`http://localhost:8080`, e seu JavaScript esteja tentando se comunicar com um backend rodando em `http://localhost` (como não especificamos uma porta, o navegador assumirá a porta padrão `80`).

Portanto, o navegador enviará uma requisição HTTP `OPTIONS` ao backend `:80`, e se o backend enviar os cabeçalhos apropriados autorizando a comunicação a partir dessa origem diferente (`http://localhost:8080`), então o navegador `:8080` permitirá que o JavaScript no frontend envie sua requisição para o backend...

            LOGGER.info(
                    "System property '" + Constants.MAVEN_LOGGER_DEFAULT_LOG_LEVEL + "' is already set to '" + current
                            + "' - ignoring system property and get log level from -X/-e/-q options, log level will be set to "
                            + value);
        }
    }

    @Override
    public void activate() {
        ILoggerFactory lf = LoggerFactory.getILoggerFactory();

curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzdata$DATA.tar.gz
tar xzf tzcode$CODE.tar.gz
tar xzf tzdata$DATA.tar.gz

# The PACKRATLIST and PACKRATDATA options are copied from Ubuntu:
# https://git.launchpad.net/ubuntu/+source/tzdata/tree/debian/rules?h=debian/sid
#
# You can see the description of these make variables in the tzdata Makefile:

But for this example, we'll use a very simple HTML document with some JavaScript, all inside a long string.

This, of course, is not optimal and you wouldn't use it for production.

In production you would have one of the options above.

But it's the simplest way to focus on the server-side of WebSockets and have a working example:

{* ../../docs_src/websockets/tutorial001_py39.py hl[2,6:38,41:43] *}

	o.Lifecycle = lc
	o.Versioning = vc
	o.Replication = replicationConfig{
		Config:  replCfg,
		remotes: tgts,
	}
	o.Retention = rcfg
}

// newMetacache constructs a new metacache from the options.
func (o listPathOptions) newMetacache() metacache {
	return metacache{
		id:          o.ID,
		bucket:      o.Bucket,
		root:        o.BaseDir,
		recursive:   o.Recursive,
		status:      scanStateStarted,

   * X-Download-Options}</a> header field name.
   *
   * <p>When the new X-Download-Options header is present with the value {@code noopen}, the user is
   * prevented from opening a file download directly; instead, they must first save the file
   * locally.
   *
   * @since 24.1
   */
  public static final String X_DOWNLOAD_OPTIONS = "X-Download-Options";

 */
@Named
@Singleton
@Deprecated(since = "4.0.0")
public class DefaultToolchainsWriter implements ToolchainsWriter {

    @Override
    public void write(Writer output, Map<String, Object> options, PersistedToolchains toolchains) throws IOException {
        Objects.requireNonNull(output, "output cannot be null");
        Objects.requireNonNull(toolchains, "toolchains cannot be null");

        try (Writer out = output) {

## MinIO Deployment on Kubernetes

There are multiple options to deploy MinIO on Kubernetes:

    }

    protected boolean validateConfiguration(EncryptContext context) {
        SecDispatcher.ValidationResponse response = secDispatcher.validateConfiguration();
        if (!response.isValid() || context.options().verbose().orElse(false)) {
            dumpResponse(context, "", response);
        }
        return response.isValid();
    }

## 단계

브라우저 내 `http://localhost:8080`에서 동작하는 프론트엔드가 있고, 자바스크립트는 `http://localhost`를 통해 백엔드와 통신한다고 가정해봅시다(포트를 명시하지 않는 경우, 브라우저는 `80` 을 기본 포트로 간주합니다).

그러면 브라우저는 백엔드에 HTTP `OPTIONS` 요청을 보내고, 백엔드에서 이 다른 출처(`http://localhost:8080`)와의 통신을 허가하는 적절한 헤더를 보내면, 브라우저는 프론트엔드의 자바스크립트가 백엔드에 요청을 보낼 수 있도록 합니다.

이를 위해, 백엔드는 "허용된 출처(allowed origins)" 목록을 가지고 있어야만 합니다.