tornado中捕获异常并传给client

tornado_exception.py

#!/bin/env python


import tornado.ioloop
import tornado.web
import tornado.httpserver


def _Exception(func):
    def _decorator(*args, **kwargs):
        self = args[0]
        try:
            func(*args, **kwargs)
        except Exception, e:
            self.write("%s" % e)
    return _decorator


class MainHandler(tornado.web.RequestHandler):
     @_Exception
     def get(self):
         raise Exception("Exception: This is a test")


if __name__ == "__main__":
    application = tornado.web.Application([
        (r"/", MainHandler),
    ])
    application.listen(8888)
    tornado.ioloop.IOLoop.instance().start()