AWS lambda PDF Filler integration

I am new to AWS. Can anyone tell me how to integrate PDFFiller using AWS lambda. I have seen one url. enter link description here

It is very easy to understand. But I don't know how to integrate. I did R&D but didn't get any urls. Can anyone provide some solutions or urls.

Thanks in advance.

See Building Lambda functions with NodeJs

We can deploy the lambda with dependencies as follows

1 - Initialise the Node.js Project

npm init

2 - Install the PdfFiller package

npm install pdffiller --save

3 - Write your index.js file

const pdfFiller = require('pdffiller');

exports.handler = async function (event, context) {

    const sourcePDF = 'sample.pdf';
    var destinationPDF =  "/tmp/test_complete.pdf";

    var data = {
        "demo" : "demo-val"
    };

    pdfFiller.fillFormWithOptions( sourcePDF, destinationPDF, data, true,"/tmp",function(err) {
        if (err) throw err;
        console.log("In callback (we're done).");
    });
     


    // TODO implement
    const response = {
        statusCode: 200,
        body: "success",
    };
    return response;
};

4 - Make a zip

You'll have project structure as

~/my-function
├── index.js
└── node_modules
    ├── pdffiller

Make your entire project as zip (should include node_modules)

5 - Deploying

And finally you can deploy it. See how to deploy as zip

Factors to ensure

• sourcePDF : Currently, the source pdf has been put within the project itself. This is not a perfect method; you may load it from another source, such as s3, external storage, etc.

• destinationPDF , /tmp as prefix : The Lambda execution environment provides a file system for your code to use at /tmp. This space has a fixed size of 512 MB. You can attach file system with your lambda when you need to store the destination pdf See. Or another sources such as s3.

• Why used fillFormWithOptions : As the package pdffiller creating a temporary pdf file,(see index.js file) unlike with the other fie system,lambda uses /tmp for storing the files (without any file-system attachment).
  It is necessary to mention the temporary pdf generate path with lambda. Else, the execution will fail at here, as it couldn't be able to create the temp pdf file.

Reference Links :

• Building Lambda functions with NodeJs
• Choosing between AWS Lambda data storage options in web apps
• Amazon S3 Node.js Examples
• Deploy Node.js Lambda functions with .zip file archives
  
• AWS Serverless Application Model

Hope this helps