feat: 新的MC信息获取代码

Signed-off-by: 502647092 <admin@yumc.pw>

src/main/java/pw/yumc/YumCore/mc/ServerInfo.java

@@ -1,24 +1,53 @@
 package pw.yumc.YumCore.mc;
 
+import java.io.ByteArrayOutputStream;
+import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.OutputStream;
 import java.net.InetSocketAddress;
 import java.net.Socket;
-import java.nio.charset.Charset;
+import java.util.regex.Pattern;
 
+import lombok.Data;
 import pw.yumc.YumCore.annotation.NotProguard;
 
 /**
  * Minecraft服务器数据获取类
- * 
+ *
  * @author 喵♂呜
  * @since 2017/1/26 0026
  */
+@Data
 @NotProguard
 public class ServerInfo {
+    private static byte PACKET_HANDSHAKE = 0x00, PACKET_STATUSREQUEST = 0x00, PACKET_PING = 0x01;
+    private static int PROTOCOL_VERSION = 4;
+    private static int STATUS_HANDSHAKE = 1;
+    private static Pattern pattern = Pattern.compile(".*\"description\":\"(.*)\".*");
+    /**
+     * {
+     * "version": {"name": "BungeeCord 1.8.x, 1.9.x, 1.10.x, 1.11.x", "protocol": 316},
+     * "players": {"max": 922, "online": 921},
+     * "description": {
+     * "extra": [
+     * {"color": "white", "text": "                       "},
+     * {"color": "aqua", "bold": true, "text": "梦世界 "},
+     * {"color": "red","bold": true, "obfuscated": true, "text": "|"},
+     * {"color": "white", "text": " "},
+     * {"color": "white", "bold": true, "text": "i5mc.com\n"},
+     * {"color": "white", "text": "       " },
+     * {"color": "yellow", "bold": true, "text": "★"},
+     * {"color": "red", "bold": true, "text": "1.8-1.11"},
+     * {"color": "yellow", "bold": true, "text": "★  ★"},
+     * {"color": "yellow", "text": "黄金周末"},
+     * {"color": "gray", "text": "-"},
+     * {"color": "green", "text": "空岛战争"},
+     * {"color": "red", "bold": true, "text": "双倍硬币"},
+     * {"color": "green", "text": "奖励"},
+     * {"color": "yellow", "bold": true, "text": "★"}
+     * ],"text": "" }
+     * }
+     */
     private String address = "localhost";
     private int port = 25565;
     private int timeout = 1500;
@@ -31,9 +60,9 @@ public class ServerInfo {
 
     /**
      * Minecraft服务器数据获取类
-     * 
+     *
      * @param address
-     *            服务器地址 默认端口25565
+     *         服务器地址 默认端口25565
      */
     public ServerInfo(String address) {
         this(address, 25565);
@@ -41,11 +70,11 @@ public class ServerInfo {
 
     /**
      * Minecraft服务器数据获取类
-     * 
+     *
      * @param address
-     *            服务器地址
+     *         服务器地址
      * @param port
-     *            服务器端口
+     *         服务器端口
      */
     public ServerInfo(String address, int port) {
         this.address = address;
@@ -54,68 +83,61 @@ public class ServerInfo {
 
     /**
      * 获取服务器数据
-     * 
+     *
      * @return 是否获取成功
      */
     public boolean fetchData() {
         try (Socket socket = new Socket()) {
-            OutputStream outputStream;
+            socket.connect(new InetSocketAddress(getAddress(), getPort()), getTimeout());
-            DataOutputStream dataOutputStream;
-            InputStream inputStream;
-            InputStreamReader inputStreamReader;
 
-            socket.setSoTimeout(this.timeout);
+            final DataInputStream in = new DataInputStream(socket.getInputStream());
+            final DataOutputStream out = new DataOutputStream(socket.getOutputStream());
 
-            socket.connect(new InetSocketAddress(this.getAddress(), this.getPort()), this.getTimeout());
+            //> Handshake
+            ByteArrayOutputStream handshake_bytes = new ByteArrayOutputStream();
+            DataOutputStream handshake = new DataOutputStream(handshake_bytes);
 
-            outputStream = socket.getOutputStream();
+            handshake.writeByte(PACKET_HANDSHAKE);
-            dataOutputStream = new DataOutputStream(outputStream);
+            writeVarInt(handshake, PROTOCOL_VERSION);
+            writeVarInt(handshake, getAddress().length());
+            handshake.writeBytes(getAddress());
+            handshake.writeShort(getPort());
+            writeVarInt(handshake, STATUS_HANDSHAKE);
 
-            inputStream = socket.getInputStream();
+            writeVarInt(out, handshake_bytes.size());
-            inputStreamReader = new InputStreamReader(inputStream, Charset.forName("UTF-16BE"));
+            out.write(handshake_bytes.toByteArray());
 
-            dataOutputStream.write(new byte[] { (byte) 0xFE, (byte) 0x01 });
+            //> Status request
 
-            int packetId = inputStream.read();
+            out.writeByte(0x01); // Size of packet
+            out.writeByte(PACKET_STATUSREQUEST);
 
-            if (packetId == -1) { throw new IOException("Premature end of stream."); }
+            //< Status response
 
-            if (packetId != 0xFF) { throw new IOException("Invalid packet ID (" + packetId + ")."); }
+            readVarInt(in); // Size
+            int id = readVarInt(in);
 
-            int length = inputStreamReader.read();
+            int length = readVarInt(in);
 
-            if (length == -1) { throw new IOException("Premature end of stream."); }
+            byte[] data = new byte[length];
+            in.readFully(data);
+            String json = new String(data, "UTF-8");
+            System.out.println(json);
+            //            //> Ping
+            //
+            //            out.writeByte(0x09); // Size of packet
+            //            out.writeByte(PACKET_PING);
+            //            out.writeLong(System.currentTimeMillis());
+            //
+            //            //< Ping
+            //            readVarInt(in); // Size
+            //            id = readVarInt(in);
 
-            if (length == 0) { throw new IOException("Invalid string length."); }
+            // Close
-
+            handshake.close();
-            char[] chars = new char[length];
+            handshake_bytes.close();
-
+            out.close();
-            if (inputStreamReader.read(chars, 0, length) != length) { throw new IOException("Premature end of stream."); }
+            in.close();
-
-            String string = new String(chars);
-
-            if (string.startsWith("§")) {
-                String[] data = string.split("\0");
-                this.pingVersion = Integer.parseInt(data[0].substring(1));
-                this.protocolVersion = Integer.parseInt(data[1]);
-                this.gameVersion = data[2];
-                this.motd = data[3];
-                this.playersOnline = Integer.parseInt(data[4]);
-                this.maxPlayers = Integer.parseInt(data[5]);
-            } else {
-                String[] data = string.split("§");
-                this.motd = data[0];
-                this.playersOnline = Integer.parseInt(data[1]);
-                this.maxPlayers = Integer.parseInt(data[2]);
-            }
-
-            dataOutputStream.close();
-            outputStream.close();
-
-            inputStreamReader.close();
-            inputStream.close();
-
-            socket.close();
         } catch (IOException exception) {
             gameVersion = "获取失败!";
             motd = "获取失败!";
@@ -124,44 +146,36 @@ public class ServerInfo {
         return true;
     }
 
-    public String getAddress() {
+    /**
-        return this.address;
+     * @author thinkofdeath
+     * See: https://gist.github.com/thinkofdeath/e975ddee04e9c87faf22
+     */
+    public int readVarInt(DataInputStream in) throws IOException {
+        int i = 0;
+        int j = 0;
+        while (true) {
+            int k = in.readByte();
+            i |= (k & 0x7F) << j++ * 7;
+            if (j > 5)
+                throw new RuntimeException("VarInt too big");
+            if ((k & 0x80) != 128)
+                break;
+        }
+        return i;
     }
 
-    public int getPort() {
+    /**
-        return this.port;
+     * @author thinkofdeath
+     * See: https://gist.github.com/thinkofdeath/e975ddee04e9c87faf22
+     */
+    public void writeVarInt(DataOutputStream out, int paramInt) throws IOException {
+        while (true) {
+            if ((paramInt & 0xFFFFFF80) == 0) {
+                out.writeByte(paramInt);
+                return;
+            }
+            out.writeByte(paramInt & 0x7F | 0x80);
+            paramInt >>>= 7;
+        }
     }
-
-    public void setTimeout(int timeout) {
-        this.timeout = timeout;
-    }
-
-    public int getTimeout() {
-        return this.timeout;
-    }
-
-    public int getPingVersion() {
-        return this.pingVersion;
-    }
-
-    public int getProtocolVersion() {
-        return this.protocolVersion;
-    }
-
-    public String getGameVersion() {
-        return this.gameVersion;
-    }
-
-    public String getMotd() {
-        return this.motd;
-    }
-
-    public int getPlayersOnline() {
-        return this.playersOnline;
-    }
-
-    public int getMaxPlayers() {
-        return this.maxPlayers;
-    }
-
 }

src/test/java/pw/yumc/YumCore/mc/ServerInfoTest.java

@@ -0,0 +1,20 @@
+package pw.yumc.YumCore.mc;
+
+
+import org.junit.Test;
+
+import lombok.val;
+
+/**
+ * Created with IntelliJ IDEA
+ *
+ * @author 喵♂呜
+ * Created on 2017/9/28 18:50.
+ */
+public class ServerInfoTest {
+    @Test
+    public void test() {
+        val info = new ServerInfo("play.i5mc.com");
+        info.fetchData();
+    }
+}