Abstract: A method and system to programmatically respond to detected variants associated with requests are provided. Data files are generated to respond to subsequent instances for the requests. Each request is checked to determine the variants. A combination of variants included in each request specifies a response type. Flat files are cacheable versions of requested data that implement the variant combinations associated with the request. After the variants in subsequent requests are detected, a response that is identical to the initial response to a previous request having a similar variant combinations is generated. The generated response to the subsequent request may include redirection to a flat file, modification of data files, or other appropriate actions.