使用Redis跟踪烧瓶中的在线用户

Question

我正在尝试用烧瓶用户重新使用Redis，以跟踪我在线的所有用户。我使用redis而不是全局词典的原因是，我可以为会话设置超时。

否则，如果登录超过10分钟，我将不得不定期删除用户。

我在此处遵循代码，将redis包括在我的烧瓶项目中http://flask.pocoo.org/snippets/71/我将redis对象放在视图中，并在视图中包括了助手功能。但是，当我在get_online_users（）

中调用P.Sunion（...）函数时，我会得到此堆栈跟踪

return self.wsgi_app(environ, start_response)
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site-             
packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site-  
packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site- 
packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site- 
packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site- 
packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site- 
packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site
packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/sahilshah/Documents/2015 Spring Classes/CIS  
350/studybuddy/sahil/app/views.py", line 23, in signin
online_users = get_online_users()
File "/Users/sahilshah/Documents/2015 Spring Classes/CIS  
350/studybuddy/sahil/app/views.py", line 102, in get_online_users
for x in minutes])
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site- 
packages/redis/client.py", line 1543, in sunion
return self.execute_command('SUNION', *args)
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site-   
packages/redis/client.py", line 570, in execute_command
connection.send_command(*args)
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site- 
packages/redis/connection.py", line 556, in send_command
self.send_packed_command(self.pack_command(*args))
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site-  
packages/redis/connection.py", line 532, in send_packed_command
self.connect()
File "/Users/sahilshah/.virtualenvs/venv/lib/python2.7/site
packages/redis/connection.py", line 436, in connect
raise ConnectionError(self._error_message(e))
ConnectionError: Error 61 connecting to localhost:6379. Connection refused.

Answer 1

确保已安装了redis，它没有内置的任何分布。REDIS团队建议通过下载安装稳定版本（即通过Linux Distribution Repo）。这是我所做的：

   wget http://download.redis.io/redis-stable.tar.gz
   tar xvzf redis-stable.tar.gz
   cd redis-stable
   make hiredis jemalloc linenoise lua

确保通过发出redis-cli命令来运行服务器，您应该看到一个提示符（默认提示为" 127.0.0.0.1:6379>"）。如果您有任何问题要到达该提示，请在So中发布有关该问题的具体问题。