**FastAPI**는 요청에서 받은 **헤더**에서 **각 필드**에 대한 데이터를 **추출**하고 정의한 Pydantic 모델을 줍니다.

## 문서 확인하기 { #check-the-docs }

문서 UI `/docs`에서 필요한 헤더를 볼 수 있습니다:

<div class="screenshot">
<img src="/img/tutorial/header-param-models/image01.png">
</div>

## 추가 헤더 금지하기 { #forbid-extra-headers }

일부 특별한 사용 사례(흔하지는 않겠지만)에서는 수신하려는 헤더를 **제한**할 수 있습니다.

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

查看 `/docs` 时，你会看到字段 `data` 期望接收 base64 编码的字节：

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

你可以发送如下请求：

```json
{
    "description": "Some data",
    "data": "aGVsbG8="
}
```

/// tip | 提示

        StringBuilder buf = new StringBuilder();
        Exception cause = new IllegalArgumentException("Root cause");
        Exception exception = new RuntimeException("Wrapper exception", cause);

        monitorTarget.appendException(buf, exception);
        assertTrue(buf.toString().contains("Wrapper exception"));
        assertTrue(buf.toString().contains("Root cause"));
        assertTrue(buf.toString().contains("IllegalArgumentException"));

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.math.BigInteger;
import org.jspecify.annotations.Nullable;

/**
 * A wrapper class for unsigned {@code long} values, supporting arithmetic operations.
 *
 * <p>In some cases, when speed is more important than code readability, it may be faster simply to
 * treat primitive {@code long} values as unsigned, using the methods from {@link UnsignedLongs}.
 *

 *
 * <p>For serialization to work, the subclass must specify explicit {@code readObject} and {@code
 * writeObject} methods.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
abstract class AbstractMapBasedMultiset<E extends @Nullable Object> extends AbstractMultiset<E>
    implements Serializable {
  // TODO(lowasser): consider overhauling this back to Map<E, Integer>
  private transient Map<E, Count> backingMap;

 * on such a set can be performed efficiently, but others (such as {@link Set#hashCode} or {@link
 * Collections#frequency}) can cause major performance problems.
 *
 * @author Gregory Kick
 * @since 10.0
 */
@GwtCompatible
@SuppressWarnings("rawtypes") // allow ungenerified Comparable types
public abstract class ContiguousSet<C extends Comparable> extends ImmutableSortedSet<C> {
  /**

 */
public class NtlmHttpFilter implements Filter {

    /**
     * Default constructor.
     */
    public NtlmHttpFilter() {
        // Default constructor
    }

    private static final Logger logger = LoggerFactory.getLogger(NtlmHttpFilter.class);

    private static LogStream log = LogStream.getInstance();

 * Client implementation for the SMB Witness RPC protocol (MS-SWN).
 * Provides communication with witness servers for monitoring SMB resource availability.
 */
public class WitnessRpcClient implements AutoCloseable {
    private static final Logger log = LoggerFactory.getLogger(WitnessRpcClient.class);

    private final InetAddress serverAddress;
    private final CIFSContext context;
    private volatile boolean connected = false;

    public String getAlgorithmName(int algorithm) {
        switch (algorithm) {
        case COMPRESSION_NONE:
            return "None";
        case COMPRESSION_LZ77:
            return "LZ77";
        case COMPRESSION_LZ77_HUFFMAN:
            return "LZ77+Huffman";
        case COMPRESSION_LZNT1:
            return "LZNT1";
        case COMPRESSION_PATTERN_V1:
            return "Pattern_V1";
        default:

import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;

/**
 * Cache entry for directory contents with thread-safe operations
 */
public class DirectoryCacheEntry {

    private final String directoryPath;
    private final Smb2LeaseKey leaseKey;
    private final long createTime;
    private volatile long lastUpdateTime;
    private volatile long lastAccessTime;