provide some deatils on the current user. Assure we can get them consistently.

communicator/__init__.py

@@ -14,6 +14,8 @@ from flask_sqlalchemy import SQLAlchemy
 from sentry_sdk.integrations.flask import FlaskIntegration
 from webassets import Bundle
 
+from communicator.services.user_service import UserService
+
 logging.basicConfig(level=logging.INFO)
 
 # API, fully defined in api.yml
@@ -149,14 +151,9 @@ def list_imported_files_from_ivy():
 
 @app.route('/sso')
 def sso():
+    user = UserService().get_user_info()
     response = ""
-    response += "<h1>Headers</h1>"
-    response += "<ul>"
-    for k, v in request.headers:
-        response += "<li><b>%s</b> %s</li>\n" % (k, v)
-    response += "<h1>Environment</h1>"
-    for k, v in request.environ:
-        response += "<li><b>%s</b> %s</li>\n" % (k, v)
+    response += f"<h1>Current User: {user.display_name} ({user.uid})</h1>"
     return response
 
 # Access tokens

communicator/models/user.py

@@ -0,0 +1,5 @@
+
+class User:
+    def __init__(self, uid, display_name):
+        self.uid = uid
+        self.display_name = display_name

communicator/services/user_service.py

@@ -0,0 +1,34 @@
+from flask import request
+
+from communicator.errors import CommError
+from communicator.models.user import User
+
+
+class UserService(object):
+    """Provides details about the current User as read in from Shibboleth headers """
+    # ----------------------------------------
+    # Shibboleth Authentication Headers
+    # ----------------------------------------
+    # X-Remote-Cn: Daniel Harold Funk (dhf8r)
+    # X-Remote-Sn: Funk
+    # X-Remote-Givenname: Daniel
+    # X-Remote-Uid: dhf8r
+    # Eppn: dhf8r@virginia.edu
+    # Cn: Daniel Harold Funk (dhf8r)
+    # Sn: Funk
+    # Givenname: Daniel
+    # Uid: dhf8r
+    # X-Remote-User: dhf8r@virginia.edu
+    # X-Forwarded-For: 128.143.0.10
+    # X-Forwarded-Host: dev.crconnect.uvadcos.io
+    # X-Forwarded-Server: dev.crconnect.uvadcos.io
+    # Connection: Keep-Alive
+
+    def get_user_info(self):
+        uid = request.headers.get("Uid")
+        cn = request.headers.get("Cn")
+        if not uid:
+            uid = request.headers.get("X-Remote-Uid")
+        if not uid:
+            raise CommError(1100, "invalid_sso_credentials", r"'Uid' nor 'X-Remote-Uid' were present in the headers: %s"% str(request.headers))
+        return User(uid, cn)