paste.cascade – send requests to multiple applications until success

Cascades through several applications, so long as applications return 404 Not Found.

Module Contents

class paste.cascade.Cascade(applications, catch=(404, ))

Passed a list of applications, Cascade will try each of them in turn. If one returns a status code listed in catch (by default just 404 Not Found) then the next application is tried.

If all applications fail, then the last application’s failure response is used.

Instances of this class are WSGI applications.

paste.cascade.make_cascade(loader, global_conf, catch='404', **local_conf)

Entry point for Paste Deploy configuration

Expects configuration like:

[composit:cascade]
use = egg:Paste#cascade
# all start with 'app' and are sorted alphabetically
app1 = foo
app2 = bar
...
catch = 404 500 ...