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package com.c2kernel.scripting;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.InterruptedIOException;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.StringTokenizer;
import org.omg.CORBA.ORB;
import org.tanukisoftware.wrapper.WrapperManager;
import com.c2kernel.entity.proxy.AgentProxy;
import com.c2kernel.entity.proxy.EntityProxyManager;
import com.c2kernel.lookup.LDAPLookup;
import com.c2kernel.persistency.TransactionManager;
import com.c2kernel.process.Gateway;
import com.c2kernel.utils.Logger;
import com.c2kernel.utils.Resource;
import com.c2kernel.utils.server.SocketHandler;
import com.ibm.bsf.BSFEngine;
import com.ibm.bsf.BSFException;
import com.ibm.bsf.BSFManager;
/**************************************************************************
*
* $Revision: 1.16 $
* $Date: 2005/08/31 07:20:40 $
*
* Copyright (C) 2003 CERN - European Organization for Nuclear Research
* All rights reserved.
**************************************************************************/
public class ScriptConsole implements SocketHandler {
BufferedReader input;
PrintStream output;
Socket socket = null;
BSFManager manager;
BSFEngine context;
static ArrayList securityHosts = new ArrayList();
public static final short NONE = 0;
public static final short ALLOW = 1;
public static final short DENY = 2;
static short securityMode;
static {
securityMode = ALLOW;
String hosts = Gateway.getProperty("ItemServer.Console.allow");
if (hosts == null || hosts.equals("")) {
securityMode = DENY;
hosts = Gateway.getProperty("ItemServer.Console.deny");
}
if (hosts == null || hosts.equals("")) { // by default only allow localhost
securityMode = ALLOW;
securityHosts.add("127.0.0.1");
}
else {
StringTokenizer tok = new StringTokenizer(hosts, ",");
while(tok.hasMoreTokens()) {
try {
securityHosts.add(InetAddress.getByName(tok.nextToken()).getHostAddress());
} catch (UnknownHostException ex) {
Logger.error("Host not found "+ex.getMessage());
}
}
}
}
public ScriptConsole() {
}
public String getName() {
return "Script Console";
}
public boolean isBusy() {
return (socket != null);
}
public void setSocket(Socket newSocket) {
try {
input = new BufferedReader(new InputStreamReader(newSocket.getInputStream()));
OutputStreamWriter ansi = new OutputStreamWriter(newSocket.getOutputStream(), "US-ASCII");
output = new PrintStream(newSocket.getOutputStream());
newSocket.setSoTimeout(0);
socket = newSocket;
} catch (IOException ex) {
try {
newSocket.close();
} catch (IOException ex2) {
}
socket = null;
return;
}
}
public void shutdown() {
Socket closingSocket = socket;
socket = null;
if (closingSocket == null)
return;
try {
Logger.removeLogStream(output);
closingSocket.shutdownInput();
closingSocket.shutdownOutput();
closingSocket.close();
Logger.msg("Script console to "+closingSocket.getInetAddress()+" closed");
} catch (IOException e) {
Logger.error("Script Console to " + closingSocket.getInetAddress() + " - Error closing.");
Logger.error(e);
}
}
public void run() {
// check permission
boolean allowed = true;
if (securityMode!=NONE) {
if (securityHosts.contains(socket.getInetAddress().getHostAddress())) {
if (securityMode==DENY)
allowed = false;
}
else if (securityMode==ALLOW)
allowed = false;
}
if (!allowed) {
Logger.error("Host "+socket.getInetAddress()+" access denied");
output.println("Host "+socket.getInetAddress()+" access denied");
shutdown();
return;
}
// get system objects
try {
Logger.addLogStream(output, 0);
try {
manager = new BSFManager();
manager.declareBean("storage", Gateway.getStorage(), TransactionManager.class);
manager.declareBean("db", Gateway.getStorage().getDb(), TransactionManager.class);
manager.declareBean("proxy", Gateway.getProxyManager(), EntityProxyManager.class);
manager.declareBean("lookup", Gateway.getLDAPLookup(), LDAPLookup.class);
manager.declareBean("orb", Gateway.getORB(), ORB.class);
try {
manager.declareBean("system", Gateway.getProxyManager().getProxy(
Gateway.getLDAPLookup().getRoleManager().getAgentPath("system")), AgentProxy.class);
} catch (Exception ex) {
output.println("System agent unavailable");
}
context = manager.loadScriptingEngine("javascript");
} catch (BSFException ex) {
output.println("Error initialising environment objects");
output.flush();
shutdown();
}
StringBuffer commandBuffer = new StringBuffer();
while (socket != null) {
output.println();
output.print('>');
String command = null;
boolean gotCommand = false;
while (!gotCommand) {
try {
command = input.readLine();
gotCommand = true;
} catch (InterruptedIOException ex) {
}
}
if (command == null) // disconnected
shutdown();
else {
if (command.equals("exit")) {
shutdown();
continue;
}
else if(command.startsWith("log")) {
try {
int newLogLevel = Integer.parseInt(command.substring(4));
Logger.removeLogStream(output);
Logger.addLogStream(output, newLogLevel);
Logger.msg("Log level for "+socket.getInetAddress()+" set to "+newLogLevel);
continue;
} catch (NumberFormatException ex) { }
}
else if(command.equals("help")) {
output.println(Resource.getTextResource("textFiles/consoleHelp.txt"));
continue;
}
else if(command.equals("version")) {
output.println("Domain version: "+Resource.getDomainVersion());
output.println("Kernel version: "+Resource.getKernelVersion());
continue;
}
try {
if (command.endsWith("\\")) {
commandBuffer.append(command.substring(0,command.length()-1));
continue;
}
commandBuffer.append(command);
command = commandBuffer.toString();
commandBuffer = new StringBuffer();
Logger.msg("Console command from "+socket.getInetAddress()+": "+command);
// process control
if (command.equals("shutdown")) {
WrapperManager.stop(0);
}
else {
Object response = context.eval("Command", 0, 0, command);
if (response instanceof org.mozilla.javascript.Undefined)
output.println("Ok");
else
output.println(response);
}
} catch (Throwable ex) {
ex.printStackTrace(output);
}
output.flush();
}
}
} catch (IOException ex) {
Logger.error("IO Exception reading from script console socket");
shutdown();
}
}
}
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