Tornado 静态文件禁用缓存

在开发环境里,静态文件需要经常改动,特别是css,可以用下面方式禁用缓存。

import tornado.web

class NoCacheStaticFileHandler(tornado.web.StaticFileHandler):
    def set_extra_headers(self, path):
        self.set_header("Cache-control", "no-cache")

class Application(tornado.web.Application):
    def __init__(self):
        handlers = [
          # ...
          url(r"/static/(.*)", 
          tornado.web.StaticFileHandler if not options.debug else NoCacheStaticFileHandler, {
                "path": '/var/www/static' 
            }, name="static")

下面是我实际中使用的:

handlers = [
            # (r'/static/(.*)', tornado.web.StaticFileHandler, {'path': settings['static_path']})
            (r'/static/(.*)', NoCacheStaticFileHandler, {'path': settings['static_path']})
        ]

其实最简单的方式:

settings = dict(
            static_path=os.path.join(os.path.dirname(__file__), "static"),
            xsrf_cookies=True,
            cookie_secret=setting.COOKIE_SECRET,
            autoescape=None,
            login_url='/oauth/sign-in',
            debug=True,  # here
        )
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