*    [proxy selector][java.net.ProxySelector] is used. It may return multiple proxies to attempt.
 *  * **IP address:** whether connecting directly to an origin server or a proxy, opening a socket
 *    requires an IP address. The DNS server may return multiple IP addresses to attempt.
 *
 * Each route is a specific selection of these options.
 */
class Route(
  @get:JvmName("address") val address: Address,
  /**

{* ../../docs_src/cookie_param_models/tutorial001_an_py310.py hl[9:12,16] *}

**FastAPI** will **extract** the data for **each field** from the **cookies** received in the request and give you the Pydantic model you defined.

## Check the Docs { #check-the-docs }

You can see the defined cookies in the docs UI at `/docs`:

<div class="screenshot">

  @Override
  public Set<Feature<? super Collection>> getImpliedFeatures() {
    return implied;
  }

  @Retention(RetentionPolicy.RUNTIME)
  @Inherited
  @TesterAnnotation
  public @interface Require {
    CollectionFeature[] value() default {};

    CollectionFeature[] absent() default {};
  }

	cancel    context.CancelCauseFunc

	// Requests sent to the server.
	// If the handler is defined with 0 incoming capacity this will be nil.
	// Channel *must* be closed to signal the end of the stream.
	// If the request context is canceled, the stream will no longer process requests.
	// Requests sent cannot be used any further by the called.
	Requests chan<- []byte

	muxID uint64
	ctx   context.Context
}

        @DisplayName("Should be usable as both request and response")
        void testDualInterfaceUsage() {
            PreauthIntegrityNegotiateContext context = new PreauthIntegrityNegotiateContext();

            NegotiateContextRequest request = context;
            NegotiateContextResponse response = context;

            assertEquals(PreauthIntegrityNegotiateContext.NEGO_CTX_PREAUTH_TYPE, request.getContextType());

		if err != nil {
			err = msgp.WrapError(err, zb0003)
			return
		}
	}
	return
}

// MarshalMsg implements msgp.Marshaler
func (z BatchJobPrefix) MarshalMsg(b []byte) (o []byte, err error) {
	o = msgp.Require(b, z.Msgsize())
	o = msgp.AppendArrayHeader(o, uint32(len(z)))
	for zb0003 := range z {
		o = msgp.AppendString(o, z[zb0003])
	}
	return
}

// UnmarshalMsg implements msgp.Unmarshaler

    }

    /**
     * Converts child URLs using the URL convert helper.
     *
     * @param requestDataList the list of request data to convert
     * @return the converted list of request data
     */
    protected List<RequestData> convertChildUrlList(final List<RequestData> requestDataList) {
        try {

		err = msgp.WrapError(err, "LastUpdate")
		return
	}
	return
}

// MarshalMsg implements msgp.Marshaler
func (z *BucketReplicationResyncStatus) MarshalMsg(b []byte) (o []byte, err error) {
	o = msgp.Require(b, z.Msgsize())
	// map header, size 4
	// string "v"
	o = append(o, 0x84, 0xa1, 0x76)
	o = msgp.AppendInt(o, z.Version)
	// string "brs"
	o = append(o, 0xa3, 0x62, 0x72, 0x73)

6. Run tests (`mvn test`)
7. Open Pull Request

---

## Common Development Tasks

### Adding a Protocol Client

1. **Implement `CrawlerClient`**:
```java
public class MyClient extends AbstractCrawlerClient {
    @Override
    public ResponseData execute(RequestData request) { /* ... */ }

    @Override
    public void close() { /* cleanup */ }
}

            saveInfo(messages -> messages.addSuccessDeleteDocFromIndex(GLOBAL));
        } catch (final Exception e) {
            logger.warn("Failed to process a request.", e);
            throwValidationErrorApi(messages -> messages.addErrorsFailedToDeleteDocInAdmin(GLOBAL));
        }
        return asJson(new ApiResponse().status(Status.OK).result());
    }

    /**