* Import `HTMLResponse`.
* Pass `HTMLResponse` as the parameter `response_class` of your *path operation decorator*.

{* ../../docs_src/custom_response/tutorial002_py310.py hl[2,7] *}

/// info

The parameter `response_class` will also be used to define the "media type" of the response.

In this case, the HTTP header `Content-Type` will be set to `text/html`.

And it will be documented as such in OpenAPI.

        assertThat(set.contains(ResultPrinter.class.getName()), is(true));
        assertThat(set.contains(TestRunner.class.getName()), is(true));
        assertThat(set.contains("junit.textui.package-info"), is(false));
        assertThat(set.contains(junit.extensions.TestDecorator.class.getName()), is(not(true)));
    }

/// note | 注意

`Header` 與 `Path`、`Query`、`Cookie` 是「姊妹」類別，同樣繼承自共同的 `Param` 類別。

但請記得，當你從 `fastapi` 匯入 `Query`、`Path`、`Header` 等時，它們其實是會回傳特殊類別的函式。

///

/// info | 說明

要宣告標頭，必須使用 `Header`，否則參數會被解讀為查詢參數。

///

## 自動轉換 { #automatic-conversion }

在 `Path`、`Query`、`Cookie` 提供的功能之上，`Header` 還有一些額外的小功能。

大多數標準標頭的單字以連字號（減號，`-`）分隔。

                            <c:if test="${duplicateHostPager.allRecordCount == 0}">
                                <div class="row top10"><div class="col-sm-12 empty-list-placeholder"><i class="fa fa-info-circle text-primary" aria-hidden="true"></i>
                                        <la:message key="labels.list_could_not_find_crud_table"/>
                                    </div>
                                </div>

                            <c:if test="${relatedQueryPager.allRecordCount == 0}">
                                <div class="row top10"><div class="col-sm-12 empty-list-placeholder"><i class="fa fa-info-circle text-primary" aria-hidden="true"></i>
                                        <la:message key="labels.list_could_not_find_crud_table"/>
                                    </div>
                                </div>

            throws RepositoryMetadataResolutionException {
        RepositoryMetadata metadata = new SnapshotArtifactRepositoryMetadata(artifact);

        getLogger().info("Retrieving previous build number from " + remoteRepository.getId());
        repositoryMetadataManager.resolveAlways(metadata, localRepository, remoteRepository);

        int buildNumber = 0;

	"github.com/minio/minio/internal/mcontext"

	xhttp "github.com/minio/minio/internal/http"
)

const contextAuditKey = contextKeyType("audit-entry")

// SetAuditEntry sets Audit info in the context.
func SetAuditEntry(ctx context.Context, audit *audit.Entry) context.Context {
	if ctx == nil {
		LogIf(context.Background(), "audit", fmt.Errorf("context is nil"))
		return nil
	}

### Check the automatic API docs { #check-the-automatic-api-docs }

Now, run the `fastapi` command:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

And open the docs at [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

                            <c:if test="${fileConfigPager.allRecordCount == 0}">
                                <div class="row top10"><div class="col-sm-12 empty-list-placeholder"><i class="fa fa-info-circle text-primary" aria-hidden="true"></i>
                                        <la:message key="labels.list_could_not_find_crud_table"/>
                                    </div>
                                </div>

                .setLoggerName("test.logger")
                .setLevel(Level.INFO)
                .setMessage(new SimpleMessage("test info message"))
                .build();

        LogEvent result = policy.rewrite(infoEvent);

        assertSame(infoEvent, result);
        assertEquals(Level.INFO, result.getLevel());
    }

    @Test
    public void test_rewrite_debug_level() {