return key, err
}

// EncryptSinglePart encrypts an io.Reader which must be the
// body of a single-part PUT request.
func EncryptSinglePart(r io.Reader, key ObjectKey) io.Reader {
	r, err := sio.EncryptReader(r, sio.Config{MinVersion: sio.Version20, Key: key[:]})
	if err != nil {
		logger.CriticalIf(context.Background(), errors.New("Unable to encrypt io.Reader using object key"))
	}
	return r
}

class="popover" role="tooltip"><div class="popover-arrow"></div><h3 class="popover-header"></h3><div class="popover-body"></div></div>',trigger:"click"},xe={...Ne.DefaultType,content:"(null|string|element|function)"};class Me extends Ne{static get Default(){return Pe}static get DefaultType(){return xe}static get NAME(){return"popover"}_isWithContent(){return this._getTitle()||this._getContent()}_getContentForTemplate(){return{".popover-header":this._getTitle(),".popover-body":this._getContent()}}_getContent(){return...

    response = client.get("/items?token=jessica", headers={"X-Token": "invalid"})
    assert response.status_code == 400
    assert response.json() == {"detail": "X-Token header invalid"}


def test_items_bar_with_invalid_token(client: TestClient):
    response = client.get("/items/bar?token=jessica", headers={"X-Token": "invalid"})
    assert response.status_code == 400

func (r *Reader) AddChecksumNoTrailer(headers http.Header, ignoreValue bool) error {
	cs, err := GetContentChecksum(headers)
	if err != nil {
		return ErrInvalidChecksum
	}
	if cs == nil {
		return nil
	}
	r.contentHash = *cs
	return r.AddNonTrailingChecksum(cs, ignoreValue)
}

// AddNonTrailingChecksum will add a checksum to the reader.
// The checksum cannot be trailing.

	o = msgp.Require(b, z.Msgsize())
	// map header, size 4
	// string "APIVersion"
	o = append(o, 0x84, 0xaa, 0x41, 0x50, 0x49, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e)
	o = msgp.AppendString(o, z.APIVersion)
	// string "Flags"
	o = append(o, 0xa5, 0x46, 0x6c, 0x61, 0x67, 0x73)
	// map header, size 3
	// string "Filter"
	o = append(o, 0x83, 0xa6, 0x46, 0x69, 0x6c, 0x74, 0x65, 0x72)

	// already present we can blindly use the
	// authToken as is instead of adding 'Bearer'
	tokens := strings.Fields(target.args.AuthToken)
	switch len(tokens) {
	case 2:
		req.Header.Set("Authorization", target.args.AuthToken)
	case 1:
		req.Header.Set("Authorization", "Bearer "+target.args.AuthToken)
	}

	req.Header.Set("Content-Type", "application/json")

	return target.httpClient.Do(req)
}

* [X-Forwarded-Proto](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Proto)
* [X-Forwarded-Host](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Host)

///

### Proxy-Forwarded-Header aktivieren { #enable-proxy-forwarded-headers }

///

## Mit `Last-Event-ID` fortsetzen { #resuming-with-last-event-id }

Wenn ein Browser nach einem Verbindungsabbruch erneut verbindet, sendet er die zuletzt empfangene `id` im Header `Last-Event-ID`.

Sie können ihn als Header-Parameter einlesen und verwenden, um den Stream dort fortzusetzen, wo der Client aufgehört hat:

{* ../../docs_src/server_sent_events/tutorial004_py310.py hl[25,27,31] *}

Немного текста со ссылкой на [FastAPI](https://fastapi.tiangolo.com).

## Заголовок 2 { #header-2 }

Две ссылки здесь: [How to](https://fastapi.tiangolo.com/how-to/) и [Project Generators](project-generation.md){.internal-link target=_blank}.

### Заголовок 3 { #header-3 }

Ещё ссылка: [**FastAPI** Генераторы Проектов](project-generation.md "Тайтл"){.internal-link target=_blank} с тайтлом.

# Заголовок 4 { #header-4 }

		return
	}
	for za0001 := range z {
		// map header, size 2
		// write "Totals"
		err = en.Append(0x82, 0xa6, 0x54, 0x6f, 0x74, 0x61, 0x6c, 0x73)
		if err != nil {
			return
		}
		err = en.WriteArrayHeader(uint32(60))
		if err != nil {
			err = msgp.WrapError(err, za0001, "Totals")
			return
		}
		for za0002 := range z[za0001].Totals {
			// map header, size 3
			// write "Total"