*/
  object KeepOpen : SocketPolicy

  /**
   * Close the socket after the response. This is the default HTTP/1.0 behavior. For HTTP/2
   * connections, this sends a [GOAWAYframe](https://tools.ietf.org/html/rfc7540#section-6.8)
   * immediately after the response and will close the connection when the client's socket
   * is exhausted.
   *
   * See [SocketPolicy] for reasons why this can cause test flakiness and how to avoid it.
   */

   *
   * <p>The elements of the returned {@code Iterable} must each be:
   *
   * <ul>
   *   <li>Non-null
   *   <li>Usable as {@code Map} keys (see the Guava User Guide's section on <a
   *       href="https://github.com/google/guava/wiki/GraphsExplained#graph-elements-nodes-and-edges">
   *       graph elements</a> for details)
   * </ul>
   *

                                        + toString(present) + ". Add the conflicting managed dependency directly "
                                        + "to the dependencyManagement section of the POM."));
                    }
                }
            }

            return target.withDependencyManagement(depMgmt.withDependencies(dependencies.values()));
        }
        return target;
    }

<img src="/img/tutorial/body-fields/image01.png">

## 技术细节

关于 `example` 和 `examples`...

JSON Schema在最新的一个版本中定义了一个字段 <a href="https://json-schema.org/draft/2019-09/json-schema-validation.html#rfc.section.9.5" class="external-link" target="_blank">`examples`</a> ，但是 OpenAPI 基于之前的一个旧版JSON Schema，并没有 `examples`.

   *
   * <p>The elements of the returned {@code Iterable} must each be:
   *
   * <ul>
   *   <li>Non-null
   *   <li>Usable as {@code Map} keys (see the Guava User Guide's section on <a
   *       href="https://github.com/google/guava/wiki/GraphsExplained#graph-elements-nodes-and-edges">
   *       graph elements</a> for details)
   * </ul>
   *

Every time you "log in with" Facebook, Google, GitHub, Microsoft, Twitter, that application is using OAuth2 with scopes.

In this section you will see how to manage authentication and authorization with the same OAuth2 with scopes in your **FastAPI** application.

/// warning

This is a more or less advanced section. If you are just starting, you can skip it.

	if err != nil {
		return "", err
	}

	if cfg.ChainedCNIPlugin {
		if !file.Exists(cniConfigFilepath) {
			return "", fmt.Errorf("CNI config file %s removed during configuration", cniConfigFilepath)
		}
		// This section overwrites an existing plugins list entry for istio-cni
		existingCNIConfig, err := os.ReadFile(cniConfigFilepath)
		if err != nil {
			return "", err
		}
		pluginConfig, err = insertCNIConfig(pluginConfig, existingCNIConfig)

			return result, nil
		}
		result.SecretMeta = meta
		result.Valid = meta.Valid
		return result, nil
	}
	result.Valid = false
	return result, nil
}

// GetEnvoySecrets parses the secrets section of the config dump into []SecretItem
func GetEnvoySecrets(
	wrapper *configdump.Wrapper,
) ([]SecretItem, error) {
	secretConfigDump, err := wrapper.GetSecretConfigDump()
	if err != nil {
		return nil, err
	}

{!../../docs_src/bigger_applications/app/routers/items.py!}
```

#### How relative imports work

/// tip

If you know perfectly how imports work, continue to the next section below.

///

A single dot `.`, like in:

```Python
from .dependencies import get_token_header
```

would mean:

	if s3Error := checkRequestAuthType(ctx, r, policy.GetObjectAction, bucket, zipPath); s3Error != ErrNone {
		if getRequestAuthType(r) == authTypeAnonymous {
			// As per "Permission" section in
			// https://docs.aws.amazon.com/AmazonS3/latest/API/RESTObjectGET.html
			// If the object you request does not exist,
			// the error Amazon S3 returns depends on
			// whether you also have the s3:ListBucket