if r.ContentLength > encryptBufferThreshold {
		// The encryption reads in blocks of 64KB.
		// We add a buffer on bigger files to reduce the number of syscalls upstream.
		content = bufio.NewReaderSize(content, encryptBufferSize)
	}

	var (
		key   []byte
		keyID string
		ctx   kms.Context
		err   error
	)

```

{% endraw %}

...會產生指向與「*路徑操作函式*」`read_item(id=id)` 相同 URL 的連結。

例如，若 ID 為 `42`，會渲染為：

```html
<a href="/items/42">
```

## 模板與靜態檔案 { #templates-and-static-files }

你也可以在模板中使用 `url_for()`，例如搭配你以 `name="static"` 掛載的 `StaticFiles` 使用。

```jinja hl_lines="4"
{!../../docs_src/templates/templates/item.html!}
```

在這個例子中，它會連結到 `static/styles.css` 的 CSS 檔案，內容為：

    }
    File file = out.getFile();
    assertThat(file).isNull();

    // Write data to go over the threshold
    if (chunk2 > 0) {
      write(out, data, chunk1, chunk2, singleByte);
      file = out.getFile();
      assertEquals(dataSize, file.length());
      assertTrue(file.exists());
      assertThat(file.getName()).contains("FileBackedOutputStream");

### Archivos y async { #files-and-async }

En la mayoría de los casos, los objetos tipo archivo no son compatibles con `async` y `await` por defecto.

Por ejemplo, no tienen un `await file.read()`, ni un `async for chunk in file`.

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

             Searching for package file structure from directories with
             <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

rs
ac.rs
co.rs
edu.rs
gov.rs
in.rs
org.rs

// ru : https://cctld.ru/files/pdf/docs/en/rules_ru-rf.pdf
// Submitted by George Georgievsky <******@****.***>
ru

// rw : https://www.ricta.org.rw/sites/default/files/resources/registry_registrar_contract_0.pdf
rw
ac.rw
co.rw
coop.rw
gov.rw
mil.rw
net.rw
org.rw

### Dateien und Async { #files-and-async }

In den meisten Fällen sind dateiähnliche Objekte standardmäßig nicht mit async und await kompatibel.

Beispielsweise haben sie kein `await file.read()` oder `async for chunk in file`.

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

             Searching for package file structure from directories
             with <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

  <span style="background-color:#009485"><font color="#D3D7CF"> FastAPI </font></span>  Starting development server 🚀

             Searching for package file structure from directories with
             <font color="#3465A4">__init__.py</font> files
             Importing from <font color="#75507B">/home/user/code/</font><font color="#AD7FA8">awesomeapp</font>

	}
	var vers [][]xlMetaV2ShallowVersion
	zr, err := zip.NewReader(bytes.NewReader(dataZ), int64(len(dataZ)))
	if err != nil {
		t.Fatal(err)
	}
	for _, file := range zr.File {
		if file.UncompressedSize64 == 0 {
			continue
		}
		in, err := file.Open()
		if err != nil {
			t.Fatal(err)
		}
		defer in.Close()
		buf, err := io.ReadAll(in)
		if err != nil {
			t.Fatal(err)
		}