code: // Licensed to the Software Freedom Conservancy (SFC) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The SFC licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  package org.openqa.selenium;
  
  import static java.nio.charset.StandardCharsets.US_ASCII;
  import static java.nio.charset.StandardCharsets.UTF_8;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.openqa.selenium.remote.CapabilityType.PROXY;
  import static org.openqa.selenium.testing.drivers.Browser.CHROME;
  import static org.openqa.selenium.testing.drivers.Browser.FIREFOX;
  import static org.openqa.selenium.testing.drivers.Browser.SAFARI;
  
  import com.google.common.base.Joiner;
  import com.google.common.net.HostAndPort;
  import io.netty.handler.codec.http.FullHttpResponse;
  import io.netty.handler.codec.http.HttpRequest;
  import java.net.URI;
  import java.net.URISyntaxException;
  import java.util.HashSet;
  import java.util.Set;
  import org.junit.jupiter.api.Test;
  import org.openqa.selenium.netty.server.SimpleHttpServer;
  import org.openqa.selenium.remote.http.HttpMethod;
  import org.openqa.selenium.testing.Ignore;
  import org.openqa.selenium.testing.JupiterTestBase;
  import org.openqa.selenium.testing.NoDriverAfterTest;
  import org.openqa.selenium.testing.NoDriverBeforeTest;
  
  class ProxySettingTest extends JupiterTestBase {
  
    @Test
    @Ignore(SAFARI)
    @NoDriverBeforeTest
    @NoDriverAfterTest
    public void canConfigureManualHttpProxy() throws URISyntaxException, InterruptedException {
      try (FakeProxyServer proxyServer = new FakeProxyServer()) {
        Proxy proxyToUse = proxyServer.asProxy();
  
        createNewDriver(new ImmutableCapabilities(PROXY, proxyToUse));
  
        driver.get(appServer.whereElseIs("simpleTest.html"));
        assertThat(proxyServer.hasBeenCalled("simpleTest.html")).isTrue();
      }
    }
  
    @Test
    @Ignore(SAFARI)
    @NoDriverBeforeTest
    @NoDriverAfterTest
    public void canConfigureNoProxy() throws URISyntaxException, InterruptedException {
      try (FakeProxyServer proxyServer = new FakeProxyServer()) {
        Proxy proxyToUse = proxyServer.asProxy();
        proxyToUse.setNoProxy("localhost, 127.0.0.1, " + appServer.getHostName());
  
        createNewDriver(new ImmutableCapabilities(PROXY, proxyToUse));
  
        driver.get(appServer.whereIs("simpleTest.html"));
        assertThat(proxyServer.hasBeenCalled("simpleTest.html")).isFalse();
  
        driver.get(appServer.whereElseIs("simpleTest.html"));
        assertThat(proxyServer.hasBeenCalled("simpleTest.html")).isTrue();
      }
    }
  
    @Test
    @Ignore(SAFARI)
    @NoDriverBeforeTest
    @NoDriverAfterTest
    public void canConfigureProxyThroughPACFile() throws URISyntaxException, InterruptedException {
      try (SimpleHttpServer helloServer =
              createSimpleHttpServer(
                  appServer.whereElseIs("mouseOver.html"),
                  "<!DOCTYPE html><title>Hello</title><h3>Hello, world!</h3>");
          SimpleHttpServer pacFileServer =
              createPacfileServer(
                  "/proxy.pac",
                  Joiner.on('\n')
                      .join(
                          "function FindProxyForURL(url, host) {",
                          "  return 'PROXY " + getHostAndPort(helloServer) + "';",
                          "}")); ) {
  
        Proxy proxy = new Proxy();
        proxy.setProxyAutoconfigUrl("http://" + getHostAndPort(pacFileServer) + "/proxy.pac");
  
        createNewDriver(new ImmutableCapabilities(PROXY, proxy));
  
        driver.get(appServer.whereElseIs("mouseOver.html"));
        assertThat(driver.findElement(By.tagName("h3")).getText()).isEqualTo("Hello, world!");
      }
    }
  
    @Test
    @Ignore(SAFARI)
    @NoDriverBeforeTest
    @NoDriverAfterTest
    @Ignore(value = FIREFOX, travis = true)
    @Ignore(value = CHROME, reason = "Flaky")
    public void canUsePACThatOnlyProxiesCertainHosts()
        throws URISyntaxException, InterruptedException {
      try (SimpleHttpServer helloServer =
              createSimpleHttpServer(
                  "/index.html", "<!DOCTYPE html><title>Hello</title><h3>Hello, world!</h3>");
          SimpleHttpServer goodbyeServer =
              createSimpleHttpServer(
                  helloServer.baseUri().resolve("/index.html").toString(),
                  "<!DOCTYPE html><title>Goodbye</title><h3>Goodbye, world!</h3>");
          SimpleHttpServer pacFileServer =
              createPacfileServer(
                  "/proxy.pac",
                  Joiner.on('\n')
                      .join(
                          "function FindProxyForURL(url, host) {",
                          "  if (url.indexOf('" + getHostAndPort(helloServer) + "') != -1) {",
                          "    return 'PROXY " + getHostAndPort(goodbyeServer) + "';",
                          "  }",
                          "  return 'DIRECT';",
                          "}")); ) {
  
        Proxy proxy = new Proxy();
        proxy.setProxyAutoconfigUrl("http://" + getHostAndPort(pacFileServer) + "/proxy.pac");
  
        createNewDriver(new ImmutableCapabilities(PROXY, proxy));
  
        driver.get("http://" + getHostAndPort(helloServer) + "/index.html");
        assertThat(driver.findElement(By.tagName("h3")).getText()).isEqualTo("Goodbye, world!");
  
        driver.get(appServer.whereElseIs("simpleTest.html"));
        assertThat(driver.findElement(By.tagName("h1")).getText()).isEqualTo("Heading");
      }
    }
  
    private SimpleHttpServer createSimpleHttpServer(String requestPath, String responseHtml)
        throws URISyntaxException, InterruptedException {
      SimpleHttpServer server = new SimpleHttpServer();
      byte[] bytes = responseHtml.getBytes(UTF_8);
  
      server.registerEndpoint(HttpMethod.GET, requestPath, "text/html; charset=utf-8", bytes);
  
      return server;
    }
  
    private SimpleHttpServer createPacfileServer(String requestPath, String responsePac)
        throws URISyntaxException, InterruptedException {
      SimpleHttpServer server = new SimpleHttpServer();
      byte[] bytes = responsePac.getBytes(US_ASCII);
  
      server.registerEndpoint(
          HttpMethod.GET, requestPath, "application/x-ns-proxy-autoconfig", bytes);
  
      return server;
    }
  
    private static HostAndPort getHostAndPort(SimpleHttpServer server) {
      URI baseUri = server.baseUri();
      return HostAndPort.fromParts(baseUri.getHost(), baseUri.getPort());
    }
  
    public static class FakeProxyServer extends SimpleHttpServer {
      private final Set<String> resources = new HashSet<>();
  
      public FakeProxyServer() throws URISyntaxException, InterruptedException {}
  
      @Override
      protected FullHttpResponse handleRequest(HttpRequest requested) {
        String[] parts = requested.uri().split("/");
  
        if (parts.length > 1) {
          resources.add(parts[parts.length - 1]);
        }
  
        return super.handleRequest(requested);
      }
  
      /**
       * Checks if a resource has been requested using the short name of the resource.
       *
       * @param resourceName The short name of the resource to check.
       * @return true if the resource has been called.
       */
      public boolean hasBeenCalled(String resourceName) {
        return resources.contains(resourceName);
      }
  
      public Proxy asProxy() {
        Proxy proxy = new Proxy();
        URI baseUri = baseUri();
        proxy.setHttpProxy(baseUri.getHost() + ":" + baseUri.getPort());
        return proxy;
      }
    }
  }
  