nowi5 / file-preview-api

A phyton API to create previews / thumbnails from files via libreoffice and unoserver

Introduction

The Thumbnail / File Preview API creates high-resolution thumbnail images from any file you upload to it.

Installation

We recommend that you use the provided Dockerfile, as the package requires Libreoffice, Unosever etc. Install Docker before and familiarize yourself with it.

 docker-compose build --no-cache
 docker-compose up

Authentication

For authenticating with the API, users must provide a simple API Key. This key can be included in: Headers: X-API-Key POST request body (as JSON): key GET parameters: key Please ensure that the provided API Key is present in the config.py file for the request to be authenticated, for example

PRIVATE_API_KEYS = {
    'username1': 'your-api-key-1',
    'username2': 'your-api-key-2'
}

For example

http://127.0.0.1:5000/api/v1/preview?key=YOUR_KEY

How to use

GET /api/v1/preview/

Shows if the libreoffice and unoserver is running. Should be the first call to start those. May takes over 20 seconds.

POST /api/v1/preview/

Uploads a file and returns a JSON include the base64 file. Expecting file as Multipart form data.

POST /api/v1/preview/upload

Uploads a file and returns a unique identifier for the uploaded file. Expecting file as Multipart form data.

POST /api/v1/preview/convert

Converts a previously uploaded file to the desired format.

GET /api/v1/preview/download/

Downloads the converted file based on its unique ID and desired format. Expecting a unique_id and file_type given.

Misc

Unoserver

Please have a look to Unoserver documentation https://github.com/unoconv/unoserver/ to lern more about the file conversion.

Flask skeleton

We used the following Flask skeleton, explaination and Medium link : https://beranger.medium.com/deploy-a-python-flask-server-using-google-cloud-run-d47f728cc864

Deploy :

We deploy the application on Google Cloud. Feel free to do the same:

gcloud run deploy flask-file-preview --region=europe-west2 --source=$(pwd) --allow-unauthenticated --project=[YOUR_GC_PROJECT_ID]