python webservice hello world

最近在搞基于python的webservice项目,今天为把环境给配好,折腾了不少时间,还是把配的过程记录下来,以后备用:

首先你系统上要有python,这个不必说啦,我系统上用的是2.7+

其次,要用python进行webservice开发,还需要一些库:

    lxml :

        命令行下 sudo easy_install lxml 就能安装

    pytz :

        命令行下 sudo easy_install pytz 就能安装

    soaplib:

        进行webservice开发必须要用的库,可以在https://github.com/volador/soaplib拿到,注意要先安装上面两个插件再安装这个,因为这个依赖于上面两个插件,把zip拿下来后解压,sudo python setup.py install 就能安装了。

Soaplib is an easy to use python library for publishing soap web services using WSDL 1.1 standard, and answering SOAP 1.1 requests. With a very small amount of code, soaplib allows you to write a useful web service and deploy it as a WSGI application.
完成上面步骤后就能进行webservice发布了,看下helloworld:

直接贴代码:server.py

import soaplib
from soaplib.core.util.wsgi_wrapper import run_twisted #发布服务
from soaplib.core.server import wsgi
from soaplib.core.service import DefinitionBase  #所有服务类必须继承该类
from soaplib.core.service import soap  #声明注解
from soaplib.core.model.clazz import Array #声明要使用的类型
from soaplib.core.model.clazz import ClassModel  #若服务返回类,该返回类必须是该类的子类
from soaplib.core.model.primitive import Integer,String 
class C_ProbeCdrModel(ClassModel):
	__namespace__ = "C_ProbeCdrModel"
	Name=String
	Id=Integer
class HelloWorldService(DefinitionBase):  #this is a web service
	@soap(String,_returns=String)    #声明一个服务,标识方法的参数以及返回值
	def say_hello(self,name):
		return 'hello %s!'%name
	@soap(_returns=Array(String))
	def GetCdrArray(self):
		L_Result=["1","2","3"]
		return L_Result
	@soap(_returns=C_ProbeCdrModel)
	def GetCdr(self):     #返回的是一个类,该类必须是ClassModel的子类,该类已经在上面定义
		L_Model=C_ProbeCdrModel()
		L_Model.Name=L_Model.Name
		L_Model.Id=L_Model.Id
		return L_Model 
if __name__=='_main__':
	soap_app=soaplib.core.Application([HelloWorldService], 'tns')
	wsgi_app=wsgi.Application(soap_app)
	print 'listening on 127.0.0.1:7789'
	print 'wsdl is at: http://127.0.0.1:7789/SOAP/?wsdl'
	run_twisted( ( (wsgi_app, "SOAP"),), 7789)
if __name__=='__main__':  #发布服务
	try:
		from wsgiref.simple_server import make_server
		soap_application = soaplib.core.Application([HelloWorldService], 'tns')
		wsgi_application = wsgi.Application(soap_application)
		server = make_server('localhost', 7789, wsgi_application)
		server.serve_forever()
	except ImportError:
		print 'error'


python server.py可以直接运行服务了。运行服务后打开浏览器,地址栏上键入: http://localhost:7789/SOAP/?wsdl就能看到描述服务的xml文档了。

请求服务:

需要用到suds库:

    具体可以在https://fedorahosted.org/suds/下载。安装跟上面一样。

python交互模式下键入:

from suds.client import Client

test=Client('http://localhost:7789/SOAP/?wsdl')

print test.service.say_hello('volador')

这样就调用了say_hello这个服务了。

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