* `expose_headers` - Indicate any response headers that should be made accessible to the browser. Defaults to `[]`.
* `max_age` - Sets a maximum time in seconds for browsers to cache CORS responses. Defaults to `600`.

The middleware responds to two particular types of HTTP request...

### CORS preflight requests

These are any `OPTIONS` request with `Origin` and `Access-Control-Request-Method` headers.

	mux.Handle("/ui/", http.StripPrefix("/ui", handler))
	mux.Handle("/", redirectWithQuery("/ui", http.StatusTemporaryRedirect))
	s := &http.Server{Handler: mux}
	return s.Serve(ln)
}

// redirectWithQuery responds with a given redirect code, preserving query
// parameters in the redirect URL. It does not convert relative paths to
// absolute paths like http.Redirect does, so that HTTPServerArgs.Handlers can

		constants.StreamProtocolV5Name: {
			Binary:   true,
			Channels: channels,
		},
	})
	conn.SetIdleTimeout(defaultIdleConnectionTimeout)
	// Opening the connection responds to WebSocket client, negotiating
	// the WebSocket upgrade connection and the subprotocol.
	_, streams, err := conn.Open(w, req)
	if err != nil {
		return nil, err
	}

	Watcher() Watcher
	// Initialize checks the first request.
	Initialize(node *core.Node) error
	// Close discards the connection.
	Close()
	// Process responds to a discovery request.
	Process(req *discovery.DiscoveryRequest) error
	// Push responds to a push event queue
	Push(ev any) error
}

func Stream(ctx ConnectionContext) error {
	con := ctx.XdsConnection()

### Não faça perguntas no chat

Tenha em mente que os chats permitem uma "conversa mais livre", dessa forma é muito fácil fazer perguntas que são muito genéricas e dificeís de responder, assim você pode acabar não sendo respondido.

// WithTimeout returns an http.Handler that runs h with a timeout
// determined by timeoutFunc. The new http.Handler calls h.ServeHTTP to handle
// each request, but if a call runs for longer than its time limit, the
// handler responds with a 504 Gateway Timeout error and the message
// provided. (If msg is empty, a suitable default message will be sent.) After
// the handler times out, writes by h to its http.ResponseWriter will return

	// on the wire, but not using TCP.  Use a Transport with a
	// custom dialer that returns a fake net.Conn that waits
	// for the full input (and recording it), and then responds
	// with a dummy response.
	var buf bytes.Buffer // records the output
	pr, pw := io.Pipe()
	defer pr.Close()
	defer pw.Close()
	dr := &delegateReader{c: make(chan io.Reader)}

	t := &http.Transport{

* The frontend (running in the user's browser) sends that `username` and `password` to a specific URL in our API (declared with `tokenUrl="token"`).
* The API checks that `username` and `password`, and responds with a "token" (we haven't implemented any of this yet).
    * A "token" is just a string with some content that we can use later to verify this user.
    * Normally, a token is set to expire after some time.

			logger.LogOnceIf(ctx, logSubsys, err, c.url.Host)
			c.MarkOffline(err)
		}
		defer xhttp.DrainBody(resp.Body)
		// Limit the ReadAll(), just in case, because of a bug, the server responds with large data.
		b, err := io.ReadAll(io.LimitReader(resp.Body, c.MaxErrResponseSize))
		if err != nil {
			if xnet.IsNetworkOrHostDown(err, expectTimeouts) {
				if !c.NoMetrics {

			}
			if authenticated {
				t.Errorf("%s: incorrectly authenticated token", tt.test)
			}
		}()
	}
}

// recorderV1beta1Service records all token review requests, and responds with the
// provided TokenReviewStatus.
type recorderV1beta1Service struct {
	lastRequest authenticationv1beta1.TokenReview
	response    authenticationv1beta1.TokenReviewStatus
}