In one of the Albatross apps which Andrew has been working on for us, he has 
arranged things so that exceptions are caught and the user is presented with a nice 
explanatory page telling them something has gone wrong and inviting them to log 
back in (the user's credentials are invalided by the exception handling routine for 
security reasons). A copy of the traceback is emailed to the system administrator. 
We have found this to be very useful.

Even better would be writing details of the app context as well as teh traceback into 
an app exceptions log, along with any other relevent details or clues about what the 
user was doing at the time (maybe the user could be presented with a page inviting 
them to describe what they were doing at the time). Since this information may 
include confidential or security-sensitive details, it should not be emailed, but a tickler 
message might still be emailed to the system admin alerting them that an exception 
has occured.

Andrew: want to put these ideas on the To-Do list for the NetEpi apps?

Tim C

> Andrew McNamara <andrewm@object-craft.com.au> wrote:
> 
>In the testing process, I have determined that certain type of request urls
>will cause Albatross to throw an exception, and I'm trying to catch that
>exception to redirect to a public error page of my choosing so that end
>users do not see the Python tracebacks.

There are several ways to do this. As Neal suggested, you can subclass
the Application class you have chosen, and override the handle_exception
method, or you can add a template page called "traceback.html", which
will be passed the python and albatross template tracebacks (with special
characters suitably escaped) in python_exc and html_exc respectively.

I would also recommend looking at the Albatross code - specifically the
Application class in app.py.

-- 
Andrew McNamara, Senior Developer, Object Craft
http://www.object-craft.com.au/
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