## Der `password`-Flow { #the-password-flow }

Lassen Sie uns nun etwas zurückgehen und verstehen, was das alles ist.

Der `password`-„Flow“ ist eine der in OAuth2 definierten Wege („Flows“) zur Handhabung von Sicherheit und Authentifizierung.

OAuth2 wurde so konzipiert, dass das Backend oder die API unabhängig vom Server sein kann, der den Benutzer authentifiziert.

	// Check desired format.
	if wantFormat := h.Format; wantFormat != FormatUnknown {
		if wantFormat.has(FormatPAX) && !preferPAX {
			wantFormat.mayBe(FormatUSTAR) // PAX implies USTAR allowed too
		}
		format.mayOnlyBe(wantFormat) // Set union of formats allowed and format wanted
	}
	if format == FormatUnknown {
		switch h.Format {
		case FormatUSTAR:
			err = headerError{"Format specifies USTAR", whyNoUSTAR, whyOnlyPAX, whyOnlyGNU}

* Methoden.
* Request-Payloads im Body, Query-Parameter, usw.
* Response-Payloads.

Sie erhalten auch **Inline-Fehlerberichte** für alles.

To improve this, we’re working on automation tools 🤖 to manage translations more efficiently. Once ready, documentation will be machine-translated and still reviewed by at least two native speakers ✅ before publishing. This will allow us to keep translations up-to-date while reducing the review burden on maintainers.

What’s changing now:

* 🚫 We’re no longer accepting new community-submitted translation PRs.

## Eine Anwendung mit Callbacks { #an-app-with-callbacks }

Sehen wir uns das alles anhand eines Beispiels an.

Stellen Sie sich vor, Sie entwickeln eine Anwendung, mit der Sie Rechnungen erstellen können.

                       Version 3, 19 November 2007

 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

  The GNU Affero General Public License is a free, copyleft license for
software and other kinds of works, specifically designed to ensure

	if errMetaCode != ErrNone {
		return errMetaCode
	}

	// If the host which signed the request is slightly ahead in time (by less than globalMaxSkewTime) the
	// request should still be allowed.
	if pSignValues.Date.After(UTCNow().Add(globalMaxSkewTime)) {
		return ErrRequestNotReadyYet
	}

	if UTCNow().Sub(pSignValues.Date) > pSignValues.Expires {
		return ErrExpiredPresignRequest
	}

//	sub-second times  |     no |       yes |        no
//	sparse files      |     no |       yes |       yes
//
// The table's upper portion shows the [Header] fields, where each format reports
// the maximum number of bytes allowed for each string field and
// the integer type used to store each numeric field
// (where timestamps are stored as the number of seconds since the Unix epoch).
//

	return h&flag != 0
}

// s3APIMiddleware - performs some common handler functionality for S3 API
// handlers.
//
// It is set per-"handler function registration" in the router to allow for
// behavior modification via flags.
//
// This middleware always calls `collectAPIStats` to collect API stats.
//
// The passed in handler function must be a method of `objectAPIHandlers` for

		if err != nil {
			// if not found, check if DN
			if strings.Contains(err.Error(), "User DN not found for:") {
				if isDN {
					// warn user that DNs are not allowed
					writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrAdminLDAPExpectedLoginName, err), r.URL)
				} else {
					writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErrWithErr(ErrAdminNoSuchUser, err), r.URL)
				}