applet dispatcher (prevent applet caching)

git-svn-id: https://joinup.ec.europa.eu/svn/mocca/trunk@326 8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4

2 files changed, 112 insertions, 1 deletions

diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/AppletDispatcher.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/AppletDispatcher.java
new file mode 100644
index 00000000..26349f7c
--- /dev/null
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/AppletDispatcher.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2008 Federal Chancellery Austria and
+ * Graz University of Technology
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package at.gv.egiz.bku.online.webapp;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.servlet.RequestDispatcher;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * prevent applet caching, 
+ * could be removed once applet is loaded via jnlp
+ *
+ * @author Clemens Orthacker <clemens.orthacker@iaik.tugraz.at>
+ */
+public class AppletDispatcher extends HttpServlet {
+
+  protected final static Log log = LogFactory.getLog(AppletDispatcher.class);
+
+  public static final String DISPATCH_CTX = "dispatch/";
+  public static final String RAND_PREFIX = "__";
+  public static final String RAND_ATTRIBUTE = "rand";
+  public static final Pattern ctxPattern = Pattern.compile(DISPATCH_CTX);
+  public static final Pattern archivePattern = Pattern.compile(RAND_PREFIX + "[a-zA-Z0-9]*\\.jar$");
+
+    /** 
+     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
+     * @param request servlet request
+     * @param response servlet response
+     * @throws ServletException if a servlet-specific error occurs
+     * @throws IOException if an I/O error occurs
+     */
+    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
+    throws ServletException, IOException {
+
+//      String suffix = (String) request.getSession().getAttribute(RAND_CTX_ATTRIBUTE);
+//      log.trace("expecting random suffix " + suffix);
+      
+      String uri = request.getRequestURI();
+      uri = ctxPattern.matcher(uri).replaceAll("");
+//      uri = uri.replaceAll(suffix, ""); //only the applet jar requests contains the randCtx
+      uri = archivePattern.matcher(uri).replaceAll(".jar");
+
+      if (log.isTraceEnabled()) {
+        log.trace("dispatching request URI " + request.getRequestURI() +
+                " to " + uri);
+      }
+      
+      RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(uri);
+      dispatcher.forward(request, response);
+    } 
+
+    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
+    /** 
+     * Handles the HTTP <code>GET</code> method.
+     * @param request servlet request
+     * @param response servlet response
+     * @throws ServletException if a servlet-specific error occurs
+     * @throws IOException if an I/O error occurs
+     */
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response)
+    throws ServletException, IOException {
+        processRequest(request, response);
+    } 
+
+    /** 
+     * Handles the HTTP <code>POST</code> method.
+     * @param request servlet request
+     * @param response servlet response
+     * @throws ServletException if a servlet-specific error occurs
+     * @throws IOException if an I/O error occurs
+     */
+    @Override
+    protected void doPost(HttpServletRequest request, HttpServletResponse response)
+    throws ServletException, IOException {
+        processRequest(request, response);
+    }
+
+    /** 
+     * Returns a short description of the servlet.
+     * @return a String containing servlet description
+     */
+    @Override
+    public String getServletInfo() {
+        return "Short description";
+    }// </editor-fold>
+
+}
diff --git a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/BKURequestHandler.java b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/BKURequestHandler.java
index 68a57fb5..1d0cb7e9 100644
--- a/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/BKURequestHandler.java
+++ b/BKUOnline/src/main/java/at/gv/egiz/bku/online/webapp/BKURequestHandler.java
@@ -51,7 +51,7 @@ public class BKURequestHandler extends SpringBKUServlet {
 
   private static final long serialVersionUID = 1L;
 
-  public final static String REDIRECT_URL_SESSION_ATTRIBUTE="redirectUrl";
+  public final static String REDIRECT_URL_SESSION_ATTRIBUTE = "redirectUrl";
 
   protected Log log = LogFactory.getLog(BKURequestHandler.class);