-
Notifications
You must be signed in to change notification settings - Fork 16
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
better logging and coroutine handling
- Loading branch information
1 parent
7a740b3
commit 0bac3e0
Showing
3 changed files
with
200 additions
and
181 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
164 changes: 0 additions & 164 deletions
164
src/jvmMain/kotlin/net/kyori/adventure/webui/jvm/minimessage/SocketTest.kt
This file was deleted.
Oops, something went wrong.
182 changes: 182 additions & 0 deletions
182
...in/kotlin/net/kyori/adventure/webui/jvm/minimessage/preview/ServerStatusPreviewManager.kt
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,182 @@ | ||
| package net.kyori.adventure.webui.jvm.minimessage.preview | ||
|
|
||
| import io.ktor.network.selector.SelectorManager | ||
| import io.ktor.network.sockets.aSocket | ||
| import io.ktor.network.sockets.openReadChannel | ||
| import io.ktor.network.sockets.openWriteChannel | ||
| import io.ktor.server.application.Application | ||
| import io.ktor.utils.io.ByteReadChannel | ||
| import io.ktor.utils.io.ByteWriteChannel | ||
| import io.ktor.utils.io.close | ||
| import io.ktor.utils.io.writeByte | ||
| import io.ktor.utils.io.writeFully | ||
| import kotlinx.coroutines.CoroutineScope | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.SupervisorJob | ||
| import kotlinx.coroutines.ensureActive | ||
| import kotlinx.coroutines.job | ||
| import kotlinx.coroutines.launch | ||
| 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 org.slf4j.LoggerFactory | ||
| import java.io.ByteArrayOutputStream | ||
| import java.io.DataOutputStream | ||
| import kotlin.coroutines.CoroutineContext | ||
|
|
||
| /** Manager class for previewing server status. */ | ||
| public class ServerStatusPreviewManager( | ||
| application: Application, | ||
| ) : CoroutineScope { | ||
|
|
||
| private val logger = LoggerFactory.getLogger(ServerStatusPreviewManager::class.java) | ||
| private val managerJob = SupervisorJob(application.coroutineContext.job) | ||
| override val coroutineContext: CoroutineContext = application.coroutineContext + managerJob | ||
|
|
||
| init { | ||
| launch { | ||
| // Initialise the socket. | ||
| val serverSocket = aSocket(SelectorManager(Dispatchers.IO)).tcp().bind("127.0.0.1", 9002) | ||
| logger.info("Listening for pings at ${serverSocket.localAddress}") | ||
|
|
||
| while (true) { | ||
| // Ensure we are active so that the socket is properly closed when the application ends. | ||
| ensureActive() | ||
|
|
||
| val socket = serverSocket.accept() | ||
| logger.debug("Accepted socket connection from {}", socket.remoteAddress) | ||
|
|
||
| launch { | ||
| try { | ||
| val receiveChannel = socket.openReadChannel() | ||
| val sendChannel = socket.openWriteChannel(autoFlush = true) | ||
|
|
||
| // handshake | ||
| val handshakePacket = receiveChannel.readMcPacket() | ||
| val protocolVersion = handshakePacket.readVarInt() | ||
| val serverAddress = handshakePacket.readUtf8String() | ||
| val serverPort = handshakePacket.readShort() | ||
| val nextState = handshakePacket.readVarInt() | ||
|
|
||
| if (nextState != 1) { | ||
| // send kick | ||
| sendChannel.writeMcPacket(0) { | ||
| it.writeString( | ||
| GsonComponentSerializer.gson() | ||
| .serialize(MiniMessage.miniMessage().deserialize("<red>You cant join here!")) | ||
| ) | ||
| } | ||
| } else { | ||
| // send status response | ||
| sendChannel.writeMcPacket(0) { | ||
| it.writeString( | ||
| """{ | ||
| "version": { | ||
| "name": "${ | ||
| LegacyComponentSerializer.legacySection() | ||
| .serialize(MiniMessage.miniMessage().deserialize("<rainbow>MiniMessage")) | ||
| }", | ||
| "protocol": $protocolVersion | ||
| }, | ||
| "description": ${ | ||
| GsonComponentSerializer.gson().serialize( | ||
| MiniMessage.miniMessage().deserialize("<rainbow>MiniMessage is cool!") | ||
| ) | ||
| } | ||
| }""".trimIndent() | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| sendChannel.close() | ||
| } catch (e: Exception) { | ||
| logger.error("An unknown error occurred whilst responding to a ping from ${socket.remoteAddress}", e) | ||
| } | ||
|
|
||
| socket.close() | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private suspend fun ByteWriteChannel.writeMcPacket(packetId: Int, consumer: (packet: DataOutputStream) -> Unit) { | ||
| val stream = ByteArrayOutputStream() | ||
| val packet = DataOutputStream(stream) | ||
|
|
||
| consumer.invoke(packet) | ||
|
|
||
| val data = stream.toByteArray() | ||
| writeVarInt(data.size + 1) | ||
| writeVarInt(packetId) | ||
| writeFully(data) | ||
| } | ||
|
|
||
| private fun DataOutputStream.writeString(string: String) { | ||
| val bytes = string.toByteArray(Charsets.UTF_8) | ||
| writeVarInt(bytes.size) | ||
| write(bytes) | ||
| } | ||
|
|
||
| private 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) | ||
|
|
||
| value = value ushr 7 | ||
| } | ||
| } | ||
|
|
||
| private 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) | ||
|
|
||
| value = value ushr 7 | ||
| } | ||
| } | ||
|
|
||
| private suspend fun ByteReadChannel.readMcPacket(): ByteReadChannel { | ||
| val length = readVarInt() | ||
| val packetId = readVarInt() | ||
| val data = ByteArray(length) | ||
| readFully(data, 0, length) | ||
| return ByteReadChannel(data) | ||
| } | ||
|
|
||
| private 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) | ||
|
|
||
| if ((currentByte and 0x80) == 0) break | ||
|
|
||
| position += 7 | ||
|
|
||
| if (position >= 32) throw RuntimeException("VarInt is too big") | ||
| } | ||
|
|
||
| return value | ||
| } | ||
|
|
||
| private suspend fun ByteReadChannel.readUtf8String(): String { | ||
| val length = readVarInt() | ||
| val data = ByteArray(length) | ||
| readFully(data, 0, length) | ||
| return String(data) | ||
| } | ||
| } |