Azure Cognitive Services Computer Vision Read API Using Axios

index.js

const axios = require('axios').default;
const { setTimeout } = require('timers/promises');

module.exports = async function (context, req) {
  // Replace your_sub_domain with your Computer Vision's endpoint sub domain
  const analyzeURL =
    'https://your_sub_domain.cognitiveservices.azure.com/vision/v3.2/read/analyze';

  // Get imageURL from query string
  // Example: https://raw.githubusercontent.com/Azure-Samples/cognitive-services-sample-data-files/master/ComputerVision/Images/printed_text.jpg
  const imageURL = req.query.imageURL;

  // Set apiKey to your Computer Vision's key
  const apiKey = 'your_key';

  let res = await axios.post(
    analyzeURL,
    {
      url: imageURL,
    },
    {
      headers: {
        'Ocp-Apim-Subscription-Key': apiKey,
      },
    }
  );

  const analyzeResultsURL = res.headers['operation-location'];

  // Wait for one second
  await setTimeout(1000);

  while (true) {
    res = await axios.get(analyzeResultsURL, {
      headers: {
        'Ocp-Apim-Subscription-Key': apiKey,
      },
    });

    if (res.data.status === 'succeeded') {
      break;
    }

    // Keep waiting for one second until status = succeeded
    await setTimeout(1000);
  }

  context.res = {
    body: res.data,
  };
};