Method CacheKey

plugins/cachekey/cachekey.cc:243–293

* @brief Constructor setting up the cache key prefix, initializing request info. * @param txn transaction handle. * @param separator cache key elements separator * @param uriType type of the URI used to create the cachekey ("remap" or "pristine") * @param rri remap request info */

 * @param rri remap request info
 */
CacheKey::CacheKey(TSHttpTxn txn, String separator, CacheKeyUriType uriType, CacheKeyKeyType keyType, TSRemapRequestInfo *rri)
  : _txn(txn), _separator(std::move(separator)), _uriType(uriType), _keyType(keyType)
{
  _key.reserve(512);

  _remap = (nullptr != rri);

  /* Get the URI and header to base the cachekey on.
   * @TODO it might make sense to add more supported URI types */

  CacheKeyDebug("setting %s from a %s plugin", getCacheKeyKeyTypeName(_keyType), _remap ? "remap" : "global");

  if (_remap) {
    if (PRISTINE == _uriType) {
      if (TS_SUCCESS != TSHttpTxnPristineUrlGet(_txn, &_buf, &_url)) {
        /* Failing here is unlikely. No action seems the only reasonable thing to do from within this plug-in */
        CacheKeyError("failed to get pristine URI handle");
        return;
      }
      CacheKeyDebug("using pristine uri '%s'", getUri(_buf, _url).c_str());
    } else {
      _buf = rri->requestBufp;
      _url = rri->requestUrl;
      CacheKeyDebug("using remap uri '%s'", getUri(_buf, _url).c_str());
    }
    _hdrs = rri->requestHdrp;
  } else {
    if (TS_SUCCESS != TSHttpTxnClientReqGet(_txn, &_buf, &_hdrs)) {
      /* Failing here is unlikely. No action seems the only reasonable thing to do from within this plug-in */
      CacheKeyError("failed to get client request handle");
      return;
    }

    if (PRISTINE == _uriType) {
      if (TS_SUCCESS != TSHttpTxnPristineUrlGet(_txn, &_buf, &_url)) {
        TSHandleMLocRelease(_buf, TS_NULL_MLOC, _hdrs);
        CacheKeyError("failed to get pristine URI handle");
        return;
      }
      CacheKeyDebug("using pristine uri '%s'", getUri(_buf, _url).c_str());
    } else {
      if (TS_SUCCESS != TSHttpHdrUrlGet(_buf, _hdrs, &_url)) {
        TSHandleMLocRelease(_buf, TS_NULL_MLOC, _hdrs);
        CacheKeyError("failed to get URI handle");
        return;
      }
      CacheKeyDebug("using post-remap uri '%s','", getUri(_buf, _url).c_str());
    }
  }
  _valid = true; /* success, we got all necessary elements - URI, headers, etc. */
}

CacheKey::~CacheKey()
{