Adding JMCR-Stable version

[Benchmarks_CSolver.git] / JMCR-Stable / real-world application / jigsaw / src / org / w3c / jigsaw / filters / NoCacheFilter.java

diff --git a/JMCR-Stable/real-world application/jigsaw/src/org/w3c/jigsaw/filters/NoCacheFilter.java b/JMCR-Stable/real-world application/jigsaw/src/org/w3c/jigsaw/filters/NoCacheFilter.java
new file mode 100644 (file)
index 0000000..6b7e656
--- /dev/null
+++ b/JMCR-Stable/real-world application/jigsaw/src/org/w3c/jigsaw/filters/NoCacheFilter.java
@@ -0,0 +1,73 @@
+// NoCacheFilter.java\r
+// $Id: NoCacheFilter.java,v 1.1 2010/06/15 12:24:58 smhuang Exp $\r
+// (c) COPYRIGHT MIT, INRIA and Keio, 1999.\r
+// Please first read the full copyright statement in file COPYRIGHT.html\r
+\r
+package org.w3c.jigsaw.filters;\r
+\r
+import org.w3c.tools.resources.ProtocolException;\r
+import org.w3c.tools.resources.ReplyInterface;\r
+import org.w3c.tools.resources.RequestInterface;\r
+import org.w3c.tools.resources.ResourceFilter;\r
+\r
+import org.w3c.tools.resources.ProtocolException;\r
+\r
+import org.w3c.www.http.HttpMessage;\r
+\r
+import org.w3c.jigsaw.http.Request;\r
+\r
+/**\r
+ * Transform a Pragma: no-cache into a Cache-Control: max-age=0\r
+ * It is just here to fix some client brokenness.\r
+ */\r
+\r
+public class NoCacheFilter extends ResourceFilter {\r
+\r
+    /**\r
+     * Modify the request to transform a Pragma: no-cache into a \r
+     * Cache-Control: max-age=0\r
+     * @return A Reply instance, if the filter did know how to answer\r
+     * the request without further processing, <strong>null</strong> \r
+     * otherwise. \r
+     * @exception ProtocolException If processing should be interrupted,\r
+     * because an abnormal situation occured. \r
+     */ \r
+    public ReplyInterface ingoingFilter(RequestInterface request) \r
+       throws ProtocolException\r
+    {\r
+       Request req = (Request) request;\r
+       if (req.hasPragma("no-cache")) {\r
+           String pragmas[] = req.getPragma();\r
+           if (pragmas.length == 1) {\r
+               req.setPragma(null);\r
+           } else {\r
+               // remove the no-cache\r
+               String newpragmas[] = new String[pragmas.length - 1];\r
+               for (int i=0, j=0; i<pragmas.length; i++) {\r
+                   if (pragmas[i].equals("no-cache"))\r
+                       continue;\r
+                   newpragmas[j++] = pragmas[i];\r
+               }\r
+               req.setPragma(newpragmas);\r
+           }\r
+           req.setMaxAge(0);\r
+       }\r
+       return null;\r
+    }\r
+\r
+    /**\r
+     * The outgoing filter decorates the reply appropriately.\r
+     * @param request The original request.\r
+     * @param reply The originial reply.\r
+     * @return Always <strong>null</strong>.\r
+     * @exception ProtocolException If processing should be interrupted,\r
+     * because an abnormal situation occured. \r
+     */\r
+\r
+    public ReplyInterface outgoingFilter(RequestInterface req,\r
+                                        ReplyInterface rep) \r
+       throws ProtocolException\r
+    {\r
+       return null;\r
+    }\r
+}\r