/*
* Copyright 2011-2013 Tyler Blair. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and contributors and should not be interpreted as representing official policies,
* either expressed or implied, of anybody else.
*/
package com.sk89q.craftbook.bukkit;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.Proxy;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.UUID;
import java.util.logging.Level;
import java.util.zip.GZIPOutputStream;
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 org.bukkit.scheduler.BukkitTask;
public class Metrics {
/**
* The current revision number
*/
private final static 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;
/**
* All of the custom graphs to submit to metrics
*/
private final Set<Graph> graphs = Collections.synchronizedSet(new HashSet<Graph>());
/**
* The plugin configuration file
*/
private final YamlConfiguration configuration;
/**
* The plugin configuration file
*/
private final File configurationFile;
/**
* Unique server id
*/
private final String guid;
/**
* Debug mode
*/
private final boolean debug;
/**
* Lock for synchronization
*/
private final Object optOutLock = new Object();
/**
* The scheduled task
*/
private volatile BukkitTask task = null;
public Metrics(final Plugin plugin) throws IOException {
if (plugin == null) {
throw new IllegalArgumentException("Plugin cannot be null");
}
this.plugin = plugin;
// load the config
configurationFile = getConfigFile();
configuration = YamlConfiguration.loadConfiguration(configurationFile);
// add some defaults
configuration.addDefault("opt-out", false);
configuration.addDefault("guid", UUID.randomUUID().toString());
configuration.addDefault("debug", false);
// 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");
debug = configuration.getBoolean("debug", false);
}
/**
* Construct and create a Graph that can be used to separate specific plotters to their own graphs on the metrics
* website. Plotters can be added to the graph object returned.
*
* @param name The name of the graph
* @return Graph object created. Will never return NULL under normal circumstances unless bad parameters are given
*/
public Graph createGraph(final String name) {
if (name == null) {
throw new IllegalArgumentException("Graph name cannot be null");
}
// Construct the graph object
final Graph graph = new Graph(name);
// Now we can add our graph
graphs.add(graph);
// and return back
return graph;
}
/**
* Add a Graph object to BukkitMetrics that represents data for the plugin that should be sent to the backend
*
* @param graph The name of the graph
*/
public void addGraph(final Graph graph) {
if (graph == null) {
throw new IllegalArgumentException("Graph cannot be null");
}
graphs.add(graph);
}
/**
* 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 (task != null) {
return true;
}
// Begin hitting the server with glorious data
task = plugin.getServer().getScheduler().runTaskTimerAsynchronously(plugin, new Runnable() {
private boolean firstPost = true;
@Override
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() && task != null) {
task.cancel();
task = null;
// Tell all plotters to stop gathering information.
for (Graph graph : graphs) {
graph.onOptOut();
}
}
}
// 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) {
if (debug) {
Bukkit.getLogger().log(Level.INFO, "[Metrics] " + e.getMessage());
}
}
}
}, 0, PING_INTERVAL * 1200);
return true;
}
}
/**
* Has the server owner denied plugin metrics?
*
* @return true if metrics should be opted out of it
*/
public boolean isOptOut() {
synchronized (optOutLock) {
try {
// Reload the metrics file
configuration.load(getConfigFile());
} catch (IOException ex) {
if (debug) {
Bukkit.getLogger().log(Level.INFO, "[Metrics] " + ex.getMessage());
}
return true;
} catch (InvalidConfigurationException ex) {
if (debug) {
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 java.io.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 (task == null) {
start();
}
}
}
/**
* Disables metrics for the server by setting "opt-out" to true in the config file and canceling the metrics task.
*
* @throws java.io.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 (task != null) {
task.cancel();
task = null;
}
}
}
/**
* Gets the File object of the config file that should be used to store data such as the GUID and opt-out status
*
* @return the File object for the config file
*/
public File getConfigFile() {
// I believe the easiest way to get the base folder (e.g craftbukkit set via -P) for plugins to use
// is to abuse the plugin object we already have
// plugin.getDataFolder() => base/plugins/PluginA/
// pluginsFolder => base/plugins/
// The base is not necessarily relative to the startup directory.
File pluginsFolder = plugin.getDataFolder().getParentFile();
// return => base/plugins/PluginMetrics/config.yml
return new File(new File(pluginsFolder, "PluginMetrics"), "config.yml");
}
/**
* Generic method that posts a plugin to the metrics website
*/
private void postPlugin(final boolean isPing) throws IOException {
// Server software specific section
PluginDescriptionFile description = 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 = Bukkit.getServer().getOnlinePlayers().size();
// 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 containg all of the plugin data such as name, version, author, etc
appendJSONPair(json, "guid", 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");
}
if (graphs.size() > 0) {
synchronized (graphs) {
json.append(',');
json.append('"');
json.append("graphs");
json.append('"');
json.append(':');
json.append('{');
boolean firstGraph = true;
for (Graph graph : graphs) {
StringBuilder graphJson = new StringBuilder();
graphJson.append('{');
for (Plotter plotter : graph.getPlotters()) {
appendJSONPair(graphJson, plotter.getColumnName(), Integer.toString(plotter.getValue()));
}
graphJson.append('}');
if (!firstGraph) {
json.append(',');
}
json.append(escapeJSON(graph.getName()));
json.append(':');
json.append(graphJson);
firstGraph = false;
}
json.append('}');
}
}
// 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;
// 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();
}
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);
if (debug) {
System.out.println("[Metrics] Prepared request for " + pluginName + " uncompressed=" + uncompressed.length + " compressed=" + compressed.length);
}
// Write the data
OutputStream os = connection.getOutputStream();
os.write(compressed);
os.flush();
// Now read the response
final BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String response = reader.readLine();
// close resources
os.close();
reader.close();
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);
} else {
// Is this the first update this hour?
if (response.equals("1") || response.contains("This is your first update this hour")) {
synchronized (graphs) {
for (Graph graph : graphs) {
for (Plotter plotter : graph.getPlotters()) {
plotter.reset();
}
}
}
}
}
}
/**
* GZip compress a string of bytes
*
* @param input
* @return
*/
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();
}
/**
* Check if mineshafter is present. If it is, we need to bypass it to send POST requests
*
* @return true if mineshafter is installed on the server
*/
private boolean isMineshafterPresent() {
try {
Class.forName("mineshafter.MineServer");
return true;
} catch (Exception e) {
return false;
}
}
/**
* Appends a json encoded key/value pair to the given string builder.
*
* @param json
* @param key
* @param value
* @throws UnsupportedEncodingException
*/
private static void appendJSONPair(StringBuilder json, String key, String value) throws UnsupportedEncodingException {
boolean isValueNumeric = false;
try {
if (value.equals("0") || !value.endsWith("0")) {
Double.parseDouble(value);
isValueNumeric = true;
}
} catch (NumberFormatException e) {
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
*/
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(final String text) throws UnsupportedEncodingException {
return URLEncoder.encode(text, "UTF-8");
}
/**
* Represents a custom graph on the website
*/
public static class Graph {
/**
* The graph's name, alphanumeric and spaces only :) If it does not comply to the above when submitted, it is
* rejected
*/
private final String name;
/**
* The set of plotters that are contained within this graph
*/
private final Set<Plotter> plotters = new LinkedHashSet<Plotter>();
private Graph(final String name) {
this.name = name;
}
/**
* Gets the graph's name
*
* @return the Graph's name
*/
public String getName() {
return name;
}
/**
* Add a plotter to the graph, which will be used to plot entries
*
* @param plotter the plotter to add to the graph
*/
public void addPlotter(final Plotter plotter) {
plotters.add(plotter);
}
/**
* Remove a plotter from the graph
*
* @param plotter the plotter to remove from the graph
*/
public void removePlotter(final Plotter plotter) {
plotters.remove(plotter);
}
/**
* Gets an <b>unmodifiable</b> set of the plotter objects in the graph
*
* @return an unmodifiable {@link java.util.Set} of the plotter objects
*/
public Set<Plotter> getPlotters() {
return Collections.unmodifiableSet(plotters);
}
@Override
public int hashCode() {
return name.hashCode();
}
@Override
public boolean equals(final Object object) {
if (!(object instanceof Graph)) {
return false;
}
final Graph graph = (Graph) object;
return graph.name.equals(name);
}
/**
* Called when the server owner decides to opt-out of BukkitMetrics while the server is running.
*/
protected void onOptOut() {
}
}
/**
* Interface used to collect custom data for a plugin
*/
public static abstract class Plotter {
/**
* The plot's name
*/
private final String name;
/**
* Construct a plotter with the default plot name
*/
public Plotter() {
this("Default");
}
/**
* Construct a plotter with a specific plot name
*
* @param name the name of the plotter to use, which will show up on the website
*/
public Plotter(final String name) {
this.name = name;
}
/**
* Get the current value for the plotted point. Since this function defers to an external function it may or may
* not return immediately thus cannot be guaranteed to be thread friendly or safe. This function can be called
* from any thread so care should be taken when accessing resources that need to be synchronized.
*
* @return the current value for the point to be plotted.
*/
public abstract int getValue();
/**
* Get the column name for the plotted point
*
* @return the plotted point's column name
*/
public String getColumnName() {
return name;
}
/**
* Called after the website graphs have been updated
*/
public void reset() {
}
@Override
public int hashCode() {
return getColumnName().hashCode();
}
@Override
public boolean equals(final Object object) {
if (!(object instanceof Plotter)) {
return false;
}
final Plotter plotter = (Plotter) object;
return plotter.name.equals(name) && plotter.getValue() == getValue();
}
}
}