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.grid.server;
  
  import com.google.common.collect.ImmutableList;
  import com.google.common.collect.ImmutableSet;
  import java.util.List;
  import java.util.Optional;
  import java.util.Set;
  import org.openqa.selenium.grid.config.Config;
  import org.openqa.selenium.grid.web.CheckContentTypeHeader;
  import org.openqa.selenium.grid.web.CheckOriginHeader;
  import org.openqa.selenium.grid.web.EnsureSpecCompliantResponseHeaders;
  import org.openqa.selenium.internal.Require;
  import org.openqa.selenium.remote.http.Filter;
  import org.openqa.selenium.remote.http.HttpClient;
  import org.openqa.selenium.remote.tracing.TracedHttpClient;
  import org.openqa.selenium.remote.tracing.Tracer;
  
  public class NetworkOptions {
  
    private static final String NETWORK_SECTION = "network";
  
    private final Config config;
    // These are commonly used by process which can't set various headers.
    private final Set<String> SKIP_CHECKS_ON = ImmutableSet.of("/status", "/readyz");
  
    public NetworkOptions(Config config) {
      this.config = Require.nonNull("Config", config);
    }
  
    public HttpClient.Factory getHttpClientFactory(Tracer tracer) {
      return new TracedHttpClient.Factory(tracer, HttpClient.Factory.createDefault());
    }
  
    public Filter getSpecComplianceChecks() {
      // Base case: we do nothing
      Filter toReturn = httpHandler -> httpHandler;
  
      toReturn = toReturn.andThen(new EnsureSpecCompliantResponseHeaders());
  
      if (config.getBool(NETWORK_SECTION, "relax-checks").orElse(false)) {
        return toReturn;
      }
  
      if (config.getBool(NETWORK_SECTION, "check_content_type").orElse(true)) {
        toReturn = toReturn.andThen(new CheckContentTypeHeader(SKIP_CHECKS_ON));
      }
  
      boolean checkOrigin = config.getBool(NETWORK_SECTION, "check_origin_header").orElse(true);
      Optional<List<String>> allowedOrigins = config.getAll(NETWORK_SECTION, "allowed_origins");
  
      if (checkOrigin || allowedOrigins.isPresent()) {
        toReturn =
            toReturn.andThen(
                new CheckOriginHeader(allowedOrigins.orElse(ImmutableList.of()), SKIP_CHECKS_ON));
      }
  
      return toReturn;
    }
  }
  