schwartzmx / django-s3file

A lightweight file upload input for Django and Amazon S3

django-s3file

A lightweight file upload input for Django and Amazon S3.

Django-S3File allows you to upload files directly AWS S3 effectively bypassing your application server. This allows you to avoid long running requests from large file uploads. This is particuallary helpful for if you run your service on AWS Lambda or Heroku where you have a hard request limit.

Features

• lightweight: less 200 lines
• no JavaScript or Python dependencies (no jQuery)
• easy integration
• works just like the built-in

For the Nerds

Installation

Make sure you have Amazon S3 storage setup correctly.

Just install S3file using pip.

pip install django-s3file

Add the S3File app and middleware in your settings:

INSTALLED_APPS = (
    '...',
    's3file',
    '...',
)

MIDDLEWARE = (
    '...',
    's3file.middleware.S3FileMiddleware',
    '...',
)

Usage

S3File automatically replaces Django’s ClearableFileInput widget, you do not need to alter your code at all.

The ClearableFileInput widget is only than automatically replaced when the DEFAULT_FILE_STORAGE setting is set to django-storages’ S3Boto3Storage.

Setting up the AWS S3 bucket

Upload folder

S3File uploads to a single folder. Files are later moved by Django when they are saved to the upload_to location.

It is recommended to setup expiration for that folder, to ensure that old and unused file uploads don’t add up and produce costs.

The default folder name is: tmp/s3file You can change it by changing the S3FILE_UPLOAD_PATH setting.

CORS policy

You will need to allow POST from all origins. Just add the following to your CORS policy.

<CORSConfiguration>
    <CORSRule>
        <AllowedOrigin>*</AllowedOrigin>
        <AllowedMethod>POST</AllowedMethod>
        <AllowedMethod>GET</AllowedMethod>
        <MaxAgeSeconds>3000</MaxAgeSeconds>
        <AllowedHeader>*</AllowedHeader>
    </CORSRule>
</CORSConfiguration>

Uploading multiple files

Django does have limited support for uploading multiple files. S3File fully supports this feature. The custom middleware makes ensure that files are accessible via request.FILES, even though they have been uploaded to AWS S3 directly and not to your Django application server.