index.js

#!/usr/bin/env node

// Example of using API4AI OCR text recognition.
const fs = require('fs')
const path = require('path')
const axios = require('axios').default
const FormData = require('form-data')

// Use 'demo' mode just to try api4ai for free. Free demo is rate limited.
// For more details visit:
//   https://api4.ai

// Use 'rapidapi' if you want to try api4ai via RapidAPI marketplace.
// For more details visit:
//   https://rapidapi.com/api4ai-api4ai-default/api/ocr43/details
const MODE = 'demo'

// Your RapidAPI key. Fill this variable with the proper value if you want
// to try api4ai via RapidAPI marketplace.
const RAPIDAPI_KEY = ''

const OPTIONS = {
  demo: {
    url: 'https://demo.api4ai.cloud/ocr/v1/results',
    headers: { 'A4A-CLIENT-APP-ID': 'sample' }
  },
  rapidapi: {
    url: 'https://ocr43.p.rapidapi.com/v1/results',
    headers: { 'X-RapidAPI-Key': RAPIDAPI_KEY }
  }
}

// Parse args: path or URL to image.
const image = process.argv[2] || 'https://storage.googleapis.com/api4ai-static/samples/ocr-1.png'

// Preapare request: form.
const form = new FormData()
if (image.includes('://')) {
  // Data from image URL.
  form.append('url', image)
} else {
  // Data from local image file.
  const fileName = path.basename(image)
  form.append('image', fs.readFileSync(image), fileName)
}

// Preapare request: headers.
const headers = {
  ...OPTIONS[MODE].headers,
  ...form.getHeaders(),
  'Content-Length': form.getLengthSync()
}

// Make request.
axios.post(OPTIONS[MODE].url, form, { headers })
  .then(function (response) {
    // Print raw response.
    console.log(`💬 Raw response:\n${JSON.stringify(response.data)}\n`)
    // Parse response and print recognized text.
    for (const i in response.data.results) {
      const result = response.data.results[i]
      let pageTip = ''
      if (Object.hasOwn(result, 'page')) {
        pageTip = ` on page ${result.page}`
      }
      const text = result.entities[0].objects[0].entities[0].text
      console.log(`💬 Recognized text${pageTip}:\n${text}\n`)
    }
  })