Include posters in Twitter notifications

* Also cleanup Facebook

lib/requests_oauthlib/compliance_fixes/facebook.py

@@ -0,0 +1,33 @@
+from json import dumps
+try:
+    from urlparse import parse_qsl
+except ImportError:
+    from urllib.parse import parse_qsl
+
+from oauthlib.common import to_unicode
+
+
+def facebook_compliance_fix(session):
+
+    def _compliance_fix(r):
+        # if Facebook claims to be sending us json, let's trust them.
+        if 'application/json' in r.headers.get('content-type', {}):
+            return r
+
+        # Facebook returns a content-type of text/plain when sending their
+        # x-www-form-urlencoded responses, along with a 200. If not, let's
+        # assume we're getting JSON and bail on the fix.
+        if 'text/plain' in r.headers.get('content-type', {}) and r.status_code == 200:
+            token = dict(parse_qsl(r.text, keep_blank_values=True))
+        else:
+            return r
+
+        expires = token.get('expires')
+        if expires is not None:
+            token['expires_in'] = expires
+        token['token_type'] = 'Bearer'
+        r._content = to_unicode(dumps(token)).encode('UTF-8')
+        return r
+
+    session.register_compliance_hook('access_token_response', _compliance_fix)
+    return session