Invalid parsing of Forwarded header fixed

_parse_rfc7239_header() did not parse properly
a Forwarded header with additional spaces

Closes-Bug: #1711573
Change-Id: Ic8b7f9698d7b3440005b17d249b1c8f0f66dae8a
(cherry picked from commit 480d60ac85)

oslo_middleware/http_proxy_to_wsgi.py

@@ -49,7 +49,7 @@ class HTTPProxyToWSGI(base.ConfigurableMiddleware):
             entry = {}
             for d in proxy.split(";"):
                 key, _, value = d.partition("=")
-                entry[key.lower()] = value
+                entry[key.lower().strip()] = value.strip()
             result.append(entry)
         return result
 

oslo_middleware/tests/test_http_proxy_to_wsgi.py

@@ -89,6 +89,18 @@ class TestHTTPProxyToWSGI(test_base.BaseTestCase):
         response = self.request.get_response(self.middleware)
         self.assertEqual(b"https://localhost:80/", response.body)
 
+    def test__parse_rfc7239_header(self):
+        expected_result = [{'for': 'foobar', 'proto': 'https'},
+                           {'for': 'foobaz', 'proto': 'http'}]
+
+        result = self.middleware._parse_rfc7239_header(
+            "for=foobar;proto=https, for=foobaz;proto=http")
+        self.assertEqual(expected_result, result)
+
+        result = self.middleware._parse_rfc7239_header(
+            "for=foobar; proto=https, for=foobaz; proto=http")
+        self.assertEqual(expected_result, result)
+
     def test_rfc7239_proto_host(self):
         self.request.headers['Forwarded'] = (
             "for=foobar;proto=https;host=example.com, for=foobaz;proto=http")