django-broadcast

Overview

Video broadcasting support for Django apps. Designed to abstract provisioning backend storage for video streaming clients behind simple "Start Stream" and "Stop Stream" API calls.

API

These endpoints are all POST. Parameters are URL encoded for request, and JSON encoded for response.

/stream/start/

Request (url encoded)

{
    'type' : 'hls' (this is the only option currently supported)
	'name' : 'some_name' (optional)
}

e.g: https://endpoint.tld/stream/start/?name=some_name&type=hls

Response (json encoded)

{
	'stream' : {
		'id' : 'stream_id', (generally a UUID or similar)
		'name' : 'some_name',
		'start_date' : '2015-10-22 15:27:40', (time always in GMT)
	},
	'endpoint': {
		'S3': {
			'aws_access_key_id': 'key'
			'aws_secret_access_key': 'secret',
			'aws_session_token': 'token',
			'aws_expiration': 3600.0 // in seconds
			's3_bucket_name': 'bucket',
			's3_bucket_path': 'path',
			's3_bucket_region': 'us-west-1' // valid amazon region string
		}
		// future endpoints could go here, like RTMP, WebRTC, etc
	}
}

/stream/stop/

Request (url encoded)

{
	'id' : 'stream_id'
}

e.g: https://endpoint.tld/stream/start/?id=B8C2401D-B2F8-47CD-90BD-53B608D47F3F

Response (json encoded)

{
    'stream': {
        'id' : 'stream_id',
        'name' : 'some_name',
        'start_date' : '2015-10-22 15:27:40', (time always in GMT)
        'stop_date' : '2015-10-22 16:27:40', (time always in GMT)
    }
}

Usage

We currently recommend your hosting Django application setup the URL and views for /stream/start and /stream/stop. Within those views, you can yield to built-in methods to handle most of the work for you while leaving you ultimate control over the request and response formats.

For example, your /stream/start view may look like:

    from django.http import JsonResponse
    from django_broadcast.api import start_hls_stream, prepare_start_hls_stream_response

    def your_start_stream_view(request):

        # Do request validation, etc.

        # Prepare for new Stream : This handles creating storage credentials
        # and preparing data needed by mobile client
        start_result = start_hls_stream(request=request)
        # start_result is a python dictionary with format:
        # {'stream': ..., 'storage': ...}

        # Use built-in function for standard dictionary representation
        # as specified in API section above.
        serialized_response = prepare_start_hls_stream_response(start_result)

        return JsonResponse({'success': true, 'response': serialized_response})

Requirements

• Python (2.7, 3.3, 3.4)
• Django (1.6, 1.7, 1.8)
• Django REST Framework (2.4, 3.0, 3.1)

Installation

Install using pip

$ pip install django-broadcast

Setup

Currently django-broadcast supports an S3 backend:

BROADCAST_SETTINGS = {
    "STREAM_MODEL": "home.Stream",
    "S3": {
        "AWS_ACCESS_KEY_ID": os.environ.get('DJ_BROADCAST_AWS_ACCESS_KEY', ''),
        "AWS_SECRET_ACCESS_KEY": os.environ.get('DJ_BROADCAST_AWS_ACCESS_SECRET', ''),
        "BUCKET": os.environ.get('DJ_BROADCAST_S3_BUCKET', '')
    }
}

Testing

Install testing requirements.

$ pip install -r requirements.txt

Run with runtests.

$ ./runtests.py

You can also use the excellent tox_ testing tool to run the tests against all supported versions of Python and Django. Install tox globally, and then simply run:

$ tox