filter/plugins/FTP__ServiceCheck.java

//---PACKAGE DECLARATION---
package uk.ac.ukc.iscream.filter.plugins;

//---IMPORTS---
import uk.ac.ukc.iscream.filter.PluginServiceCheck;
import java.net.*;
import java.io.*;

/**
 * A quick FTP service checker.
 *
 * @author  $Author$
 * @version $Id$
 */
public class FTP__ServiceCheck implements PluginServiceCheck {

//---FINAL ATTRIBUTES---

    /**
     * The current CVS revision of this class
     */
    public final String REVISION = "$Revision: 1.3 $";
    
    public final String DESC = "Checks that an FTP server is alive.";
    
//---STATIC METHODS---

//---CONSTRUCTORS---

//---PUBLIC METHODS---

    /**
     * Performs the service check on a given host.
     *
     * @param hostname the host to check
     * @return XML data representing the result of the test
     */
    public String runServiceCheck(String hostname){
        String status = "";
        String message = "";
        try {
            Socket socket = new Socket(hostname, 21);
            BufferedReader socketIn = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            String response = socketIn.readLine();
            if(response.startsWith("220")) {
                status = "0";
                message = "Good Header received: "+response;
            }
            else {
                status = "1";
                message = "Bad Header received: "+response;
            }
            socketIn.close();
            socket.close();
        } catch (Exception e) {
            status = "0";
            message = "Service check failed to establish connection to host: " + e.getMessage();
       }
        // send the results back
        return "<FTP status=\"" + status + "\" message=\"" + message + "\"></FTP>";
    }

    /**
     * return the String representation of what the filter does
     */
    public String getDescription(){
        return DESC;
    }

//---PRIVATE METHODS---

//---ACCESSOR/MUTATOR METHODS---

//---ATTRIBUTES---

//---STATIC ATTRIBUTES---

}
Revision:	1.1
Committed:	Wed Mar 7 13:04:44 2001 UTC (23 years, 3 months ago) by tdb
Branch:	MAIN
Log Message:	Added a selection of new Service Checks. These are basic, and only get back a simple line from the server. This could probably better be done with an abstract class. Actually, it needs to be considered whether it matters what is sent back, because maybe we just care about the fact a service exists.
#	User	Rev	Content
1	tdb	1.1	//---PACKAGE DECLARATION---
2			package uk.ac.ukc.iscream.filter.plugins;
3
4			//---IMPORTS---
5			import uk.ac.ukc.iscream.filter.PluginServiceCheck;
6			import java.net.*;
7			import java.io.*;
8
9			/**
10			* A quick FTP service checker.
11			*
12			* @author $Author$
13			* @version $Id$
14			*/
15			public class FTP__ServiceCheck implements PluginServiceCheck {
16
17			//---FINAL ATTRIBUTES---
18
19			/**
20			* The current CVS revision of this class
21			*/
22			public final String REVISION = "$Revision: 1.3 $";
23
24			public final String DESC = "Checks that an FTP server is alive.";
25
26			//---STATIC METHODS---
27
28			//---CONSTRUCTORS---
29
30			//---PUBLIC METHODS---
31
32			/**
33			* Performs the service check on a given host.
34			*
35			* @param hostname the host to check
36			* @return XML data representing the result of the test
37			*/
38			public String runServiceCheck(String hostname){
39			String status = "";
40			String message = "";
41			try {
42			Socket socket = new Socket(hostname, 21);
43			BufferedReader socketIn = new BufferedReader(new InputStreamReader(socket.getInputStream()));
44			String response = socketIn.readLine();
45			if(response.startsWith("220")) {
46			status = "0";
47			message = "Good Header received: "+response;
48			}
49			else {
50			status = "1";
51			message = "Bad Header received: "+response;
52			}
53			socketIn.close();
54			socket.close();
55			} catch (Exception e) {
56			status = "0";
57			message = "Service check failed to establish connection to host: " + e.getMessage();
58			}
59			// send the results back
60			return "<FTP status=\"" + status + "\" message=\"" + message + "\"></FTP>";
61			}
62
63			/**
64			* return the String representation of what the filter does
65			*/
66			public String getDescription(){
67			return DESC;
68			}
69
70			//---PRIVATE METHODS---
71
72			//---ACCESSOR/MUTATOR METHODS---
73
74			//---ATTRIBUTES---
75
76			//---STATIC ATTRIBUTES---
77
78			}