tornado+WSGI+Apache

1、原理

2、安装mod_wsgi

http://pan.baidu.com/s/1sjsccWH

configure的时候会找对应的python脚本，默认是/usr/bin/python

生成mod_wsgi.so,拷贝到apache的modules下面

3、apache的配置：

LoadModule wsgi_module    modules/mod_wsgi.so  

WSGIScriptAlias /myapp /usr/local/sinasrv2/var/www/wsgi-scripts/myapp.wsgi                                                   

<Directory "/usr/local/sinasrv2/var/www/wsgi-scripts/">
    AllowOverride all
    Options Indexes FollowSymLinks  ExecCGI
    Order allow,deny
    SetHandler wsgi-script
    Allow from all
</Directory>

4、wsgi的脚本：

#!/usr/bin/env python26

import tornado.web
import tornado.wsgi
import wsgiref.simple_server
import wsgiref.handlers

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world,AAAA,WSGI")

def application(environ, start_response):
    if 'SCRIPT_NAME' in environ:
        tornado_app = tornado.wsgi.WSGIApplication([
             (r"/myapp", MainHandler),
        ])
        return tornado_app(environ,start_response)
if __name__ == "__main__":
    tornado_app = tornado.wsgi.WSGIApplication([
        (r"/myapp", MainHandler),
    ])

    server = wsgiref.simple_server.make_server('',, application)
    server.serve_forever()

必须设置application函数，否则会出现下面的错误信息：

[Wed Aug  :: ] [error] [client 10.217.12.113] mod_wsgi (pid=): Exception occurred processing WSGI script '/us
r/local/sinasrv2/var/www/wsgi-scripts/myapp.wsgi'

5、测试

6、遇到的问题

[Wed Aug 13 16:29:57 2014] [error] [client 10.217.87.146] Traceback (most recent call last):
[Wed Aug 13 16:29:57 2014] [error] [client 10.217.87.146]   File "/usr/local/sinasrv2/var/www/wsgi-scripts/myapp.wsgi", line 11, in <module>
[Wed Aug 13 16:29:57 2014] [error] [client 10.217.87.146]     os.chdir(sys.path[0])
[Wed Aug 13 16:29:57 2014] [error] [client 10.217.87.146] OSError: [Errno 20] Not a directory: '/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg'

原因在于调用的时候使用如下代码：

os.chdir(sys.path[0])

sys.path.append("./lib")

apache调用的时候path[0]为

usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg

路径引用的时候使用：

sys.path.append(os.path.dirname(__file__) + os.sep + 'lib')  

[参考文献]

1、http://pith.org/notes/2011/06/13/tornado-in-wsgi-mode-on-dotcloud/