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Custom NotFound message

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Problem

How to customize notfound and other messages?

Solution

import web

urls = (...)
app =  web.application(urls, globals())

def notfound():
    return web.notfound("Sorry, the page you were looking for was not found.")

    # You can use template result like below, either is ok:
    #return web.notfound(render.notfound())
    #return web.notfound(str(render.notfound()))

app.notfound = notfound

And to return the custom 404 from your code, just do:

class example:
    def GET(self):
        raise web.notfound()

In the same way InternalError message can also be customized.

def internalerror():
    return web.internalerror("Bad, bad server. No donut for you.")

app.internalerror = internalerror