Simple readdir with express server. NODE.JS

app.get

var express = require('express');
var fs = require('fs');
var app = express();


app.get('/logJson', function (req, res) {

  const logsFolder = '/folder/path/';
  fs.readdir(logsFolder, (err, files) => {
    if (err) {
      res.send("[empty]");
      return;
     }
     var lines = [];
     files.forEach(function(filename) {
       var logFileLines = fs.readFileSync (logsFolder + filename, 'ascii').toString().split("\n");
       logFileLines.forEach(function(logFileLine) {
         if(logFileLine.match(/.*KEYWORD*./)) {
           lines.push(logFileLine+'\n');
         }
       })

     })
     
     
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