}

  @Test
  fun invalidHost() {
    // Note that 1234.1.1.1 is an invalid host in a URI, but URL isn't as strict.
    client =
      client.newBuilder()
        .dns(FakeDns())
        .build()
    assertFailsWith<UnknownHostException> {
      getResponse(
        Request.Builder()
          .url("http://1234.1.1.1/index.html".toHttpUrl())
          .build(),
      )
    }

   * {@code Future}. If the input {@code Future} fails, the returned {@code Future} fails with the
   * same exception (and the function is not invoked).
   *
   * <p>More precisely, the returned {@code Future} takes its result from a {@code Future} produced
   * by applying the given {@code AsyncFunction} to the result of the original {@code Future}.
   * Example usage:
   *
   * <pre>{@code

     logos of any Contributor (except as may be necessary to comply with the
     notice requirements in Section 3.4).

2.4. Subsequent Licenses

     No Contributor makes additional grants as a result of Your choice to
     distribute the Covered Software under a subsequent version of this License
     (see Section 10.2) or under the terms of a Secondary License (if permitted

     or logos of any Contributor (except as may be necessary to comply with
     the notice requirements in Section 3.4).

2.4. Subsequent Licenses

     No Contributor makes additional grants as a result of Your choice to
     distribute the Covered Software under a subsequent version of this
     License (see Section 10.2) or under the terms of a Secondary License (if

Many Active Directory and other LDAP services are setup with [DNS SRV Records](https://ldap.com/dns-srv-records-for-ldap/) for high-availability of the directory service. To use this to find LDAP servers to connect to, an LDAP client makes a DNS SRV record request to the DNS service on a domain that looks like `_service._proto.example.com`. For LDAP the `proto` value is always `tcp`, and `service` is usually `ldap` or `ldaps`.

import javax.annotation.CheckForNull;

/**
 * A rate limiter. Conceptually, a rate limiter distributes permits at a configurable rate. Each
 * {@link #acquire()} blocks if necessary until a permit is available, and then takes it. Once
 * acquired, permits need not be released.
 *
 * <p>{@code RateLimiter} is safe for concurrent use: It will restrict the total rate of calls from
 * all threads. Note, however, that it does not guarantee fairness.
 *

So let's focus on the main cases, where it could crash entirely in some particular cases **in the future**, and it still makes sense to restart it.

///

          exception.addSuppressed(new FailedService(service));
        }
        throw exception;
      }
    }
  }

  /**
   * A {@link Service} that wraps another service and times how long it takes for it to start and
   * also calls the {@link ServiceManagerState#transitionService(Service, State, State)}, to record
   * the state transitions.
   */
  private static final class ServiceListener extends Service.Listener {

          exception.addSuppressed(new FailedService(service));
        }
        throw exception;
      }
    }
  }

  /**
   * A {@link Service} that wraps another service and times how long it takes for it to start and
   * also calls the {@link ServiceManagerState#transitionService(Service, State, State)}, to record
   * the state transitions.
   */
  private static final class ServiceListener extends Service.Listener {

Prefer to use the `Annotated` version if possible.

///

```Python hl_lines="8  49  56-57  60-61  70-76"
{!> ../../docs_src/security/tutorial004.py!}
```

////

/// note

If you check the new (fake) database `fake_users_db`, you will see how the hashed password looks like now: `"$2b$12$EixZaYVK1fsbw1ZfbX3OXePaWxn96p36WQoeG6Lruj3vjPGga31lW"`.

///

## Handle JWT tokens

Import the modules installed.