From f7d161fcb6f111d0dc36b8d6252c0d7061bbc5ae Mon Sep 17 00:00:00 2001
From: Lars Wirzenius <liw@liw.fi>
Date: Sun, 16 Apr 2017 10:20:52 +0300
Subject: Start on functions to check authentication

---
 distixapi/__init__.py    |  1 +
 distixapi/authn.py       | 18 ++++++++++++++++++
 distixapi/authn_tests.py | 11 +++++++++++
 3 files changed, 30 insertions(+)
 create mode 100644 distixapi/authn.py
 create mode 100644 distixapi/authn_tests.py

diff --git a/distixapi/__init__.py b/distixapi/__init__.py
index 03a5053..d860521 100644
--- a/distixapi/__init__.py
+++ b/distixapi/__init__.py
@@ -1 +1,2 @@
 from .version import __version__, __version_info__
+from .authn import AuthenticationError, get_credentials
diff --git a/distixapi/authn.py b/distixapi/authn.py
new file mode 100644
index 0000000..53816b6
--- /dev/null
+++ b/distixapi/authn.py
@@ -0,0 +1,18 @@
+# Functions for checking authantication for API clients.
+
+
+def get_credentials(request):
+    '''Return username, password of API client.
+
+    They're assumed to be conveyed in an Authorization header using
+    Basic Auth.
+
+    '''
+
+    raise AuthenticationError('No Authorization header')
+
+
+
+class AuthenticationError(Exception):
+
+    pass
diff --git a/distixapi/authn_tests.py b/distixapi/authn_tests.py
new file mode 100644
index 0000000..2a220ab
--- /dev/null
+++ b/distixapi/authn_tests.py
@@ -0,0 +1,11 @@
+import unittest
+
+import distixapi
+
+
+class GetCredentialsTests(unittest.TestCase):
+
+    def test_raises_error_if_no_Authentication_header(self):
+        request = {}
+        with self.assertRaises(distixapi.AuthenticationError):
+            distixapi.get_credentials(request)
-- 
cgit v1.2.1