File Wizard

An open-source file conversion webapp built with ReactJs, Python
and AWS for the HTTP API, Lambda functions and S3 object storage.
Converts .docx files to .pdf

Features

• Website

  • ReactJs App Router
  • Amazon Web Services for backend functionality
  • Support for HTTP API, S3 File Storage, and Lambda functions
  • Edge runtime-ready

• AWS Infrastructure

  • Amazon S3 Allows for object storage and static site hosting
  • API Gateway hosts the HTTP API
  • AWS Lambda for processing JSON and filtering required data
  • Amazon EC2 for provisioning VM instances

Overview

A static site is hosted on S3 with a document upload form. We use API Gateway to create an API which makes a GET request to a Lambda function after the user clicks Upload File on the form.

The API sends a presigned bucket URL for the uploads-bucket. The site then automatically conducts a PUT request to the same bucket with the .docx file data.

Another Lambda function is configured to listen for PUT Object events in the S3 uploads-bucket. It parses the event record for file name and sends a POST request to the Python Flask App performing the document conversion.

An EC2 instance is deployed with an Ubuntu OS image. A python script is setup to run as a background process.

The python microservice converts documents using pandoc package and is exposed as an API using Flask listening for POST requests on a specified port. It downloads and saves the specified file with its ID, uploads the converted file to the output-bucket on S3 and performs cleanup for files saved during runtime.

The static site returns the download link for the converted file from the output-bucket.