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1 package com.openedit.servlet.gzip;
2
3 import java.io.IOException  ;
4
5 import javax.servlet.Filter ;
6 import javax.servlet.FilterChain ;
7 import javax.servlet.FilterConfig ;
8 import javax.servlet.ServletException ;
9 import javax.servlet.ServletRequest ;
10 import javax.servlet.ServletResponse ;
11 import javax.servlet.http.HttpServletRequest ;
12 import javax.servlet.http.HttpServletResponse ;
13
14 public class GzipFilter implements Filter {
15
16 public void doFilter(ServletRequest req, ServletResponse res,
17 FilterChain chain) throws IOException , ServletException {
18 if (req instanceof HttpServletRequest ) {
19 HttpServletRequest request = (HttpServletRequest ) req;
20 HttpServletResponse response = (HttpServletResponse ) res;
21 String ae = request.getHeader("accept-encoding");
22 if (ae != null && ae.indexOf("gzip") != -1) {
23 GzipResponseWrapper wrappedResponse =
25 new GzipResponseWrapper(response);
26 chain.doFilter(req, wrappedResponse);
27 wrappedResponse.finishResponse();
28 return;
29 }
30 chain.doFilter(req, res);
31 }
32 }
33
34 public void init(FilterConfig filterConfig) {
35 }
37
38 public void destroy() {
39 }
41 }
42 |
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