使用 apache 和 mod_wsgi 的 Flask hello world 仅显示 webroot 中的文件

我正在尝试使用 wsgi 从 Flask 站点通过 apache2 运行基本的 hello.py。我的代码如下所示：

/var/www/flask_dev/hello.py

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello World!'

if __name__ == '__main__':
    app.run()

/var/www/flask_dev/start.wsgi

from hello import app as application

import sys
sys.stdout = sys.stderr

/etc/apache2/sites-available/flask_dev.conf

#Listen 80
ServerName example.com

<VirtualHost *:80>
    # The ServerName directive sets the request scheme, hostname and port that
    # the server uses to identify itself. This is used when creating
    # redirection URLs. In the context of virtual hosts, the ServerName
    # specifies what hostname must appear in the request's Host: header to
    # match this virtual host. For the default virtual host (this file) this
    # value is not decisive as it is used as a last resort host regardless.
    # However, you must set it for any further virtual host explicitly.
    #ServerName www.example.com

    ServerAdmin webmaster@localhost
    #ServerName example.com

    WSGIDaemonProcess hello user=<myuser> group=<myusersgroup> threads=5 python-path=/var/www/flask_dev

    WSGIScriptAlias / /var/www/flask_dev/start.wsgi
    <Directory /var/www/flask_dev>
           WSGIProcessGroup hello
           WSGIApplicationGroup %{GLOBAL}
           Order deny,allow
           Allow from all
    </Directory>

    # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
    # error, crit, alert, emerg.
    # It is also possible to configure the loglevel for particular
    # modules, e.g.
    #LogLevel info ssl:warn

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined

    # For most configuration files from conf-available/, which are
    # enabled or disabled at a global level, it is possible to
    # include a line for only one particular virtual host. For example the
    # following line enables the CGI configuration for this host only
    # after it has been globally disabled with "a2disconf".
    #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet

/etc/主机

127.0.0.1    example.com

我跑完之后sudo a2ensite flask_dev and sudo service apache2 reload (or restart)， 即将www.example.com只是给出了 webroot 中的文件。 ~~我检查了错误日志，看起来 mod_wsgi 和 mod_python 正在启动。有谁知道我还缺少什么吗？~~

Edit 1我现在可以从错误日志中看到消息，看起来我受到了影响https://bugs.launchpad.net/ubuntu/+source/libapache2-mod-python/+bug/1073147在 Ubuntu 12.04 上。

我稍后会尝试重新编译到正确的 Python 版本，看看它是否修复了错误。目前，虽然发生此错误，但我在访问 example.com 时仍然会看到列出的文件。

错误日志

[Mon Jan 13 11:28:06 2014] [notice] caught SIGTERM, shutting down
[Mon Jan 13 11:28:07 2014] [error] python_init: Python version mismatch, expected '2.7.2+', found '2.7.3'.
[Mon Jan 13 11:28:07 2014] [error] python_init: Python executable found '/usr/bin/python'.
[Mon Jan 13 11:28:07 2014] [error] python_init: Python path being used '/usr/lib/python2.7/:/usr/lib/python2.7/plat-linux2:/usr/lib/python2.7/lib-tk:/usr/lib/python2.7/lib-old:/usr/lib/python2.7/lib-dynload'.
[Mon Jan 13 11:28:07 2014] [notice] mod_python: Creating 8 session mutexes based on 6 max processes and 25 max threads.
[Mon Jan 13 11:28:07 2014] [notice] mod_python: using mutex_directory /tmp 
[Mon Jan 13 11:28:07 2014] [warn] mod_wsgi: Compiled for Python/2.7.2+.
[Mon Jan 13 11:28:07 2014] [warn] mod_wsgi: Runtime using Python/2.7.3.
[Mon Jan 13 11:28:07 2014] [notice] Apache/2.2.22 (Ubuntu) mod_python/3.3.1 Python/2.7.3 mod_wsgi/3.3 configured -- resuming normal operations

Edit 2更新到13.04已经解决了版本信息。现在，当我访问 example.com 时，我收到 403 禁止错误。当我跟踪 error.log 时，我看到：

[Mon Jan 13 21:03:41.464815 2014] [:error] [pid 10999:tid 3014634304] [client 127.0.0.1:35067] Attempt to invoke directory as WSGI application: /var/www/flask_dev/

我尝试过添加AddHandler cgi-script py到我的flask_dev.conf，但这似乎也不起作用。

有没有人以前在 WSGI 应用程序中遇到过这种错误，并且知道解决方法？

提前致谢。

Edit 3所有源代码现在都可以运行

在 /var/www/flask_dev/hello.wsgi 中，您应该导入应用程序而不是 ass。 其次，您不应该使用 DocumentRoot 来存储脚本。 DocumentRoot 用于存储静态文件，因此它肯定会将它们列为文件，并且永远不会将它们作为脚本运行。

尝试使用

    WSGIScriptAlias / /var/www/flask_dev/hello.wsgi
    <Directory "/var/www/flask_dev">
       WSGIProcessGroup hello
       WSGIApplicationGroup %{GLOBAL}
       Order deny,allow
       Allow from all
    </Directory>

Check this page.