return this;
    }

    /**
     * Enables GZIP compression for the request.
     *
     * @return this CurlRequest instance
     */
    public CurlRequest gzip() {
        return compression(GZIP);
    }

    /**
     * Sets the compression type for the request.
     *
     * @param compression the compression type
     * @return this CurlRequest instance
     */

import okio.Buffer
import okio.BufferedSource
import okio.ByteString
import okio.Source
import okio.buffer

/**
 * Read and write HPACK v10.
 *
 * http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-12
 *
 * This implementation uses an array for the dynamic table and a list for indexed entries. Dynamic
 * entries are added to the array, starting in the last position moving forward. When the array
 * fills, it is doubled.

    memory if web socket compression is negotiated but not used.


## Version 4.5.0-RC1

_2020-03-17_

**This release candidate turns on web socket compression.**

The [spec][rfc_7692] includes a sophisticated mechanism for client and server to negotiate
compression features. We strive to offer great performance in our default configuration and so we're

  var i = pos
  while (i < limit) {
    if (b == address.size) return null // Too many groups.

    // Read a delimiter.
    if (i + 2 <= limit && input.startsWith("::", startIndex = i)) {
      // Compression "::" delimiter, which is anywhere in the input, including its prefix.
      if (compress != -1) return null // Multiple "::" delimiters.
      i += 2
      b += 2
      compress = b
      if (i == limit) break

        assertEquals(0, result.length);
    }

    public void test_gzipCompress_and_gzipDecompress() {
        String testData =
                "This is test data for compression that should be long enough to actually compress effectively when using gzip compression algorithm";
        byte[] originalBytes = testData.getBytes();

        byte[] compressed = searchHelper.gzipCompress(originalBytes);

   * Variable-length quantity special cases strings which are longer than 127 bytes.  Values such as
   * cookies can be 4KiB, and should be possible to send.
   *
   *  http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-12#section-5.2
   */
  @Test
  fun largeHeaderValue() {
    val value = CharArray(4096)
    Arrays.fill(value, '!')
    val headerBlock = headerEntries("cookie", String(value))

   * addresses, the output follows <a href="http://tools.ietf.org/html/rfc5952">RFC 5952</a> section
   * 4. The main difference is that this method uses "::" for zero compression, while Java's version
   * uses the uncompressed form (except on Android, where the zero compression is also done). The
   * other difference is that this method outputs any scope ID in the format that it was provided at

     * fit comfortably within a single ethernet packet (1500 bytes) even with framing overhead.
     *
     * For tests this must be big enough to realize real compression on test messages like
     * 'aaaaaaaaaa...'. Our tests check if compression was applied just by looking at the size if
     * the inbound buffer.
     */
    const val DEFAULT_MINIMUM_DEFLATE_SIZE = 1024L
  }

 *  * `com.twitter.hpack.HpackUtil`
 *
 * [twitter_hpack]: https://github.com/twitter/hpack
 */
object Huffman {
  // Appendix C: Huffman Codes
  // http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-12#appendix-B
  private val CODES =
    intArrayOf(
      0x1ff8,
      0x7fffd8,
      0xfffffe2,
      0xfffffe3,
      0xfffffe4,
      0xfffffe5,
      0xfffffe6,
      0xfffffe7,

        }
    }

    /**
     * Compresses data using GZIP compression.
     *
     * @param data The data to compress
     * @return GZIP-compressed data
     * @throws IORuntimeException if compression fails
     */
    protected byte[] gzipCompress(final byte[] data) {
        try (final ByteArrayOutputStream bos = new ByteArrayOutputStream()) {