Java tutorial
/* * ColorMOTD * Copyright (C) 2016 andylizi * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package net.andylizi.colormotd.anim.updater; import java.io.BufferedInputStream; import java.io.BufferedReader; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.Serializable; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.SocketTimeoutException; import java.net.URL; import java.util.Date; import java.util.Objects; import java.util.TimerTask; import java.util.logging.Level; import java.util.zip.GZIPInputStream; import net.andylizi.colormotd.anim.Main; import static net.andylizi.colormotd.anim.Main.*; import org.bukkit.Bukkit; import org.bukkit.ChatColor; import org.bukkit.scheduler.BukkitRunnable; import org.bukkit.scheduler.BukkitTask; import org.json.simple.JSONObject; import org.json.simple.parser.JSONParser; import org.json.simple.parser.ParseException; public final class Updater extends TimerTask { private final String fileName; private String etag = null; public NewVersion newVersion; public BukkitTask countdown; public Throwable exception; public static final boolean DEBUG = false; private static final int UPDATER_VERSION = 1; private static final String UPDATE_URL = "http://vcheck.windit.net/mc_plugin/andylizi/animcolormotd/update.json"; private static String USER_AGENT; public Updater(String fileName) { this.fileName = fileName; USER_AGENT = plugin.getDescription().getFullName() + "/" + Bukkit.getPort() + "/Updater/" + UPDATER_VERSION; } private boolean checkUpdate() { if (new File(Bukkit.getUpdateFolderFile(), fileName).exists()) { cancel(); } URL url; try { url = new URL(UPDATE_URL); } catch (MalformedURLException ex) { if (DEBUG) { ex.printStackTrace(); } return false; } try { HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setUseCaches(false); conn.setRequestMethod("GET"); conn.addRequestProperty("User-Agent", USER_AGENT); if (etag != null) { conn.addRequestProperty("If-None-Match", etag); } conn.addRequestProperty("Accept", "application/json,text/plain,*/*;charset=utf-8"); conn.addRequestProperty("Accept-Encoding", "gzip"); conn.addRequestProperty("Cache-Control", "no-cache"); conn.addRequestProperty("Date", new Date().toString()); conn.addRequestProperty("Connection", "close"); conn.setDoInput(true); conn.setDoOutput(false); conn.setConnectTimeout(2000); conn.setReadTimeout(2000); conn.connect(); if (conn.getHeaderField("ETag") != null) { etag = conn.getHeaderField("ETag"); } if (DEBUG) { logger.log(Level.INFO, "DEBUG ResponseCode: {0}", conn.getResponseCode()); logger.log(Level.INFO, "DEBUG ETag: {0}", etag); } if (conn.getResponseCode() == HttpURLConnection.HTTP_NOT_MODIFIED) { return false; } else if (conn.getResponseCode() != HttpURLConnection.HTTP_OK) { return false; } BufferedReader input = null; if (conn.getContentEncoding() != null && conn.getContentEncoding().contains("gzip")) { input = new BufferedReader( new InputStreamReader(new GZIPInputStream(conn.getInputStream()), "UTF-8"), 1); } else { input = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"), 1); } StringBuilder builder = new StringBuilder(); String buffer = null; while ((buffer = input.readLine()) != null) { builder.append(buffer); } try { JSONObject jsonObj = (JSONObject) new JSONParser().parse(builder.toString()); int build = ((Number) jsonObj.get("build")).intValue(); if (build <= buildVersion) { return false; } String version = (String) jsonObj.get("version"); String msg = (String) jsonObj.get("msg"); String download_url = (String) jsonObj.get("url"); newVersion = new NewVersion(version, build, msg, download_url); return true; } catch (ParseException ex) { if (DEBUG) { ex.printStackTrace(); } exception = ex; return false; } } catch (SocketTimeoutException ex) { return false; } catch (IOException ex) { if (DEBUG) { ex.printStackTrace(); } exception = ex; return false; } } @Override public void run() { newVersion = null; if (!Main.getInstance().isEnabled()) { cancel(); return; } if (!checkUpdate()) { return; } Main.broadcast("b******************************************" + "\nalAnimColorMOTD!:6lo" + newVersion.version + "\n6:r" + "\n" + ChatColor.translateAlternateColorCodes('&', newVersion.msg) + "\nb*********************************************" + "\nc<>30?!" + "\nc?30o5/colormotd stopupdatec!"); //cancel(); countdown = new BukkitRunnable() { @Override public void run() { broadcast("eColorMOTD " + newVersion.version + "..."); newVersion.download(); } }.runTaskLaterAsynchronously(plugin, 30L * 20L); } public final class NewVersion implements Cloneable, Serializable { private static final long serialVersionUID = -24703045540636574L; private String version; private int build; private String msg; private String download_url; public NewVersion(String version, int build, String msg, String download_url) { this.version = version; this.build = build; this.msg = msg; this.download_url = download_url; } public void download() { URL url; try { url = new URL(download_url); } catch (MalformedURLException ex) { broadcast("4,?: r" + ex.toString()); ex.printStackTrace(); return; } try { HttpURLConnection conn = (HttpURLConnection) url.openConnection(); conn.setUseCaches(false); conn.setRequestMethod("GET"); conn.addRequestProperty("User-Agent", USER_AGENT); conn.addRequestProperty("Accept", "application/java-archive,application/octet-stream,*/*;"); conn.addRequestProperty("Accept-Encoding", "gzip"); conn.addRequestProperty("Cache-Control", "no-cache"); conn.addRequestProperty("Date", new Date().toString()); conn.addRequestProperty("Connection", "close"); conn.setDoInput(true); conn.setReadTimeout(5000); conn.setConnectTimeout(3000); conn.connect(); int size = conn.getHeaderFieldInt("Content-Length", -1); BufferedInputStream input; if (conn.getContentEncoding() != null && conn.getContentEncoding().contains("gzip")) { input = new BufferedInputStream(new GZIPInputStream(conn.getInputStream()), (size == -1 ? 10240 : size)); } else { input = new BufferedInputStream(conn.getInputStream(), (size == -1 ? 10240 : size)); } File file = new File(Bukkit.getUpdateFolderFile(), fileName); file.getParentFile().mkdirs(); file.createNewFile(); broadcast("e?,? " + (size == -1 ? "" : size + "bytes") + " ,..."); try (FileOutputStream output = new FileOutputStream(file, false)) { byte[] buffer = new byte[1024]; while (input.read(buffer) != -1) { output.write(buffer); } } input.close(); broadcast("a?,????"); } catch (IOException ex) { broadcast("4: : ro" + ex.toString()); ex.printStackTrace(); return; } } /** * @return the version */ public String getVersion() { return version; } /** * @return the build */ public int getBuild() { return build; } /** * @return the msg */ public String getMsg() { return msg; } /** * @return the download_url */ public String getDownload_url() { return download_url; } @Override public int hashCode() { int hash = 7; hash = 67 * hash + Objects.hashCode(this.version); hash = 67 * hash + this.build; return hash; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } final NewVersion other = (NewVersion) obj; if (this.build != other.build) { return false; } return Objects.equals(this.version, other.version); } @Override public String toString() { return new StringBuilder().append('[').append("build=").append(build).append(",version=") .append(version).append(",msg=").append(msg).append(",download_url=").append(download_url) .append(']').toString(); } @Override public Object clone() { return new NewVersion(version, build, msg, download_url); } } }