[albatross-users] Help catching an exception...

[Neal Stephenson]

HI,

	Not sure if this is right, but I override handle_exception in a
subclass of the Application that I use for all my apps.

		Neal


On Wed, 2004-09-29 at 14:12, Sheila King wrote:
> Hello,
> 
> I'm using Albatross to develop an account management interface for the web
> hosting company that I work for.
> 
> 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.
> 
> Mind you, it would be some odd circumstance that would even lead to this
> type of error, but I am hoping to cover as many error situations as I can.
> 
> The problem is this:
> 
> A correct URL for the application might look like this:
> 
> http://example.net/cgi-dev/mgr.py/createlogin
> 
> But suppose this URL is requested instead:
> http://example.net/cgi-dev/mgr.py/mgr.py/createlogin
> 
> Then albatross gives the following traceback:
> -----
> Template traceback (most recent call last):
> 
> Traceback (most recent call last):
>   File "albatross/app.py", line 279, in run
>     self.load_page(ctx)
>   File "albatross/randompage.py", line 29, in load_page
>     self.load_page_module(ctx, page)
>   File "albatross/app.py", line 435, in load_page_module
>     raise ApplicationError('%s (in %s)' % (e, mod_dir))
> ApplicationError: No module named createlogin (in ./pages/mgr/py)
> -----
> 
> 
> In the __main__ function of the mgr.py file I tried adding 
> a try/except to wrap the whole invocation of an albatross app
> (I know...bad programming...but...well...)
> 
> Here is the except block I put on:
> 
>     except ApplicationError, e:
>         Request = "http://www.Example.net/cgi-bin/mgr.py/errorpage"
>         app = qaApp()
>         ctx = qaAppContext(app)
>         ctx.locals._errmssg = e
>         app.run(qaRequest(Request))
>         
> Unfortunately, it appears to be having no effect, and I am still
> getting the identical traceback as before.
> 
> I also tried changing the "except" statement to
> 
> except albatross.ApplicationError, e
> 
> and also tried adding an import statement at the top of the code
> 
> from albatross.common import AlbatrossError
> 
> and changing the except statement to:
> 
> except AlbatrossError, e
> 
> But again, no change in the traceback produced for that particular URL.
> 
> 
> I sure would appreciate any tips on how to catch this error and
> redirect to an error page of my choosing...
> 
> Thank you,
> 
> 
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> Albatross-users at object-craft.com.au
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-- 
Neal Stephenson <neal at yorku.ca>         Phone:  (416) 736-2100 x40211
Manager, Development Services           Fax:    (416) 736-5830
Communication and Network Services      Steacie T103, 4700 Keele St.
York University                         Toronto, On., Canada M3J 1P3