Display exception message in error document

[Pavel Paulau]

Fragment of my middleware.py:

if asbool(config["debug"]):

    app = StatusCodeRedirect(app)

else:

    app = StatusCodeRedirect(app, [400, 403, 404, 405, 500, 503])

Error document controller:

original_response = request.environ.get("pylons.original_response")

c.message = literal(original_response.status)

return render("/error.html")

How to display exception message instead of original response (like "500 Internal Server Error")?