Function decode_indexed_header_field

src/proxy/http2/HPACK.cc:539–565

[RFC 7541] 6.1. Indexed Header Field Representation

// [RFC 7541] 6.1. Indexed Header Field Representation
//
int64_t
decode_indexed_header_field(MIMEFieldWrapper &header, const uint8_t *buf_start, const uint8_t *buf_end,
                            HpackIndexingTable &indexing_table)
{
  uint64_t index = 0;
  int64_t  len   = 0;

  len = xpack_decode_integer(index, buf_start, buf_end, 7);
  if (len == XPACK_ERROR_COMPRESSION_ERROR) {
    return HPACK_ERROR_COMPRESSION_ERROR;
  }

  if (indexing_table.get_header_field(index, header) == HPACK_ERROR_COMPRESSION_ERROR) {
    return HPACK_ERROR_COMPRESSION_ERROR;
  }

  if (dbg_ctl_hpack_decode.on()) {
    int         decoded_name_len;
    const char *decoded_name = header.name_get(&decoded_name_len);
    int         decoded_value_len;
    const char *decoded_value = header.value_get(&decoded_value_len);

    Dbg(dbg_ctl_hpack_decode, "Decoded field: %.*s: %.*s", decoded_name_len, decoded_name, decoded_value_len, decoded_value);
  }

  return len;
}

//
// [RFC 7541] 6.2. Literal Header Field Representation