Line support added

README.rst

@@ -84,6 +84,7 @@ or current ones extended):
     * Kakao_ OAuth2 https://developer.kakao.com
     * `Khan Academy`_ OAuth1
     * Launchpad_ OpenId
+    * Line_ OAuth2
     * Linkedin_ OAuth1
     * Live_ OAuth2
     * Livejournal_ OpenId
@@ -265,6 +266,7 @@ check `django-social-auth LICENSE`_ for details:
 .. _Instagram: https://instagram.com
 .. _Itembase: https://www.itembase.com
 .. _LaunchPad: https://help.launchpad.net/YourAccount/OpenID
+.. _Line: https://line.me/
 .. _Linkedin: https://www.linkedin.com
 .. _Live: https://live.com
 .. _Livejournal: http://livejournal.com

docs/backends/line.rst

@@ -0,0 +1,7 @@
+Line.me
+==========
+
+Fill App Id and Secret in your project settings::
+
+	SOCIAL_AUTH_LINE_KEY = '...'
+	SOCIAL_AUTH_LINE_SECRET = '...'

social/backends/line.py

@@ -0,0 +1,87 @@
+# vim:fileencoding=utf-8
+import requests
+import json
+
+from social.backends.oauth import BaseOAuth2
+from social.exceptions import AuthFailed
+from social.utils import handle_http_errors
+
+
+class LineOAuth2(BaseOAuth2):
+    name = 'line'
+    AUTHORIZATION_URL = 'https://access.line.me/dialog/oauth/weblogin'
+    ACCESS_TOKEN_URL = 'https://api.line.me/v1/oauth/accessToken'
+    BASE_API_URL = 'https://api.line.me'
+    USER_INFO_URL = BASE_API_URL + '/v1/profile'
+    ACCESS_TOKEN_METHOD = 'POST'
+    STATE_PARAMETER = True
+    REDIRECT_STATE = True
+    ID_KEY = 'mid'
+    EXTRA_DATA = [
+        ('mid', 'id'),
+        ('expire', 'expire'),
+        ('refreshToken', 'refresh_token')
+    ]
+
+    def auth_params(self, state=None):
+        client_id, client_secret = self.get_key_and_secret()
+        params = {
+            'client_id': client_id,
+            'redirect_uri': self.get_redirect_uri(),
+            'response_type': self.RESPONSE_TYPE
+        }
+        return params
+
+    def process_error(self, data):
+        error_code = data.get('errorCode') or data.get('statusCode') or data.get('error')
+        error_message = data.get('errorMessage') or data.get('statusMessage') or data.get('error_desciption')
+        if error_code is not None or error_message is not None:
+            raise AuthFailed(self, error_message or error_code)
+
+    @handle_http_errors
+    def auth_complete(self, *args, **kwargs):
+        """Completes login process, must return user instance"""
+        client_id, client_secret = self.get_key_and_secret()
+        code = self.data.get('code')
+
+        self.process_error(self.data)
+
+        try:
+            response = self.request_access_token(
+                self.access_token_url(),
+                method=self.ACCESS_TOKEN_METHOD,
+                params={
+                    'requestToken': code,
+                    'channelSecret': client_secret
+                }
+            )
+            self.process_error(response)
+
+            return self.do_auth(response['accessToken'], response=response, *args, **kwargs)
+        except requests.HTTPError as err:
+            self.process_error(json.loads(err.response.content))
+
+    def get_user_details(self, response):
+        response.update({
+            'fullname': response.get('displayName'),
+            'picture_url': response.get('pictureUrl')
+        })
+        return response
+
+    def get_user_id(self, details, response):
+        """Return a unique ID for the current user, by default from server response."""
+        return response.get(self.ID_KEY)
+
+    def user_data(self, access_token, *args, **kwargs):
+        """Loads user data from service"""
+        try:
+            response = self.get_json(
+                self.USER_INFO_URL,
+                headers={
+                    "Authorization": "Bearer {}".format(access_token)
+                }
+            )
+            self.process_error(response)
+            return response
+        except requests.HTTPError as err:
+            self.process_error(err.response.json())