package com.Acrobot.ChestShop;
import org.bukkit.Bukkit;
import org.bukkit.configuration.InvalidConfigurationException;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.PluginDescriptionFile;
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.Proxy;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.UUID;
import java.util.logging.Level;
public class Metrics {
/**
* The current revision number
*/
private final static int REVISION = 5;
/**
* The base url of the metrics domain
*/
private static final String BASE_URL = "http://mcstats.org";
/**
* The url used to report a server's status
*/
private static final String REPORT_URL = "/report/%s";
/**
* The file where guid and opt out is stored in
*/
private static final String CONFIG_FILE = "plugins/PluginMetrics/config.yml";
/**
* Interval of time to ping (in minutes)
*/
private final static int PING_INTERVAL = 10;
/**
* The plugin this metrics submits for
*/
private final Plugin plugin;
/**
* The plugin configuration file
*/
private final YamlConfiguration configuration;
/**
* The plugin configuration file
*/
private final File configurationFile;
/**
* Unique server id
*/
private final String guid;
/**
* Lock for synchronization
*/
private final Object optOutLock = new Object();
/**
* Id of the scheduled task
*/
private volatile int taskId = -1;
public Metrics(Plugin plugin) throws IOException {
if (plugin == null) {
throw new IllegalArgumentException("Plugin cannot be null");
}
this.plugin = plugin;
// load the config
configurationFile = new File(CONFIG_FILE);
configuration = YamlConfiguration.loadConfiguration(configurationFile);
// add some defaults
configuration.addDefault("opt-out", false);
configuration.addDefault("guid", UUID.randomUUID().toString());
// Do we need to create the file?
if (configuration.get("guid", null) == null) {
configuration.options().header("http://mcstats.org").copyDefaults(true);
configuration.save(configurationFile);
}
// Load the guid then
guid = configuration.getString("guid");
}
/**
* Start measuring statistics. This will immediately create an async repeating task as the plugin and send
* the initial data to the metrics backend, and then after that it will post in increments of
* PING_INTERVAL * 1200 ticks.
*
* @return True if statistics measuring is running, otherwise false.
*/
public boolean start() {
synchronized (optOutLock) {
// Did we opt out?
if (isOptOut()) {
return false;
}
// Is metrics already running?
if (taskId >= 0) {
return true;
}
// Begin hitting the server with glorious data
taskId = plugin.getServer().getScheduler().scheduleAsyncRepeatingTask(plugin, new Runnable() {
private boolean firstPost = true;
public void run() {
try {
// This has to be synchronized or it can collide with the disable method.
synchronized (optOutLock) {
// Disable Task, if it is running and the server owner decided to opt-out
if (isOptOut() && taskId > 0) {
plugin.getServer().getScheduler().cancelTask(taskId);
taskId = -1;
}
}
// We use the inverse of firstPost because if it is the first time we are posting,
// it is not a interval ping, so it evaluates to FALSE
// Each time thereafter it will evaluate to TRUE, i.e PING!
postPlugin(!firstPost);
// After the first post we set firstPost to false
// Each post thereafter will be a ping
firstPost = false;
} catch (IOException e) {
Bukkit.getLogger().log(Level.INFO, "[Metrics] {0}", e.getMessage());
}
}
}, 0, PING_INTERVAL * 1200);
return true;
}
}
/**
* Has the server owner denied plugin metrics?
*
* @return
*/
public boolean isOptOut() {
synchronized(optOutLock) {
try {
// Reload the metrics file
configuration.load(CONFIG_FILE);
} catch (IOException ex) {
Bukkit.getLogger().log(Level.INFO, "[Metrics] " + ex.getMessage());
return true;
} catch (InvalidConfigurationException ex) {
Bukkit.getLogger().log(Level.INFO, "[Metrics] " + ex.getMessage());
return true;
}
return configuration.getBoolean("opt-out", false);
}
}
/**
* Enables metrics for the server by setting "opt-out" to false in the config file and starting the metrics task.
*
* @throws IOException
*/
public void enable() throws IOException {
// This has to be synchronized or it can collide with the check in the task.
synchronized (optOutLock) {
// Check if the server owner has already set opt-out, if not, set it.
if (isOptOut()) {
configuration.set("opt-out", false);
configuration.save(configurationFile);
}
// Enable Task, if it is not running
if (taskId < 0) {
start();
}
}
}
/**
* Disables metrics for the server by setting "opt-out" to true in the config file and canceling the metrics task.
*
* @throws IOException
*/
public void disable() throws IOException {
// This has to be synchronized or it can collide with the check in the task.
synchronized (optOutLock) {
// Check if the server owner has already set opt-out, if not, set it.
if (!isOptOut()) {
configuration.set("opt-out", true);
configuration.save(configurationFile);
}
// Disable Task, if it is running
if (taskId > 0) {
this.plugin.getServer().getScheduler().cancelTask(taskId);
taskId = -1;
}
}
}
/**
* Generic method that posts a plugin to the metrics website
*/
private void postPlugin(boolean isPing) throws IOException {
// The plugin's description file containg all of the plugin data such as name, version, author, etc
final PluginDescriptionFile description = plugin.getDescription();
// Construct the post data
final StringBuilder data = new StringBuilder(100);
data.append(encode("guid")).append('=').append(encode(guid));
encodeDataPair(data, "version", description.getVersion());
encodeDataPair(data, "server", Bukkit.getVersion());
encodeDataPair(data, "players", Integer.toString(Bukkit.getServer().getOnlinePlayers().length));
encodeDataPair(data, "revision", String.valueOf(REVISION));
// If we're pinging, append it
if (isPing) {
encodeDataPair(data, "ping", "true");
}
// Create the url
URL url = new URL(BASE_URL + String.format(REPORT_URL, encode(plugin.getDescription().getName())));
// Connect to the website
URLConnection connection;
// Mineshafter creates a socks proxy, so we can safely bypass it
// It does not reroute POST requests so we need to go around it
if (isMineshafterPresent()) {
connection = url.openConnection(Proxy.NO_PROXY);
} else {
connection = url.openConnection();
}
connection.setDoOutput(true);
// Write the data
final OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
writer.write(data.toString());
writer.flush();
// Now read the response
final BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
final String response = reader.readLine();
// close resources
writer.close();
reader.close();
if (response == null || response.startsWith("ERR")) {
throw new IOException(response); //Throw the exception
}
//if (response.startsWith("OK")) - We should get "OK" followed by an optional description if everything goes right
}
/**
* Check if mineshafter is present. If it is, we need to bypass it to send POST requests
*
* @return
*/
private static boolean isMineshafterPresent() {
try {
Class.forName("mineshafter.MineServer");
return true;
} catch (Exception e) {
return false;
}
}
/**
* Encode a key/value data pair to be used in a HTTP post request. This INCLUDES a & so the first
* key/value pair MUST be included manually, e.g:
*
* StringBuffer data = new StringBuffer();
* data.append(encode("guid")).append('=').append(encode(guid));
* encodeDataPair(data, "version", description.getVersion());
*
*
* @param buffer
* @param key
* @param value
* @return
*/
private static void encodeDataPair(final StringBuilder buffer, final String key, final String value) throws UnsupportedEncodingException {
buffer.append('&').append(encode(key)).append('=').append(encode(value));
}
/**
* Encode text as UTF-8
*
* @param text
* @return
*/
private static String encode(String text) throws UnsupportedEncodingException {
return URLEncoder.encode(text, "UTF-8");
}
}