raise HTTP(...,cookies=request.cookies)

gluon/http.py

@@ -63,11 +63,18 @@ class HTTP(BaseException):
         self,
         status,
         body='',
+        cookies=None,
         **headers
         ):
         self.status = status
         self.body = body
         self.headers = headers
+        self.cookies2headers(cookies)
+
+    def cookies2headers(self,cookies):
+        if cookies and len(cookies)>0:
+            self.headers['Set-Cookie'] = [
+                str(cookie)[11:] for cookie in cookies.values()]
 
     def to(self, responder):
         if self.status in defined_status:

gluon/main.py

@@ -562,9 +562,8 @@ def wsgibase(environ, responder):
                     del response.cookies[response.session_id_name]
                 elif session._secure:
                     response.cookies[response.session_id_name]['secure'] = True
-                if len(response.cookies)>0:
-                    http_response.headers['Set-Cookie'] = \
-                        [str(cookie)[11:] for cookie in response.cookies.values()]
+                
+                http_response.cookies2headers(response.cookies)
                 ticket=None
 
             except RestrictedError, e: