinta-se livre para avançar para o próximo tópico.

///

http:\\\\www.google.com\\foo  s:http h:www.google.com p:/foo
http://foo:80/  s:http h:foo p:/
http://foo:81/  s:http h:foo port:81 p:/
httpa://foo:80/  s:httpa p://foo:80/
http://foo:-80/
https://foo:443/  s:https h:foo p:/
https://foo:80/  s:https h:foo port:80 p:/
ftp://foo:21/  s:ftp h:foo p:/
ftp://foo:80/  s:ftp h:foo port:80 p:/
gopher://foo:70/  s:gopher h:foo p:/
gopher://foo:443/  s:gopher h:foo port:443 p:/

        # Override automatic language detection by changing the below list
        # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
        language: ['java']
        # Learn more...
        # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection

    steps:
    - name: Checkout repository
      uses: actions/checkout@v2

## `jsonable_encoder` 사용

JSON 호환 가능 데이터만 수신하는 `fake_db` 데이터베이스가 존재한다고 가정하겠습니다.

예를 들면, `datetime` 객체는 JSON과 호환되는 데이터가 아니므로 이 데이터는 받아들여지지 않습니다.

따라서 `datetime` 객체는 <a href="https://en.wikipedia.org/wiki/ISO_8601" class="external-link" target="_blank">ISO format</a> 데이터를 포함하는 `str`로 변환되어야 합니다.

같은 방식으로 이 데이터베이스는 Pydantic 모델(속성이 있는 객체)을 받지 않고, `dict` 만을 받습니다.

이를 위해 `jsonable_encoder` 를 사용할 수 있습니다.

storage:
  type: sqlite3
  config:
    file: examples/dex.db

# Configuration for the HTTP endpoints.
web:
  http: 0.0.0.0:5556
  # Uncomment for HTTPS options.
  # https: 127.0.0.1:5554
  # tlsCert: /etc/dex/tls.crt
  # tlsKey: /etc/dex/tls.key

  # Configuration for telemetry
  telemetry:
    http: 0.0.0.0:5558

        {
          "version_info": "2022-03-04T07:18:48Z/22",
          "route_config": {
            "@type": "type.googleapis.com/envoy.config.route.v3.RouteConfiguration",
            "name": "https.443.https.bookinfo-gateway.default",
            "virtual_hosts": [
              {
                "name": "*:443",
                "domains": [
                  "*"
                ],
                "routes": [

	// https://istio.io/docs/setup/platform-setup/
	MinK8SVersion               = 28
	UnSupportedK8SVersionLogMsg = "\nThe Kubernetes version %s is not supported by Istio %s. The minimum supported Kubernetes version is 1.%d.\n" +
		"Proceeding with the installation, but you might experience problems. " +