python WSGI+Paste Deployment+oslo.config综合运用
关于Paste Deployment介绍请看我之前的博客Python Paste Deployment
关于oslo.config介绍请看我之前博客oslo.config
关于WSGI介绍请看我之前博客WSGI接口
在有了上面的基础后,不多说,直接上代码
server.py
import os
import commands
from paste.deploy import loadapp
from oslo_config import cfg
from wsgiref.simple_server import make_server
server_opts = [
cfg.StrOpt('bind_host',
default='0.0.0.0',
help='IP address to listen on.'),
cfg.IntOpt('bind_port',
default=9292,
help='Port number to listen on.')
]
CONF = cfg.CONF
CONF.register_opts(server_opts)
CONF(default_config_files=['server-config.conf'])
class Show(object):
"""docstring for Show"""
def __init__(self):
super(Show, self).__init__()
def __call__(self, environ, start_response):
start_response("200 OK", [("Content-type", "text/plain")])
return ["welcome to use it!"]
@classmethod
def factory(cls, global_conf, **kwargs):
print "in Show.factory", global_conf, kwargs
return Show()
class Hello(object):
"""docstring for Hello"""
def __init__(self):
super(Hello, self).__init__()
def __call__(self, environ, start_response):
start_response("200 OK", [("Content-type", "text/plain")])
return ["Hello, nice to meet you"]
@classmethod
def factory(cls, global_conf, **kwargs):
print "in Hello.factory", global_conf, kwargs
return Hello()
class Goodbye(object):
"""docstring for Goodbye"""
def __init__(self):
super(Goodbye, self).__init__()
def __call__(self, environ, start_response):
start_response("200 OK", [("Content-type", "text/plain")])
return ["Goodbye, may we meet again"]
@classmethod
def factory(cls, global_conf, **kwargs):
print "in Goodbye.factory", global_conf, kwargs
return Goodbye()
class Free(object):
"""docstring for Free"""
def __init__(self):
super(Free, self).__init__()
def __call__(self, environ, start_response):
start_response("200 OK", [("Content-type", "text/plain")])
result = commands.getstatusoutput('free')
return [str(result[1])]
@classmethod
def factory(cls, global_conf, **kwargs):
print "in Free.factory", global_conf, kwargs
return Free()
def main():
configfile = "server-api.ini"
appname = "myServer"
wsgi_app = loadapp("config:%s" % os.path.abspath(configfile), appname)
print CONF.bind_host, CONF.bind_port
server = make_server(CONF.bind_host, CONF.bind_port, wsgi_app)
server.serve_forever()
if __name__ == '__main__':
main()
server-api.ini
[composite:myServer] use=egg:Paste#urlmap /:show /hello:say_hello /goodbye:say_goodbye /free:exe_free [app:say_hello] description = This is to say hello paste.app_factory = server:Hello.factory [app:say_goodbye] description = This is to say goodbye paste.app_factory = server:Goodbye.factory [app:show] description = This is to show version paste.app_factory = server:Show.factory [app:exe_free] description = This is to execute free paste.app_factory = server:Free.factoryserver-config.ini
[DEFAULT] bind_host = bind_port = 8000先启动WSGI服务,然后在浏览器中输入:
过程很简单,利用WSGI处理相应的请求,利用Paste Deploy把请求分发到不同的应用,利用oslo.config读取server配置.