blob: 28f6dc05e382ee19779fad3cb03387b74398738e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
* 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;
}
}
|
