Method appendCookies

plugins/cachekey/cachekey.cc:585–632

* @brief Append cookies by following the rules specified in the cookies config object. * @param config cookies-related configuration containing information about which cookies need to be appended to the key. * @note Add the cookies to "hier-part" (RFC 3986), always sort them in the cache key. */

 * @note Add the cookies to "hier-part" (RFC 3986), always sort them in the cache key.
 */
void
CacheKey::appendCookies(const ConfigCookies &config)
{
  if (config.toBeRemoved() || config.toBeSkipped()) {
    /* Don't append any cookies to the cache key. */
    return;
  }

  TSMLoc    field;
  StringSet cset; /* sort and uniquify the cookies list in the cache key */

  for (field = TSMimeHdrFieldFind(_buf, _hdrs, TS_MIME_FIELD_COOKIE, TS_MIME_LEN_COOKIE); field != TS_NULL_MLOC;
       field = ::nextDuplicate(_buf, _hdrs, field)) {
    int count = TSMimeHdrFieldValuesCount(_buf, _hdrs, field);

    for (int i = 0; i < count; ++i) {
      const char *value;
      int         len;

      value = TSMimeHdrFieldValueStringGet(_buf, _hdrs, field, i, &len);
      if (value == nullptr || len == 0) {
        continue;
      }

      std::istringstream istr(String(value, len));
      String             cookie;

      while (std::getline(istr, cookie, ';')) {
        ::ltrim(cookie); // Trim leading spaces.

        String::size_type pos(cookie.find_first_of('='));
        String            name(cookie.substr(0, pos == String::npos ? cookie.size() : pos));

        /* We only add it to the cache key it is in the cookie set. */
        if (config.toBeAdded(name)) {
          cset.insert(cookie);
        }
      }
    }
  }

  /* We are iterating over the cookies in client order,
   * but the cache key needs a stable ordering, so we sort via std::set. */
  String cookies_keys = containerToString<StringSet, StringSet::const_iterator>(cset, "", ";");
  if (!cookies_keys.empty()) {
    append(cookies_keys);
  }
}

/**
 * @brief Append query parameters by following the rules specified in the query configuration object.