Method HandleCacheOpenRead

src/proxy/http/HttpTransact.cc:2376–2422

////////////////////////////////////////////////////////////////////////// Name : HandleCacheOpenRead Description: the cache lookup succeeded - may have been a hit or a miss Details : the cache lookup succeeded. first check if the lookup resulted in a hit or a miss, if the lookup was for an http request. This function just funnels the result into the appropriate functions which handle t

//
///////////////////////////////////////////////////////////////////////////////
void
HttpTransact::HandleCacheOpenRead(State *s)
{
  TxnDbg(dbg_ctl_http_trans, "[HttpTransact::HandleCacheOpenRead]");

  SET_VIA_STRING(VIA_DETAIL_CACHE_TYPE, VIA_DETAIL_CACHE);

  bool read_successful = true;

  if (s->cache_info.object_read == nullptr) {
    read_successful = false;
    //
    // If somebody else was writing the document, proceed just like it was
    // a normal cache miss, except don't try to write to the cache
    //
    if (s->cache_lookup_result == CACHE_LOOKUP_DOC_BUSY) {
      s->cache_lookup_result = CACHE_LOOKUP_MISS;
      s->cache_info.action   = CACHE_DO_NO_ACTION;
    }
  } else {
    CacheHTTPInfo *obj = s->cache_info.object_read;
    if (obj->response_get()->type_get() == HTTP_TYPE_UNKNOWN) {
      read_successful = false;
    }
    if (obj->request_get()->type_get() == HTTP_TYPE_UNKNOWN) {
      read_successful = false;
    }
  }

  if (s->method == HTTP_WKSIDX_PUSH) {
    HandleCacheOpenReadPush(s, read_successful);
  } else if (read_successful == false) {
    // cache miss
    TxnDbg(dbg_ctl_http_trans, "CacheOpenRead -- miss");
    SET_VIA_STRING(VIA_DETAIL_CACHE_LOOKUP, VIA_DETAIL_MISS_NOT_CACHED);
    // Perform DNS for the origin when it is required.
    // 1. If parent configuration does not allow to go to origin there is no need of performing DNS
    // 2. If parent satisfies the request there is no need to go to origin to perform DNS
    HandleCacheOpenReadMiss(s);
  } else {
    // cache hit
    TxnDbg(dbg_ctl_http_trans, "CacheOpenRead -- hit");
    TRANSACT_RETURN(SM_ACTION_API_READ_CACHE_HDR, HandleCacheOpenReadHitFreshness);
  }

  return;
}

///////////////////////////////////////////////////////////////////////////////
// Name       : issue_revalidate