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Project Description

Create JSON API:s with HMAC authentication and Django form-validation.

Installation

Install django-formapi in your python environment

$ pip install django-formapi

Add formapi to your INSTALLED_APPS setting.

INSTALLED_APPS = (
    ...
    'formapi',
)

Add formapi.urls to your urls.py.

urlpatterns = patterns('',
    ...
    url(r'^api/', include('formapi.urls')),
)

Usage

Go ahead and create a calls.py.

class DivisionCall(calls.APICall):
    """
    Returns the quotient of two integers
    """
    dividend = forms.FloatField()
    divisor = forms.FloatField()

    def action(self, test):
        dividend = self.cleaned_data.get('dividend')
        divisor = self.cleaned_data.get('divisor')
        return dividend / divisor

API.register(DivisionCall, 'math', 'divide', version='v1.0.0')

Just create a class like your regular Django Forms but inheriting from APICall. Define the fields that your API-call should receive. The action method is called when your fields have been validated and what is returned will be JSON-encoded as a response to the API-caller. The API.register call takes your APICall-class as first argument, the second argument is the namespace the API-call should reside in, the third argument is the name of your call and the fourth the version. This will result in an url in the form of api/[version]/[namespace]/[call_name]/ so we would get /api/v1.0.0/math/divide/.

A valid call with the parameters {'dividend': 5, 'divisor': 2} would result in this response:

{"errors": {}, "data": 5, "success": true}

An invalid call with the parameters {'dividend': "five", 'divisor': 2} would result in this response:

{"errors": {"dividend": ["Enter a number."]}, "data": false, "success": false}

Authentication

By default APICalls have HMAC-authentication turned on. Disable it by setting signed_requests = False on your APICall.

If not disabled users of the API will have to sign their calls. To do this they need a secret generate, create a APIKey through the django admin interface. On save a personal secret and key will be generated for the API-user.

To build a call signature for the DivisonCall create a querystring of the calls parameters sorted by the keys dividend=5&divisor=2. Create a HMAC using SHA1 hash function. Example in python:

import hmac
from hashlib import sha1
hmac_sign = hmac.new(secret, urllib2.quote('dividend=5&divisor=2'), sha1).hexdigest()

A signed request against DivisionCall would have the parameters {'dividend': 5, 'divisor': 2, 'key': generated_key, 'sign': hmac_sign}

Documentation

Visit /api/discover for a brief documentation of the registered API-calls.

Release History

Release History

0.2.0

This version

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0.1.0

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0.0.7

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0.0.6

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0.0.5

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0.0.4

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0.0.3

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0.0.2

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0.0.1

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
django-formapi-0.2.0.tar.gz (93.6 kB) Copy SHA256 Checksum SHA256 Source Mar 31, 2015

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