Method do_vary_header_values_match

src/proxy/hdrs/HttpCompat.cc:434–469

///////////////////////////////////////////////////////////////////////// bool HttpCompat::do_vary_header_values_match(MIMEField *hv1, MIMEField *hv2) This routine takes two HTTP header fields and determines if their values "match", as in section 14.43 of RFC2068: "When the cache receives a subsequent request whose Request-URI specifies one or more cache entries including a Vary header, the cac

//
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bool
HttpCompat::do_vary_header_values_match(MIMEField *hdr1, MIMEField *hdr2)
{
  // If both headers are missing, the headers match.
  if (!hdr1 && !hdr2) {
    return true;
  }

  // If one header is missing, the headers do not match.
  if (!hdr1 || !hdr2) {
    return false;
  }

  // Make sure both headers have the same number of comma-
  // separated elements.
  HdrCsvIter iter1, iter2;
  if (iter1.count_values(hdr1) != iter2.count_values(hdr2)) {
    return false;
  }

  int         hdr1_val_len, hdr2_val_len;
  const char *hdr1_val = iter1.get_first(hdr1, &hdr1_val_len);
  const char *hdr2_val = iter2.get_first(hdr2, &hdr2_val_len);

  while (hdr1_val || hdr2_val) {
    if (!hdr1_val || !hdr2_val || hdr1_val_len != hdr2_val_len ||
        ParseRules::strncasecmp_eow(hdr1_val, hdr2_val, hdr1_val_len) == false) {
      return false;
    }

    hdr1_val = iter1.get_next(&hdr1_val_len);
    hdr2_val = iter2.get_next(&hdr2_val_len);
  }

  return true;
}

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