}

    /**
     * Executes a HEAD request for the given URL.
     * @param url The URL to request.
     * @return The ResponseData.
     */
    @Override
    public ResponseData doHead(final String url) {
        try {
            final ResponseData responseData = processRequest(url, false);
            responseData.setMethod(Constants.HEAD_METHOD);
            return responseData;

        this.charset = charset;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.robot.client.S2RobotClient#doHead(java.lang.String)
     */
    @Override
    public ResponseData doHead(final String url) {
        try {
            final ResponseData responseData = processRequest(url, false);
            responseData.setMethod(Constants.HEAD_METHOD);

    }

    /**
     * Executes a HEAD request for the given URL.
     * @param url The URL to request.
     * @return The ResponseData.
     */
    @Override
    public ResponseData doHead(final String url) {
        try {
            final ResponseData responseData = processRequest(url, false);
            responseData.setMethod(Constants.HEAD_METHOD);
            return responseData;

        }
        return doHttpMethod(url, httpGet);
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.http.HttpClient#doHead(java.lang.String)
     */
    @Override
    public ResponseData doHead(final String url) {
        HttpUriRequest httpHead;
        try {
            httpHead = new HttpHead(url);
        } catch (final IllegalArgumentException e) {

     */
    @Nonnull
    public static XmlNode read(InputStream input, @Nullable InputLocationBuilder locationBuilder)
            throws XMLStreamException {
        return getService().doRead(input, locationBuilder);
    }

    /**
     * Reads an XML node from a reader.
     */
    @Nonnull
    public static XmlNode read(Reader reader) throws XMLStreamException {

                            return -1;
                        }
                        int toRead = Math.min(buffer.length, remaining);
                        System.arraycopy(includeContent, index[0], buffer, 0, toRead);
                        index[0] += toRead;
                        return toRead;
                    });

				currentPartBytes := v - partOffset
				currentPartDareBytes := v - partDarePkgOffset
				if currentPartBytes < toRead {
					toRead -= currentPartBytes
					l += getEncSize(currentPartDareBytes)
				} else {
					// current part has the last
					// byte required
					lbPartOffset := partOffset + toRead - 1

					// round up the lbPartOffset
					// to the end of the
					// corresponding DARE package

     * @throws IOException if an I/O error occurs
     */
    protected <T extends Response> long doSend(final Request request, final T response, final Set<RequestParam> params, final long timeout)
            throws IOException {
        final long firstKey = prepareRequests(request, response, params, timeout);
        doSend(request);
        return firstKey;
    }

    /**
     * @param request
     * @param response

    /**
     * Sends a request to the remote endpoint.
     *
     * @param request the request to send
     * @throws IOException if an I/O error occurs
     */
    protected abstract void doSend(Request request) throws IOException;

    /**
     * Receives a response from the remote endpoint.
     *
     * @param response the response object to populate
     * @throws IOException if an I/O error occurs

      source: Buffer,
      byteCount: Long,
    ) {
      val toRead = minOf(remainingByteCount, byteCount)
      if (toRead > 0L) {
        source.read(buffer, toRead)
      }
      val toSkip = byteCount - toRead
      if (toSkip > 0L) {
        source.skip(toSkip)
      }
      remainingByteCount -= toRead
      receivedByteCount += byteCount
    }

    @Throws(IOException::class)