* <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Host" class="external-link" target="_blank">X-Forwarded-Host</a>

///

Trotzdem, da der **Anwendungsserver** nicht weiß, dass er sich hinter einem vertrauenswürdigen **Proxy** befindet, würde er diesen Headern standardmäßig nicht vertrauen.

	// flag bit is set. However, there are several problems:
	//
	//	* Many ZIP readers still do not support UTF-8.
	//	* If the UTF-8 flag is cleared, several readers simply interpret the
	//	name and comment fields as whatever the local system encoding is.
	//
	// In order to avoid breaking readers without UTF-8 support,
	// we avoid setting the UTF-8 flag if the strings are CP-437 compatible.

## Pydantic 모델을 사용한 헤더 매개변수

**Pydantic 모델**에 필요한 **헤더 매개변수**를 선언한 다음, 해당 매개변수를 `Header`로 선언합니다:

{* ../../docs_src/header_param_models/tutorial001_an_py310.py hl[9:14,18] *}

**FastAPI**는 요청에서 받은 **헤더**에서 **각 필드**에 대한 데이터를 **추출**하고 정의한 Pydantic 모델을 줍니다.

## 문서 확인하기

문서 UI `/docs`에서 필요한 헤더를 볼 수 있습니다:

<div class="screenshot">
<img src="/img/tutorial/header-param-models/image01.png">
</div>

## 추가 헤더 금지하기

///

## Параметри Заголовків з Використанням Pydantic Model

Оголосіть потрібні **параметри заголовків** у **Pydantic моделі**, а потім оголосіть параметр як `Header`:

{* ../../docs_src/header_param_models/tutorial001_an_py310.py hl[9:14,18] *}

FastAPI буде витягувати дані для кожного поля з заголовків у запиті та передавати їх у створену Вами Pydantic модель.

		return map[string]string{}
	}
	return map[string]string{
		"requestId":      w.Header().Get(xhttp.AmzRequestID),
		"nodeId":         w.Header().Get(xhttp.AmzRequestHostID),
		"content-length": w.Header().Get(xhttp.ContentLength),
		// Add more fields here.
	}
}

// Trims away `aws-chunked` from the content-encoding header if present.
// Streaming signature clients can have custom content-encoding such as

        if (truncated) {
          socket.close()
        }
      } else {
        // read a frame
        val inFrame = InFrame(i, reader)
        reader.nextFrame(false, inFrame)
        inFrames.add(inFrame)
      }
    }
  }

  fun openSocket(): Socket = Socket("localhost", port)

  @Synchronized override fun close() {

    // The most common case is that from is a Reader (like InputStreamReader or StringReader) so
    // take advantage of that.
    if (from instanceof Reader) {
      // optimize for common output types which are optimized to deal with char[]
      if (to instanceof StringBuilder) {
        return copyReaderToBuilder((Reader) from, (StringBuilder) to);
      } else {
        return copyReaderToWriter((Reader) from, asWriter(to));
      }
    }

...

                                "Header One": {
                                    "summary": "Header One Summary",
                                    "description": "Header One Description",
                                    "value": "header1",
                                },
                                "Header Two": {"value": "header2"},
                            },
                        }

					Method:   r.Method,
					RawQuery: redactLDAPPwd(r.URL.RawQuery),
					Client:   handlers.GetSourceIP(r),
					Headers:  reqHeaders,
					Path:     reqPath,
					Body:     reqRecorder.Data(),
				},
				RespInfo: madmin.TraceResponseInfo{
					Time:       reqEndTime,
					Headers:    respRecorder.Header().Clone(),
					StatusCode: respRecorder.StatusCode,
					Body:       respRecorder.Body(),
				},