statushandlers.coffee 360 Bytes
###
This script will add a custom HTTP status code handler, here for 404 pages.
###

casper = require("casper").create
    httpStatusHandlers:
        404: (self, resource) ->
            @echo "Resource at #{resource.url} not found (404)", "COMMENT"
    verbose: true

casper.start "http://www.google.com/plop", ->
    @echo "Done."
    @exit()

casper.run()