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 will use the `response_model` parameter (that includes dataclasses) to convert the response.

# Advanced Middleware { #advanced-middleware }

In the main tutorial you read how to add [Custom Middleware](../tutorial/middleware.md){.internal-link target=_blank} to your application.

And then you also read how to handle [CORS with the `CORSMiddleware`](../tutorial/cors.md){.internal-link target=_blank}.

In this section we'll see how to use other middlewares.

## Adding ASGI middlewares { #adding-asgi-middlewares }

package jcifs.internal.fscc;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;

import java.nio.charset.StandardCharsets;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

import jcifs.internal.SMBProtocolDecodingException;

package cmd

import (
	"bytes"
	"encoding/hex"
	"errors"
	"fmt"
	"hash"
	"io"

	"github.com/minio/highwayhash"
	"github.com/minio/minio/internal/hash/sha256"
	"golang.org/x/crypto/blake2b"

	xioutil "github.com/minio/minio/internal/ioutil"
	"github.com/minio/minio/internal/logger"
)

// magic HH-256 key as HH-256 hash of the first 100 decimals of π as utf-8 string with a zero key.

package cmd

//go:generate msgp -file=$GOFILE -unexported

import (
	"context"
	"fmt"
	"strconv"
	"sync"
	"sync/atomic"
	"time"

	"github.com/minio/minio/internal/dsync"
)

// Reject new lock requests immediately when this many are queued
// for the local lock mutex.
// We do not block unlocking or maintenance, but they add to the count.

 * limitations under the License.
 */
package okhttp3.internal.duplex

import java.io.IOException
import java.util.concurrent.CountDownLatch
import java.util.concurrent.FutureTask
import java.util.concurrent.LinkedBlockingQueue
import java.util.concurrent.TimeUnit
import mockwebserver3.SocketHandler
import okhttp3.internal.connection.BufferedSocket
import okhttp3.internal.connection.asBufferedSocket
import okio.Socket

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 */
package jcifs.internal.smb2.persistent;

import java.util.Arrays;

import jcifs.internal.smb2.create.CreateContextRequest;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Durable Handle Reconnect Create Context (DHnC)
 *
 * MS-SMB2 Section 2.2.13.2.5
 */

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.internal.smb1.trans.nt;

import java.io.IOException;

import jcifs.Decodable;
import jcifs.FileNotifyInformation;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;
import jcifs.util.Hexdump;
import jcifs.util.Strings;

/**
 * File notification information
 *
 *

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.internal.smb1.trans.nt;

import java.io.IOException;

import jcifs.Configuration;
import jcifs.RuntimeCIFSException;
import jcifs.internal.dtyp.SecurityDescriptor;
import jcifs.internal.util.SMBUtil;

/**
 * Response for SMB1 NT Transaction security descriptor query.
 *

import java.io.IOException
import java.io.InputStream
import java.io.InputStreamReader
import java.io.Reader
import java.nio.charset.Charset
import okhttp3.internal.charsetOrUtf8
import okhttp3.internal.chooseCharset
import okhttp3.internal.closeQuietly
import okhttp3.internal.readBomAsCharset
import okio.Buffer
import okio.BufferedSource
import okio.ByteString
import okio.use

/**