webservices 0.7

Django

We assume you have a setting API_KEYS which is a dictionary of public keys mapping to private keys.

myapi/urls.py:

from django.conf.urls import url, patterns
from webservices.sync import provider_for_django
from myapi.views import HelloProvider

urlpatterns = patterns('',
    url(r'hello/$', provider_for_django(HelloProvider())),
)

Your myapi/views.py:

from django.conf import settings
from webservices.models import Provider

class HelloProvider(Provider):
    def get_private_key(self, public_key):
        return settings.API_KEYS.get(public_key)

    def provide(self, data):
        name = data.get('name', 'world')
        return {'greeting': u'hello %s' % name}

Flask

app.py:

from flask import Flask
from webservices.sync import provider_for_flask
from webservices.models import Provider

app = Flask(__name__)

API_KEYS = {
    'publickey': 'privatekey', # your keys here
}

class HelloProvider(Provider):
    def get_private_key(self, public_key):
        return API_KEYS.get(public_key)

    def provide(self, data):
        name = data.get('name', 'world')
        return {'greeting': u'hello %s' % name}

provider_for_flask(app, '/hello/', HelloProvider())

Twisted

app.py:

from twisted.internet import reactor
from twisted.web.server import Site
from webservices.async import provider_for_twisted
from webservices.models import Provider

API_KEYS = {
    'publickey': 'privatekey', # your keys here
}

class HelloProvider(Provider):
    def get_private_key(self, public_key):
        return API_KEYS.get(public_key)

    def provide(self, data):
        name = data.get('name', 'world')
        return {'greeting': u'hello %s' % name}

resource = provider_for_twisted(HelloProvider())

site = Site(resource)
reactor.listenTCP(80, site)
reactor.run()

Noticed how the provider is basically the same for all three (other than get_private_key)? Neat, right?

Handling errors

To log errors (for example using raven) you can implement the report_exception method on Provider classes. This method is called whenever the provide method throws an exception. It takes no arguments.

Synchronous

To consume that code (assuming it’s hosted on ‘https://api.example.org’):

from webservices.sync import SyncConsumer

consumer = SyncConsumer('https://api.example.org', 'mypublickey', 'myprivatekey')
result = consumer.consume('/hello/', {'name': 'webservices')
print result # prints 'hello webservices'

Asynchronous

Same as above, but async:

from webservices.async import TwistedConsumer
from twisted.internet import reactor

def callback(result):
    print result # prints 'hello webserivces'
    reactor.stop()

consumer = TwistedConsumer('https://api.example.org', 'mypublickey', 'myprivatekey')
deferred = consumer.consume('/hello/', {'name': 'webservices')
deferred.addCallback(callback)

reactor.run()

Data Source Name

You can create consumers from Data Source Names (eg 'http://public_key:private_key@api.example.org') using the from_dsn classmethod on consumers.

Example:

consumer = SyncConsumer.from_dsn(’https://public_key:private_key@api.example.org’)