Reading and Writing Data Using the Docparser API

Hey there, fellow JavaScript devs! Ready to dive into the world of document parsing and data syncing? Let's get our hands dirty with the Docparser API and build some killer user-facing integrations.

The Lowdown on Docparser

Docparser is your go-to tool for extracting structured data from documents. It's like having a super-smart intern who never sleeps and always gets the data right. When it comes to user-facing integrations, syncing this data seamlessly is crucial. Trust me, your users will thank you for it.

Getting Started with Docparser API

First things first, let's get you set up:

npm install docparser-node

Now, let's authenticate:

const Docparser = require('docparser-node');
const client = new Docparser('YOUR_API_KEY');

Pro tip: Keep that API key safe! Use environment variables to avoid accidentally sharing it with the world.

Reading Data Like a Boss

Time to fetch some parsed documents:

async function getParsedDocs() {
  try {
    const docs = await client.getDocuments('YOUR_PARSER_ID');
    console.log(docs);
  } catch (error) {
    console.error('Oops!', error);
  }
}

Want specific fields? No problem:

const fields = await client.getFields('YOUR_PARSER_ID', 'YOUR_DOCUMENT_ID');

Writing Data: Upload and Conquer

Uploading new docs is a breeze:

const fs = require('fs');

async function uploadDoc() {
  try {
    const file = fs.readFileSync('path/to/your/doc.pdf');
    const result = await client.uploadDocument('YOUR_PARSER_ID', file);
    console.log('Upload successful:', result);
  } catch (error) {
    console.error('Upload failed:', error);
  }
}

Real-time Syncing: Webhooks to the Rescue

Set up webhooks to keep your data fresh:

const express = require('express');
const app = express();

app.post('/docparser-webhook', express.json(), (req, res) => {
  const event = req.body;
  // Handle the event
  console.log('New document parsed:', event.document_id);
  res.sendStatus(200);
});

app.listen(3000, () => console.log('Webhook server running'));

Handling Errors and Rate Limits

Don't let errors catch you off guard:

try {
  // Your API call here
} catch (error) {
  if (error.response && error.response.status === 429) {
    console.log('Whoa there! Slow down, we hit a rate limit.');
    // Implement backoff strategy
  } else {
    console.error('Something went wrong:', error.message);
  }
}

Optimizing for Speed

Caching is your friend:

const NodeCache = require('node-cache');
const cache = new NodeCache({ stdTTL: 600 }); // 10 minutes

async function getCachedData(key, fetchFunction) {
  let data = cache.get(key);
  if (data === undefined) {
    data = await fetchFunction();
    cache.set(key, data);
  }
  return data;
}

Keeping It Secure

Always validate those webhook payloads:

const crypto = require('crypto');

function validateWebhook(payload, signature, secret) {
  const hmac = crypto.createHmac('sha256', secret);
  const digest = hmac.update(payload).digest('hex');
  return crypto.timingSafeEqual(Buffer.from(signature), Buffer.from(digest));
}

Testing: Because We're Professionals

Unit test like you mean it:

const { expect } = require('chai');
const sinon = require('sinon');

describe('Docparser API', () => {
  it('should fetch documents successfully', async () => {
    const stub = sinon.stub(client, 'getDocuments').resolves([{ id: '123' }]);
    const docs = await getParsedDocs();
    expect(docs).to.have.lengthOf(1);
    expect(docs[0].id).to.equal('123');
    stub.restore();
  });
});

Wrapping Up

And there you have it! You're now equipped to build robust, efficient, and secure integrations with the Docparser API. Remember to keep your code clean, your errors handled, and your data synced. Your users will love you for it.

Happy coding, and may your parsers always be accurate and your integrations smooth!