Index: lams_common/src/java/org/lamsfoundation/lams/web/filter/ResponseCaptureFilter.java
===================================================================
diff -u
--- lams_common/src/java/org/lamsfoundation/lams/web/filter/ResponseCaptureFilter.java	(revision 0)
+++ lams_common/src/java/org/lamsfoundation/lams/web/filter/ResponseCaptureFilter.java	(revision bda8157a824fd430b5fbc860a56eb28fc75f8b9a)
@@ -0,0 +1,63 @@
+package org.lamsfoundation.lams.web.filter;
+
+import java.io.*;
+import javax.servlet.*;
+import javax.servlet.http.*;
+import org.lamsfoundation.lams.util.WebUtil;
+import org.lamsfoundation.lams.web.filter.ResponseWrapper;
+import org.apache.log4j.Logger;
+
+/**
+ * @author mtruong
+ *
+ * This ResponseCaptureFilter takes the response that is normally sent
+ * to the client, and outputs all the content into a file.
+ * All servlets which this filter is applied, must set the request 
+ * attribute "filename" to the value of the filename in which the
+ * contents should be saved. For example, if I want to save the 
+ * contents in the directory D:\portfolio\activityId23 with the filename
+ * main.html then the request attribute filename must be
+ * D:\portfolio\activityId23\main.html
+ * 
+ */
+public class ResponseCaptureFilter implements Filter
+{
+
+	private static Logger log = Logger.getLogger(ResponseCaptureFilter.class);
+	
+	public void init(FilterConfig config) throws ServletException
+	{} 
+    public void destroy()
+    {}
+
+    public void doFilter(ServletRequest  request,
+                         ServletResponse response,
+                         FilterChain     chain) throws IOException, ServletException
+	{
+    	log.debug("Inside ResponseCaptureFilter");
+    	
+    	ResponseWrapper responseWrapper = new ResponseWrapper((HttpServletResponse)response);
+        
+        chain.doFilter(request, responseWrapper);
+        
+        String responseBody = responseWrapper.toString(); //output of the original response that was stored in the response wrapper
+        String filename = (String)request.getAttribute(WebUtil.PARAM_FILENAME);
+       
+        if (filename != null && !filename.equals(""))
+        {
+	       	FileWriter file = new FileWriter(filename);
+	        
+	        // System.out.println(responseWrapper.toString());
+	  
+	        file.write(responseBody);
+	        file.close();
+        }
+        
+        //output to browser
+        PrintWriter out = response.getWriter();
+        out.write(responseBody);
+        
+     }
+    
+  
+}
Index: lams_common/src/java/org/lamsfoundation/lams/web/filter/ResponseWrapper.java
===================================================================
diff -u
--- lams_common/src/java/org/lamsfoundation/lams/web/filter/ResponseWrapper.java	(revision 0)
+++ lams_common/src/java/org/lamsfoundation/lams/web/filter/ResponseWrapper.java	(revision bda8157a824fd430b5fbc860a56eb28fc75f8b9a)
@@ -0,0 +1,66 @@
+package org.lamsfoundation.lams.web.filter;
+
+
+import javax.servlet.http.*;
+import java.io.*;
+
+/** A response wrapper that takes everything the client
+ *  would normally output and saves it in one big
+ *  character array. 
+ *  <P>
+ *  Taken from More Servlets and JavaServer Pages
+ *  from Prentice Hall and Sun Microsystems Press,
+ *  http://www.moreservlets.com/.
+ *  &copy; 2002 Marty Hall; may be freely used or adapted.
+ */
+
+public class ResponseWrapper extends HttpServletResponseWrapper{
+
+	private CharArrayWriter charWriter;
+
+	  /** Initializes wrapper.
+	   *  <P>
+	   *  First, this constructor calls the parent
+	   *  constructor. That call is crucial so that the response
+	   *  is stored and thus setHeader, setStatus, addCookie,
+	   *  and so forth work normally.
+	   *  <P>
+	   *  Second, this constructor creates a CharArrayWriter
+	   *  that will be used to accumulate the response.
+	   */
+	  
+	  public ResponseWrapper(HttpServletResponse response) {
+	    super(response);
+	    charWriter = new CharArrayWriter();
+	  }
+
+	  /** When servlets or JSP pages ask for the Writer, 
+	   *  don't give them the real one. Instead, give them
+	   *  a version that writes into the character array.
+	   *  The filter needs to send the contents of the
+	   *  array to the client (perhaps after modifying it).
+	   */
+	  
+	  public PrintWriter getWriter() {
+	    return(new PrintWriter(charWriter));
+	  }
+
+	  /** Get a String representation of the entire buffer.
+	   *  <P>
+	   *  Be sure <B>not</B> to call this method multiple times
+	   *  on the same wrapper. The API for CharArrayWriter
+	   *  does not guarantee that it "remembers" the previous
+	   *  value, so the call is likely to make a new String
+	   *  every time.
+	   */
+	  
+	  public String toString() {
+	    return(charWriter.toString());
+	  }
+
+	  /** Get the underlying character array. */
+	  
+	  public char[] toCharArray() {
+	    return(charWriter.toCharArray());
+	  }
+	}
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