146 lines
4.5 KiB
Java
146 lines
4.5 KiB
Java
package cn.serendipityr.EndMinecraftPlusV2.VersionControl.NewVersion.ForgeProtocol;
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import cn.serendipityr.EndMinecraftPlusV2.Tools.LogUtil;
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import com.google.gson.Gson;
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import java.io.ByteArrayOutputStream;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.net.InetSocketAddress;
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import java.net.Socket;
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import java.util.HashMap;
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import java.util.Map;
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public class MCForgeMOTD {
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public Map<String, String> pingGetModsList(String ip, int port, int version) {
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Map<String, String> modList = new HashMap<String, String>();
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Socket socket = new Socket();
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try {
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socket.connect(new InetSocketAddress(ip, port));
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if(socket.isConnected()) {
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DataOutputStream out = new DataOutputStream(socket.getOutputStream());
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ByteArrayOutputStream packet = new ByteArrayOutputStream();
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DataOutputStream packetOut = new DataOutputStream(packet);
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packetOut.writeByte(0); // handshake packet id
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writeVarInt(packetOut, version); // version
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writeVarInt(packetOut, ip.length()); // host length
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packetOut.writeBytes(ip); // host
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packetOut.writeShort(port); // port
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writeVarInt(packetOut, 1); // next to status
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writeVarInt(out, packet.size()); // packet length
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out.write(packet.toByteArray()); // handshake packet
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out.writeByte(1); // packet length
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out.writeByte(0); // status packet id
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out.flush();
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DataInputStream in = new DataInputStream(socket.getInputStream());
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readVarInt(in); // packet length
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int packetID = readVarInt(in);
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int dataLength = readVarInt(in);
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if (packetID == 0 && dataLength > 0) { // Response
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byte[] responseData = new byte[dataLength];
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in.readFully(responseData);
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Response response = new Gson().fromJson(new String(responseData), Response.class);
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if (response.modinfo != null) {
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for (Response.ModInfo.ModID modid : response.modinfo.modList) {
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modList.put(modid.modid, modid.version);
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LogUtil.doLog(0, modid.modid + " | " + modid.version, "[Debug]");
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}
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}
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}
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}
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} catch (Exception e) {
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LogUtil.doLog(1, "获取服务器上的Forge Mods时发生错误。详细信息: " + e.getMessage(), null);
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try {
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if (socket.isConnected())
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socket.close();
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} catch (IOException ignored) {}
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}
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return modList;
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}
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/**
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* @author thinkofdeath
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* See: https://gist.github.com/thinkofdeath/e975ddee04e9c87faf22
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*/
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public int readVarInt(DataInputStream in) throws IOException {
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int i = 0;
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int j = 0;
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while (true) {
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int k = in.readByte();
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i |= (k & 0x7F) << j++ * 7;
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if (j > 5)
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throw new RuntimeException("VarInt too big");
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if ((k & 0x80) != 128)
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break;
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}
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return i;
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}
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/**
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* @throws IOException
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* @author thinkofdeath
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* See: https://gist.github.com/thinkofdeath/e975ddee04e9c87faf22
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*/
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public void writeVarInt(DataOutputStream out, int paramInt) throws IOException {
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while (true) {
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if ((paramInt & 0xFFFFFF80) == 0) {
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out.writeByte(paramInt);
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return;
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}
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out.writeByte(paramInt & 0x7F | 0x80);
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paramInt >>>= 7;
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}
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}
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class Response {
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public Object description;
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public Players players;
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public Version version;
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public ModInfo modinfo;
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class Description {
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public String text;
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public String translate;
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public String getDescription() {
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return text != null ? text : translate;
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}
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}
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class Players {
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public int max;
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public int online;
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}
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class Version {
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public String name;
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public int protocol;
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}
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class ModInfo {
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public String type;
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public ModID[] modList;
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class ModID {
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public String modid;
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public String version;
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}
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}
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}
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}
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