deferred_resource.py 文件源码

def render(self, request):
        def finish(x):
            if request.channel is None: # disconnected
                return
            if x is not None:
                request.write(x)
            request.finish()

        def finish_error(fail):
            if request.channel is None: # disconnected
                return
            request.setResponseCode(500) # won't do anything if already written to
            request.write('---ERROR---')
            request.finish()
            log.err(fail, "Error in DeferredResource handler:")

        defer.maybeDeferred(resource.Resource.render, self, request).addCallbacks(finish, finish_error)
        return server.NOT_DONE_YET