在web.py中的loadhook中重定向

import web

urls = (
    '/redirect', 'RedirectHandler'
)

class RedirectHandler:
    def GET(self):
        web.seeother('/new_url')

def loadhook():
    if web.ctx.path == '/old_url':
        web.ctx.status = '301 Moved Permanently'
        web.ctx.headers['Location'] = '/new_url'

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

if __name__ == '__main__':
    app.run()