/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.ssh.term;
import org.apache.sshd.common.PtyMode;
import org.apache.sshd.server.Environment;
import java.nio.charset.Charset;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class SSHContext {
/** . */
static final Pattern LC_TYPE_PATTERN = Pattern.compile("(?:\\p{Alpha}{2}_\\p{Alpha}{2}\\.)?([^@]+)(?:@.+)?");
/**
* Parse the <code>LC_CTYPE</code> format or return null.
*
* @param value the value to parse
* @return the corresponding charset
*/
public static Charset parseEncoding(String value) {
Matcher matcher = LC_TYPE_PATTERN.matcher(value);
if (matcher.matches()) {
String encoding = matcher.group(1);
try {
return Charset.forName(encoding);
}
catch (Exception e) {
log.log(Level.FINE, "Could not find charset " + encoding + " for LC_TYPE " + value, e);
return null;
}
} else {
log.log(Level.FINE, "Could not parse LC_TYPE " + value);
}
return null;
}
/** . */
private static final Logger log = Logger.getLogger(SSHContext.class.getName());
/** . */
public final int verase;
/** . */
private final Environment env;
/** . */
public final Charset encoding;
public SSHContext(Environment env) {
if (env == null) {
throw new NullPointerException("No null env");
}
//
Integer verase = env.getPtyModes().get(PtyMode.VERASE);
String LC_CTYPE = env.getEnv().get("LC_CTYPE");
Charset encoding;
if (LC_CTYPE != null) {
encoding = parseEncoding(LC_CTYPE);
} else {
encoding = null;
}
//
this.env = env;
this.verase = verase != null ? verase : -1;
this.encoding = encoding;
}
public int getWidth() {
String s = env.getEnv().get(Environment.ENV_COLUMNS);
int width = -1;
if (s != null) {
try {
width = Integer.parseInt(s);
}
catch (NumberFormatException e) {
log.log(Level.WARNING, "Could not parse ssh term width " + s);
}
}
return width;
}
public int getHeight() {
String s = env.getEnv().get(Environment.ENV_LINES);
int height = -1;
if (s != null) {
try {
height = Integer.parseInt(s);
}
catch (NumberFormatException e) {
log.log(Level.WARNING, "Could not parse ssh term height " + s);
}
}
return height;
}
public String getProperty(String key)
{
return env.getEnv().get(key);
}
}