PDF Generator Function

reports.js

'use strict'

const chromium = require('chrome-aws-lambda');
const AWS = require('aws-sdk')
const s3 = new AWS.S3();

exports.handler = async (event, context, callback) => {        
    
    let browser = null
    try {
        const ep = await chromium.executablePath
        console.log('executable path ', ep)

        browser = await chromium.puppeteer.launch({
            args: chromium.args,
            defaultViewport: chromium.defaultViewport,
            executablePath: ep,
            headless: chromium.headless,
        })

        const page = await browser.newPage()

        await page.setContent(`<h1>Your awesome PDF report template</h1>`)

        const pdf = await page.pdf({
            path: '/tmp/pdfReport.pdf', // TAKE ATTENTION!!
            format: 'A4',
            printBackground: true,
            margin: { top: 20, left: 20, right: 20, bottom: 20 },
            displayHeaderFooter: true
        })
        
        const params = {
            Body: Buffer.from(pdf), 
            Bucket: "pdf-store", 
            ContentType: "application/pdf",
            ContentDisposition: 'inline',
            Key: "pdfReport.pdf"
        }

        await s3.putObject(params, (err, data) => {
            if (err) {
                console.log('Error: ', err)
            } else {
                console.log('Stored: ', data)

            }
        })

        const httpResponse = {
          statusCode: 200,
          headers: {
              "Content-Type": "application/json",
              "Content-Disposition": "attachment; filename=test.pdf",
              "X-Requested-With": '*',
              "Access-Control-Allow-Headers": 'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Requested-With',
              "Access-Control-Allow-Origin": '*',
              "Access-Control-Allow-Methods": 'GET, OPTIONS',
              "Access-Control-Allow-Credentials": true
          },
          body: 'Done!',
          isBase64Encoded: true
      };

        callback(null, httpResponse)
    } 
    
    catch(error) {
        console.log('Error: ', error)
    }

    finally {
        console.log('In the end...')
        if (browser !== null) {
            await browser.close()
            // process.exit()
        }
    }

}