Add API to get server status information.

This commit is contained in:
Daniel Scalzi 2020-08-27 19:37:41 -04:00
parent feb9b98b2a
commit 3838729da7
No known key found for this signature in database
GPG Key ID: D18EA3FB4B142A57
5 changed files with 395 additions and 141 deletions

247
package-lock.json generated
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"dev": true,
"requires": {
"p-locate": "^3.0.0",
"path-exists": "^3.0.0"
}
},
"p-limit": {
"version": "2.3.0",
"resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.3.0.tgz",
"integrity": "sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==",
"dev": true,
"requires": {
"p-try": "^2.0.0"
}
},
"p-locate": {
"version": "3.0.0",
"resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
"integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
"dev": true,
"requires": {
"p-limit": "^2.0.0"
}
},
"path-exists": {
"version": "3.0.0",
"resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
"integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
"dev": true
} }
} }
}, },

View File

@ -57,7 +57,7 @@
"@types/lodash": "^4.14.160", "@types/lodash": "^4.14.160",
"@types/mocha": "^8.0.3", "@types/mocha": "^8.0.3",
"@types/node": "^12.12.54", "@types/node": "^12.12.54",
"@types/react": "^16.9.46", "@types/react": "^16.9.48",
"@types/react-dom": "^16.9.8", "@types/react-dom": "^16.9.8",
"@types/react-redux": "^7.1.9", "@types/react-redux": "^7.1.9",
"@types/react-transition-group": "^4.4.0", "@types/react-transition-group": "^4.4.0",
@ -65,8 +65,8 @@
"@types/tar-fs": "^2.0.0", "@types/tar-fs": "^2.0.0",
"@types/triple-beam": "^1.3.2", "@types/triple-beam": "^1.3.2",
"@types/winreg": "^1.2.30", "@types/winreg": "^1.2.30",
"@typescript-eslint/eslint-plugin": "^3.10.0", "@typescript-eslint/eslint-plugin": "^3.10.1",
"@typescript-eslint/parser": "^3.10.0", "@typescript-eslint/parser": "^3.10.1",
"chai": "^4.2.0", "chai": "^4.2.0",
"cross-env": "^7.0.2", "cross-env": "^7.0.2",
"electron": "^9.2.1", "electron": "^9.2.1",
@ -77,7 +77,7 @@
"eslint": "^7.7.0", "eslint": "^7.7.0",
"eslint-plugin-react": "^7.20.6", "eslint-plugin-react": "^7.20.6",
"helios-distribution-types": "1.0.0-pre.1", "helios-distribution-types": "1.0.0-pre.1",
"mocha": "^8.1.1", "mocha": "^8.1.2",
"nock": "^13.0.4", "nock": "^13.0.4",
"react": "^16.13.0", "react": "^16.13.0",
"react-dom": "^16.13.0", "react-dom": "^16.13.0",

View File

@ -0,0 +1,262 @@
/* eslint-disable no-control-regex */
import { connect } from 'net'
import { LoggerUtil } from 'common/logging/loggerutil'
const logger = LoggerUtil.getLogger('ServerStatusUtil')
export interface ServerStatus {
version: {
name: string
protocol: number
}
players: {
max: number
online: number
sample: {
name: string
id: string
}[]
}
description: {
text: string
}
favicon: string
modinfo?: { // Only for modded servers
type: string // Ex. FML
modList: {
modid: string
version: string
}[]
}
}
/**
* Utility Class to construct a packet conforming to Minecraft's
* protocol. All data types are BE except VarInt and VarLong.
*
* @see https://wiki.vg/Protocol
*/
class ServerBoundPacket {
private buffer: number[]
protected constructor() {
this.buffer = []
}
public static build(): ServerBoundPacket {
return new ServerBoundPacket()
}
/**
* Packet is prefixed with its data length as a VarInt.
*
* @see https://wiki.vg/Protocol#Packet_format
*/
public toBuffer(): Buffer {
const finalizedPacket = new ServerBoundPacket()
finalizedPacket.writeVarInt(this.buffer.length)
finalizedPacket.writeBytes(...this.buffer)
return Buffer.from(finalizedPacket.buffer)
}
public writeBytes(...bytes: number[]): ServerBoundPacket {
this.buffer.push(...bytes)
return this
}
/**
* @see https://wiki.vg/Protocol#VarInt_and_VarLong
*/
public writeVarInt(value: number): ServerBoundPacket {
do {
let temp = value & 0b01111111
value >>>= 7
if (value != 0) {
temp |= 0b10000000
}
this.writeBytes(temp)
} while (value != 0)
return this
}
/**
* Strings are prefixed with their length as a VarInt.
*
* @see https://wiki.vg/Protocol#Data_types
*/
public writeString(string: string): ServerBoundPacket {
this.writeVarInt(string.length)
for (let i=0; i<string.length; i++) {
this.writeBytes(string.codePointAt(i)!)
}
return this
}
public writeUnsignedShort(short: number): ServerBoundPacket {
const buf = Buffer.alloc(2)
buf.writeUInt16BE(short, 0)
this.writeBytes(...buf)
return this
}
}
/**
* Utility Class to read a client-bound packet conforming to
* Minecraft's protocol. All data types are BE except VarInt
* and VarLong.
*
* @see https://wiki.vg/Protocol
*/
class ClientBoundPacket {
private buffer: number[]
constructor(buffer: Buffer) {
this.buffer = [...buffer]
}
public readByte(): number {
return this.buffer.shift()!
}
public readBytes(length: number): number[] {
const value = this.buffer.slice(0, length)
this.buffer.splice(0, length)
return value
}
public readVarInt(): number {
let numRead = 0
let result = 0
let read
do {
read = this.readByte()
const value = (read & 0b01111111)
result |= (value << (7 * numRead))
numRead++
if (numRead > 5) {
throw new Error('VarInt is too big')
}
} while ((read & 0b10000000) != 0)
return result
}
public readString(): string {
const length = this.readVarInt()
const data = this.readBytes(length)
let value = ''
for (let i=0; i<data.length; i++) {
value += String.fromCharCode(data[i])
}
return value
}
}
/**
* Get the handshake packet.
*
* @param protocol The client's protocol version.
* @param address The server address.
* @param port The server port.
*
* @see https://wiki.vg/Server_List_Ping#Handshake
*/
function getHandshakePacket(protocol: number, address: string, port: number): Buffer {
return ServerBoundPacket.build()
.writeVarInt(0x00) // Packet Id
.writeVarInt(protocol)
.writeString(address)
.writeUnsignedShort(port)
.writeVarInt(1) // State, 1 = status
.toBuffer()
}
/**
* Get the request packet.
*
* @see https://wiki.vg/Server_List_Ping#Request
*/
function getRequestPacket(): Buffer {
return ServerBoundPacket.build()
.writeVarInt(0x00)
.toBuffer()
}
export function getServerStatus(protocol: number, address: string, port = 25565): Promise<ServerStatus | null> {
return new Promise((resolve, reject) => {
const socket = connect(port, address, () => {
socket.write(getHandshakePacket(protocol, address, port))
socket.write(getRequestPacket())
})
socket.setTimeout(2500, () => {
socket.destroy()
logger.error(`Server Status Socket timed out (${address}:${port})`)
reject(new Error(`Server Status Socket timed out (${address}:${port})`))
})
socket.on('data', (data) => {
const inboundPacket = new ClientBoundPacket(data)
// eslint-disable-next-line @typescript-eslint/no-unused-vars
const packetLength = inboundPacket.readVarInt() // First VarInt is packet length.
const packetType = inboundPacket.readVarInt() // Second VarInt is packet type.
if(packetType !== 0x00) {
// TODO
socket.destroy()
reject(new Error(`Invalid response. Expected packet type ${0x00}, received ${packetType}!`))
return
}
const res = inboundPacket.readString() // Remainder of Buffer is the server status json.
socket.end()
resolve(JSON.parse(res))
})
socket.on('error', (err: NodeJS.ErrnoException) => {
socket.destroy()
if(err.code === 'ENOTFOUND') {
// ENOTFOUND = Unable to resolve.
logger.error(`Server ${address}:${port} not found!`)
resolve(null)
return
} else if(err.code === 'ECONNREFUSED') {
// ECONNREFUSED = Unable to connect to port.
logger.error(`Server ${address}:${port} refused to connect, is the port correct?`)
resolve(null)
return
} else {
logger.error(`Error trying to pull server status (${address}:${port}})`, err)
resolve(null)
return
}
})
})
}

View File

@ -18,6 +18,7 @@ import Overlay from './overlay/Overlay'
import { OverlayPushAction, OverlayActionDispatch } from '../redux/actions/overlayActions' import { OverlayPushAction, OverlayActionDispatch } from '../redux/actions/overlayActions'
import { DistributionAPI } from 'common/distribution/distribution' import { DistributionAPI } from 'common/distribution/distribution'
import { getServerStatus } from 'common/util/ServerStatusUtil'
import './Application.css' import './Application.css'
@ -129,6 +130,8 @@ class Application extends React.Component<ApplicationProps & typeof mapDispatch,
const distro = new DistributionAPI('C:\\Users\\user\\AppData\\Roaming\\Helios Launcher') const distro = new DistributionAPI('C:\\Users\\user\\AppData\\Roaming\\Helios Launcher')
const x = await distro.testLoad() const x = await distro.testLoad()
console.log(x) console.log(x)
const serverStatus = await getServerStatus(47, 'mc.westeroscraft.com', 25565)
console.log(serverStatus)
} }
}) })
this.props.pushGenericOverlay({ this.props.pushGenericOverlay({

View File

@ -2,6 +2,8 @@ import * as React from 'react'
import { connect } from 'react-redux' import { connect } from 'react-redux'
import { OverlayActionDispatch } from '../../../redux/actions/overlayActions' import { OverlayActionDispatch } from '../../../redux/actions/overlayActions'
import { LoggerUtil } from 'common/logging/loggerutil'
import './GenericOverlay.css' import './GenericOverlay.css'
export interface GenericOverlayProps { export interface GenericOverlayProps {
@ -22,6 +24,8 @@ type InternalGenericOverlayProps = GenericOverlayProps & typeof mapDispatch
class GenericOverlay extends React.Component<InternalGenericOverlayProps> { class GenericOverlay extends React.Component<InternalGenericOverlayProps> {
private readonly logger = LoggerUtil.getLogger('GenericOverlay')
private getAcknowledgeText = (): string => { private getAcknowledgeText = (): string => {
return this.props.acknowledgeText || 'OK' return this.props.acknowledgeText || 'OK'
} }
@ -32,14 +36,22 @@ class GenericOverlay extends React.Component<InternalGenericOverlayProps> {
private onAcknowledgeClick = async (event: React.MouseEvent<HTMLButtonElement, MouseEvent>): Promise<void> => { private onAcknowledgeClick = async (event: React.MouseEvent<HTMLButtonElement, MouseEvent>): Promise<void> => {
if(this.props.acknowledgeCallback) { if(this.props.acknowledgeCallback) {
try {
await this.props.acknowledgeCallback(event) await this.props.acknowledgeCallback(event)
} catch(err) {
this.logger.error('Uncaught error in acknowledgement', err)
}
} }
this.props.popOverlayContent() this.props.popOverlayContent()
} }
private onDismissClick = async (event: React.MouseEvent<HTMLButtonElement, MouseEvent>): Promise<void> => { private onDismissClick = async (event: React.MouseEvent<HTMLButtonElement, MouseEvent>): Promise<void> => {
if(this.props.dismissCallback) { if(this.props.dismissCallback) {
try {
await this.props.dismissCallback(event) await this.props.dismissCallback(event)
} catch(err) {
this.logger.error('Uncaught error in dismission', err)
}
} }
this.props.popOverlayContent() this.props.popOverlayContent()
} }