public fun headers(headers: Headers): Builder =
      apply {
        this.headers_ = headers.newBuilder()
      }

    /** Sets the trailers and returns this. */
    public fun trailers(trailers: Headers): Builder =
      apply {
        this.trailers_ = trailers.newBuilder()
      }

    /** Don't trust the client during the SSL handshake. */
    public fun failHandshake(): Builder =
      apply {

* Il intercepte chaque **requête** qui parvient à votre application.
* Il peut alors faire quelque chose avec cette **requête** ou exécuter tout code nécessaire.
* Ensuite, il transmet la **requête** pour qu’elle soit traitée par le reste de l’application (par un *chemin d'accès*).

Anis Eleuch <******@****.***> 1727197938 +0100

      .build()

  @Test
  fun trailersHttp1() {
    trailers(Protocol.HTTP_1_1)
  }

  @Test
  fun trailersHttp2() {
    trailers(Protocol.HTTP_2)
  }

  private fun trailers(protocol: Protocol) {
    enableProtocol(protocol)

    server.enqueue(
      MockResponse
        .Builder()
        .addHeader("h1", "v1")
        .trailers(headersOf("t1", "v2"))
        .body(protocol, "Hello")

     */
    fun responseBodyComplete(trailers: Headers) {
      if (state == STATE_CLOSED) return
      if (state != STATE_READING_RESPONSE_BODY) throw IllegalStateException("state: $state")

      detachTimeout(timeout)

      this@Http1ExchangeCodec.trailers = trailers
      state = STATE_CLOSED
      if (trailers.size > 0) {
        client?.cookieJar?.receiveHeaders(url, trailers)
      }
    }
  }

///

Nous pouvons également utiliser cette même approche pour accéder au corps de la requête dans un gestionnaire d'exceptions.

Il suffit de traiter la requête dans un bloc `try`/`except` :

{* ../../docs_src/custom_request_and_route/tutorial002_an_py310.py hl[14,16] *}

   * @throws IOException if the trailers cannot be loaded, such as if the network connection is
   *     dropped.
   */
  @Throws(IOException::class)
  fun trailers(): Headers = trailersSource.get()

  /**
   * Returns the trailers after the HTTP response, if they are available to read immediately. Unlike
   * [trailers], this doesn't block if the trailers are not immediately available, and instead

  @JvmName("-deprecated_getTrailers")
  @Deprecated(
    message = "moved to var",
    replaceWith = ReplaceWith(expression = "trailers"),
    level = DeprecationLevel.ERROR,
  )
  fun getTrailers(): Headers = trailers

  fun setTrailers(trailers: Headers) = apply { this.trailers = trailers }

  @JvmName("-deprecated_getSocketPolicy")
  @Deprecated(
    message = "moved to var",

    if (flushHeaders) {
      connection.flush()
    }
  }

  fun enqueueTrailers(trailers: Headers) {
    withLock {
      check(!sink.finished) { "already finished" }
      require(trailers.size != 0) { "trailers.size() == 0" }
      this.sink.trailers = trailers
    }
  }

  fun readTimeout(): Timeout = readTimeout

  fun writeTimeout(): Timeout = writeTimeout

  /**

        Crawler.Options options = new Crawler.Options();
        options.sessionId = "test-session";
        options.fileConfigIds = "file1";

        int result = crawler.doCrawl(options);
        assertEquals(Constants.EXIT_OK, result);
    }

    @Test
    public void test_doCrawl_withDataConfigIds() {
        Crawler.Options options = new Crawler.Options();