{* ../../docs_src/middleware/tutorial001_py310.py hl[8:9,11,14] *}

/// tip | Совет

Имейте в виду, что можно добавлять проприетарные HTTP-заголовки [с префиксом `X-`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers).

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      .isTrue()
  }

  @Test fun parseAll() {
    val headers =
      Headers
        .Builder()
        .add("Set-Cookie: a=b")
        .add("Set-Cookie: c=d")
        .build()
    val cookies = parseAll(url, headers)
    assertThat(cookies.size).isEqualTo(2)
    assertThat(cookies[0].toString()).isEqualTo("a=b; path=/")

            out.print(text);
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }

    /**
     * Writes custom headers to the HTTP response.
     * @param response The HTTP servlet response.
     */
    protected abstract void writeHeaders(final HttpServletResponse response);

## 檢視文件 { #check-the-docs }

你可以在 `/docs` 的文件介面看到所需的標頭：

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

## 禁止額外標頭 { #forbid-extra-headers }

在某些特殊情境（可能不常見）下，你可能想限制允許接收的標頭。

你可以使用 Pydantic 的模型設定來 `forbid` 任何 `extra` 欄位：

{* ../../docs_src/header_param_models/tutorial002_an_py310.py hl[10] *}

如果用戶端嘗試傳送額外的標頭，會收到錯誤回應。

* They need to handle cleanup (e.g., DB sessions, file handles), using dependencies with `yield`
* Their logic needs input data from the request, like headers, query parameters, etc.

## Dependencies with `yield` and `scope`

When using dependencies with `yield`, they can have a `scope` that defines when the exit code is run.

    def generateDocForType(Document document, DslDocModel model, ClassMetaDataRepository<ClassLinkMetaData> linkRepository, gradlebuild.docs.dsl.docbook.model.ClassDoc classDoc) {
        try {
            //classDoc renderer renders the content of the class and also links to properties/methods
            new ClassDocRenderer(new LinkRenderer(document, model)).mergeContent(classDoc, document.documentElement)

* Verwenden Sie die von Ihnen erstellten `templates`, um eine `TemplateResponse` zu rendern und zurückzugeben, übergeben Sie den Namen des Templates, das Requestobjekt und ein „Kontext“-<abbr title="Dictionary – Zuordnungstabelle: In anderen Sprachen auch Hash, Map, Objekt, Assoziatives Array genannt">Dictionary</abbr> mit Schlüssel-Wert-Paaren,...

{* ../../docs_src/middleware/tutorial001_py310.py hl[8:9,11,14] *}

/// tip

Пам’ятайте, що власні пропрієтарні заголовки можна додавати [використовуючи префікс `X-`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers).

		requestXML []byte // override request XML
		wantResult string
		wantErr    bool
	}{
		{
			name:  "select-all",
			input: testInput,
			query: ``,
			// Since we are doing offset, no headers are used.
			wantResult: `{"_1":"2","_2":"2017-01-02T03:04Z","_3":"-5","_4":" 0.765111","_5":""}`,
			requestXML: []byte(`<?xml version="1.0" encoding="UTF-8"?>
<SelectObjectContentRequest>