Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/server/filter/NoCacheFilter.java @ 5409:8b29a94ebdd8
SCHEMA CHANGE: add table for flood marks and missing DROPs for jetties
author | Tom Gottfried <tom@intevation.de> |
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date | Mon, 25 Mar 2013 17:51:33 +0100 |
parents | 8af500d62098 |
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Move GGInAFilter and NoCacheFilter to an own package
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1 package de.intevation.flys.client.server.filter; |
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2 |
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3 import java.io.IOException; |
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4 import java.util.Date; |
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5 |
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6 import javax.servlet.Filter; |
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7 import javax.servlet.FilterChain; |
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8 import javax.servlet.FilterConfig; |
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9 import javax.servlet.ServletException; |
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10 import javax.servlet.ServletRequest; |
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11 import javax.servlet.ServletResponse; |
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12 import javax.servlet.http.HttpServletRequest; |
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13 import javax.servlet.http.HttpServletResponse; |
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14 |
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15 import org.apache.log4j.Logger; |
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16 |
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17 /** ServletFilter to avoid caching for GWTs *.nocache.* files. */ |
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18 public class NoCacheFilter implements Filter { |
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19 |
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20 private static final long DAY = 86400000L; |
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21 |
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22 private static final String NO_CACHE = ".nocache."; |
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23 |
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24 private static Logger log = Logger.getLogger(NoCacheFilter.class); |
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25 |
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26 /** |
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27 * Initialize. |
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28 */ |
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29 @Override |
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30 public void init(FilterConfig config) |
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31 throws ServletException |
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32 { |
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33 } |
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34 |
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35 |
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36 /** |
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37 * Called when filter in chain invoked. |
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38 * @param req request to servlet |
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39 * @param resp response of servlet |
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40 * @param chain the filter chain |
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41 */ |
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42 @Override |
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43 public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) |
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44 throws IOException, ServletException |
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45 { |
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46 HttpServletRequest httpreq = (HttpServletRequest)req; |
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47 String uri = httpreq.getRequestURI(); |
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48 |
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49 if (uri.contains(NO_CACHE)) { |
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50 log.debug("Set no-cache for " + uri); |
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51 |
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52 Date now = new Date(); |
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53 HttpServletResponse httpresp = (HttpServletResponse)resp; |
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54 httpresp.setDateHeader("Date", now.getTime()); |
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55 httpresp.setDateHeader("Expires", now.getTime() - DAY); |
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56 httpresp.setHeader("Pragma", "no-cache"); |
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57 httpresp.setHeader("Cache-control", |
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58 "no-cache, no-store, must-revalidate"); |
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59 } |
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60 |
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61 chain.doFilter(req, resp); |
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62 } |
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63 |
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64 |
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65 /** |
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66 * Do nothing at destruction. |
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67 */ |
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68 @Override |
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69 public void destroy() { |
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70 } |
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71 } |
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72 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |