Created
September 22, 2022 04:58
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A simple JSON log server
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| const http = require("http"); | |
| const fs = require("fs"); | |
| const { networkInterfaces } = require("os"); | |
| const path = require("path"); | |
| const PORT = process.argv.length > 2 ? process.argv[2] : 8081; | |
| const LOG_PATH = process.argv.length > 3 ? process.argv[3] : "logs"; | |
| if (!fs.existsSync(LOG_PATH)) { | |
| fs.mkdirSync(LOG_PATH); | |
| } | |
| const currentDate = new Date(); | |
| const currentSessionLogFile = `${LOG_PATH}${ | |
| path.sep | |
| }${currentDate.getFullYear()}-${currentDate.getMonth()}-${currentDate.getDate()}.log`; | |
| const logFileStream = fs.createWriteStream(currentSessionLogFile, { | |
| flags: "a", | |
| }); | |
| const networks = networkInterfaces(); | |
| const handleLog = (data, type) => { | |
| if (Array.isArray(data) && data.length === 0) { | |
| // Ignore empty data if it is an array | |
| return; | |
| } | |
| let myTypeString; | |
| switch (type.toString().toLowerCase()) { | |
| case "debug": | |
| myTypeString = "[DEBUG]"; | |
| Array.isArray(data) ? console.debug(...data) : console.debug(data); | |
| break; | |
| case "error": | |
| myTypeString = "[ERROR]"; | |
| Array.isArray(data) ? console.error(...data) : console.error(data); | |
| break; | |
| case "info": | |
| myTypeString = "[INFO]"; | |
| Array.isArray(data) ? console.info(...data) : console.info(data); | |
| break; | |
| case "warn": | |
| myTypeString = "[WARN]"; | |
| Array.isArray(data) ? console.warn(...data) : console.warn(data); | |
| break; | |
| default: | |
| myTypeString = "[LOG]"; | |
| Array.isArray(data) ? console.log(...data) : console.log(data); | |
| break; | |
| } | |
| if ( | |
| (Array.isArray(data) && data.length === 1) || | |
| typeof data !== "object" | |
| ) { | |
| logFileStream.write(`${myTypeString} ${data}\n`); | |
| return; | |
| } | |
| logFileStream.write(`${myTypeString} ${JSON.stringify(data)}\n`); | |
| }; | |
| const listener = (req, res) => { | |
| // CORS headers | |
| const headers = { | |
| "Access-Control-Allow-Origin": "*", | |
| "Access-Control-Allow-Methods": "OPTIONS, POST, GET", | |
| "Access-Control-Max-Age": 2592000, | |
| "Access-Control-Allow-Headers": "Content-Type, x-requested-with", | |
| }; | |
| if (req.method === "OPTIONS") { | |
| res.writeHead(204, headers); | |
| res.end(); | |
| return; | |
| } | |
| let body = ""; | |
| req.on("data", (data) => { | |
| body += data.toString(); | |
| }); | |
| req.on("end", () => { | |
| res.writeHead(200, { ...headers, "Content-Type": "application/json" }); | |
| res.end(JSON.stringify({ status: 200, message: "ok" })); | |
| if (body.toString().trim() === "") { | |
| // Ignore empty body requests | |
| return; | |
| } | |
| try { | |
| const logData = JSON.parse(body); | |
| const { data, type } = logData; | |
| if (!data || !type) { | |
| // Some random JSON hence just print | |
| handleLog(logData, "log"); | |
| return; | |
| } | |
| handleLog(data, type); | |
| } catch { | |
| // Probably not JSON data hence just print | |
| handleLog(body, "log"); | |
| } | |
| }); | |
| }; | |
| const server = http.createServer(listener); | |
| console.log(`Starting remote console log server on port ${PORT}...`); | |
| server.listen(PORT); | |
| console.log(`Logs are being saved into the file ${currentSessionLogFile}`); | |
| console.log("Remote log server addresses are as follows:"); | |
| console.log(`http://127.0.0.1:${PORT}`); | |
| console.log(`http://localhost:${PORT}`); | |
| for (let i = 0; i < Object.keys(networks).length; i += 1) { | |
| const key = Object.keys(networks)[i]; | |
| const currentNetworks = networks[key]; | |
| currentNetworks.forEach((network) => { | |
| const networkFamilyIPv4 = | |
| typeof network.family === "string" ? "IPv4" : 4; | |
| if (network.family === networkFamilyIPv4 && !network.internal) { | |
| console.log(`http://${network.address}:${PORT}`); | |
| } | |
| }); | |
| } |
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