| 1 |
/* |
| 2 |
* i-scream central monitoring system |
| 3 |
* http://www.i-scream.org.uk |
| 4 |
* Copyright (C) 2000-2002 i-scream |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or |
| 7 |
* modify it under the terms of the GNU General Public License |
| 8 |
* as published by the Free Software Foundation; either version 2 |
| 9 |
* of the License, or (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 19 |
*/ |
| 20 |
|
| 21 |
//---PACKAGE DECLARATION--- |
| 22 |
package uk.org.iscream.cms.server.filter.plugins; |
| 23 |
|
| 24 |
//---IMPORTS--- |
| 25 |
import uk.org.iscream.cms.server.filter.PluginServiceCheck; |
| 26 |
import java.net.URL; |
| 27 |
import java.net.HttpURLConnection; |
| 28 |
|
| 29 |
/** |
| 30 |
* Tests whether a webserver is responding on port 80. |
| 31 |
* Connects on port 80 and performs a simple HTTP HEAD request. |
| 32 |
* Currently it sends back 200 for OK, anything else indicates a failure. |
| 33 |
* |
| 34 |
* @author $Author: tdb $ |
| 35 |
* @version $Id: HTTP__ServiceCheck.java,v 1.10 2002/05/18 18:16:02 tdb Exp $ |
| 36 |
*/ |
| 37 |
public class HTTP__ServiceCheck implements PluginServiceCheck { |
| 38 |
|
| 39 |
//---FINAL ATTRIBUTES--- |
| 40 |
|
| 41 |
/** |
| 42 |
* The current CVS revision of this class |
| 43 |
*/ |
| 44 |
public final String REVISION = "$Revision: 1.10 $"; |
| 45 |
|
| 46 |
public final String DESC = "Checks that a webserver is responding to requests."; |
| 47 |
|
| 48 |
//---STATIC METHODS--- |
| 49 |
|
| 50 |
//---CONSTRUCTORS--- |
| 51 |
|
| 52 |
//---PUBLIC METHODS--- |
| 53 |
|
| 54 |
/** |
| 55 |
* Performs the service check on a given host. |
| 56 |
* |
| 57 |
* @param hostname the host to check |
| 58 |
* @return XML data representing the result of the test |
| 59 |
*/ |
| 60 |
public String runServiceCheck(String hostname){ |
| 61 |
String status = ""; |
| 62 |
String message = ""; |
| 63 |
try { |
| 64 |
HttpURLConnection connection = (HttpURLConnection) ((new URL("HTTP://" + hostname)).openConnection()); |
| 65 |
// only get the head as we don't want any real content |
| 66 |
connection.setRequestMethod("HEAD"); |
| 67 |
// let the server know who we are, just to be nice, and get our name about ;p |
| 68 |
connection.setRequestProperty("User-Agent", "i-scream HTTP Service Checker v" + REVISION.substring(11, REVISION.length() - 2)); |
| 69 |
// connect and do the request |
| 70 |
connection.connect(); |
| 71 |
if (connection.getResponseCode() == 200 ) { |
| 72 |
status = "0"; |
| 73 |
} else { |
| 74 |
status = "1"; |
| 75 |
} |
| 76 |
message = connection.getResponseMessage(); |
| 77 |
connection.disconnect(); |
| 78 |
} catch (Exception e) { |
| 79 |
status = "1"; |
| 80 |
message = "Service check failed to establish connection to host:" + e.getMessage(); |
| 81 |
} |
| 82 |
// send the results back |
| 83 |
return "<HTTP status=\"" + status + "\" message=\"" + message + "\"></HTTP>"; |
| 84 |
} |
| 85 |
|
| 86 |
/** |
| 87 |
* return the String representation of what the filter does |
| 88 |
*/ |
| 89 |
public String getDescription(){ |
| 90 |
return DESC; |
| 91 |
} |
| 92 |
|
| 93 |
//---PRIVATE METHODS--- |
| 94 |
|
| 95 |
//---ACCESSOR/MUTATOR METHODS--- |
| 96 |
|
| 97 |
//---ATTRIBUTES--- |
| 98 |
|
| 99 |
//---STATIC ATTRIBUTES--- |
| 100 |
|
| 101 |
} |
