src/main/java/com/irtimaled/bbor/server/ServerRunner.java

   1 package com.irtimaled.bbor.server;
   2
   3 import net.minecraft.launchwrapper.Launch;
   4
   5 import java.io.File;
   6 import java.io.FileOutputStream;
   7 import java.io.IOException;
   8 import java.lang.reflect.Method;
   9 import java.net.MalformedURLException;
  10 import java.net.URL;
  11 import java.net.URLClassLoader;
  12 import java.nio.channels.Channels;
  13 import java.util.ArrayList;
  14 import java.util.HashMap;
  15 import java.util.List;
  16 import java.util.Map;
  17
  18 public class ServerRunner {
  19     private static final Map<String, String> VANILLA_SERVER_JARS = new HashMap<>();
  20
  21     private static final String[] LIBRARIES = {
  22             "https://github.com/irtimaled/Mixin/releases/download/org/spongepowered/mixin/0.7.11-SNAPSHOT/mixin-0.7.11-SNAPSHOT.jar",
  23             "https://repo1.maven.org/maven2/org/ow2/asm/asm/6.2/asm-6.2.jar",
  24             "https://repo1.maven.org/maven2/org/ow2/asm/asm-commons/6.2/asm-commons-6.2.jar",
  25             "https://repo1.maven.org/maven2/org/ow2/asm/asm-tree/6.2/asm-tree-6.2.jar",
  26             "https://libraries.minecraft.net/net/minecraft/launchwrapper/1.12/launchwrapper-1.12.jar"
  27     };
  28
  29     private static final ThrowableConsumer<URL> addURL;
  30
  31     static {
  32         VANILLA_SERVER_JARS.put("1.13.2", "https://launcher.mojang.com/v1/objects/3737db93722a9e39eeada7c27e7aca28b144ffa7/server.jar");
  33
  34         try {
  35             Method method = URLClassLoader.class
  36                     .getDeclaredMethod("addURL", URL.class);
  37             method.setAccessible(true);
  38             addURL = url -> method.invoke(ClassLoader.getSystemClassLoader(), url);
  39         } catch (ReflectiveOperationException e) {
  40             throw new AssertionError(e);
  41         }
  42     }
  43
  44     private static void addURLToClasspath(File file) throws MalformedURLException {
  45         addURL.accept(file.toURI().toURL());
  46     }
  47
  48     public static void run(String version, List<String> args) throws IOException {
  49         String serverJarUrl = VANILLA_SERVER_JARS.get(version);
  50
  51         addURLToClasspath(getOrDownload(new File("."), serverJarUrl));
  52         for (String url : LIBRARIES) {
  53             addURLToClasspath(getOrDownload(new File("libs"), url));
  54         }
  55
  56         args = new ArrayList<>(args);
  57         args.add("--tweakClass");
  58         args.add("com.irtimaled.bbor.launch.ServerTweaker");
  59
  60         System.out.println("Launching server...");
  61         Launch.main(args.toArray(new String[0]));
  62     }
  63
  64     private static File getOrDownload(File directory, String url) throws IOException {
  65         String fileName = url.substring(url.lastIndexOf('/') + 1);
  66         File target = new File(directory, fileName);
  67         if (target.isFile()) {
  68             return target;
  69         }
  70         target.getParentFile().mkdirs();
  71
  72         System.out.println("Downloading library: " + url);
  73         new FileOutputStream(target).getChannel()
  74                 .transferFrom(Channels.newChannel(new URL(url).openStream()), 0, Long.MAX_VALUE);
  75
  76         return target;
  77     }
  78 }