redirect(...) now works on ajax responses, thanks Anthony

gluon/http.py

@@ -119,13 +119,18 @@ class HTTP(BaseException):
         return self.message
 
 
-def redirect(location, how=303):
+def redirect(location, how=303, type=None):
+    from gluon import current
+    type = type or ('client' if current.request.ajax else 'http')
     if not location:
         return
     location = location.replace('\r', '%0D').replace('\n', '%0A')
-    raise HTTP(how,
-               'You are being redirected <a href="%s">here</a>' % location,
-               Location=location)
+    if type == 'client':
+        raise HTTP(200, **{'web2py-redirect-location': location})
+    else:
+        raise HTTP(how,
+                   'You are being redirected <a href="%s">here</a>' % location,
+                   Location=location)