MinecraftUtilities/Backend
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add server pinger
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Lee
2024-04-10 07:43:13 +01:00
parent ed3b7e3064
commit 25c69e11e1
38 changed files with 104 additions and 1299 deletions
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42
src/main/java/cc/fascinated/common/IPUtils.java
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@ -1,42 +0,0 @@
package cc.fascinated.common;
import jakarta.servlet.http.HttpServletRequest;
import lombok.experimental.UtilityClass;
@UtilityClass
public class IPUtils {
/**
* The headers that contain the IP.
*/
private static final String[] IP_HEADERS = new String[] {
"CF-Connecting-IP",
"X-Forwarded-For"
};
/**
* Get the real IP from the given request.
*
* @param request the request
* @return the real IP
*/
public static String getRealIp(HttpServletRequest request) {
String ip = request.getRemoteAddr();
for (String headerName : IP_HEADERS) {
String header = request.getHeader(headerName);
if (header == null) {
continue;
}
if (!header.contains(",")) { // Handle single IP
ip = header;
break;
}
// Handle multiple IPs
String[] ips = header.split(",");
for (String ipHeader : ips) {
ip = ipHeader;
break;
}
}
return ip;
}
}

72
src/main/java/cc/fascinated/common/PlayerUtils.java
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@ -1,72 +0,0 @@
package cc.fascinated.common;
import cc.fascinated.Main;
import cc.fascinated.model.player.Skin;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.SneakyThrows;
import lombok.experimental.UtilityClass;
import lombok.extern.log4j.Log4j2;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.net.URI;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
@UtilityClass @Log4j2
public class PlayerUtils {
/**
* Gets the skin data from the URL.
*
* @return the skin data
*/
@SneakyThrows
@JsonIgnore
public static BufferedImage getSkinImage(String url) {
HttpResponse<byte[]> response = Main.HTTP_CLIENT.send(HttpRequest.newBuilder(URI.create(url)).build(),
HttpResponse.BodyHandlers.ofByteArray());
byte[] body = response.body();
if (body == null) {
return null;
}
return ImageIO.read(new ByteArrayInputStream(body));
}
/**
* Gets the part data from the skin.
*
* @return the part data
*/
public static byte[] getSkinPartBytes(Skin skin, Skin.Parts part, int size) {
if (size == -1) {
size = part.getDefaultSize();
}
try {
BufferedImage image = skin.getSkinImage();
if (image == null) {
return null;
}
// Get the part of the image (e.g. the head)
BufferedImage partImage = image.getSubimage(part.getX(), part.getY(), part.getWidth(), part.getHeight());
// Scale the image
BufferedImage scaledImage = new BufferedImage(size, size, partImage.getType());
Graphics2D graphics2D = scaledImage.createGraphics();
graphics2D.drawImage(partImage, 0, 0, size, size, null);
graphics2D.dispose();
partImage = scaledImage;
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(partImage, "png", byteArrayOutputStream);
return byteArrayOutputStream.toByteArray();
} catch (Exception ex) {
log.error("Failed to get {} part bytes for {}", part.name(), skin.getUrl(), ex);
return null;
}
}
}

18
src/main/java/cc/fascinated/common/Tuple.java
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@ -1,18 +0,0 @@
package cc.fascinated.common;
import lombok.AllArgsConstructor;
import lombok.Getter;
@Getter @AllArgsConstructor
public class Tuple<L, R> {
/**
* The left value of the tuple.
*/
private final L left;
/**
* The right value of the tuple.
*/
private final R right;
}

22
src/main/java/cc/fascinated/common/UUIDUtils.java
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@ -1,22 +0,0 @@
package cc.fascinated.common;
import lombok.experimental.UtilityClass;
@UtilityClass
public class UUIDUtils {
/**
* Add dashes to a UUID.
*
* @param idNoDashes the UUID without dashes
* @return the UUID with dashes
*/
public static String addUuidDashes(String idNoDashes) {
StringBuilder idBuff = new StringBuilder(idNoDashes);
idBuff.insert(20, '-');
idBuff.insert(16, '-');
idBuff.insert(12, '-');
idBuff.insert(8, '-');
return idBuff.toString();
}
}

41
src/main/java/cc/fascinated/common/WebRequest.java
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@ -1,41 +0,0 @@
package cc.fascinated.common;
import lombok.experimental.UtilityClass;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.RestClient;
@UtilityClass
public class WebRequest {
/**
* The web client.
*/
private static final RestClient CLIENT = RestClient.builder()
.requestFactory(new HttpComponentsClientHttpRequestFactory())
.build();
/**
* Gets a response from the given URL.
*
* @param url the url
* @return the response
* @param <T> the type of the response
*/
public static <T> T getAsEntity(String url, Class<T> clazz) {
try {
ResponseEntity<T> profile = CLIENT.get()
.uri(url)
.retrieve()
.toEntity(clazz);
if (profile.getStatusCode().isError()) {
return null;
}
return profile.getBody();
} catch (HttpClientErrorException ex) {
return null;
}
}
}

66
src/main/java/cc/fascinated/common/packet/MinecraftJavaPacket.java
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@ -1,66 +0,0 @@
package cc.fascinated.common.packet;
import lombok.NonNull;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* Represents a packet in the
* Minecraft Java protocol.
*
* @author Braydon
* @see <a href="https://wiki.vg/Protocol">Protocol Docs</a>
*/
public abstract class MinecraftJavaPacket {
/**
* Process this packet.
*
* @param inputStream the input stream to read from
* @param outputStream the output stream to write to
* @throws IOException if an I/O error occurs
*/
public abstract void process(@NonNull DataInputStream inputStream, @NonNull DataOutputStream outputStream) throws IOException;
/**
* Write a variable integer to the output stream.
*
* @param outputStream the output stream to write to
* @param paramInt the integer to write
* @throws IOException if an I/O error occurs
*/
protected final void writeVarInt(DataOutputStream outputStream, int paramInt) throws IOException {
while (true) {
if ((paramInt & 0xFFFFFF80) == 0) {
outputStream.writeByte(paramInt);
return;
}
outputStream.writeByte(paramInt & 0x7F | 0x80);
paramInt >>>= 7;
}
}
/**
* Read a variable integer from the input stream.
*
* @param inputStream the input stream to read from
* @return the integer that was read
* @throws IOException if an I/O error occurs
*/
protected final int readVarInt(@NonNull DataInputStream inputStream) throws IOException {
int i = 0;
int j = 0;
while (true) {
int k = inputStream.readByte();
i |= (k & 0x7F) << j++ * 7;
if (j > 5) {
throw new RuntimeException("VarInt too big");
}
if ((k & 0x80) != 128) {
break;
}
}
return i;
}
}

64
src/main/java/cc/fascinated/common/packet/impl/java/JavaPacketHandshakingInSetProtocol.java
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@ -1,64 +0,0 @@
package cc.fascinated.common.packet.impl.java;
import cc.fascinated.common.packet.MinecraftJavaPacket;
import lombok.AllArgsConstructor;
import lombok.NonNull;
import lombok.ToString;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* This packet is sent by the client to the server to set
* the hostname, port, and protocol version of the client.
*
* @author Braydon
* @see <a href="https://wiki.vg/Protocol#Handshake">Protocol Docs</a>
*/
@AllArgsConstructor @ToString
public final class JavaPacketHandshakingInSetProtocol extends MinecraftJavaPacket {
private static final byte ID = 0x00; // The ID of the packet
private static final int STATUS_HANDSHAKE = 1; // The status handshake ID
/**
* The hostname of the server.
*/
@NonNull private final String hostname;
/**
* The port of the server.
*/
private final int port;
/**
* The protocol version of the server.
*/
private final int protocolVersion;
/**
* Process this packet.
*
* @param inputStream the input stream to read from
* @param outputStream the output stream to write to
* @throws IOException if an I/O error occurs
*/
@Override
public void process(@NonNull DataInputStream inputStream, @NonNull DataOutputStream outputStream) throws IOException {
try (ByteArrayOutputStream handshakeBytes = new ByteArrayOutputStream();
DataOutputStream handshake = new DataOutputStream(handshakeBytes)
) {
handshake.writeByte(ID); // Write the ID of the packet
writeVarInt(handshake, protocolVersion); // Write the protocol version
writeVarInt(handshake, hostname.length()); // Write the length of the hostname
handshake.writeBytes(hostname); // Write the hostname
handshake.writeShort(port); // Write the port
writeVarInt(handshake, STATUS_HANDSHAKE); // Write the status handshake ID
// Write the handshake bytes to the output stream
writeVarInt(outputStream, handshakeBytes.size());
outputStream.write(handshakeBytes.toByteArray());
}
}
}

62
src/main/java/cc/fascinated/common/packet/impl/java/JavaPacketStatusInStart.java
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@ -1,62 +0,0 @@
package cc.fascinated.common.packet.impl.java;
import cc.fascinated.common.packet.MinecraftJavaPacket;
import lombok.Getter;
import lombok.NonNull;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/**
* This packet is sent by the client to the server to request the
* status of the server. The server will respond with a json object
* containing the server's status.
*
* @author Braydon
* @see <a href="https://wiki.vg/Protocol#Status_Request">Protocol Docs</a>
*/
@Getter
public final class JavaPacketStatusInStart extends MinecraftJavaPacket {
private static final byte ID = 0x00; // The ID of the packet
/**
* The response json from the server, null if none.
*/
private String response;
/**
* Process this packet.
*
* @param inputStream the input stream to read from
* @param outputStream the output stream to write to
* @throws IOException if an I/O error occurs
*/
@Override
public void process(@NonNull DataInputStream inputStream, @NonNull DataOutputStream outputStream) throws IOException {
// Send the status request
outputStream.writeByte(0x01); // Size of packet
outputStream.writeByte(ID);
// Read the status response
readVarInt(inputStream); // Size of the response
int id = readVarInt(inputStream);
if (id == -1) { // The stream was prematurely ended
throw new IOException("Server prematurely ended stream.");
} else if (id != ID) { // Invalid packet ID
throw new IOException("Server returned invalid packet ID.");
}
int length = readVarInt(inputStream); // Length of the response
if (length == -1) { // The stream was prematurely ended
throw new IOException("Server prematurely ended stream.");
} else if (length == 0) {
throw new IOException("Server returned unexpected value.");
}
// Get the json response
byte[] data = new byte[length];
inputStream.readFully(data);
response = new String(data);
}
}