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POcache control on subdomain in Tomcat 7
 

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  1. POcache control on subdomain in Tomcat 7
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    <p>I can handle cache on core domain say (www.domain.com) using below filter </p> <pre><code>public class cacheControl implements Filter{ FilterConfig filterConfig; public cacheControl() { filterConfig = null; } @Override public void init(FilterConfig filterConfig) throws ServletException { this.filterConfig = filterConfig; } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { String sCache = filterConfig.getInitParameter("cache"); if (sCache != null) { Date _currentDate = new Date(); ((HttpServletResponse) response).setHeader("Cache-Control", sCache); ((HttpServletResponse) response).setHeader("Expires", new Date(_currentDate.getYear(), _currentDate.getMonth(), _currentDate.getDate() + 10).toString()); ((HttpServletResponse) response).setHeader("X-Content-Type-Options", "nosniff"); ((HttpServletResponse) response).setHeader("X-XSS-Protection", "1; mode=block"); ((HttpServletResponse) response).setHeader("X-Frame-Options", "SAMEORIGIN"); ((HttpServletResponse) response).setHeader("X-UA-Compatible", "IE=edge, chrome=1"); } chain.doFilter(request, response); } @Override public void destroy() { filterConfig = null; } } </code></pre> <p>But i put static content like javascripts, css, images on (static.domain.com) and I want to set expiry header for content coming from that static domain. I googled but there is no perfect solution. Please help me to set expiry header for static domain....</p>
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    1. USVicky Thakor
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    1. COAdd the filter into your root `web.xml` and check the URL of the incoming request.
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    2. COI added filter in web.xml
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      1. POcache control on subdomain in Tomcat 7
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    3. COYou could add some parameters to the `Filter` - these work as standard java beans - to make it customisable. But all you need to do if you want to hardcode it is check the URL and branch on its value.
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