*/
package okhttp3.internal.http1

import okhttp3.Headers
import okio.BufferedSource

/**
 * Parse all headers delimited by "\r\n" until an empty line. This throws if headers exceed 256 KiB.
 */
class HeadersReader(
  val source: BufferedSource,
) {
  private var headerLimit = HEADER_LIMIT.toLong()

  /** Read a single line counted against the header size limit. */
  fun readLine(): String {

     *
     * @param cause the underlying exception
     * @return the real message
     */
    protected static String getRealMessage(final SQLException cause) {
        final StringBuilder buf = new StringBuilder(256);
        buf.append(cause.getMessage()).append(" : [");
        SQLException next = cause.getNextException();
        while (next != null) {

  }

  /** Returns a hash function implementing the SHA-256 algorithm (256 hash bits). */
  public static HashFunction sha256() {
    return Sha256Holder.SHA_256;
  }

  private static final class Sha256Holder {
    static final HashFunction SHA_256 =
        new MessageDigestHashFunction("SHA-256", "Hashing.sha256()");
  }

  /**

      }
    };
    ;

    abstract byte[] hash(Algorithm algorithm, byte[] input);
  }

  private enum Algorithm {
    MD5("MD5", Hashing.md5()),
    SHA_1("SHA-1", Hashing.sha1()),
    SHA_256("SHA-256", Hashing.sha256()),
    SHA_384("SHA-384", Hashing.sha384()),
    SHA_512("SHA-512", Hashing.sha512());

    private final String algorithmName;
    private final HashFunction hashFn;

      }
    };
    ;

    abstract byte[] hash(Algorithm algorithm, byte[] input);
  }

  private enum Algorithm {
    MD5("MD5", Hashing.md5()),
    SHA_1("SHA-1", Hashing.sha1()),
    SHA_256("SHA-256", Hashing.sha256()),
    SHA_384("SHA-384", Hashing.sha384()),
    SHA_512("SHA-512", Hashing.sha512());

    private final String algorithmName;
    private final HashFunction hashFn;

  private val ASCII = Charsets.US_ASCII

  fun encodeQuery(
    host: String,
    type: Int,
  ): ByteString =
    Buffer()
      .apply {
        writeShort(0) // query id
        writeShort(256) // flags with recursion
        writeShort(1) // question count
        writeShort(0) // answerCount
        writeShort(0) // authorityResourceCount
        writeShort(0) // additional

        val nameBuf = Buffer()

   * represented in binary.
   */
  private val FLAGS = arrayOfNulls<String>(0x40) // Highest bit flag is 0x20.
  private val BINARY =
    Array(256) {
      format("%8s", Integer.toBinaryString(it)).replace(' ', '0')
    }

  init {
    FLAGS[FLAG_NONE] = ""
    FLAGS[FLAG_END_STREAM] = "END_STREAM"

    val prefixFlags = intArrayOf(FLAG_END_STREAM)

  }

  public void testGrowBuffer() { // need to grow past an initial 1024 byte buffer
    StringBuilder input = new StringBuilder();
    StringBuilder expected = new StringBuilder();
    for (int i = 256; i < 1024; i++) {
      input.append((char) i);
      expected.append("[" + i + "]");
    }
    assertThat(SIMPLE_ESCAPER.escape(input.toString())).isEqualTo(expected.toString());
  }

  }

  public void testGrowBuffer() { // need to grow past an initial 1024 byte buffer
    StringBuilder input = new StringBuilder();
    StringBuilder expected = new StringBuilder();
    for (int i = 256; i < 1024; i++) {
      input.append((char) i);
      expected.append("[" + i + "]");
    }
    assertThat(SIMPLE_ESCAPER.escape(input.toString())).isEqualTo(expected.toString());
  }

          "maxIntermediateCas < 0: $maxIntermediateCas"
        }
        this.maxIntermediateCas = maxIntermediateCas
      }

    /**
     * Configure the certificate to generate a 256-bit ECDSA key, which provides about 128 bits of
     * security. ECDSA keys are noticeably faster than RSA keys.
     *
     * This is the default configuration and has been since this API was introduced in OkHttp