val request = Request.Builder()
            .url("https://publicobject.com/helloworld.txt")
            .build()

        client.newCall(request).execute().use { response ->
          if (!response.isSuccessful) throw IOException("Unexpected code $response")

          for ((name, value) in response.headers) {
            println("$name: $value")
          }

          println(response.body!!.string())
        }

        .url("https://api.imgur.com/3/image")
        .post(ProgressRequestBody(requestBody, progressListener))
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")
      println(response.body.string())
    }
  }

  private class ProgressRequestBody(
    private val delegate: RequestBody,

  override fun onResponse(
    call: Call,
    response: Response,
  ) {
    processResponse(response)
  }

  internal fun processResponse(response: Response) {
    response.use {
      if (!response.isSuccessful) {
        listener.onFailure(this, null, response)
        return
      }

      val body = response.body

      if (!body.isEventStream()) {
        listener.onFailure(
          this,

      .url("https://api.imgur.com/3/image")
      .post(new ProgressRequestBody(requestBody, progressListener))
      .build();

    Response response = client.newCall(request).execute();
    if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

    System.out.println(response.body().string());
  }

  public static void main(String... args) throws Exception {
    new UploadProgress().run();
  }

   *
   * This will release the connection if it is still held.
   *
   * It will also notify the listener that the call completed; either successfully or
   * unsuccessfully.
   *
   * If the call was canceled or timed out, this will wrap [e] in an exception that provides that
   * additional context. Otherwise [e] is returned as-is.
   */

     * @param toIndex          the destination index name
     * @param waitForCompletion whether to wait for the operation to complete
     * @return true if the copy operation was successful, false otherwise
     */
    public boolean copyDocIndex(final String fromIndex, final String toIndex, final boolean waitForCompletion) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();