Add support for running using deno (#362)

* Add missing CRLF line ending

* Add support for running using deno

Prefix node imports with "node:" and gate a socket API that is not
implemented in [deno](https://deno.land) so that the library can be used
there. This should not break node and doesn't in my brief testing.

CHANGELOG.md

@@ -36,6 +36,8 @@
 * Operation: Harsh Doorstop (2023) - Added support.
 * Insurgency: Modern Infantry Combat (2007) - Added support.
 * Capatilzed Unturned in game.txt
+* Added Deno support: the library and CLI can now be experimentally used with the [Deno runtime](https://deno.com)
+    * `deno run --allow-net --allow-read=. bin/gamedig.js --type tf2 127.0.0.1`
 
 ### 4.1.0
 * Replace `compressjs` dependency by `seek-bzip` to solve some possible import issues.

bin/gamedig.js

@@ -1,5 +1,7 @@
 #!/usr/bin/env node
 
+import * as process from "node:process";
+
 import Minimist from 'minimist'
 import GameDig from './../lib/index.js'
 

bin/genreadme.js

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 
-import * as fs from 'fs'
+import * as fs from 'node:fs'
 import GameResolver from '../lib/GameResolver'
 
 const gameResolver = new GameResolver()

lib/DnsResolver.js

@@ -1,6 +1,6 @@
-import * as dns from 'dns'
+import * as dns from 'node:dns'
 import punycode from 'punycode/punycode.js'
-import { promisify } from 'util'
+import { promisify } from 'node:util'
 
 const dnsLookupAsync = promisify(dns.lookup)
 const dnsResolveAsync = promisify(dns.resolve)

lib/GameResolver.js

@@ -1,6 +1,6 @@
-import * as path from 'path'
-import { fileURLToPath } from 'url'
-import * as fs from 'fs'
+import * as path from 'node:path'
+import { fileURLToPath } from 'node:url'
+import * as fs from 'node:fs'
 
 export default class GameResolver {
   constructor () {

lib/GlobalUdpSocket.js

@@ -1,6 +1,6 @@
-import { createSocket } from 'dgram'
+import { createSocket } from 'node:dgram'
 import { debugDump } from './HexUtil.js'
-import { promisify } from 'util'
+import { promisify } from 'node:util'
 import Logger from './Logger.js'
 
 export default class GlobalUdpSocket {
@@ -18,7 +18,10 @@ export default class GlobalUdpSocket {
         type: 'udp4',
         reuseAddr: true
       })
-      udpSocket.unref()
+      // https://github.com/denoland/deno/issues/20138
+      if (typeof Deno === "undefined") {
+        udpSocket.unref();
+      }
       udpSocket.on('message', (buffer, rinfo) => {
         const fromAddress = rinfo.address
         const fromPort = rinfo.port
@@ -59,7 +62,7 @@ export default class GlobalUdpSocket {
       this.debuggingCallbacks.add(callback)
       this.logger.debugEnabled = true
     }
-  }
+  }
 
   removeCallback (callback) {
     this.callbacks.delete(callback)

lib/Logger.js

@@ -1,4 +1,5 @@
 import { debugDump } from './HexUtil.js'
+import { Buffer} from 'node:buffer'
 
 export default class Logger {
   constructor () {

lib/QueryRunner.js

@@ -69,12 +69,21 @@ export default class QueryRunner {
     for (const attempt of attempts) {
       for (let retry = 0; retry < numRetries; retry++) {
         attemptNum++
+        let result
         try {
-          return await this._attempt(attempt)
+          result = await this._attempt(attempt)
         } catch (e) {
           e.stack = 'Attempt #' + attemptNum + ' - Port=' + attempt.port + ' Retry=' + (retry) + ':\n' + e.stack
           errors.push(e)
+        } finally {
+          // Deno doesn't support unref, so we must close the socket after every connection
+          // https://github.com/denoland/deno/issues/20138
+          if (typeof Deno !== "undefined") {
+            this.udpSocket?.socket?.close()
+            delete this.udpSocket
+          }
         }
+        if (result) return result
       }
     }
 

lib/reader.js

@@ -1,6 +1,6 @@
 import Iconv from 'iconv-lite'
 import Long from 'long'
-import { Buffer } from 'buffer'
+import { Buffer } from 'node:buffer'
 import Varint from 'varint'
 
 function readUInt64BE (buffer, offset) {

protocols/core.js

@@ -1,5 +1,5 @@
-import { EventEmitter } from 'events'
-import * as net from 'net'
+import { EventEmitter } from 'node:events'
+import * as net from 'node:net'
 import Reader from '../lib/reader.js'
 import { debugDump } from '../lib/HexUtil.js'
 import Logger from '../lib/Logger.js'

protocols/valve.js

@@ -1,5 +1,6 @@
 import Bzip2 from 'seek-bzip'
 import Core from './core.js'
+import { Buffer } from 'node:buffer'
 
 const AppId = {
   Squad: 393380,