BugFix: Asgi Path Param Encoding change to utf-8 (#208)

* fix: third party web app, changing request path encoding to utf-8

* fix

* style fix

* ignore

* fix

* add tests

* fix

* Update tests/test_http_wsgi.py

Co-authored-by: Fredrik Erlandsson <fredrik.e@gmail.com>

* Update tests/test_http_wsgi.py

Co-authored-by: Fredrik Erlandsson <fredrik.e@gmail.com>

* Update test_http_wsgi.py

---------

Co-authored-by: Fredrik Erlandsson <fredrik.e@gmail.com>

azure/functions/_http_wsgi.py

@@ -29,8 +29,11 @@ class WsgiRequest:
         # Implement interfaces for PEP 3333 environ
         self.request_method = getattr(func_req, 'method', None)
         self.script_name = ''
-        self.path_info = unquote_to_bytes(
-            getattr(url, 'path', None)).decode('latin-1')  # type: ignore
+        self.path_info = (
+            unquote_to_bytes(getattr(url, 'path', None))  # type: ignore
+            .decode('latin-1' if type(self) is WsgiRequest else 'utf-8')
+        )
+
         self.query_string = getattr(url, 'query', None)
         self.content_type = self._lowercased_headers.get('content-type')
         self.content_length = str(len(func_req_body))

tests/test_http_wsgi.py

@@ -14,6 +14,7 @@ from azure.functions._http_wsgi import (
     WsgiResponse,
     WsgiMiddleware
 )
+from azure.functions._http_asgi import AsgiRequest
 
 
 class WsgiException(Exception):
@@ -211,6 +212,18 @@ class TestHttpWsgi(unittest.TestCase):
         self.assertEqual(func_response.status_code, 200)
         self.assertEqual(func_response.get_body(), b'sample string')
 
+    def test_path_encoding_utf8(self):
+        url = 'http://example.com/Pippi%20L%C3%A5ngstrump'
+        request = AsgiRequest(self._generate_func_request(url=url))
+
+        self.assertEqual(request.path_info, u'/Pippi L\u00e5ngstrump')
+
+    def test_path_encoding_latin1(self):
+        url = 'http://example.com/Pippi%20L%C3%A5ngstrump'
+        request = WsgiRequest(self._generate_func_request(url=url))
+
+        self.assertEqual(request.path_info, u'/Pippi L\u00c3\u00a5ngstrump')
+
     def _generate_func_request(
             self,
             method="POST",