1 files changed, 52 insertions, 0 deletions
diff --git a/petascope/src/petascope/wcst/transaction/ServiceFirewall.java b/petascope/src/petascope/wcst/transaction/ServiceFirewall.java
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+++ b/petascope/src/petascope/wcst/transaction/ServiceFirewall.java
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+/*
+ * This file is part of PetaScope.
+ *
+ * PetaScope is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * PetaScope is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with PetaScope. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * For more information please see <http://www.PetaScope.org>
+ * or contact Peter Baumann via <baumann@rasdaman.com>.
+ *
+ * Copyright 2009 Jacobs University Bremen, Peter Baumann.
+ */
+package petascope.wcst.transaction;
+
+/** Firewall class for WCS-T. It's job is to detect malitious queries and reject them.
+ * Currently, it only checks that queries do not occur too often. 
+ * 
+ * @author Andrei Aiordachioaie
+ */
+public class ServiceFirewall {
+
+    private static long lastQueryTime = 0;
+    /* Queries should not occur more often than this period (in seconds) */
+    private static final double MIN_QUERY_PERIOD = 10;
+
+    /** Do we reject a certain query through the firewall?
+     *
+     * @param query Query string
+     * @return boolean 
+     */
+    public static boolean reject(String query) {
+        boolean result = true;
+
+        /* Check query period */
+        long currentTime = System.currentTimeMillis();
+        if (((currentTime - lastQueryTime) / 1000) >= MIN_QUERY_PERIOD) {
+            result = false;
+        }
+        lastQueryTime = currentTime;
+
+        return result;
+    }
+}