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simple Django app to make your backend serve as a proxy for the postcode.nl REST-API

Project description

Django Postcode Proxy
=========================

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Simple proxy class to integrate Dutch 'postcode/huisnr' address verification in your Django application.
This is done using the postcode.nl REST-API at [https://api.postcode.nl](https://api.postcode.nl). For documentation
regarding API endpoints also check this url.

The API also provides an endpoint for information validation, enrichment and fraude risk check. See docs for details.

---

Install
=========

$ pip install django-postcodepy-proxy



Quick start
-----------------

1. Add 'postcodepy_proxy' to your INSTALLED_APPS setting like this::

INSTALLED_APPS= (
...
'postcodepy_proxy',
)

2. Add the config part for the proxy::

POSTCODEPY = {
"AUTH" : {
"API_ACCESS_KEY" : "<the key you got from postcode.nl>",
"API_ACCESS_SECRET" : "<the secret you got from postcode.nl>",
},
}

In your app ...
================

Derive a class from the *PostcodepyProxyView* class and implement your own logic like the 2 simple examples below for HTML and JSON rendering.

## Simple HTML rendering

from django.shortcuts import render

# Create your views here.

from postcodepy_proxy.views import PostcodepyProxyView
from postcodepy import postcodepy

class PCDemoHTMLView( PostcodepyProxyView ):
template_name = "postcodeproxy.html"

def get(self, request, *args, **kwargs):
rv = super(PCDemoHTMLView, self).get(request, *args, **kwargs)
return render(request, self.template_name, rv)


## JSON rendering

Most likely is that you want JSON rendering for XHR-io in your application. Implement exception-handling that suits your needs.


from django.http import HttpResponse
from postcodepy.postcodepy import PostcodeError
import json

class PCDemoJSONView( PostcodepyProxyView ):
def get(self, request, *args, **kwargs):
rv = None
try:
rv = super(PCDemoJSONView, self).get(request, *args, **kwargs)
except PostcodeError, e:
# Pass the exceptioninformation as response data
rv = e.response_data

return HttpResponse( json.dumps(rv), content_type="application/json")


## Signal Check

Use the SignalProxyView to integrate the Signal API in your application.

from postcodepy_proxy.views import SignalProxyView
from postcodepy_proxy.signalapi import SignalRequestData
from django.http import HttpResponse
from postcodepy.postcodepy import PostcodeError
import json

class PCSignalJSONView( SignalProxyView ):

def post(self, request, *args, **kwargs):
"""
perform the Signal lookup via the API-call
"""
rv = None
try:
# Create a structure representing a valid signal-api-request, as specified at api.postcode.nl
sar = SignalRequestData(request.POST)
sar = sar()
if sar.has_key('csrfmiddlewaretoken'):
del sar['csrfmiddlewaretoken']
rv = super(PCSignalJSONView, self).get(request, sar=sar, **kwargs)
except PostcodeError, e:
# Pass the exceptioninformation as response data
rv = e.response_data

return HttpResponse( json.dumps(rv, indent=4), content_type="application/json")


## Route the requests

# Postcode urls
url(r'^jsonpostcode/(?P<postcode>[\d]{4}[a-zA-Z]{2})/(?P<houseNumber>[\d]+)/$', views.PCDemoJSONView.as_view() ),
url(r'^jsonpostcode/(?P<postcode>[\d]{4}[a-zA-Z]{2})/(?P<houseNumber>[\d]+)/(?P<houseNumberAddition>[A-Za-z]+)/$', views.PCDemoJSONView.as_view() ),
# Signal urls
# signal.html with some form that enables you to post the information for the request via AJAX/JSON to
# the jsonsignal url and fetch the response
url(r'^signal/$', TemplateView.as_view(template_name="signal.html")),
url(r'^jsonsignal/$', views.PCSignalJSONView.as_view() ),

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