// Prepare lifecycle expiration workers
	es := newExpiryState(t.Context(), objAPI, 0)
	globalExpiryState = es

	// Prepare object versions
	obj := "obj-1"
	// Simulate objects uploaded 30 hours ago
	modTime := now.Add(-48 * time.Hour)
	uuids := make([]uuid.UUID, 5)
	for i := range uuids {
		uuids[i] = uuid.UUID([16]byte{15: uint8(i + 1)})
	}
	fivs := make([]FileInfo, 5)
	objInfos := make([]ObjectInfo, 5)

        assertEquals("ftp://123.123.123.123/ccc.txt", ftpInfo.toUrl("/aaa/../ccc.txt"));

        value = "ftp://123.123.123.123/test test.txt";
        ftpInfo = new FtpClient.FtpInfo(value, Constants.UTF_8);
        assertEquals(value, ftpInfo.toUrl());
        assertEquals("123.123.123.123:21", ftpInfo.getCacheKey());
        assertEquals("123.123.123.123", ftpInfo.getHost());

    As always, in FastAPI you can combine `def` and `async def` as needed.

    If you need a refresher about when to use which, check out the section _"In a hurry?"_ in the docs about [`async` and `await`](../async.md#in-a-hurry){.internal-link target=_blank}.

9. This *path operation function* is not returning dataclasses (although it could), but a list of dictionaries with internal data.

**FastAPI** provides several tools to help you deal with **Security** easily, rapidly, in a standard way, without having to study and learn all the security specifications.

But first, let's check some small concepts.

## In a hurry? { #in-a-hurry }

If you don't care about any of these terms and you just need to add security with authentication based on username and password *right now*, skip to the next chapters.

## OAuth2 { #oauth2 }

It doesn't matter. **FastAPI** will know what to do.

/// note

If you don't know, check the [Async: *"In a hurry?"*](../../async.md#in-a-hurry){.internal-link target=_blank} section about `async` and `await` in the docs.

///

## Integrated with OpenAPI { #integrated-with-openapi }

		},
		// The following versions are on-disk.
		{ // restored object version expiring 10 hours from now.
			versionID:        mustGetUUID(),
			dataDir:          d2,
			shares:           2,
			transitionStatus: lifecycle.TransitionComplete,
			restoreObjStatus: completedRestoreObj(time.Now().Add(10 * time.Hour)).String(),
			expireRestored:   true,
		},
		{
			versionID: mustGetUUID(),
			dataDir:   d2,

    // Configurable key rotation limits with defaults
    private volatile long keyRotationBytesLimit = 1L << 30; // Default: 1GB
    private volatile long keyRotationTimeLimit = 24 * 60 * 60 * 1000L; // Default: 24 hours

    // Rotation metrics
    private final AtomicLong totalKeyRotations = new AtomicLong(0);
    private final AtomicLong lastKeyRotationTime = new AtomicLong(0);

    /**

    return {"item_id": item_id, "q": q}
```

**Примітка**:

Стикнувшись з проблемами, не зайвим буде ознайомитися з розділом _"In a hurry?"_ про <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">`async` та `await` у документації</a>.

</details>

### Запустіть

Запустіть server з:

<div class="termy">

```console

@app.get("/items/{item_id}")
async def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

**Lưu ý**:

Nếu bạn không biết, xem phần _"In a hurry?"_ về <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">`async` và `await` trong tài liệu này</a>.

</details>

### Chạy ứng dụng

Chạy server như sau:

<div class="termy">

```console

You could also define it as a normal function instead of `async def`:

{* ../../docs_src/first_steps/tutorial003.py hl[7] *}

/// note

If you don't know the difference, check the [Async: *"In a hurry?"*](../async.md#in-a-hurry){.internal-link target=_blank}.

///

### Step 5: return the content { #step-5-return-the-content }

{* ../../docs_src/first_steps/tutorial001.py hl[8] *}