[Archive-access-cvs] SF.net SVN: archive-access:[2841] trunk/archive-access/projects/nutchwax/ archive/src/java/org/archive/nutchwax/CacheSettingsFilter.java

[<bi...@us...>]

Revision: 2841
          http://archive-access.svn.sourceforge.net/archive-access/?rev=2841&view=rev
Author:   binzino
Date:     2009-10-27 22:47:30 +0000 (Tue, 27 Oct 2009)

Log Message:
-----------
Ported from NW 0.12.9.

Added Paths:
-----------
    trunk/archive-access/projects/nutchwax/archive/src/java/org/archive/nutchwax/CacheSettingsFilter.java

Added: trunk/archive-access/projects/nutchwax/archive/src/java/org/archive/nutchwax/CacheSettingsFilter.java
===================================================================
--- trunk/archive-access/projects/nutchwax/archive/src/java/org/archive/nutchwax/CacheSettingsFilter.java	                        (rev 0)
+++ trunk/archive-access/projects/nutchwax/archive/src/java/org/archive/nutchwax/CacheSettingsFilter.java	2009-10-27 22:47:30 UTC (rev 2841)
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2008 Internet Archive.
+ * 
+ * This file is part of the archive-access tools project
+ * (http://sourceforge.net/projects/archive-access).
+ * 
+ * The archive-access tools are free software; you can redistribute them and/or
+ * modify them under the terms of the GNU Lesser Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or any
+ * later version.
+ * 
+ * The archive-access tools are distributed in the hope that they will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+ * Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser Public License along with
+ * the archive-access tools; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+package org.archive.nutchwax;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.ServletOutputStream;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpServletResponseWrapper;
+
+import javax.xml.transform.Source;
+import javax.xml.transform.stream.StreamSource;
+import javax.xml.transform.Templates;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.stream.StreamResult;
+
+
+public class CacheSettingsFilter implements Filter
+{
+  private String maxAge;
+
+  public void init( FilterConfig config )
+    throws ServletException
+  {
+    this.maxAge = config.getInitParameter( "max-age" );
+
+    if ( this.maxAge != null )
+      {
+        this.maxAge = this.maxAge.trim( );
+        
+        if ( this.maxAge.length( ) == 0 )
+          {
+            this.maxAge = null;
+          }
+        else
+          {
+            this.maxAge = "max-age=" + this.maxAge;
+          }
+      }
+  }
+
+  public void doFilter( ServletRequest request, ServletResponse response, FilterChain chain )
+    throws IOException, ServletException 
+  {
+    HttpServletResponse res = (HttpServletResponse) response;
+    
+    res.setDateHeader( "Date", System.currentTimeMillis( ) );
+
+    if ( this.maxAge != null )
+      {
+        res.addHeader( "Cache-Control", this.maxAge );
+      }
+
+    chain.doFilter( request, res );
+  }
+
+  public void destroy()
+  {
+
+  }
+
+}


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