def request_response(
    func: Callable[[Request], Awaitable[Response] | Response],
) -> ASGIApp:
    """
    Takes a function or coroutine `func(request) -> response`,
    and returns an ASGI application.
    """
    f: Callable[[Request], Awaitable[Response]] = (
        func  # type: ignore[assignment]  # ty: ignore[unused-ignore-comment]
        if is_async_callable(func)

INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [2248755] using WatchFiles
INFO:     Started server process [2248757]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>關於指令 <code>fastapi dev</code>...</summary>

	// arbitrary file sizes, filenames of arbitrary encoding and length,
	// sparse files, and other features.
	//
	// It is recommended that PAX be chosen over GNU unless the target
	// application can only parse GNU formatted archives.
	//
	// Reference:
	//	https://www.gnu.org/software/tar/manual/html_node/Standard.html
	FormatGNU

	// Schily's tar format, which is incompatible with USTAR.

constraints.TypeAny.message = {item} 无法转换为 {propertyType}。
constraints.UriType.message = {item} 包含无法识别的 URI。
constraints.CronExpression.message = {item} 不是有效的 CRON 表达式。

# ----------------------------------------------------------
# Application Exception
# ---------------------
# /- - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure = 登录失败。

func (a *Args) Validate() error {
	req, err := http.NewRequest(http.MethodPost, a.URL.String(), bytes.NewReader([]byte("")))
	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", "application/json")
	if a.AuthToken != "" {
		req.Header.Set("Authorization", a.AuthToken)
	}

	client := &http.Client{Transport: a.Transport}
	resp, err := client.Do(req)
	if err != nil {
		return err
	}

		maxWorkers:  int64(maxWorkers),
		httpTimeout: config.HTTPTimeout,
	}
	h.status.Store(statusOffline)

	if config.BatchSize > 1 {
		h.payloadType = ""
	} else {
		h.payloadType = "application/json"
	}

	// If proxy available, set the same
	if h.config.Proxy != "" {
		proxyURL, _ := url.Parse(h.config.Proxy)
		transport := h.config.Transport
		if tr, ok := transport.(*http.Transport); ok {

```Python hl_lines="2"
@app.get('/')
def results():
    results = some_library()
    return results
```

---

If your application (somehow) doesn't have to communicate with anything else and wait for it to respond, use `async def`, even if you don't need to use `await` inside.

---

If you just don't know, use normal `def`.

---

{* ../../docs_src/behind_a_proxy/tutorial004_py310.py hl[9] *}

그러면 OpenAPI 스키마에 포함되지 않습니다.

## 서브 애플리케이션 마운트하기 { #mounting-a-sub-application }

프록시에서 `root_path`를 사용하면서도, [서브 애플리케이션 - 마운트](sub-applications.md)에 설명된 것처럼 서브 애플리케이션을 마운트해야 한다면, 기대하는 대로 일반적으로 수행할 수 있습니다.

			crypto.MetaAlgorithm:                   "DAREv2-HMAC-SHA256",
			crypto.MetaSealedKeySSEC:               "IAA8PGAA==",
			ReservedMetadataPrefix + "actual-size": "594870264",
			"content-type":                         "application/octet-stream",
			"etag":                                 "166b1545b4c1535294ee0686678bea8c-2",
		},
		Parts: []ObjectPartInfo{
			{
				Number:     1,
				Size:       297580380,
				ActualSize: 297435132,

    # and dropping support for any version of Pydantic before that one (so, in a very long time)
    def bytes_schema(self, schema: CoreSchema) -> JsonSchemaValue:
        json_schema = {"type": "string", "contentMediaType": "application/octet-stream"}
        bytes_mode = (
            self._config.ser_json_bytes
            if self.mode == "serialization"
            else self._config.val_json_bytes
        )
        if bytes_mode == "base64":