This document focuses on showing a working example on how to use Object Lambda with MinIO, you must have [MinIO deployed in your environment](https://docs.min.io/community/minio-object-store/operations/installation.html) before you can start using external lambda functions. You also must install Python version 3.8 or later for the lambda handlers to work.

## Example Lambda handler

Install the necessary dependencies.
```sh

    //                                                                      ==============
    /**
     * Displays the system information page with environment, properties, and configuration details.
     *
     * @return HTML response for the system info page
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index() {
        return asHtml(path_AdminSysteminfo_AdminSysteminfoJsp).renderWith(data -> {

    assertThat(cacheControl.toString()).isEqualTo(header)
  }

  @Test
  @Throws(Exception::class)
  fun parseIgnoreCacheControlExtensions() {
    // Example from http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9.6
    val header = "private, community=\"UCI\""
    val cacheControl =
      parse(
        Headers
          .Builder()
          .set("Cache-Control", header)
          .build(),
      )

## 技術詳細 { #technical-details }

FastAPI は SSE のいくつかのベストプラクティスを標準で実装しています。

- メッセージがない場合は 15 秒ごとに「キープアライブ」用の `ping` コメントを送信し、一部のプロキシが接続を閉じるのを防ぎます（[HTML 仕様: Server-Sent Events](https://html.spec.whatwg.org/multipage/server-sent-events.html#authoring-notes) の推奨に従います）。
- ストリームの**キャッシュを防止**するため、`Cache-Control: no-cache` ヘッダーを設定します。
- Nginx など一部のプロキシでの**バッファリングを防ぐ**ため、特別なヘッダー `X-Accel-Buffering: no` を設定します。

  @JvmField @RegisterExtension
  val clientTestRule =
    OkHttpClientTestRule().apply {
      recordFrames = true
      // recordSslDebug = true
    }

  // https://tools.ietf.org/html/rfc6066#page-6 specifies a FQDN is required.
  val hostname = "local.host"
  private val handshakeCertificates =
    run {
      // Generate a self-signed cert for the server to serve and the client to trust.

            task.from(project.zipTree(groovyPackageListConf.map(Configuration::getSingleFile)));
            // See https://docs.oracle.com/en/java/javase/21/docs/specs/man/javadoc.html#option-linkoffline
            task.include("package-list", "element-list");
            task.into(layout.getBuildDirectory().dir("groovyPackageList"));
        });

    }

    /**
     * Show the index page.
     * @return The HTML response.
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index() {
        saveToken();
        return asListHtml();
    }

    /**
     * Upload a file.
     * @param form The upload form.
     * @return The HTML response.
     */
    @Execute
    @Secured({ ROLE })

  // but essentially each line will be a call to a Preconditions method that, but for a documented
  // change would be a compiler error.
  // See https://docs.oracle.com/javase/specs/jls/se25/html/jls-15.html#jls-15.12.2 for the spec on
  // how javac selects overloads
  @SuppressWarnings("null")
  public void overloadSelection() {
    Boolean boxedBoolean = null;
    boolean aBoolean = true;

  // but essentially each line will be a call to a Preconditions method that, but for a documented
  // change would be a compiler error.
  // See https://docs.oracle.com/javase/specs/jls/se25/html/jls-15.html#jls-15.12.2 for the spec on
  // how javac selects overloads
  @SuppressWarnings("null")
  public void overloadSelection() {
    Boolean boxedBoolean = null;
    boolean aBoolean = true;

[googlecloud_ssl_policy]: https://cloud.google.com/load-balancing/docs/ssl-policies-concepts
[http2_denylist]: https://tools.ietf.org/html/rfc7540#appendix-A
[http2_naughty]: #http2_naughty