### Cluster-writeable probe

The reply is '200 OK' if cluster has write quorum if not it returns '503 Service Unavailable'.

```
curl http://minio1:9001/minio/health/cluster
HTTP/1.1 503 Service Unavailable
Accept-Ranges: bytes
Content-Length: 0
Server: MinIO
Vary: Origin
X-Amz-Bucket-Region: us-east-1
X-Minio-Write-Quorum: 3
X-Amz-Request-Id: 16239D6AB80EBECF
X-Xss-Protection: 1; mode=block

    request.addHeader("Accept", "text/plain")

    @Suppress("DEPRECATION")
    httpClient.execute(request).use { response ->
      assertThat(response.code).isEqualTo(200)
      assertThat(EntityUtils.toString(response.entity)).isEqualTo("hello, Apache HttpClient 5.x")
    }

    val recorded = server.takeRequest()
    assertThat(recorded.headers["Accept"]).isEqualTo("text/plain")
    assertThat(

  fun missingConnectionHeader() {
    webServer.enqueue(
      MockResponse
        .Builder()
        .code(101)
        .setHeader("Upgrade", "websocket")
        .setHeader("Sec-WebSocket-Accept", "ujmZX4KXZqjwy6vi1aQFH5p4Ygk=")
        .build(),
    )
    webServer.enqueue(
      MockResponse
        .Builder()
        .onRequestStart(CloseSocket())
        .build(),
    )

     * as the specified wildcard and attributes are passed to the server for
     * filtering there (although attributes are largely ignored by servers
     * they are filtered locally by the default accept method).
     *
     * @param wildcard the wildcard pattern for matching file names (e.g., "*.txt")
     * @param attributes the DOS file attributes to match (e.g., ATTR_DIRECTORY)
     */

    private void runServer() {
        while (running.get() && !serverSocket.isClosed()) {
            try {
                Socket clientSocket = serverSocket.accept();
                // In a real implementation, this would handle RPC requests
                // For the mock, we just accept connections and close them
                clientSocket.close();
            } catch (IOException e) {
                if (running.get()) {

    val request =
      Request
        .Builder()
        .url("https://api.github.com/repos/square/okhttp/issues")
        .header("User-Agent", "OkHttp Headers.java")
        .addHeader("Accept", "application/json; q=0.5")
        .addHeader("Accept", "application/vnd.github.v3+json")
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

        .url(url)
        .header("Accept-Language", "fr-CA")
        .header("Accept-Charset", "UTF-8")
        .header("Accept-Encoding", "identity")
        .build()
    val response1 = client.newCall(request).execute()
    assertThat(response1.body.string()).isEqualTo("A")
    val request1 =
      Request
        .Builder()
        .url(url)
        .header("Accept-Language", "fr-CA")

            final RequestProcessor processor = new RequestProcessor(encoding, threshold);
            processor.accept(con);
            try (final CurlResponse res = processor.getResponse()) {
                actionListener.accept(res);
            } catch (final IOException e) {
                exceptionListener.accept(e);
            }
        }, exceptionListener);
    }

    /**

  /** The HTTP {@code Accept} header field name. */
  public static final String ACCEPT = "Accept";

  /** The HTTP {@code Accept-Charset} header field name. */
  public static final String ACCEPT_CHARSET = "Accept-Charset";

  /** The HTTP {@code Accept-Encoding} header field name. */
  public static final String ACCEPT_ENCODING = "Accept-Encoding";

  /** The HTTP {@code Accept-Language} header field name. */

                executeCallbacks.add(callback);
            }
        }
        if (executeCallbacks.size() > 0) {
            try {
                executeCallbacks.stream().forEach(callback -> callback.accept(response));
            } catch (final Exception ignore) {}
        }
        latch.countDown();
    }

    /**
     * Rejects the deferred computation with the given throwable.
     * @param t The throwable.