serverless-pdf-filler

A Lambda function that utilises pdf-lib to fill out PDF form fields in an adobe acrobat form, and uses QPDF to correct the PDF output.

• Reads template key & form values from incoming request
• Retrieves template from S3 bucket via template key
• Fills form fields using pdf-lib
• Calls qpdf to correct PDF output
• Returns filled PDF as a base64 encoded string

Installation & Execution instructions

To run:

yarn install // Install Deps
make local-pdf-service // Start the local service

To invoke:

make local-lambda-curl // Invokes the lambda and outputs to `./tmp` as `out****.json`
make b64-to-pdf // Converts lambda output to a PDF `./out/final_****.pdf`

To test:

The following command will run the unit tests.

yarn run test:unit tests

The following command will run the unit tests, and then start the app, wait for it to load and run the integration tests.

yarn run test:all

It will also output each PDF template filled in to ./tmp/filled_****.pdf And the QPDF output will be at ./tmp/fixed_****.pdf

Packaging Runtime Dependencies

Generate the layer for running pdf-lib

Run make layer-pdflib

Generate the layer for running qpdf

Run make layer-qpdf-zip