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我最近尝试遵循龙卷风 cookie 和安全 cookie 概述并给出示例。

当我的服务器尝试执行 set_secure_cookie(..) 时出现一个奇怪的错误：

File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/escape.py", line 168, in utf8
assert isinstance(value, unicode)
AssertionError

我做错了什么？

我的龙卷风服务器：

import tornado.auth
import tornado.escape
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
import Settings

from tornado.options import define, options

define("port", default=8888, help="run on the given port", type=int)

class BaseHandler(tornado.web.RequestHandler):
    def get_current_user(self):
        return self.get_secure_cookie("user")

class MainHandler(BaseHandler):
    @tornado.web.authenticated
    def get(self):
        name = tornado.escape.xhtml_escape(self.current_user)
        self.write("Hello, " + name)

class LoginHandler(BaseHandler):
    def get(self):
        self.write('<html><body><form action="/login" method="post">'
                   'Name: <input type="text" name="name">'
                   '<input type="submit" value="Sign in">'
                   '</form></body></html>')

    def post(self):
        self.set_secure_cookie("user", self.get_argument("name"))
        self.redirect("/")

class Application(tornado.web.Application):
    def __init__(self):
        handlers = [
            (r"/", MainHandler),
            (r"/login", LoginHandler),
        ]
        settings = {
            "template_path":Settings.TEMPLATE_PATH,
            "static_path":Settings.STATIC_PATH,
            "debug":Settings.DEBUG,
            "cookie_secret": Settings.COOKIE_SECRET,
            "login_url": "/login"
        }
        tornado.web.Application.__init__(self, handlers, **settings)

def main():
    tornado.options.parse_command_line()
    http_server = tornado.httpserver.HTTPServer(Application())
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()

if __name__ == "__main__":
    main()

完整追溯：

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/web.py", line 1042, in _execute
    getattr(self, self.request.method.lower())(*args, **kwargs)
  File "/home/gvincent/Dropbox/workspace/scubabook/WebServer.py", line 31, in post
    self.set_secure_cookie("user", self.get_argument("name"))
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/web.py", line 426, in set_secure_cookie
    self.set_cookie(name, self.create_signed_value(name, value),
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/web.py", line 438, in create_signed_value
    name, value)
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/web.py", line 2029, in create_signed_value
    signature = _create_signature(secret, name, value, timestamp)
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/web.py", line 2066, in _create_signature
    hash = hmac.new(utf8(secret), digestmod=hashlib.sha1)
  File "/usr/local/lib/python2.7/dist-packages/tornado-2.4.1-py2.7.egg/tornado/escape.py", line 168, in utf8
    assert isinstance(value, unicode)
AssertionError
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1 回答 1

3

你的Settings.COOKIE_SECRET值必须是一个unicode或str对象。

只有在不是这种情况下才会提出您看到的断言。您需要三次检查您的Settings.COOKIE_SECRET值是否不是列表、元组、字节数组或任何其他不是stror的类型unicode。

于 2013-02-12T12:22:50.113 回答