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feat: add initial server list ping implementation
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164 changes: 164 additions & 0 deletions
164
src/jvmMain/kotlin/net/kyori/adventure/webui/jvm/minimessage/SocketTest.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| package net.kyori.adventure.webui.jvm.minimessage | ||
|
|
||
| import io.ktor.network.selector.* | ||
| import io.ktor.network.sockets.* | ||
| import io.ktor.utils.io.* | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.launch | ||
| import kotlinx.coroutines.runBlocking | ||
| import kotlinx.coroutines.withContext | ||
| import net.kyori.adventure.text.minimessage.MiniMessage | ||
| import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer | ||
| import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer | ||
| import okhttp3.internal.and | ||
| import java.io.ByteArrayOutputStream | ||
| import java.io.DataOutputStream | ||
| import kotlin.text.Charsets.UTF_8 | ||
|
|
||
| public class SocketTest { | ||
|
|
||
| public fun main() { | ||
| // TODO | ||
| // 1. make this non blocking somehow, idk how kotlin works | ||
| // 2. add api/ui to store into some cache | ||
| // 3. parse server address to get stuff from the cache and return that in the status response | ||
| runBlocking { | ||
| val serverSocket = aSocket(SelectorManager(Dispatchers.IO)).tcp().bind("127.0.0.1", 9002) | ||
| println("Server is listening at ${serverSocket.localAddress}") | ||
| while (true) { | ||
| val socket = serverSocket.accept() | ||
| println("Accepted ${socket.remoteAddress}") | ||
| launch { | ||
| try { | ||
| val receiveChannel = socket.openReadChannel() | ||
| val sendChannel = socket.openWriteChannel(autoFlush = true) | ||
|
|
||
| // handshake | ||
| val handshakePacket = receiveChannel.readMcPacket() | ||
| val protocolVersion = handshakePacket.readVarInt() | ||
| val serverAddress = handshakePacket.readUtf8String() | ||
| val serverPort = handshakePacket.readShort() | ||
| val nextState = handshakePacket.readVarInt() | ||
|
|
||
| if (nextState != 1) { | ||
| // send kick | ||
| sendChannel.writeMcPacket(0) { | ||
| it.writeString( | ||
| GsonComponentSerializer.gson() | ||
| .serialize(MiniMessage.miniMessage().deserialize("<red>You cant join here!")) | ||
| ) | ||
| } | ||
| } else { | ||
| // send status response | ||
| sendChannel.writeMcPacket(0) { | ||
| it.writeString( | ||
| """{ | ||
| "version": { | ||
| "name": "${ | ||
| LegacyComponentSerializer.legacySection() | ||
| .serialize(MiniMessage.miniMessage().deserialize("<rainbow>MiniMessage")) | ||
| }", | ||
| "protocol": 762 | ||
| }, | ||
| "description": ${ | ||
| GsonComponentSerializer.gson().serialize( | ||
| MiniMessage.miniMessage().deserialize("<rainbow>MiniMessage is cool!") | ||
| ) | ||
| } | ||
| }""".trimIndent() | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| sendChannel.close() | ||
| } catch (e: Exception) { | ||
| println(e) | ||
| } | ||
|
|
||
| socket.close() | ||
| return@launch | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| public suspend fun ByteWriteChannel.writeMcPacket(packetId: Int, consumer: (packet: DataOutputStream) -> Unit) { | ||
| val stream = ByteArrayOutputStream() | ||
| val packet = DataOutputStream(stream) | ||
|
|
||
| consumer.invoke(packet) | ||
|
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| val data = stream.toByteArray() | ||
| writeVarInt(data.size + 1) | ||
| writeVarInt(packetId) | ||
| writeFully(data) | ||
| } | ||
|
|
||
| public fun DataOutputStream.writeString(string: String) { | ||
| val bytes = string.toByteArray(UTF_8) | ||
| writeVarInt(bytes.size) | ||
| write(bytes) | ||
| } | ||
|
|
||
| public fun DataOutputStream.writeVarInt(int: Int) { | ||
| var value = int | ||
| while (true) { | ||
| if ((value and 0x7F.inv()) == 0) { | ||
| writeByte(value) | ||
| return | ||
| } | ||
|
|
||
| writeByte((value and 0x7F) or 0x80) | ||
|
|
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| value = value ushr 7 | ||
| } | ||
| } | ||
|
|
||
| public suspend fun ByteWriteChannel.writeVarInt(int: Int) { | ||
| var value = int | ||
| while (true) { | ||
| if ((value and 0x7F.inv()) == 0) { | ||
| writeByte(value) | ||
| return | ||
| } | ||
|
|
||
| writeByte((value and 0x7F) or 0x80) | ||
|
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| value = value ushr 7 | ||
| } | ||
| } | ||
|
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||
| public suspend fun ByteReadChannel.readMcPacket(): ByteReadChannel { | ||
| val length = readVarInt() | ||
| val packetId = readVarInt() | ||
| val data = ByteArray(length) | ||
| readFully(data, 0, length) | ||
| return ByteReadChannel(data) | ||
| } | ||
|
|
||
| public suspend fun ByteReadChannel.readVarInt(): Int { | ||
| var value = 0 | ||
| var position = 0 | ||
| var currentByte: Byte | ||
|
|
||
| while (true) { | ||
| currentByte = readByte() | ||
| value = value or ((currentByte and 0x7F) shl position) | ||
|
|
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| if ((currentByte and 0x80) == 0) break | ||
|
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| position += 7 | ||
|
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| if (position >= 32) throw RuntimeException("VarInt is too big") | ||
| } | ||
|
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| return value | ||
| } | ||
|
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||
| public suspend fun ByteReadChannel.readUtf8String(): String { | ||
| val length = readVarInt() | ||
| val data = ByteArray(length) | ||
| readFully(data, 0, length) | ||
| return String(data) | ||
| } |