import org.lastaflute.web.util.LaRequestUtil;

/**
 * Utility class for web API operations.
 * Provides functionality for setting and retrieving objects from request attributes,
 * error handling, and validation in web API context.
 */
public final class WebApiUtil {

    /**
     * Request attribute key for storing web API exceptions.
     */
    private static final String WEB_API_EXCEPTION = "webApiException";

    /**

 *
 * <p>As this interface extends {@code java.util.function.Function}, an instance of this type can be
 * used as a {@code java.util.function.Function} directly. To use a {@code
 * java.util.function.Function} in a context where a {@code com.google.common.base.Function} is
 * needed, use {@code function::apply}.
 *
 * <p>This interface is now a legacy type. Use {@code java.util.function.Function} (or the

Here's how it might look:

<img src="/img/tutorial/debugging/image01.png">

---

If you use Pycharm, you can:

* Open the "Run" menu.
* Select the option "Debug...".
* Then a context menu shows up.
* Select the file to debug (in this case, `main.py`).

It will then start the server with your **FastAPI** code, stop at your breakpoints, etc.

Here's how it might look:

import jcifs.internal.smb2.persistent.HandleGuid;
import jcifs.internal.smb2.persistent.HandleType;
import jcifs.internal.smb2.persistent.Smb2HandleCapabilities;

/**
 * Test class for durable handle create context implementations
 */
public class DurableHandleContextTest {

    @Test
    public void testDurableHandleRequest() {
        DurableHandleRequest request = new DurableHandleRequest();

        .serialNumber(1L)
        .certificateAuthority(1)
        .commonName("root")
        .build()

    // Add a good intermediate CA, and have that issue a good certificate to localhost. Prepare an
    // SSL context for an HTTP client under attack. It includes the trusted CA and a pinned
    // certificate.
    val goodIntermediateCa =
      HeldCertificate
        .Builder()
        .signedBy(rootCa)

     * The path identified by the Java {@code --class-path} option.
     * Used for compilation, execution and Javadoc among others.
     * The Java tools location is {@link StandardLocation#CLASS_PATH}.
     *
     * <h4>Context-sensitive interpretation</h4>
     * A dependency with this path type will not necessarily be placed on the class path.
     * There are two circumstances where the dependency may nevertheless be placed somewhere else:
     *

            WebApiUtil.setError(400, "Test error");
            WebApiUtil.validate(); // Should not throw in test environment
        } catch (Exception e) {
            // This is expected behavior when no request context is available
        }
    }

    public void test_utilityClass_pattern() {
        // Verify utility class design pattern compliance

        // 1. Class should be final

    public static String getDomainByName(String name) throws UnknownHostException {
        DirContext context;
        UnknownHostException uhe = null;

        try {
            context = new InitialDirContext();
            for ( ;; ) {
                try {
                    Attributes attributes = context.getAttributes(
                        "dns:/_ldap._tcp.dc._msdcs." + name,

 * which is commonly used for Kerberos-based authentication in Windows environments.
 * It handles the negotiation between client and server to establish a secure
 * authentication context without requiring users to explicitly enter credentials.
 *
 * The authenticator supports various configuration options including delegation,
 * basic authentication fallback, and localhost authentication bypass.
 */

    }

    @Test
    @DisplayName("seq ctor: tag 3 with wrong tag class is rejected")
    void sequenceConstructor_ticketTag_wrongClass_throws() {
        // Arrange: minimal valid fields + tag 3 as CONTEXT-SPECIFIC instead of APPLICATION
        ASN1EncodableVector v = new ASN1EncodableVector();
        v.add(new DERTaggedObject(true, 0, new ASN1Integer(Integer.parseInt(KerberosConstants.KERBEROS_VERSION))));