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/*******************************************************************************
* Copyright (c) 2006, 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.remote;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import org.eclipse.help.AbstractContextProvider;
import org.eclipse.help.IContext;
import org.eclipse.help.internal.base.HelpBasePlugin;
import org.eclipse.help.internal.base.util.ProxyUtil;
import org.eclipse.help.internal.context.Context;
import org.eclipse.help.internal.dynamic.DocumentReader;
/*
* Provides the context-sensitive help data that is located on the remote infocenter for a
* particular id, if the system is configured for remote help. If not, returns null.
*/
public class RemoteContextProvider extends AbstractContextProvider {
private static final String PATH_CONTEXT = "/context"; //$NON-NLS-1$
private static final String PARAM_ID = "id"; //$NON-NLS-1$
private static final String PARAM_LANG = "lang"; //$NON-NLS-1$
private static final String PROTOCOL = "http"; //$NON-NLS-1$
private DocumentReader reader;
public IContext getContext(String id, String locale) {
PreferenceFileHandler prefHandler = new PreferenceFileHandler();
String host[] = prefHandler.getHostEntries();
String port[] = prefHandler.getPortEntries();
String path[] = prefHandler.getPathEntries();
String [] protocols = prefHandler.getProtocolEntries();
String isEnabled[] = prefHandler.isEnabled();
// InfoCenters ignore remote content
if (RemoteHelp.isEnabled()) {
int numICs = host.length; // Total number of hosts
//Loop through remote InfoCenters and return first CSH match found
URL url=null;
for (int i = 0; i < numICs; i++) {
if (isEnabled[i].equals("true")) { //$NON-NLS-1$
InputStream in = null;
try {
HttpURLConnection connection;
if(protocols[i].equals(PROTOCOL))
{
url = new URL(PROTOCOL, host[i], new Integer(port[i]).intValue(), path[i]+ PATH_CONTEXT + '?' + PARAM_ID + '=' + id + '&' + PARAM_LANG + '=' + locale);
connection = (HttpURLConnection)ProxyUtil.getConnection(url);
if (connection.getResponseCode() == 200) {
in = connection.getInputStream();
}
}
else
{
url = HttpsUtility.getHttpsURL(protocols[i], host[i], port[i], path[i]+ PATH_CONTEXT + '?' + PARAM_ID + '=' + id + '&' + PARAM_LANG + '=' + locale);
in = HttpsUtility.getHttpsStream(url);
}
if (reader == null) {
reader = new DocumentReader();
}
return (Context) reader.read(in);
} catch (IOException e) {
String msg = "I/O error while trying to contact the remote help server"; //$NON-NLS-1$
HelpBasePlugin.logError(msg, e);
} catch (Throwable t) {
String msg = "Internal error while reading search results from remote server"; //$NON-NLS-1$
HelpBasePlugin.logError(msg, t);
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
// nothing more we can do
}
}
}
}
}
}
return null;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.help.AbstractContextProvider#getPlugins()
*/
public String[] getPlugins() {
// this is a global provider
return null;
}
}
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