flask 登录: TypeError: decoding Unicode is not supported

Question

我正在将flask，pymongo和flask-login作为堆栈运行。

我的flask应用程序在本地运行良好，但是一旦在nginx上使用uwsgi部署了它，就会从flask_login扩展中收到一个奇怪的unicode错误。

简而言之:

TypeError: decoding Unicode is not supported

追溯:

[pid: 21753|app: 0|req: 5/5] 84.207.253.34 () {38 vars in 600 bytes} [Thu Jun 13 16:51:08 2013] GET / => generated 0 bytes in 4 msecs (HTTP/1.1 500) 0 headers in 0 bytes (0 switches on core 0)
Traceback (most recent call last):
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1473, in full_dispatch_request
    rv = self.preprocess_request()
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask/app.py", line 1666, in preprocess_request
    rv = func()
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask_login.py", line 311, in _load_user
    deleted = self._session_protection()
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask_login.py", line 325, in _session_protection
    ident = _create_identifier()
  File "/myproject/myproject-env/local/lib/python2.7/site-packages/flask_login.py", line 133, in _create_identifier
    request.headers.get("User-Agent")), 'utf8', errors='replace')
TypeError: decoding Unicode is not supported

为什么在开发环境中不会发生这种情况？因此，它一定与nginx上的uwsgi有关。有什么建议么？非常感谢

Answer 1

仅通过降低flask的级别就无法解决该问题，因为即使安装flask==0.9也会安装最新的依赖项，这是不好的werkzeug==0.9因此，最好按此顺序安装以下内容:

pip install werkzeug==0.8.3
pip install flask==0.9
pip install Flask-Login==0.1.3

flask登录，然后可以是最新版本0.1.3。那里没有伤害。
这个堆栈对我有用。

希望这会有所帮助，直到紧急补丁发布。