logAggregator/logAggregator.js

const micro = require('micro');
const { json, send } = require('micro');
const { RuleEngine } = require('./RuleEngine');
const fs = require('fs');
const jsonminify = require('jsonminify');
const winston = require("winston");

const logger = winston.createLogger({
    level: 'info',
    format: winston.format.combine(
        winston.format.timestamp(),
        winston.format.printf(info => {
            return `${info.timestamp} ${info.level}: ${info.message}`;
        })
    ),
    transports: [
        new winston.transports.Console(),
        new winston.transports.File({ filename: './log/LogAggregatorError.log', level: 'error' }),
        new winston.transports.File({ filename: './log/Combined.log' })
    ]
});


const ruleEngine = new RuleEngine("*");
logger.log("info", "Service Starting logAggregator v0.1 by j.tretter@gmail.com");
const server = micro(async (req, res) => {
    const js = await json(req);

    try {
        allInputLines = JSON.parse(js);
    } catch (ex) {
        logger.log("error", "Input not in JSON format:" + js);
        send(res, 401, "Input not in JSON Format");
    }

    for(i=0;i<allInputLines.length;i++){
        let theInputLine=allInputLines[i];
        let isWhiteListed = ruleEngine.processData(theInputLine);
        let miniInput = jsonminify(JSON.stringify(theInputLine));

        if (isWhiteListed) {
            logger.log("debug", "Not Whitelisted: " + miniInput);
            fs.appendFileSync("./log/skipped.log", miniInput + "\n");
            process.stdout.write(".");
        } else {
            logger.log("debug", "Not Whitelisted: " + miniInput);
            fs.appendFileSync("./log/issues.log", miniInput + "\n");
            process.stdout.write("!");
        }
    }

    send(res, 200, "OK");
});

server.listen(2222);