</div>
                            <div class="card-body">
                                <div>
                                    <la:info id="msg" message="true">
                                        <div class="alert alert-info">${msg}</div>
                                    </la:info>
                                    <la:errors property="_global"/>

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
                "HTTPValidationError": {

                            "items": {
                                "anyOf": [{"type": "string"}, {"type": "integer"}]
                            },
                        },
                        "msg": {"title": "Message", "type": "string"},
                        "type": {"title": "Error Type", "type": "string"},
                    },
                },
                "HTTPValidationError": {

        .url("$scheme://$authority/")
        .headers(request.headers)
        .build()
    val fancyResponse =
      Response.Builder()
        .code(webSocketResponse.code)
        .message(webSocketResponse.message)
        .headers(webSocketResponse.headers)
        .request(fancyRequest)
        .protocol(Protocol.HTTP_1_1)
        .build()

    val connectionClose = CountDownLatch(1)
    val streams =

    executor.execute {
      try {
        readAndWriteFrames()
      } catch (e: IOException) {
        ******@****.***uietly()
        logger.info("${this@MockHttp2Peer} done: ${e.message}")
      }
    }
  }

  private fun readAndWriteFrames() {
    check(socket == null)
    val socket = serverSocket!!.accept()!!
    this.socket = socket

To try it out:

* Open the app with several browser tabs.
* Write messages from them.
* Then close one of the tabs.

That will raise the `WebSocketDisconnect` exception, and all the other clients will receive a message like:

```
Client #1596980209979 left the chat
```

/// tip

The app above is a minimal and simple example to demonstrate how to handle and broadcast messages to several WebSocket connections.

    source1.close() // Not exhausted!
    assertThat(relay1.isClosed).isTrue()
    assertFailsWith<IOException> {
      read(file)
    }.also { expected ->
      assertThat(expected.message).isEqualTo("unreadable cache file")
    }
    assertFile(Relay.PREFIX_DIRTY, -1L, -1, null, null)
  }

  @Test
  fun redundantCallsToCloseAreIgnored() {
    val upstream = Buffer()

    String message =
        String.format(
            Locale.ROOT,
            "Error in automated %s of %s\n"
                + "If the class is better tested explicitly, you can add %s() to %sTest",
            description,
            cls,
            explicitTestNames.get(0),
            cls.getName());
    return new AssertionError(message, e);
  }

  /**

      // fail(), but with the JUnit-supplied message.
      assertEquals("Using seed " + seed, expected, actual);
    }
  }

  private static void assertEqualsUsingStartedWith(
      Collection<?> startedWith, @Nullable Object expected, @Nullable Object actual) {
    if (!equal(actual, expected)) {
      // fail(), but with the JUnit-supplied message.
      assertEquals("Started with " + startedWith, expected, actual);

	if errors.Is(err, kes.ErrNotAllowed) || errors.Is(err, errors.ErrUnsupported) {
		return // If we don't have permission to compute the HMAC, don't change the cred.
	}
	if err != nil {
		logger.Fatal(err, "Unable to generate root access key using KMS")
	}

	sKey, err := GlobalKMS.MAC(GlobalContext, &kms.MACRequest{Message: []byte("root secret key")})