Hi.
I have written this code to write custom "resource handlers" for exceptions.
Using adapters directly avoids the use of the context.
class DefaultExceptionHandler(object):
# TODO catch all error handling
implements(inevow.ICanHandleException)
def renderHTTP_exception(self, ctx, reason):
def cb(html):
request.write(html)
request.finishRequest(False)
log.err(reason)
request = inevow.IRequest(ctx)
error = reason.value
# make error available to the adapter
request.error = error
rend = inevow.IResource(error)
rend.renderHTTP(ctx).addCallback(cb)
# replace the default one
appserver.DefaultExceptionHandler = DefaultExceptionHandler
class ExceptionResource(Adapter, rend.Page):
docFactory = loaders.stan(
t.html[
t.head[
t.title["Oops"]
],
t.body[
t.p(render=t.directive("string"))
]
]
)
class ZeroDivisionResource(Adapter, rend.Page):
implements(inevow.IRenderer)
docFactory = loaders.stan(
t.html[
t.head[
t.title["Oops"]
],
t.body[
t.p[
t.xml("∞")
]
]
]
)
registerAdapter(ExceptionResource, Exception, inevow.IResource)
registerAdapter(ZeroDivisionResource, ZeroDivisionError, inevow.IResource)
Example:
class OopsPage(rend.Page):
def exception(self, ctx, data):
1/0 # cause an exception on purpose
docFactory = loaders.stan(exception)
Regards Manlio Perillo
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