In OkHttp some fields of the address come from the URL (scheme, hostname, port) and the rest come from the [OkHttpClient](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-ok-http-client/).

### [Routes](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-route/)

import org.junit.jupiter.api.Test

class HeadersRequestTest {
  @Test fun readNameValueBlockDropsForbiddenHeadersHttp2() {
    val headerBlock =
      headersOf(
        ":status",
        "200 OK",
        ":version",
        "HTTP/1.1",
        "connection",
        "close",
      )
    val request = Request.Builder().url("http://square.com/").build()

      MockResponse.Builder()
        .status("HTP/1.1 200 OK")
        .build(),
    )
    executeSynchronously("/")
      .assertFailure("Unexpected status line: HTP/1.1 200 OK")
  }

  @Test
  fun serverSendsInvalidCodeTooLarge() {
    server.enqueue(
      MockResponse.Builder()
        .status("HTTP/1.1 2147483648 OK")
        .build(),
    )
    executeSynchronously("/")

     * Accept-Charset: UTF-8
     * HTTP/1.1 200 OK
     * 3
     * Content-Type: image/png
     * Content-Length: 100
     * Cache-Control: max-age=600
     * ```
     *
     * A typical HTTPS file looks like this:
     *
     * ```
     * https://google.com/foo
     * GET
     * 2
     * Accept-Language: fr-CA
     * Accept-Charset: UTF-8
     * HTTP/1.1 200 OK
     * 3
     * Content-Type: image/png

    assertFalse(requiresRequestBody("GET"))
  }

  @Test
  fun hasBody() {
    val request = Request.Builder().url("http://example.com").build()
    val response =
      Response.Builder().code(200)
        .message("OK")
        .request(request)
        .protocol(Protocol.HTTP_2)
        .build()
    assertTrue(hasBody(response))
  }

    assertThat(response2.code).isEqualTo(HttpURLConnection.HTTP_OK)
    assertThat(response2.message).isEqualTo("A-OK")
    val invalid = server.url("/invalid")
    val response3 = get(invalid)
    assertThat(response3.body.string()).isEqualTo("B")
    assertThat(response3.code).isEqualTo(HttpURLConnection.HTTP_OK)
    assertThat(response3.message).isEqualTo("B-OK")
    val response4 = get(invalid)

    return Response.Builder()
      .request(
        Request.Builder()
          .url("https://example.com/")
          .build(),
      )
      .protocol(Protocol.HTTP_1_1)
      .code(code)
      .message("OK")
      .body(responseBody)
      .apply { fn() }
      .build()
  }

        tunnelCodec.readResponseHeaders(false)!!
          .request(nextRequest)
          .build()
      tunnelCodec.skipConnectBody(response)

      when (response.code) {
        HttpURLConnection.HTTP_OK -> return null

        HttpURLConnection.HTTP_PROXY_AUTH -> {
          nextRequest = route.address.proxyAuthenticator.authenticate(route, response)
            ?: throw IOException("Failed to authenticate with proxy")

 * Fix: Cache SPDY responses even if the response body is closed prematurely.
 * Fix: Use strict timeouts when aborting a download.
 * Fix: Support Shoutcast HTTP responses like `ICY 200 OK`.
 * Fix: Don't unzip if there isn't a response body.
 * Fix: Don't leak gzip streams on redirects.
 * Fix: Don't do DNS lookups on invalid hosts.
 * Fix: Exhaust the underlying stream when reading gzip streams.

      .assertLogMatch(Regex("""requestHeadersEnd"""))
      .assertLogMatch(Regex("""responseHeadersStart"""))
      .assertLogMatch(Regex("""responseHeadersEnd: Response\{protocol=http/1\.1, code=200, message=OK, url=$url\}"""))
      .assertLogMatch(Regex("""responseBodyStart"""))
      .assertLogMatch(Regex("""responseBodyEnd: byteCount=6"""))
      .assertLogMatch(Regex("""connectionReleased"""))