joist 0.0.2

A django widget library for direct S3 uploads

joist

Joist is a Django Widget library for providing a direct S3 bucket upload via the browser instead of going through the server. It extends the django-storages library for the S3 file storage

Installation

pip install django-storages joist

by source:

pip install -e 'git+https://github.com/danlamanna/joist.git#egg=joist'

Configuration

Joist depends on the django-storages S3 config (see https://django-storages.readthedocs.io/en/latest/backends/amazon-S3.html), following settings are used

Key	Description
AWS_ACCESS_KEY_ID	Your Amazon Web Services access key, as a string.
AWS_SECRET_ACCESS_KEY	Your Amazon Web Services secret access key, as a string.
AWS_S3_REGION_NAME	Name of the AWS S3 region to use (eg. eu-west-1)
AWS_STORAGE_BUCKET_NAME	Your Amazon Web Services storage bucket name, as a string. (required)

Additional settings

Key	Description
JOIST_UPLOAD_STS_ARN	The STS Arn Role to use (required)
JOIST_UPLOAD_DURATION	The duration the upload token should be valid in seconds (default: 60*60*12 = 12h)
JOIST_UPLOAD_PREFIX	Prefix where files should be stored (default: '')
JOIST_API_BASE_URL	API prefix where the server urls are hosted (default: /api/joist)

Usage

Setup

Add joist to the list of installed apps:

settings.py:

INSTALLED_APPS = [
    ...
    'rest_framework',
    'rest_framework.authtoken',
    'joist',
]

Moreover, since the field requires additional REST endpoints one has to use add them to the urlpatterns:

urls.py

urlpatterns = [
    ...
    path('api/joist/', include('joist.urls')),
]

Model Definition:

instead of

photo = models.FileField()

use

from joist.models import S3FileField

photo = S3FileField()

The result is that once the user select a file in the file chooser, it will be automatically uploaded to S3 on the client side.

Signals

Joist sends out two signals when its REST api is called:

joist_upload_prepare(name: str, object_key: str)
joist_upload_finalize(name: str, object_key: str, status: string)

Development Environment

Requirements

• Terraform
• AWS CLI
• Python 3.7
• node

Init AWS

login to AWS Concole and create an API access key

aws configure

Run Terraform

cd terraform
terraform init
terraform workspace new <NAME>
terraform apply

Create env File

cd terraform
terraform output > ../example/.env

Note:

• edit the .env file and remove the whitespaces around the = characters

Init Django and Python Repo

pipenv --python=3
pipenv install -r requirements.txt example/requirements.txt
pip install -e .

cd example
./manage.py migrate
./manage.py createsuperuser

Init Repo Pre Commits

pipenv shell
pip install pre-commit
pre-commit install

Init Widget Client

cd client
npm install
npm run dev

Init Test Vue Client

cd example-client
npm install

TODO

cd example
./manager.py runserver

--> run at http://localhost:8000 and http://localhost:8000/admin

Example blob forms:

• http://localhost:8000/
• http://localhost:8000/new/
• http://127.0.0.1:8000/admin/blobs/blob

cd example-client
npm run serve

--> run at http://localhost:8080

Release

pipenv shell
pip install bumpversion
bumpversion minor

TODO: npm release