Calls are executed in one of two ways:

 * **Synchronous:** your thread blocks until the response is readable.

import okhttp3.internal.connection.RoutePlanner.ConnectResult
import okhttp3.internal.connection.RoutePlanner.Plan
import okhttp3.internal.okHttpName

/**
 * Speculatively connects to each IP address of a target address, returning as soon as one of them
 * connects successfully. This kicks off new attempts every 250 ms until a connect succeeds.
 */
internal class FastFallbackExchangeFinder(

								Protocol:   corev1.ProtocolTCP,
							},
						},
					},
					Status: corev1.ServiceStatus{
						LoadBalancer: corev1.LoadBalancerStatus{Ingress: []corev1.LoadBalancerIngress{
							{
								IP: "2.2.2.2",
							},
						}},
					},
				},
				&corev1.Service{
					ObjectMeta: metav1.ObjectMeta{
						Name:      "ingress",
						Namespace: "istio-ingress",
						Labels: map[string]string{

                </mxCell>

	transport  *http.Transport
	httpClient *http.Client
	store      store.Store[event.Event]
	loggerOnce logger.LogOnce
	cancel     context.CancelFunc
	cancelCh   <-chan struct{}

	addr string // full address ip/dns with a port number, e.g.  x.x.x.x:8080
}

// ID - returns target ID.
func (target *WebhookTarget) ID() event.TargetID {
	return target.id
}

// Name - returns the Name of the target.

  // * must consist of lower case alphanumeric characters or '-'.
  // * must start and end with an alphanumeric character.
  // Default is empty string.
  optional string name = 1;

  // protocol represents the IP protocol for this port.
  // Must be UDP, TCP, or SCTP.
  // Default is TCP.
  optional string protocol = 2;

  // port represents the port number of the endpoint.

                </mxCell>

graph LR

browser("Browser")
proxy["Proxy on http://0.0.0.0:9999/api/v1/app"]
server["Server on http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

/// tip | "提示"

IP `0.0.0.0` 常用于指程序监听本机或服务器上的所有有效 IP。

///

API 文档还需要 OpenAPI 概图声明 API `server` 位于 `/api/v1`（使用代理时的 URL）。例如：

```JSON hl_lines="4-8"
{
    "openapi": "3.0.2",
    // More stuff here
    "servers": [
        {

                </mxCell>

        /* JCIFS will build a composite list of shares if the target host has
         * multiple IP addresses such as when domain-based DFS is in play. Because
         * of this, to ensure that we query each IP individually without re-resolving
         * the hostname and getting a different IP, we must use the current addresses
         * IP rather than just url.getHost() like we were using prior to 1.2.16.
         */