Flask会话不会持续 [英] Flask session not persisting

问题描述

使用Python 2.7，CentOS 6.3上的Apache + mod_wsgi运行

当我在本地主机上时，情况正常。但是，当我在Azure的虚拟机上运行代码时，我没有看到会话信息在页面中持续存在。

基本上，在我看来，我有这样的：

$ b $

  @ frontend.route（'/'）
 def index（）：
 session ['foo '] ='bar'
 print session ['foo'] 
 
 return redirect（url_for（frontend.page2））
 
 @frontend.route 'page2'）
 def page2（）：
打印会话
  

输出是：

  bar 
< SecureCookieSession {}> 
  

我的wsgi配置为apache：

  WSGISocketPrefix / var / run / wsgi 
 
< VirtualHost *：80> 
 ServerName example.com 
 ServerAlias example.com 
 
 WSGIDaemonProcess myproj threads = 5 processes = 5 
 WSGIScriptAlias / /home/mydir/myproj/apache/myproj.wsgi 
 
< Directory / home / mydir / myproj> 
 WSGIScriptReloading on 
 WSGIProcessGroup myproj 
 WSGIApplicationGroup％{GLOBAL} 
排序拒绝，允许
允许所有
< / Directory> 
< / VirtualHost> 
  

我设置了secret_key：

  app.secret_key = os.urandom（24）
  

尝试了两个设置SERVER_NAME，但它没有帮助：

  app.config ['SERVER_NAME'] ='example.com' 
  

有关如何进行调试的更多信息？

谢谢！

解决方案

不要使用 app.secret_key = os.urandom（24 ）！

你应该在这里输入一个静态值，而不是从 os.urandom 每次。您可能误解了文档中的示例，它会告诉您如何从 os.urandom ，但也明确指出：

将它粘贴到你的代码中，你就完成了。


如果你在运行时读取它，那么你的每个工作进程将会有一个不同的密钥！这意味着如果一个请求是由不同的工作人员处理的，会话将会中断，因为Cookie使用错误的密钥进行签名。

Am running with Python 2.7, Apache + mod_wsgi on CentOS 6.3

Things work fine when I am on localhost. However, when I run the code on a vm in Azure, I do not see the session information being persisted across pages.

Basically in my views, I have something like:

@frontend.route('/')
def index():
   session['foo'] = 'bar'
   print session['foo']

   return redirect(url_for("frontend.page2"))

@frontend.route('page2')
def page2():
   print session

The print output is:

bar
<SecureCookieSession {}>

My wsgi configuration for apache is:

WSGISocketPrefix /var/run/wsgi

<VirtualHost *:80>
    ServerName example.com
    ServerAlias example.com

    WSGIDaemonProcess myproj threads=5 processes=5
    WSGIScriptAlias / /home/mydir/myproj/apache/myproj.wsgi

    <Directory /home/mydir/myproj>
        WSGIScriptReloading On
        WSGIProcessGroup myproj
        WSGIApplicationGroup %{GLOBAL}
        Order deny,allow
        Allow from all
    </Directory>
</VirtualHost>

I have the secret_key set:

app.secret_key = os.urandom(24)

I have tried with both setting SERVER_NAME but it doesn't help:

app.config['SERVER_NAME'] = 'example.com' 

Any ideas on how I can debug this more?

Thanks!

解决方案

Don't use app.secret_key = os.urandom(24)!

You're supposed to enter a static value here, not read from os.urandom each time. You've probably misunderstood the example in the docs, it shows you how you can read random data from os.urandom, but it also clearly states:

Just take that thing and copy/paste it into your code and you’re done

If you read it at runtime, then each of your worker processes will have a different secret key! That means if a request is handled by a different worker, the session will break because the cookie is signed with the wrong secret key.

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