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ajm |
1.1 |
//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.filter.plugins; |
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.filter.PluginServiceCheck; |
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import java.net.URL; |
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ajm |
1.2 |
import java.net.HttpURLConnection; |
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ajm |
1.1 |
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/** |
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* A first REAL service check! ;-) |
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* Connects on port 80 and performs a simple HTTP HEAD request. |
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* Currently it sends back 200 for OK, anything else indicates a failure. |
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* |
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ajm |
1.5 |
* @author $Author: ajm4 $ |
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ajm |
1.6 |
* @version $Id: HTTP__ServiceCheck.java,v 1.5 2001/03/05 15:46:12 ajm4 Exp $ |
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ajm |
1.1 |
*/ |
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public class HTTP__ServiceCheck implements PluginServiceCheck { |
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//---FINAL ATTRIBUTES--- |
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/** |
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* The current CVS revision of this class |
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*/ |
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ajm |
1.6 |
public final String REVISION = "$Revision: 1.5 $"; |
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ajm |
1.1 |
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public final String DESC = "Checks that a webserver is responding to requests."; |
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//---STATIC METHODS--- |
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//---CONSTRUCTORS--- |
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//---PUBLIC METHODS--- |
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/** |
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* Performs the service check on a given host. |
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* |
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* @param hostname the host to check |
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tdb |
1.3 |
* @return XML data representing the result of the test |
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ajm |
1.1 |
*/ |
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public String runServiceCheck(String hostname){ |
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ajm |
1.2 |
String status = ""; |
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String message = ""; |
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try { |
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HttpURLConnection connection = (HttpURLConnection) ((new URL("HTTP://" + hostname)).openConnection()); |
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// only get the head as we don't want any real content |
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connection.setRequestMethod("HEAD"); |
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// let the server know who we are, just to be nice, and get our name about ;p |
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connection.setRequestProperty("User-Agent", "i-scream HTTP Service Checker v" + REVISION.substring(11, REVISION.length() - 2)); |
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// connect and do the request |
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connection.connect(); |
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ajm |
1.6 |
if (connection.getResponseCode() == 200 ) { |
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ajm |
1.5 |
status = "0"; |
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ajm |
1.4 |
} else { |
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ajm |
1.5 |
status = "1"; |
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ajm |
1.4 |
} |
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ajm |
1.2 |
message = connection.getResponseMessage(); |
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connection.disconnect(); |
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} catch (Exception e) { |
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ajm |
1.5 |
status = "1"; |
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ajm |
1.2 |
message = "Service check failed to establish connection to host:" + e.getMessage(); |
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} |
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ajm |
1.1 |
// send the results back |
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ajm |
1.2 |
return "<HTTP status=\"" + status + "\" message=\"" + message + "\"></HTTP>"; |
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ajm |
1.1 |
} |
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/** |
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* return the String representation of what the filter does |
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*/ |
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public String getDescription(){ |
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return DESC; |
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} |
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//---PRIVATE METHODS--- |
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//---ACCESSOR/MUTATOR METHODS--- |
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//---ATTRIBUTES--- |
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//---STATIC ATTRIBUTES--- |
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} |
