import java.io.File; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.lang.reflect.Field; import java.net.URL; import java.net.URLConnection; import java.net.URLEncoder; import java.util.Arrays; import joptsimple.ArgumentAcceptingOptionSpec; import joptsimple.OptionParser; import joptsimple.OptionSet; import net.minecraft.client.Minecraft; import net.minecraft.client.main.Main; public class Start { public static void main(String[] args) throws Exception { int userIndex = -1; int passIndex = -1; int sessIndex = -1; int versIndex = -1; for( int x = 0; x < args.length; x++) { if (args[x].equals("--username")) userIndex = x + 1; else if (args[x].equals("--password")) passIndex = x + 1; else if (args[x].equals("--session")) sessIndex = x + 1; else if (args[x].equals("--version")) versIndex = x + 1; } if (userIndex != 0-1 && passIndex != -1 && sessIndex == -1) { String[] session = getSession(args[userIndex], args[passIndex]); if (session != null) { args[userIndex] = session[0]; args = concat(args, new String[]{"--session", session[1]}); } } //Kill the password if its there so it isn't printed to the console. if (passIndex != -1) { args[passIndex-1] = "no_password_for_joo"; args[passIndex] = "no_password_for_joo"; } if (versIndex == -1) { args = concat(args, new String[]{ "--version", "fml_mcp" }); } Main.main(args); } private static String[] getSession(String username, String password) throws UnsupportedEncodingException { String parameters = "http://login.minecraft.net/?user=" + URLEncoder.encode(username, "UTF-8") + "&password=" + URLEncoder.encode(password, "UTF-8") + "&version=" + 13; String result = openUrl(parameters); if (result == null) { System.out.println("Can't connect to minecraft.net"); return null; } if (!result.contains(":")) { System.out.println("Login Failed: " + result); return null; } String[] values = result.split(":"); return new String[]{ values[2].trim(), values[3].trim() }; } private static String openUrl(String addr) { try { URL url = new URL(addr); java.io.InputStream is; is = url.openConnection().getInputStream(); java.io.BufferedReader reader = new java.io.BufferedReader(new java.io.InputStreamReader(is)); String buf = ""; String line = null; while ((line = reader.readLine()) != null) { buf += "\n" + line; } reader.close(); return buf; } catch (IOException e) { e.printStackTrace(); } return null; } private static T[] concat(T[] first, T[] second) { T[] result = Arrays.copyOf(first, first.length + second.length); System.arraycopy(second, 0, result, first.length, second.length); return result; } }