convert header values to strings

sanic/response.py

@@ -1,5 +1,5 @@
 from aiofiles import open as open_async
-from .cookies import CookieJar
+from .cookies import CookieJar, Cookie
 from mimetypes import guess_type
 from os import path
 from ujson import dumps as json_dumps
@@ -97,6 +97,8 @@ class HTTPResponse:
         headers = b''
         if self.headers:
             headers = b''.join(
+                b'%b: %b\r\n' % (name.encode(), str(value).encode('utf-8'))
+                if type(value) != Cookie else
                 b'%b: %b\r\n' % (name.encode(), value.encode('utf-8'))
                 for name, value in self.headers.items()
             )

tests/test_requests.py

@@ -32,6 +32,32 @@ def test_text():
     assert response.text == 'Hello'
 
 
+def test_headers():
+    app = Sanic('test_text')
+
+    @app.route('/')
+    async def handler(request):
+        headers = {"spam": "great"}
+        return text('Hello', headers=headers)
+
+    request, response = sanic_endpoint_test(app)
+
+    assert response.headers.get('spam') == 'great'
+
+
+def test_invalid_headers():
+    app = Sanic('test_text')
+
+    @app.route('/')
+    async def handler(request):
+        headers = {"answer": 42}
+        return text('Hello', headers=headers)
+
+    request, response = sanic_endpoint_test(app)
+
+    assert response.headers.get('answer') == '42'
+
+
 def test_json():
     app = Sanic('test_json')