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/*******************************************************************************
* Copyright (c) 2008, 2014 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.help.internal.base.util;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import org.eclipse.help.internal.base.remote.HttpsUtility;
public class TestConnectionUtility {
//This class provides a utility for testing if a connection
//can be made to a given URL
private static final String PATH_TOC = "/toc"; //$NON-NLS-1$
private static final String PROTOCOL = "http"; //$NON-NLS-1$
private static final String PROTOCOL_HTTPS = "https"; //$NON-NLS-1$
private final static int SOCKET_TIMEOUT = 5000; //milliseconds
public static boolean testConnection(String thisHost, String thisPort,
String thisPath, String thisProtocol) {
boolean validConnection = true;
String urlConnection = ""; //$NON-NLS-1$
// Build connection string
if (thisPort.equals("80")) //$NON-NLS-1$
urlConnection = thisProtocol + "://" + thisHost + thisPath; //$NON-NLS-1$
else
urlConnection = thisProtocol + "://" + thisHost + ":" + thisPort + thisPath; //$NON-NLS-1$ //$NON-NLS-2$
if(thisProtocol.equalsIgnoreCase(PROTOCOL))
{
// Test Connection. If exception thrown, invalid connection
try {
// Validate Toc connection...
URL testTocURL = new URL(urlConnection + PATH_TOC);
validConnection = isValidToc(testTocURL);
} catch (MalformedURLException e) {
validConnection = false;
}
}
else if(thisProtocol.equalsIgnoreCase(PROTOCOL_HTTPS))
{
// Validate Toc connection...
validConnection = HttpsUtility.canConnectToHttpsURL(urlConnection + PATH_TOC);
}
return validConnection;
}
private static boolean isValidToc(URL url)
{
InputStream in = null;
try{
URLConnection connection = ProxyUtil.getConnection(url);
setTimeout(connection, SOCKET_TIMEOUT);
connection.connect();
in = connection.getInputStream();
if (in!=null)
{
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while (( line = reader.readLine())!=null){
if (line.indexOf("<tocContributions>")>-1) { //$NON-NLS-1$
reader.close();
return true;
}
}
reader.close();
}
}catch (Exception ex){}
finally{
try {
if (in!=null)
in.close();
} catch (IOException e) {}
}
return false;
}
private static void setTimeout(URLConnection conn, int milliseconds) {
conn.setConnectTimeout(milliseconds);
}
}
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