Implemented Players, CpuUsage, RamUsage Commands. Updated README

README.md

@@ -2,7 +2,7 @@
 
 # WebConsole
 
-WebConsole is a Spigot plugin for Minecraft 1.14 that enables you to view your server console and manage your server from anywhere. It creates a WebSocket server in the background used by the web interface to send commands, receive your console log and manage your server.
+WebConsole is a Spigot plugin for Minecraft 1.8-1.14 that enables you to view your server console and manage your server from anywhere. It creates a WebSocket server in the background used by the web interface to send commands, receive your console log and manage your server.
 
 Dont worry about privacy: all data is stored in your browser offline and your PC will connect directly to your minecraft server. No intermediary web servers, just you and your server.
 
@@ -67,34 +67,5 @@ WebConsole does not support PEM certificates, so you will need to convert it to
 
 ## Technical information
 
-### WebSocket commands
+You can find how client and server comunicate [here](https://github.com/mesacarlos/WebConsole/wiki/WebSocket-commands-and-responses)
 
-The following tables represent how server communicates with the client(s), something like a language between them.
-
-
-#### Websocket Server -> Client
-
-Server communicate with all connected clients using JSON. The following table shows all possible JSON variables.
-
-| Variable            |Meaning                                                                      |
-|---------------------|-----------------------------------------------------------------------------|
-| status              |Status code (as integer), representing response type. See listing below*     |
-| statusDescription   |Status description (as String) describing response type.                     |
-| respondsTo          |`(Optional)` Original command sent by client which triggered this response|
-| message             |Response content                                                             |
-
-*Status codes are listed below:
- - **010**: Console output.
- - **200**: Ok/Processed.
- - **400**: Unknown command.
- - **401**: Login required/Not logged in.
-
-
-#### Client -> Websocket Server
-
-Clients can communicate with server using commands. The following table shows existing commands.
-
-| Code                |Meaning                                  |Extra info    |
-|---------------------|-----------------------------------------|--------------|
-|LOGIN *(password)*   |Login to start communication with server |              |
-|EXEC *(command)*     |Run desired command in Minecraft Server  |Login required|

plugin.yml

@@ -1,7 +1,6 @@
 name: WebConsole
 main: com.mesacarlos.webconsole.WebConsole
-version: 1.0
+version: 1.1
 description: WebSockets-based web console
-api-version: 1.14
 author: Carlos Mesa
 commands:

pom.xml

@@ -4,7 +4,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>WebConsole</groupId>
 	<artifactId>WebConsole</artifactId>
-	<version>1.0</version>
+	<version>1.1</version>
 	<build>
 		<sourceDirectory>src</sourceDirectory>
 		<plugins>
@@ -59,7 +59,7 @@
 		<dependency>
 			<groupId>org.spigotmc</groupId>
 			<artifactId>spigot-api</artifactId>
-			<version>1.14.2-R0.1-SNAPSHOT</version>
+			<version>1.8.8-R0.1-SNAPSHOT</version>
 			<scope>provided</scope>
 		</dependency>
 		<!-- WebSockets Server Dependency -->

src/com/mesacarlos/webconsole/WebConsole.java

@@ -4,10 +4,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.net.InetSocketAddress;
-import java.security.KeyManagementException;
 import java.security.KeyStore;
-import java.security.KeyStoreException;
-import java.security.UnrecoverableKeyException;
 
 import javax.net.ssl.KeyManagerFactory;
 import javax.net.ssl.SSLContext;
@@ -78,8 +75,7 @@ public class WebConsole extends JavaPlugin {
 	/**
 	 * Start WebSocket server
 	 */
-	private void startWS() throws Exception,
+	private void startWS() throws Exception {
-			KeyStoreException, UnrecoverableKeyException, KeyManagementException {
 		// Create WebSocket server
 		server = new WSServer(this, new InetSocketAddress(config.getString("host"), config.getInt("port")));
 		

src/com/mesacarlos/webconsole/command/CommandFactory.java

@@ -7,7 +7,10 @@ public class CommandFactory {
 	public static HashMap<String, WSCommand> getCommandsHashMap() {
 		HashMap<String, WSCommand> commands = new HashMap<String, WSCommand>();
 		commands.put("LOGIN", new LogInCommand());
-		commands.put("EXEC", new ExecuteCmdCommand());
+		commands.put("EXEC", new ExecCommand());
+		commands.put("PLAYERS", new PlayersCommand());
+		commands.put("CPUUSAGE", new CpuUsageCommand());
+		commands.put("RAMUSAGE", new RamUsageCommand());
 		return commands;
 	}
 }

src/com/mesacarlos/webconsole/command/CpuUsageCommand.java

@@ -0,0 +1,51 @@
+package com.mesacarlos.webconsole.command;
+
+import java.lang.management.ManagementFactory;
+
+import javax.management.Attribute;
+import javax.management.AttributeList;
+import javax.management.MBeanServer;
+import javax.management.ObjectName;
+
+import org.java_websocket.WebSocket;
+
+import com.mesacarlos.webconsole.json.CpuUsage;
+import com.mesacarlos.webconsole.websockets.WSServer;
+
+public class CpuUsageCommand implements WSCommand {
+
+	@Override
+	public void execute(WSServer wsServer, WebSocket conn, String params) {
+		try {
+			double usage = getProcessCpuLoad();
+			wsServer.sendToClient(conn, new CpuUsage("Usage is " + usage + "%", usage));
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+	}
+	
+	/**
+	 * Check out usage for the whole system
+	 * Got from https://stackoverflow.com/questions/18489273/how-to-get-percentage-of-cpu-usage-of-os-from-java
+	 * @return CPU Usage for the whole system
+	 * @throws Exception Something went wrong
+	 */
+	public double getProcessCpuLoad() throws Exception {
+		MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
+		ObjectName name = ObjectName.getInstance("java.lang:type=OperatingSystem");
+		AttributeList list = mbs.getAttributes(name, new String[] {"SystemCpuLoad"});
+
+		if (list.isEmpty())
+			return Double.NaN;
+
+		Attribute att = (Attribute) list.get(0);
+		Double value = (Double) att.getValue();
+
+		// usually takes a couple of seconds before we get real values
+		if (value == -1.0)
+			return Double.NaN;
+		// returns a percentage value with 1 decimal point precision
+		return ((int) (value * 1000) / 10.0);
+	}
+
+}

src/com/mesacarlos/webconsole/command/ExecCommand.java

@@ -8,7 +8,7 @@ import org.java_websocket.WebSocket;
 
 import com.mesacarlos.webconsole.websockets.WSServer;
 
-public class ExecuteCmdCommand implements WSCommand {
+public class ExecCommand implements WSCommand {
 
 	@Override
 	public void execute(WSServer wsServer, WebSocket conn, String command) {

src/com/mesacarlos/webconsole/command/PlayersCommand.java

@@ -0,0 +1,19 @@
+package com.mesacarlos.webconsole.command;
+
+import org.bukkit.Bukkit;
+import org.java_websocket.WebSocket;
+
+import com.mesacarlos.webconsole.json.Players;
+import com.mesacarlos.webconsole.websockets.WSServer;
+
+public class PlayersCommand implements WSCommand{
+
+	@Override
+	public void execute(WSServer wsServer, WebSocket conn, String params) {
+		int connectedPlayers = Bukkit.getOnlinePlayers().size();
+		int maxPlayers = Bukkit.getMaxPlayers();
+		
+		wsServer.sendToClient(conn, new Players("Currently " + connectedPlayers + " connected players for a maximum of " + maxPlayers, connectedPlayers, maxPlayers));
+	}
+	
+}

src/com/mesacarlos/webconsole/command/RamUsageCommand.java

@@ -0,0 +1,21 @@
+package com.mesacarlos.webconsole.command;
+
+import org.java_websocket.WebSocket;
+
+import com.mesacarlos.webconsole.json.RamUsage;
+import com.mesacarlos.webconsole.websockets.WSServer;
+
+public class RamUsageCommand implements WSCommand {
+
+	@Override
+	public void execute(WSServer wsServer, WebSocket conn, String params) {
+		Runtime r = Runtime.getRuntime();
+		
+		int free = (int) r.freeMemory()/1024/1024;
+		int max = (int) r.maxMemory()/1024/1024;
+		int used = max - free;
+		
+		wsServer.sendToClient(conn, new RamUsage(free + "free, " + used + " used," + max + " maximum memmory", free, used, max));
+	}
+
+}

src/com/mesacarlos/webconsole/json/ConsoleOutput.java

@@ -18,11 +18,6 @@ public class ConsoleOutput implements JSONOutput{
 	public String getMessage() {
 		return message;
 	}
-	
-	@Override
-	public String getRespondsTo() {
-		return null;
-	}
 
 	@Override
 	public String toJSON() {

src/com/mesacarlos/webconsole/json/CpuUsage.java

@@ -0,0 +1,42 @@
+package com.mesacarlos.webconsole.json;
+
+import com.google.gson.JsonObject;
+
+public class CpuUsage implements JSONOutput{
+	private String message;
+	private double usage;
+
+	public CpuUsage(String message, double usage) {
+		this.message = message;
+		this.usage = usage;
+	}
+
+	@Override
+	public int getStatusCode() {
+		return 1001;
+	}
+
+	@Override
+	public String getMessage() {
+		return message;
+	}
+	
+	/**
+	 * Gets system CPU Usage
+	 * @return Global CPU Usage
+	 */
+	public double getUsage() {
+		return usage;
+	}
+	
+	@Override
+	public String toJSON() {
+		JsonObject object = new JsonObject();
+		object.addProperty("status", getStatusCode());
+		object.addProperty("statusDescription", "Cpu Usage");
+		object.addProperty("usage", getUsage());
+		object.addProperty("message", getMessage());
+		return object.toString();
+	}
+	
+}

src/com/mesacarlos/webconsole/json/JSONOutput.java

@@ -7,13 +7,6 @@ public interface JSONOutput {
 	 */
 	int getStatusCode();
 	
-	/**
-	 * Returns the command sended by client who created this response.
-	 * In case of a server-generated response (like ConsoleOutput), this will be null
-	 * @return
-	 */
-	String getRespondsTo();
-	
 	/**
 	 * Explanatory message of this response
 	 * @return Explanatory message of this response

src/com/mesacarlos/webconsole/json/LoginRequired.java

@@ -18,11 +18,6 @@ public class LoginRequired implements JSONOutput{
 	public String getMessage() {
 		return message;
 	}
-	
-	@Override
-	public String getRespondsTo() {
-		return null;
-	}
 
 	@Override
 	public String toJSON() {

src/com/mesacarlos/webconsole/json/Players.java

@@ -0,0 +1,45 @@
+package com.mesacarlos.webconsole.json;
+
+import com.google.gson.JsonObject;
+
+public class Players implements JSONOutput{
+	private String message;
+	private int connectedPlayers;
+	private int maxPlayers;
+	
+	public Players(String message, int connectedPlayers, int maxPlayers) {
+		this.message = message;
+		this.connectedPlayers = connectedPlayers;
+		this.maxPlayers = maxPlayers;
+	}
+	
+	@Override
+	public int getStatusCode() {
+		return 1000;
+	}
+	
+	@Override
+	public String getMessage() {
+		return message;
+	}
+	
+	public int getConnectedPlayers() {
+		return connectedPlayers;
+	}
+
+	public int getMaxPlayers() {
+		return maxPlayers;
+	}
+
+	@Override
+	public String toJSON() {
+		JsonObject object = new JsonObject();
+		object.addProperty("status", getStatusCode());
+		object.addProperty("statusDescription", "Players");
+		object.addProperty("connectedPlayers", getConnectedPlayers());
+		object.addProperty("maxPlayers", getMaxPlayers());
+		object.addProperty("message", getMessage());
+		return object.toString();
+	}
+
+}

src/com/mesacarlos/webconsole/json/Processed.java

@@ -25,8 +25,11 @@ public class Processed implements JSONOutput{
 		return message;
 	}
 	
-	@Override
+	/**
-	public String getRespondsTo() {
+	 * The command that originated this response
+	 * @return WebSockets full command and parameters
+	 */
+	private String getRespondsTo() {
 		return respondsTo;
 	}
 	

src/com/mesacarlos/webconsole/json/RamUsage.java

@@ -0,0 +1,64 @@
+package com.mesacarlos.webconsole.json;
+
+import com.google.gson.JsonObject;
+
+public class RamUsage implements JSONOutput {
+	private String message;
+	private int free;
+	private int used;
+	private int max;
+
+	public RamUsage(String message, int free, int used, int max) {
+		this.message = message;
+		this.free = free;
+		this.used = used;
+		this.max = max;
+	}
+
+	@Override
+	public int getStatusCode() {
+		return 1002;
+	}
+
+	@Override
+	public String getMessage() {
+		return message;
+	}
+	
+	/**
+	 * Free amount of RAM, in MB
+	 * @return
+	 */
+	public int getFree() {
+		return free;
+	}
+	
+	/**
+	 * Used amount of RAM, in MB
+	 * @return
+	 */
+	public int getUsed() {
+		return used;
+	}
+	
+	/**
+	 * Max amount of RAM, in MB
+	 * @return
+	 */
+	public int getMax() {
+		return max;
+	}
+
+	@Override
+	public String toJSON() {
+		JsonObject object = new JsonObject();
+		object.addProperty("status", getStatusCode());
+		object.addProperty("statusDescription", "RAM Usage");
+		object.addProperty("free", getFree());
+		object.addProperty("total", getUsed());
+		object.addProperty("max", getMax());
+		object.addProperty("message", getMessage());
+		return object.toString();
+	}
+
+}

src/com/mesacarlos/webconsole/json/UnknownCommand.java

@@ -2,11 +2,11 @@ package com.mesacarlos.webconsole.json;
 
 import com.google.gson.JsonObject;
 
-public class UnknownWSCmd implements JSONOutput{
+public class UnknownCommand implements JSONOutput{
 	private String message;
 	private String respondsTo;
 	
-	public UnknownWSCmd(String message, String respondsTo) {
+	public UnknownCommand(String message, String respondsTo) {
 		this.message = message;
 		this.respondsTo = respondsTo;
 	}
@@ -21,7 +21,10 @@ public class UnknownWSCmd implements JSONOutput{
 		return message;
 	}
 	
-	@Override
+	/**
+	 * The command that originated this response
+	 * @return WebSockets full command and parameters
+	 */
 	public String getRespondsTo() {
 		return respondsTo;
 	}

src/com/mesacarlos/webconsole/websockets/WSServer.java

@@ -16,7 +16,7 @@ import com.mesacarlos.webconsole.json.ConsoleOutput;
 import com.mesacarlos.webconsole.json.JSONOutput;
 import com.mesacarlos.webconsole.json.LoginRequired;
 import com.mesacarlos.webconsole.json.Processed;
-import com.mesacarlos.webconsole.json.UnknownWSCmd;
+import com.mesacarlos.webconsole.json.UnknownCommand;
 import com.mesacarlos.webconsole.util.LoginManager;
 
 public class WSServer extends WebSocketServer {
@@ -50,7 +50,7 @@ public class WSServer extends WebSocketServer {
 
 		if (cmd == null) {
 			//Command does not exist
-			sendToClient(conn, new UnknownWSCmd("Unknown command", message));
+			sendToClient(conn, new UnknownCommand("Unknown command", message));
 			Bukkit.getLogger().info(
 					"[WebConsole] Signal '" + message + "' was not processed since is not valid. Is your plugin/web interface up to date?");
 		} else if (!LoginManager.getInstance().isLoggedIn(conn.getRemoteSocketAddress())