*
   * @since 8.0
   */
  public static final byte EOT = 4;

  /**
   * Enquiry: A communication control character used in data communication systems as a request for
   * a response from a remote station. It may be used as a "Who Are You" (WRU) to obtain
   * identification, or may be used to obtain station status, or both.
   *
   * @since 8.0
   */

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Voorbeeld upgrade

Pas nu het bestand `main.py` aan om de body van een `PUT` request te ontvangen.

Dankzij Pydantic kunnen we de body declareren met standaard Python types.

```Python hl_lines="4  9-12  25-27"
from typing import Union

from fastapi import FastAPI

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Necessário para suporte a `SessionMiddleware`.

		"--ctmask", fmt.Sprintf("0x%x", InpodRestoreMask),
	)

	if redirectDNS {
		// CLI: -A ISTIO_OUTPUT ! -o lo -p udp -m udp --dport 53 -j REDIRECT --to-port 15053
		//
		// DESC: If this is a UDP DNS request to a non-localhost resolver, send it to ztunnel DNS proxy port
		iptablesBuilder.AppendRule(
			iptableslog.UndefinedCommand, ChainInpodOutput, iptablesconstants.NAT,
			"!", "-o", "lo",
			"-p", "udp",

	}

	if u.Credentials.SessionToken != "" {
		jwtClaims, err := extractJWTClaims(u)
		if err != nil {
			if u.Credentials.IsTemp() {
				// We should delete such that the client can re-request
				// for the expiring credentials.
				iamOS.deleteIAMConfig(ctx, getUserIdentityPath(user, userType))
				iamOS.deleteIAMConfig(ctx, getMappedPolicyPath(user, userType, false))
			}
			return u, errNoSuchUser

* <a href="https://pythonhosted.org/itsdangerous/" target="_blank"><code>itsdangerous</code></a> - Nílò fún àtìlẹ́yìn `SessionMiddleware`.

* <a href="https://github.com/Kludex/python-multipart" target="_blank"><code>python-multipart</code></a> - در صورتی که بخواهید با استفاده از `request.form()` از قابلیت <abbr title="تبدیل رشته متنی موجود در درخواست HTTP به انواع داده پایتون">"تجزیه (parse)"</abbr> فرم استفاده کنید.

pkg net, type Dialer struct, FallbackDelay time.Duration
pkg net, type OpError struct, Source Addr
pkg net/http, type Request struct, Cancel <-chan struct
pkg net/http/fcgi, var ErrConnClosed error
pkg net/http/fcgi, var ErrRequestAborted error
pkg net/http/pprof, func Trace(http.ResponseWriter, *http.Request)
pkg net/mail, method (*AddressParser) Parse(string) (*Address, error)

errors.app.db.already.deleted = 他の処理で削除されている可能性があります。再度、操作をやり直してください。
errors.app.db.already.updated = 他の処理で更新されている可能性があります。再度、操作をやり直してください。
errors.app.db.already.exists = データがすでに存在しています。再度、操作をやり直してください。
errors.app.double.submit.request = このリクエストの前に処理されている場合があります。再度、操作をやり直してください。
# _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
# you can define your messages here:
# e.g.
# errors.xxx = ...
# info.xxx = ...

          "interval": "1m",
          "intervalFactor": 2,
          "legendFormat": "{{bucket,api}}",
          "refId": "A"
        }
      ],
      "title": "S3 API Request 4xx Error Rate",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {