* connection the client has many options:
 *
 *  * **HTTP proxy:** a proxy server may be explicitly configured for the client. Otherwise, the
 *    [proxy selector][java.net.ProxySelector] is used. It may return multiple proxies to attempt.
 *  * **IP address:** whether connecting directly to an origin server or a proxy, opening a socket

  @Test
  fun connectTimeoutsAttemptsAlternateRoute() {
    val proxySelector = RecordingProxySelector()
    proxySelector.proxies.add(Proxy(Proxy.Type.HTTP, TestUtil.UNREACHABLE_ADDRESS_IPV4))
    proxySelector.proxies.add(server.toProxyAddress())
    server.enqueue(MockResponse(body = "success!"))
    client =
      client.newBuilder()
        .proxySelector(proxySelector)
        .readTimeout(Duration.ofMillis(100))

	public final fun protocols ()Ljava/util/List;
	public final fun proxy ()Ljava/net/Proxy;
	public final fun proxyAuthenticator ()Lokhttp3/Authenticator;
	public final fun proxySelector ()Ljava/net/ProxySelector;
	public final fun socketFactory ()Ljavax/net/SocketFactory;
	public final fun sslSocketFactory ()Ljavax/net/ssl/SSLSocketFactory;
	public fun toString ()Ljava/lang/String;

import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.repository.AuthenticationContext;
import org.eclipse.aether.repository.AuthenticationSelector;
import org.eclipse.aether.repository.ProxySelector;
import org.eclipse.aether.repository.RemoteRepository;

/**
 * @since 3.2.3
 */
@Named("default")
@Singleton
public class MavenRepositorySystem {

    if (existingRouteSelection != null && existingRouteSelection.hasNext()) {
      return planConnectToRoute(existingRouteSelection.next())
    }

    // Decide which proxy to use, if any. This may block in ProxySelector.select().
    var newRouteSelector = routeSelector
    if (newRouteSelector == null) {
      newRouteSelector =
        RouteSelector(
          address = address,
          routeDatabase = routeDatabase,

import org.eclipse.aether.RepositorySystemSession;
import org.eclipse.aether.repository.AuthenticationContext;
import org.eclipse.aether.repository.AuthenticationSelector;
import org.eclipse.aether.repository.ProxySelector;
import org.eclipse.aether.repository.RemoteRepository;

/**
 */
@Named("default")
@Singleton
@Deprecated
public class LegacyRepositorySystem implements RepositorySystem {

    @Inject

    server.enqueue(
      MockResponse(body = "response 1"),
    )
    server.enqueue(
      MockResponse(code = 407),
    )
    client =
      client.newBuilder()
        .proxySelector(
          object : ProxySelector() {
            override fun select(uri: URI): List<Proxy> = listOf(server.toProxyAddress())

            override fun connectFailed(
              uri: URI,

  ) {
    // Tell the proxy selector when we fail to connect on a fresh connection.
    if (failedRoute.proxy.type() != Proxy.Type.DIRECT) {
      val address = failedRoute.address
      address.proxySelector.connectFailed(
        address.url.toUri(),
        failedRoute.proxy.address(),
        failure,
      )
    }

    client.routeDatabase.failed(failedRoute)
  }

  /**

    certain bad routes indefinitely; now we only track the ones that could be necessary.
 *  Fix: Defer proxy selection until a proxy is required. This saves calls to `ProxySelector` on
    calls that use a pooled connection.


## Version 4.3.1

_2020-01-07_

 *  Fix: Don't crash with a `NullPointerException` when a web socket is closed before it connects.

    behavior was surprising because OkHttp was disregarding the user's specified configuration. If
    you need to customize proxy fallback behavior, implement your own `java.net.ProxySelector`.

 *  Fix: Support TLSv1.3 on devices that support it.

 *  Fix: Share pooled connections across equivalent `OkHttpClient` instances. Previous releases had