PdfEditor/server.js

const fs = require('fs')
const express = require('express')
const multer = require('multer')
const childProcess = require('child_process')
const PDF2HTMLEX_PATH = 'C:/Users/alan.colon/Downloads/pdf2htmlEX-win32-0.14.6-upx-with-poppler-data/pdf2htmlEX.exe'

const upload = multer({
    dest: 'temp/'
})

const app = express()

app.use(express.static('./public'))

app.post('/edit', upload.single('document'), (req, res) => {
    childProcess.exec(`"${PDF2HTMLEX_PATH}" "${req.file.path}" "${req.file.path}.html"`, (err, stdout, stderr) => {
        if (err) {
            res.status(500).send(`<pre>${err}\n\n${stdout}\n\n${stderr}</pre>`)
        } else {
            fs.readFile(`${req.file.path}.html`, 'utf8', (err, data) => {
                if (err) {
                    res.status(500).send(`<pre>${err}\n\n${stdout}\n\n${stderr}</pre>`)
                } else {
                    res.status(200).send(data.replace('</head>', `
                        <script src="edit.js" type="text/javascript"></script>
                        <link rel="stylesheet" href="edit.css" />
                    </head>`))
                }
            })
        }
    })
})

app.listen('3003')
console.log('http://localhost:3003')