使用 apache 和 mod_wsgi 的 Flask hello world 仅显示 webroot 中的文件 [英] Flask hello world using apache and mod_wsgi shows files in webroot only

问题描述

我正在尝试使用 wsgi 在 apache2 上从烧瓶站点运行基本的 hello.py.这是我的代码的样子:

I'm attempting to run the basic hello.py from the flask site over apache2 using wsgi. Here is what my code looks like:

/var/www/flask_dev/hello.py

/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

/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

/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/hosts

127.0.0.1    example.com

在我运行 sudo a2ensite flask_dev 和 sudo service apache2 reload (or restart) 后，转到 www.example.com 只会给出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?~~

After I run sudo a2ensite flask_dev and sudo service apache2 reload (or restart), going to www.example.com just gives the files in the webroot. ~~I've checked the error log and it looks like mod_wsgi and mod_python are starting up. Does anyone know what else I'm missing?~~

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

Edit 1 I'm now able to see messages from the error log, and it looks like I am affected by https://bugs.launchpad.net/ubuntu/+source/libapache2-mod-python/+bug/1073147 on Ubuntu 12.04.

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 时仍会看到列出的文件.

I will try recompiling later to the correct Python version to see if it fixes the error. For now, while this error occurs, I'm still seeing the files listed when I visit example.com.

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，出现 403 禁止错误.当我跟踪 error.log 时，我看到:

Edit 2 Updating to 13.04 has solved the version info. Now when I go to example.com I get a 403 forbidden error. When I tail the error.log I see:

[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/

我已经尝试将 AddHandler cgi-script py 添加到我的flask_dev.conf 中，但这似乎也不起作用.

I've tried adding AddHandler cgi-script py to my flask_dev.conf, but that doesn't seem to work either.

有没有人在使用 WSGI 应用程序之前遇到过这种错误并且知道解决方法?

Has anyone gotten this kind of error with a WSGI application before and know of a workaround for this?

提前致谢.

编辑 3所有源代码现在都可以使用

Edit 3 All source code works now

推荐答案

在/var/www/flask_dev/hello.wsgi 中，您应该导入 app 而不是 ass.其次，您不应该使用 DocumentRoot 来存储您的脚本.DocumentRoot 用于存储静态文件，因此它肯定会将它们列为文件，而不会将它们作为脚本运行.

in /var/www/flask_dev/hello.wsgi you should be importing app not ass. Second you should not be using DocumentRoot to store your scripts. DocumentRoot is for storing static files and so it will certainly list them as files and never run them as script.

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>

检查这个页面.

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