| protected | boolean | cache | whether caching the response should be attempted | 
      
       | protected | boolean | gzip | whether the sent entity should be gzip'ed on the fly | 
      
       | protected | string | eTag | the generated or custom ETag | 
      
       | protected | integer | lastModified | the generated or custom timestamp of last modification | 
      
       | protected | string | cacheControl | Cache-Control setting | 
      
       | protected | string | contentType | the Content-Type of the sent entity | 
      
       | protected | string | contentDisposition | the Content-Disposition of the sent entity | 
      
       | protected | integer | bufferSize | the chunk buffer size used for throttling | 
      
       | protected | double | throttleDelay | the seconds to delay when throttling |