response.setHeader("Cache-Control","no-cache"); //HTTP 1.1
?response.setHeader("Pragma","no-cache"); //HTTP 1.0
?response.setDateHeader ("Expires", 0); //prevents caching at the proxy server
response.setHeader("Cache-Control","no-cache"); //HTTP 1.1
?response.setHeader("Pragma","no-cache"); //HTTP 1.0
?response.setDateHeader ("Expires", 0); //prevents caching at the proxy server
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