Method recompute_cooked_stuff

src/proxy/hdrs/MIME.cc:3854–3978

////////////////////////////////////////////////////////

void
MIMEHdrImpl::recompute_cooked_stuff(MIMEField *changing_field_or_null)
{
  int         len, tlen;
  const char *s;
  const char *c;
  const char *e;
  const char *token_wks;
  MIMEField  *field;
  uint32_t    mask = 0;

  mime_hdr_cooked_stuff_init(this, changing_field_or_null);

  //////////////////////////////////////////////////
  // (1) cook the Cache-Control header if present //
  //////////////////////////////////////////////////

  // to be safe, recompute unless you know this call is for other cooked field
  if ((changing_field_or_null == nullptr) || (changing_field_or_null->m_wks_idx != MIME_WKSIDX_PRAGMA)) {
    field = mime_hdr_field_find(this, MIME_FIELD_CACHE_CONTROL, MIME_LEN_CACHE_CONTROL);

    if (field) {
      // try pathpaths first -- unlike most other fastpaths, this one
      // is probably more useful for polygraph than for the real world
      if (!field->has_dups()) {
        auto val{field->value_get()};
        if (ptr_len_casecmp(val.data(), val.length(), "public", 6) == 0) {
          mask                                   = MIME_COOKED_MASK_CC_PUBLIC;
          m_cooked_stuff.m_cache_control.m_mask |= mask;
        } else if (ptr_len_casecmp(val.data(), val.length(), "private,no-cache", 16) == 0) {
          mask                                   = MIME_COOKED_MASK_CC_PRIVATE | MIME_COOKED_MASK_CC_NO_CACHE;
          m_cooked_stuff.m_cache_control.m_mask |= mask;
        }
      }

      if (mask == 0) {
        HdrCsvIter csv_iter;

        for (s = csv_iter.get_first(field, &len); s != nullptr; s = csv_iter.get_next(&len)) {
          e = s + len;
          for (c = s; (c < e) && (ParseRules::is_token(*c)); c++) {
            ;
          }
          tlen = c - s;

          // If >= 0 then this is a well known token
          if (hdrtoken_tokenize(s, tlen, &token_wks) >= 0) {
#if TRACK_COOKING
            Dbg(dbg_ctl_http, "recompute_cooked_stuff: got field '%s'", token_wks);
#endif

            HdrTokenHeapPrefix *p                  = hdrtoken_wks_to_prefix(token_wks);
            mask                                   = p->wks_type_specific.u.cache_control.cc_mask;
            m_cooked_stuff.m_cache_control.m_mask |= mask;

#if TRACK_COOKING
            Dbg(dbg_ctl_http, "                        set mask 0x%0X", mask);
#endif