index.js

const express = require('express')
const superagent = require('superagent')
const cookieParser = require('cookie-parser')
// const redis = require('redis')
const { createWorker, createScheduler } = require('tesseract.js')

const app = express()
app.use(express.json())
app.use(express.urlencoded({ extended: true }))
app.use(cookieParser())
app.use(express.json({ limit: '50mb' }))
app.use(express.urlencoded({ limit: '50mb', extended: true, parameterLimit: 50000 }))

// setup queue

// const bullQueue = new Queue('', {
//     redis: {
//         port: 15957,
//         host: process.env.REDISURL,
//         password: process.env.REDISPASSWORD
//     }
// })

// app.set('bullQueue', bullQueue)

// const redisCache = redis.createClient({
//     url: `redis://${process.env.REDISURL}`,
//     password: process.env.REDISPASSWORD,
//     tls: true
// })
// app.set('redisCache', redisCache)


// tesser queue
async function initTesseractQuee(app) {
    // 2 works = ability to handle 2 jobs at once; no speed difference on 1 job
    const scheduler = createScheduler()
    const worker = createWorker()
    await worker.load()
    await worker.loadLanguage() // default english
    await worker.initialize()   // default english
    scheduler.addWorker(worker)
    const worker2 = createWorker()
    await worker2.load()
    await worker2.loadLanguage() // default english
    await worker2.initialize()  // default english
    scheduler.addWorker(worker2)
    app.set('tesseractScheduler', scheduler)
}
initTesseractQuee(app)


// setup universal useragent

superagent
    .get('https://omahaproxy.appspot.com/win')
    .end((err, res) => {
        if (err) console.error(err)
        app.set('useragent', `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/${res.text.substring(0, res.text.indexOf('.'))}.0.0.0 Safari/537.36`)
    })


// set up routes
app.use('/ocr', require('./routes/ocr'))
app.use('/get', require('./routes/get'))
app.use('/heartbeat', require('./routes/heartbeat'))
app.use('/sendgridreceive', require('./routes/sendgridreceive'))

var port = process.env.PORT
if (port == null || port === '') {
    port = 8080
}
app.listen(port, () => {
    console.log(`Listening at http://localhost:${port}`)
})