Function handle_range_request

plugins/compress/compress.cc:87–136

If client request has both of Range and Accept-Encoding header, follow range-request config. */

  If client request has both of Range and Accept-Encoding header, follow range-request config.
 */
void
handle_range_request(TSMBuffer req_buf, TSMLoc req_loc, HostConfiguration *hc)
{
  TSMLoc accept_encoding_hdr_field =
    TSMimeHdrFieldFind(req_buf, req_loc, TS_MIME_FIELD_ACCEPT_ENCODING, TS_MIME_LEN_ACCEPT_ENCODING);
  ts::PostScript accept_encoding_defer([&]() -> void { TSHandleMLocRelease(req_buf, req_loc, accept_encoding_hdr_field); });
  if (accept_encoding_hdr_field == TS_NULL_MLOC) {
    return;
  }

  TSMLoc         range_hdr_field = TSMimeHdrFieldFind(req_buf, req_loc, TS_MIME_FIELD_RANGE, TS_MIME_LEN_RANGE);
  ts::PostScript range_defer([&]() -> void { TSHandleMLocRelease(req_buf, req_loc, range_hdr_field); });
  if (range_hdr_field == TS_NULL_MLOC) {
    return;
  }

  debug("Both of Accept-Encoding and Range header are found in the request");

  switch (hc->range_request_ctl()) {
  case RangeRequestCtrl::REMOVE_RANGE: {
    debug("Remove the Range header by remove-range config");
    while (range_hdr_field) {
      TSMLoc next_dup = TSMimeHdrFieldNextDup(req_buf, req_loc, range_hdr_field);
      TSMimeHdrFieldDestroy(req_buf, req_loc, range_hdr_field);
      TSHandleMLocRelease(req_buf, req_loc, range_hdr_field);
      range_hdr_field = next_dup;
    }
    break;
  }
  case RangeRequestCtrl::REMOVE_ACCEPT_ENCODING: {
    debug("Remove the Accept-Encoding header by remove-accept-encoding config");
    while (accept_encoding_hdr_field) {
      TSMLoc next_dup = TSMimeHdrFieldNextDup(req_buf, req_loc, accept_encoding_hdr_field);
      TSMimeHdrFieldDestroy(req_buf, req_loc, accept_encoding_hdr_field);
      TSHandleMLocRelease(req_buf, req_loc, accept_encoding_hdr_field);
      accept_encoding_hdr_field = next_dup;
    }
    break;
  }
  case RangeRequestCtrl::NO_COMPRESSION:
    // Do NOT touch header - this config is referred by `transformable()` function
    debug("no header modification by no-compression config");
    break;
  case RangeRequestCtrl::NONE:
    [[fallthrough]];
  default:
    debug("Do nothing by none config");
    break;
  }
}
} // namespace

static Data *