package com.plotsquared.bukkit.util;
import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.scheduler.BukkitTask;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Collection;
import java.util.UUID;
import java.util.zip.GZIPOutputStream;
public class Metrics {
/** The current revision number. */
private static final int REVISION = 7;
/** The base url of the metrics domain.*/
private static final String BASE_URL = "http://report.mcstats.org";
/** The url used to report a server's status. */
private static final String REPORT_URL = "/plugin/%s";
/** Interval of time to ping (in minutes). */
private static final int PING_INTERVAL = 15;
/** The plugin this metrics submits for. */
private final Plugin plugin;
/** Unique server id. */
private final String guid;
/** The scheduled task. */
private volatile BukkitTask task = null;
public Metrics(Plugin plugin) {
this.plugin = plugin;
this.guid = UUID.randomUUID().toString();
}
/**
* GZip compress a string of bytes.
*
* @param input
*
* @return byte[] the file as a byte array
*/
public static byte[] gzip(String input) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
GZIPOutputStream gzos = null;
try {
gzos = new GZIPOutputStream(baos);
gzos.write(input.getBytes("UTF-8"));
} catch (IOException e) {
e.printStackTrace();
} finally {
if (gzos != null) {
try {
gzos.close();
} catch (IOException ignore) {}
}
}
return baos.toByteArray();
}
/**
* Appends a json encoded key/value pair to the given string builder.
*
* @param json
* @param key
* @param value
*
*/
private static void appendJSONPair(StringBuilder json, String key, String value) {
boolean isValueNumeric = false;
try {
if (value.equals("0") || !value.endsWith("0")) {
Double.parseDouble(value);
isValueNumeric = true;
}
} catch (NumberFormatException ignored) {
isValueNumeric = false;
}
if (json.charAt(json.length() - 1) != '{') {
json.append(',');
}
json.append(escapeJSON(key));
json.append(':');
if (isValueNumeric) {
json.append(value);
} else {
json.append(escapeJSON(value));
}
}
/**
* Escape a string to create a valid JSON string
*
* @param text
*
* @return String
*/
private static String escapeJSON(String text) {
StringBuilder builder = new StringBuilder();
builder.append('"');
for (int index = 0; index < text.length(); index++) {
char chr = text.charAt(index);
switch (chr) {
case '"':
case '\\':
builder.append('\\');
builder.append(chr);
break;
case '\b':
builder.append("\\b");
break;
case '\t':
builder.append("\\t");
break;
case '\n':
builder.append("\\n");
break;
case '\r':
builder.append("\\r");
break;
default:
if (chr < ' ') {
String t = "000" + Integer.toHexString(chr);
builder.append("\\u" + t.substring(t.length() - 4));
} else {
builder.append(chr);
}
break;
}
}
builder.append('"');
return builder.toString();
}
/**
* Encode text as UTF-8
*
* @param text the text to encode
*
* @return the encoded text, as UTF-8
*/
private static String urlEncode(String text) throws UnsupportedEncodingException {
return URLEncoder.encode(text, "UTF-8");
}
/**
* 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() {
// Is metrics already running?
if (this.task != null) {
return true;
}
// Begin hitting the server with glorious data
this.task = this.plugin.getServer().getScheduler().runTaskTimerAsynchronously(this.plugin, new Runnable() {
private boolean firstPost = true;
@Override
public void run() {
try {
postPlugin(!this.firstPost);
// After the first post we set firstPost to
// false
// Each post thereafter will be a ping
this.firstPost = false;
} catch (IOException e) {
e.printStackTrace();
}
}
}, 0, PING_INTERVAL * 1200);
return true;
}
/**
* Generic method that posts a plugin to the metrics website.
*/
private void postPlugin(boolean isPing) throws IOException {
// Server software specific section
PluginDescriptionFile description = this.plugin.getDescription();
String pluginName = description.getName();
boolean onlineMode = Bukkit.getServer().getOnlineMode(); // TRUE if online mode is enabled
String pluginVersion = description.getVersion();
String serverVersion = Bukkit.getVersion();
int playersOnline = 0;
try {
if (Bukkit.class.getMethod("getOnlinePlayers", new Class<?>[0]).getReturnType() == Collection.class) {
playersOnline = ((Collection<?>) Bukkit.class.getMethod("getOnlinePlayers", new Class<?>[0]).invoke(null)).size();
} else {
playersOnline = ((Player[]) Bukkit.class.getMethod("getOnlinePlayers", new Class<?>[0]).invoke(null)).length;
}
} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException ex) {
ex.printStackTrace();
}
// END server software specific section -- all code below does not use
// any code outside of this class / Java
// Construct the post data
StringBuilder json = new StringBuilder(1024);
json.append('{');
// The plugin's description file containing all of the plugin data such as name, version, author, etc
appendJSONPair(json, "guid", this.guid);
appendJSONPair(json, "plugin_version", pluginVersion);
appendJSONPair(json, "server_version", serverVersion);
appendJSONPair(json, "players_online", Integer.toString(playersOnline));
// New data as of R6
String osname = System.getProperty("os.name");
String osarch = System.getProperty("os.arch");
String osversion = System.getProperty("os.version");
String java_version = System.getProperty("java.version");
int coreCount = Runtime.getRuntime().availableProcessors();
// normalize os arch .. amd64 -> x86_64
if (osarch.equals("amd64")) {
osarch = "x86_64";
}
appendJSONPair(json, "osname", osname);
appendJSONPair(json, "osarch", osarch);
appendJSONPair(json, "osversion", osversion);
appendJSONPair(json, "cores", Integer.toString(coreCount));
appendJSONPair(json, "auth_mode", onlineMode ? "1" : "0");
appendJSONPair(json, "java_version", java_version);
// If we're pinging, append it
if (isPing) {
appendJSONPair(json, "ping", "1");
}
// close json
json.append('}');
// Create the url
URL url = new URL(BASE_URL + String.format(REPORT_URL, urlEncode(pluginName)));
// Connect to the website
URLConnection connection = url.openConnection();
byte[] uncompressed = json.toString().getBytes();
byte[] compressed = gzip(json.toString());
// Headers
connection.addRequestProperty("User-Agent", "MCStats/" + REVISION);
connection.addRequestProperty("Content-Type", "application/json");
connection.addRequestProperty("Content-Encoding", "gzip");
connection.addRequestProperty("Content-Length", Integer.toString(compressed.length));
connection.addRequestProperty("Accept", "application/json");
connection.addRequestProperty("Connection", "close");
connection.setDoOutput(true);
try {
try (OutputStream os = connection.getOutputStream()) {
os.write(compressed);
os.flush();
}
String response;
try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
response = reader.readLine();
}
if (response == null || response.startsWith("ERR") || response.startsWith("7")) {
if (response == null) {
response = "null";
} else if (response.startsWith("7")) {
response = response.substring(response.startsWith("7,") ? 2 : 1);
}
throw new IOException(response);
}
} catch (IOException ignored) {}
}
}