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alexkar598 committed Mar 23, 2022
1 parent 258d955 commit 05e556d
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8 changes: 5 additions & 3 deletions .gitignore
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@@ -1,3 +1,5 @@
node_modules/
jsdoc/
test.js
node_modules
*.iml
.idea

dist
Empty file added dist/.gitkeep
Empty file.
30 changes: 30 additions & 0 deletions package-lock.json

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33 changes: 26 additions & 7 deletions package.json
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@@ -1,15 +1,34 @@
{
"name": "http2byond",
"description": "Communication layer between node.js and BYOND game servers.",
"version": "2.0.1",
"author": "Tigercat2000",
"dependencies": {
"jspack": "0.0.4"
},
"version": "3.0.0",
"contributors": [
{
"name": "Tigercat2000",
"email": "[email protected]",
"url": "https://github.com/tigercat2000"
},
{
"name": "alexkar598",
"email": "[email protected]",
"url": "https://github.com/alexkar598"
}
],
"keywords": [
"byond"
],
"license": "MIT",
"main": "index.js",
"repository": "tigercat2000/http2byond"
"main": "dist/index.js",
"repository": {
"type": "git",
"url": "https://github.com/tigercat2000/http2byond"
},
"files": [
"dist",
"types"
],
"types": "typings/index.d.ts",
"devDependencies": {
"@types/node": "^17.0.22"
}
}
165 changes: 165 additions & 0 deletions src/index.ts
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import { Socket, createConnection } from 'net'

export interface SocketConfig {
//Domain name or IP to connect to
host: string;
//Port to connect to
port: number;
}
export type SingleRunConfiguration = SocketConfig & {
//URL params to send to BYOND
topic: string;
//Time to wait before aborting connection
timeout?: number;
}
export type TopicReturnType = string | number | null

export interface TopicConnection {
send: (topic: string) => Promise<TopicReturnType>
destroy: () => void
}

function _sendTopic(socket: Socket, _topic: string): Promise<TopicReturnType> {
const topic = _topic[0] !== "?" ?
"?" + _topic :
_topic

return new Promise((resolve, reject) => {
function errorHandler(reason: string) {
return function(originalError?: Error) {
/*reject(new Error(reason, {
cause: originalError
}))*/
originalError ?
reject(new Error(reason + "\n Caused by: " + originalError)) :
reject(new Error(reason))
socket.destroy()
}
}

socket.on("error", errorHandler("Socket errored"))
socket.on("timeout", errorHandler("Connection timeout"))

let byte = 0
//type(2) + length(2)
const headerBuffer = Buffer.alloc(4)
let bodyBuffer: Buffer;

function processResponse() {
const type = bodyBuffer[0];
switch (type) {
case 0x00: {
return resolve(null)
}
case 0x2a: {
return resolve(bodyBuffer.readFloatLE(1))
}
case 0x06: {
return resolve(bodyBuffer.subarray(0, -1).toString("utf-8"))
}
}
}


socket.on("data", data => {
//Still waiting on a complete header
if(byte < 4) {
const copiedBytes = data.copy(headerBuffer)
data = data.subarray(copiedBytes)
byte += copiedBytes

//Got the full header!
if(byte >= 4) {
bodyBuffer = Buffer.alloc(headerBuffer.readUint16BE(2))
//Sucks to be you, maybe you'll get a full header later?
} else {
return
}
}

//We either just finished reading the header and got more to read, or we just got another body packet
if (data.length) {
const copiedBytes = data.copy(bodyBuffer)
byte += copiedBytes
}

//expected buffer length + the header length
const fullLength = 4 + bodyBuffer.length

//We got too many bytes!
if(byte > fullLength) {
errorHandler("Data is larger than expected")
return
}

//No more data to read
if(byte === fullLength) {
socket.end()
processResponse()
}
})

socket.on("ready", () => {
const topicBuffer = Buffer.from(topic)
//type(2) + length(2) + padding(5) + msg(n) + terminator(1)
const dataBuffer = Buffer.alloc(2 + 2 + 5 + topicBuffer.length + 1)
let ptr;

//Packet type 0x0083
dataBuffer[0] = 0x00
dataBuffer[1] = 0x83

//Write length of buffer
//padding(5) + msg(n) + terminator(1)
dataBuffer.writeUInt16BE(5 + topicBuffer.length + 1, 2)

//Write padding
dataBuffer[4] = 0x00
dataBuffer[5] = 0x00
dataBuffer[6] = 0x00
dataBuffer[7] = 0x00
dataBuffer[8] = 0x00

//We're done with the header, we need to write the null terminated string to the 8th byte.
ptr = 9;
topicBuffer.copy(dataBuffer, ptr)
ptr += topicBuffer.length
dataBuffer[ptr] = 0x00

socket.write(dataBuffer)

})
})
}

function sendTopic(config: SingleRunConfiguration): Promise<TopicReturnType> {
const socket = createConnection({
family: 4,
host: config.host,
port: config.port,
timeout: config.timeout
})
return _sendTopic(socket, config.topic)
}

function createTopicConnection(config: SocketConfig): TopicConnection {
let socket = createConnection({
family: 4,
host: config.host,
port: config.port
})
return {
send: topic => {
if (socket.destroyed) {
return Promise.reject(new Error("Socket is destroyed"))
}

return _sendTopic(socket, topic)
},
destroy: () => {
socket.destroy()
}
}
}

export { sendTopic, createTopicConnection }
101 changes: 101 additions & 0 deletions tsconfig.json
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{
"compilerOptions": {
/* Visit https://aka.ms/tsconfig.json to read more about this file */

/* Projects */
// "incremental": true, /* Enable incremental compilation */
// "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */
// "tsBuildInfoFile": "./", /* Specify the folder for .tsbuildinfo incremental compilation files. */
// "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects */
// "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */
// "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */

/* Language and Environment */
"target": "es2017", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
// "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */
// "jsx": "preserve", /* Specify what JSX code is generated. */
// "experimentalDecorators": true, /* Enable experimental support for TC39 stage 2 draft decorators. */
// "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */
// "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */
// "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */
// "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */
// "reactNamespace": "", /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */
// "noLib": true, /* Disable including any library files, including the default lib.d.ts. */
// "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */

/* Modules */
"module": "commonjs", /* Specify what module code is generated. */
"rootDir": "./src", /* Specify the root folder within your source files. */
"moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */
// "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */
// "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */
// "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */
// "typeRoots": [], /* Specify multiple folders that act like `./node_modules/@types`. */
// "types": [], /* Specify type package names to be included without being referenced in a source file. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */
// "resolveJsonModule": true, /* Enable importing .json files */
// "noResolve": true, /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */

/* JavaScript Support */
// "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */
// "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */
// "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */

/* Emit */
"declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
// "declarationMap": true, /* Create sourcemaps for d.ts files. */
// "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */
"sourceMap": true, /* Create source map files for emitted JavaScript files. */
// "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */
"outDir": "./dist", /* Specify an output folder for all emitted files. */
// "removeComments": true, /* Disable emitting comments. */
// "noEmit": true, /* Disable emitting files from a compilation. */
// "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
// "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types */
// "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */
// "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */
// "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */
// "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */
// "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */
// "newLine": "crlf", /* Set the newline character for emitting files. */
// "stripInternal": true, /* Disable emitting declarations that have `@internal` in their JSDoc comments. */
// "noEmitHelpers": true, /* Disable generating custom helper functions like `__extends` in compiled output. */
// "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */
// "preserveConstEnums": true, /* Disable erasing `const enum` declarations in generated code. */
"declarationDir": "./typings", /* Specify the output directory for generated declaration files. */
// "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */

/* Interop Constraints */
// "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */
// "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */
"esModuleInterop": false, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */
// "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
"forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */

/* Type Checking */
"strict": true, /* Enable all strict type-checking options. */
// "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied `any` type.. */
// "strictNullChecks": true, /* When type checking, take into account `null` and `undefined`. */
// "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
// "strictBindCallApply": true, /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */
// "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */
// "noImplicitThis": true, /* Enable error reporting when `this` is given the type `any`. */
// "useUnknownInCatchVariables": true, /* Type catch clause variables as 'unknown' instead of 'any'. */
// "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */
// "noUnusedLocals": true, /* Enable error reporting when a local variables aren't read. */
// "noUnusedParameters": true, /* Raise an error when a function parameter isn't read */
// "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */
// "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */
// "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */
// "noUncheckedIndexedAccess": true, /* Include 'undefined' in index signature results */
// "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */
// "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type */
// "allowUnusedLabels": true, /* Disable error reporting for unused labels. */
// "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */

/* Completeness */
// "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */
"skipLibCheck": true /* Skip type checking all .d.ts files. */
}
}
16 changes: 16 additions & 0 deletions typings/index.d.ts
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export interface SocketConfig {
host: string;
port: number;
}
export declare type SingleRunConfiguration = SocketConfig & {
topic: string;
timeout?: number;
};
export declare type TopicReturnType = string | number | null;
export interface TopicConnection {
send: (topic: string) => Promise<TopicReturnType>;
destroy: () => void;
}
declare function sendTopic(config: SingleRunConfiguration): Promise<TopicReturnType>;
declare function createTopicConnection(config: SocketConfig): TopicConnection;
export { sendTopic, createTopicConnection };

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