IronPython 承载和消费WCF服务

是开始学习IronPython 的时候了文章里谈到了“IronPython 2.6提供了新特性clrtype，允许程序员用纯IronPython代码提供property、attribute等CLR类型信息。这样IronPython代码就可以无缝地与Sliverlight、WCF等框架集成。”我们就用clrtype来看看怎么承载WCF服务和消费WCF服务。WCF的契约需要定义接口，这是目前IronPython 尚未支持的功能，所以我们先用C#定义个一个WCF的契约：

using System;
using System.Collections.Generic;
using System.ServiceModel;

namespace TestServiceInterface
{
    /// <summary>
    /// Description of MyClass.
    /// </summary>
    [ServiceContract]
    public interface ImyService
    {
        [OperationContract]
         string GetData(int value);

}

编译成一个程序集TestServiceInterface.dll, 然后在IronPython中实现WCF服务myWcfService.myService，代码如下：

import clr
import clrtype
clr.AddReference('System.ServiceModel')
clr.AddReference('TestServiceInterface')
from TestServiceInterface import ImyService

from System import Console, Uri
from System.ServiceModel import (ServiceHost, BasicHttpBinding, ServiceBehaviorAttribute, InstanceContextMode)

ServiceBehavior = clrtype.attribute(ServiceBehaviorAttribute)

class myService(ImyService):

__metaclass__ = clrtype.ClrClass

_clrnamespace = "myWcfService"

_clrclassattribs = [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single)]

def GetData(self, value):

return r"IronPython WCF服务: 你的输入内容是: %s" % value

sh = ServiceHost(myService() ,Uri("http://localhost:7000/myWcfService%22 ) )

sh.AddServiceEndpoint(

clr.GetClrType(ImyService),

BasicHttpBinding(),
"")

sh.Open()

Console.WriteLine("Press <ENTER> to terminate\n")
Console.ReadLine()

sh.Close()

这里用到了一个clrtype模块, 代码参加IronPython的Sample工程，可以从这里下载：http://ironpython.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=12482 ，第一个例子就是ClrType ，从这里拷贝出来放到我们的py目录下。类myService 必须加一个attribute InstanceContextMode.Single ServiceBehavior 。

我们再来写个测试的客户端代码：

import clr

clr.AddReference('System.ServiceModel')

from System import Console
import System.ServiceModel

clr.AddReference('TestServiceInterface')

from TestServiceInterface import ImyService

mycf = System.ServiceModel.ChannelFactory[ImyService](

System.ServiceModel.BasicHttpBinding(),

System.ServiceModel.EndpointAddress("http://localhost:7000/myWcfService%22))

wcfcli = mycf.CreateChannel()

print r"IronPython WCF 服务的返回结果是:\n%s" % wcfcli.GetData(11)

Console.WriteLine("Press <ENTER> to terminate\n")
Console.ReadLine()