final RequestHeaderService requestHeaderService = ComponentUtil.getComponent(RequestHeaderService.class);
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        // HttpClient Parameters
        final Map<String, Object> paramMap = new HashMap<>();
        factory.setInitParameterMap(paramMap);

        final Map<String, String> clientConfigMap = getConfigParameterMap(ConfigName.CLIENT);

        if (StringUtil.isNotBlank(proxyHost) && StringUtil.isNotBlank(proxyPort)) {
            factoryParamMap.put(HcHttpClient.PROXY_HOST_PROPERTY, proxyHost);
            factoryParamMap.put(HcHttpClient.PROXY_PORT_PROPERTY, proxyPort);
            final String proxyUsername = paramMap.get(CRAWLER_WEB_PREFIX + "proxyUsername");

      )
    }
  }

  @Test fun testH2PriorKnowledgeOkHttpClientConstructionSuccess() {
    val okHttpClient =
      OkHttpClient
        .Builder()
        .protocols(listOf(Protocol.H2_PRIOR_KNOWLEDGE))
        .build()
    assertThat(okHttpClient.protocols.size).isEqualTo(1)
    assertThat(okHttpClient.protocols[0]).isEqualTo(Protocol.H2_PRIOR_KNOWLEDGE)
  }

  @Test fun nullDefaultProxySelector() {

    ```java
      private final OkHttpClient client = new OkHttpClient();

      public void run() throws Exception {
        Request request = new Request.Builder()
            .url("http://httpbin.org/delay/1") // This URL is served with a 1 second delay.
            .build();

        // Copy to customize OkHttp for this request.
        OkHttpClient client1 = client.newBuilder()

Backwards-Incompatible Changes
------------------------------

#### OkHttpClient final methods

`OkHttpClient` has 26 accessors like `interceptors()` and `writeTimeoutMillis()` that were non-final
in OkHttp 3.x and are final in 4.x. These were made non-final for use with mocking frameworks like
[Mockito][mockito]. We believe subtyping `OkHttpClient` is the wrong way to test with OkHttp. If

   *
   * Client configuration may be used to make follow-up decisions, such as:
   *
   *  * [OkHttpClient.followRedirects] must be true to follow redirects.
   *  * [OkHttpClient.followSslRedirects] must be true to follow redirects that add or remove HTTPS.
   *  * [OkHttpClient.authenticator] must respond to an authorization challenge.
   *

    builder = builder.addPart(MultipartBody.Part.create(requestBody))
    val multipartBody: MultipartBody = builder.build()
  }

  @Test
  fun okHttpClient() {
    val client: OkHttpClient = OkHttpClient()
    val dispatcher: Dispatcher = client.dispatcher
    val proxy: Proxy? = client.proxy
    val protocols: List<Protocol> = client.protocols

import okhttp3.testing.PlatformRule
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

class CallHandshakeTest {
  private lateinit var client: OkHttpClient

  @StartStop
  private val server = MockWebServer()

  @RegisterExtension
  @JvmField
  val clientTestRule = OkHttpClientTestRule()

  @RegisterExtension
  @JvmField
  var platform = PlatformRule()

    } finally {
      cache.delete()
    }
  }

  private fun OkHttpClient.get(url: String) {
    val request = Request.Builder().url(url).build()
    val response = this.newCall(request).execute()

    response.use {
      assertEquals(200, response.code)
    }
  }

  fun buildCloudflareIp(bootstrapClient: OkHttpClient): DnsOverHttps =
    DnsOverHttps
      .Builder()

import okio.GzipSource

/**
 * An OkHttp interceptor which logs request and response information. Can be applied as an
 * [application interceptor][OkHttpClient.interceptors] or as a [OkHttpClient.networkInterceptors].
 *
 * The format of the logs created by this class should not be considered stable and may
 * change slightly between releases. If you need a stable logging format, use your own interceptor.
 */
class HttpLoggingInterceptor
  @JvmOverloads