Method percentDecode

api/src/main/java/io/grpc/Uri.java:1057–1063

Decodes a string of characters in the range [U+0000, U+007F] to bytes. Each percent-encoded sequence (e.g. "%F0" or "%2a", as defined by RFC 3986 2.1) is decoded to the octet it encodes. Other characters are decoded to their code point's single byte value. A literal % character must be encoded a

(CharSequence s)

   *     encoding sequences.
   */
  public static ByteBuffer percentDecode(CharSequence s) {
    // This is large enough because each input character needs *at most* one byte of output.
    ByteBuffer outBuf = ByteBuffer.allocate(s.length());
    percentDecode(s, "input", null, outBuf);
    outBuf.flip();
    return outBuf;
  }

  private static void percentDecode(
      CharSequence s, String what, BitSet allowedChars, ByteBuffer outBuf) {