无法获取Flask应用程序中设置的环境变量 [英] cannot get environment variables set in Flask application

问题描述

我试图在CentOS中将敏感信息设置为环境变量，并将其传递给主文件中使用的Flask配置文件，即 init .py.但这没有用.Flask应用程序正在Apache下运行.

I tried to set up sensitive information as environment variables in CentOS, and pass them to Flask config file used in main file, i.e. init.py . But it did not work. The Flask application is running under Apache.

我首先以root用户身份编辑/etc/environment

I first edit /etc/environment as root user

MAIL_USERNAME="[e-mail]"

然后注销，再次登录然后通过运行

then logout, login again Then verify MAIL_USERNAME is set by running

echo $MAIL_USERNAME

这很好

在configuration.py中，这就是我设置MAIL_USERNAME的方式.

And in configuration.py, this is how I set MAIL_USERNAME.

MAIL_USERNAME = os.environ.get('MAIL_USERNAME')

出于测试目的，我打印了MAIL_USERNAME

for testing purpose, I print out MAIL_USERNAME

in __init__.py
print(MAIL_USERNAME)

然后从终端运行(如果我运行

Then from terminal, if I run

python3.4 __init__.py

它打印出MAIL_USERNAME的正确值

it print out correct values of MAIL_USERNAME

但是，如果我在网络浏览器上进行了测试，则未设置MAIL_USERNAME.它显示NONE.我通过查看Apache日志来验证这一点.

However, if I tested on web browser, MAIL_USERNAME is just not set. it shows NONE. I verify this by looking Apache log.

任何对此工作原理的想法都会受到赞赏.

Any idea of how this works would be really appreciated.

谢谢

推荐答案

使用CLI，根据需要设置环境变量.在Linux和macOS上，这是通过 export KEY = value 来完成的.

With your CLI, set the environment variable as you want. On Linux and macOS, this is done with export KEY=value.

之后，环境变量 KEY 将通过 os.environ.get('KEY')用于Python脚本或Flask应用，如下所示:

After that, the environment variable KEY will be available for your Python script or Flask app via os.environ.get('KEY'), like this:

import os
print os.environ.get('key')

>>> value

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