This is not a limitation of **FastAPI**, it's part of the HTTP protocol.

///

## Recap

  @SuppressWarnings("unchecked")
  @Benchmark
  boolean getIfPresent(int repetitions) {
    boolean retVal = false;
    for (int i = 0; i < repetitions; ++i) {
      retVal &= Enums.getIfPresent(enumType, sampleData[i & 255]).isPresent();
    }
    return retVal;
  }

  private enum SmallEnum {
    X0,
    X1,
    X2
  }

  private enum MediumEnum {
    X0,
    X1,

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="11"
{!> ../../docs_src/path_params_numeric_validations/tutorial006.py!}
```

////

## Recap

With `Query`, `Path` (and others you haven't seen yet) you can declare metadata and string validations in the same ways as with [Query Parameters and String Validations](query-params-str-validations.md){.internal-link target=_blank}.

		}
		resMap[user] = blankEntities
	}

	var r []madmin.UserPolicyEntities
	cache.iamUserPolicyMap.Range(func(user string, mappedPolicy MappedPolicy) bool {
		if userPredicate != nil && !userPredicate(user) {
			return true
		}

		entitiesWithMemberOf, ok := resMap[user]
		if !ok {
			if len(userMap) > 0 {
				return true
			}

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="30-32"
{!> ../../docs_src/security/tutorial002.py!}
```

////

## Recap

You can now get the current user directly in your *path operation function*.

We are already halfway there.

We just need to add a *path operation* for the user/client to actually send the `username` and `password`.

```
X-Token: foo
X-Token: bar
```

The response would be like:

```JSON
{
    "X-Token values": [
        "bar",
        "foo"
    ]
}
```

## Recap

Declare headers with `Header`, using the same common pattern as `Query`, `Path` and `Cookie`.

/// tip

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="11  18"
{!> ../../docs_src/request_files/tutorial003.py!}
```

////

## Recap

But if you need to access variables and objects from the same **FastAPI** app, or you need to perform small background tasks (like sending an email notification), you can simply just use `BackgroundTasks`.

## Recap

I'll show you how to **build your own image from scratch** to run a single Uvicorn process. It is a simple process and is probably what you would want to do when using a distributed container management system like **Kubernetes**.

## Recap

You can use multiple worker processes with the `--workers` CLI option with the `fastapi` or `uvicorn` commands to take advantage of **multi-core CPUs**, to run **multiple processes in parallel**.

//                    "[\\PIPE\\netdfs]", auth);
//        try {
//            rpc = new MsrpcDfsRootEnum(domainName);
//            handle.sendrecv(rpc);
//            if (rpc.retval != 0)
//                throw new SmbException(rpc.retval, true);
//            return rpc.getEntries();
//        } finally {
//            try {
//                handle.close();
//            } catch(IOException ioe) {