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"""
OSM OAuth support.
This adds support for OSM OAuth service. An application must
be registered first on OSM and the settings OSM_CONSUMER_KEY
and OSM_CONSUMER_SECRET must be defined with the corresponding
values.
More info: http://wiki.openstreetmap.org/wiki/OAuth
"""
from xml.dom import minidom
from social_auth.backends import ConsumerBasedOAuth, OAuthBackend, USERNAME
# OSM configuration
OSM_SERVER = 'http://www.openstreetmap.org/oauth'
OSM_REQUEST_TOKEN_URL = '%s/request_token' % OSM_SERVER
OSM_ACCESS_TOKEN_URL = '%s/access_token' % OSM_SERVER
OSM_AUTHORIZATION_URL = '%s/authorize' % OSM_SERVER
OSM_USER_DATA_URL = 'http://api.openstreetmap.org/api/0.6/user/details'
class OSMBackend(OAuthBackend):
"""OSM OAuth authentication backend"""
name = 'openstreetmap'
EXTRA_DATA = [
('username', 'username'),
]
def get_user_details(self, response):
"""Return user details from OSM account"""
return {USERNAME: response.get('username')}
def get_user_id(self, details, response):
"""Return the user id, both email and username can change in OSM."""
return response['id']
class OSMAuth(ConsumerBasedOAuth):
"""OSM OAuth authentication mechanism"""
AUTHORIZATION_URL = OSM_AUTHORIZATION_URL
REQUEST_TOKEN_URL = OSM_REQUEST_TOKEN_URL
ACCESS_TOKEN_URL = OSM_ACCESS_TOKEN_URL
AUTH_BACKEND = OSMBackend
SETTINGS_KEY_NAME = 'OSM_CONSUMER_KEY'
SETTINGS_SECRET_NAME = 'OSM_CONSUMER_SECRET'
def user_data(self, access_token):
"""Return user data provided"""
url = OSM_USER_DATA_URL
request = self.oauth_request(access_token, url)
response = self.fetch_response(request)
doc = minidom.parseString(response)
user_node = doc.getElementsByTagName('user')[0]
username = user_node.getAttribute('display_name')
user_id = user_node.getAttribute('id')
return {
"username": username,
"id": user_id
}
# Backend definition
BACKENDS = {
'openstreetmap': OSMAuth,
}