django-eremaea2

django-eremaea2 is a simple Django application to store and manage webcam image snapshots. The application is built on top of django-rest-framework and provides REST API to access the files.

There are three kind of resources available through REST API interface. A collection is a collection of snapshots. A snapshot is image file in essence. For any snapshot there is a retention policy associated with to specify how long store the file.

Installation

The following prerequisites are required to operate django-eremaea2:

• django-rest-framework - powerful and flexible toolkit that makes it easy to build Web APIs.
• dj-inmemorystorage - a non-persistent in-memory data storage backend for Django (required for testing).

To use django-eremaea2 in your django project, include the following code into your settings.py:

INSTALLED_APPS = (
     #...
    'rest_framework',
    'eremaea',
)

Into your urls.py you have to add the following:

urlpatterns = patterns('',
    #...
    url(r'^eremaea/', include('eremaea.urls')),
)

Configuration

The whole configuration is stored into the project database, there is not separate dedicated config file.

The RetentionPolicy model has two parameters: a lookup field name and duration that specifies time-to-live for associated objects. To perform actual cleanup a POST request to the endpoint http://example.com/eremaea/retention_policies/{name}/purge is required. The Collection model has two parameters: a lookup field name and default_retention_policy. The Snapshot model has the following field: associated collection and retention_policy, file object, and auto-now date. New images are uploaded by POST request to the endpoint http://example.com/eremaea/snapshots/?collection=collection_name&retention_policy=retention_policy_name. The latest query parameter is optional one.

The other ways to configure the application are Django fixtures, Django admin interface, django-rest-framework web browsable interface, and REST API itself.

Authentication and permissions

You may utilise all possible options provided by django-rest-framework. See Tutorial for reference.

Caching

You may utilise all caching mechanisms provided by Django framework. See Django's cache framework.

Feedback

If you have any questions, issues, or pull-requests, you are welcome to use GitHub infrastructure.

License

Copyright (c) 2016, Matwey V. Kornilov

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.