Function appendCacheKey

plugins/prefetch/plugin.cc:211–238

* @brief Get the cachekey used for the particular object in this transaction. * * @param txnp HTTP transaction structure * @param reqBuffer request TSMBuffer * @param destination string reference to where the result is to be appended. * @return true if success or false if failure */

 * @return true if success or false if failure
 */
bool
appendCacheKey(const TSHttpTxn txnp, const TSMBuffer reqBuffer, String &key)
{
  bool   ret    = false;
  TSMLoc keyLoc = TS_NULL_MLOC;
  if (TS_SUCCESS == TSUrlCreate(reqBuffer, &keyLoc)) {
    if (TS_SUCCESS == TSHttpTxnCacheLookupUrlGet(txnp, reqBuffer, keyLoc)) {
      int   urlLen = 0;
      char *url    = TSUrlStringGet(reqBuffer, keyLoc, &urlLen);
      if (nullptr != url) {
        key.append(url, urlLen);
        PrefetchDebug("cache key: %s", key.c_str());
        TSfree(static_cast<void *>(url));
        ret = true;
      }
    } else {
      PrefetchDebug("Failure lookup up cache url");
    }
    TSHandleMLocRelease(reqBuffer, TS_NULL_MLOC, keyLoc);
  } else {
    PrefetchDebug("Failure creating url");
  }

  if (!ret) {
    PrefetchError("failed to get cache key");
  }
  return ret;
}

/**
 * @brief Find out if the object was found fresh in cache.