WCF 之 限制IP访问

自己之前做过的WCF从来没有限制过IP的访问，今天就来做一个限制IP访问的WCF服务小例子。

首先我们创建一个控制台程序，添加契约接口和实现类，添加配置文件

契约接口代码：

using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Text;

namespace ConsoleApplication1
{
    [ServiceContract]
    public interface IService
    {
        [OperationContract]
        string PrintTime();
    }
}

实现类代码，其中加上控制IP访问权限的方法：

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.Text;
using System.Configuration;

namespace ConsoleApplication1
{
    public class Service:IService
    {
        public string PrintTime()
        {
            //获取远端信息
            var ip = GetIpAddress();
            if (!AllowConnect(ip))
            {
                var msg = string.Format("IP:{0},不在允许的访问列表，禁止访问。", ip);
                Console.WriteLine(msg);
                throw new Exception(msg);
            }

            return DateTime.Now.ToString();
        }


        private string GetIpAddress()
        {
            var remote =
                OperationContext.Current.IncomingMessageProperties[RemoteEndpointMessageProperty.Name] as
                RemoteEndpointMessageProperty;
            return remote.Address;
        }

        public bool AllowConnect(string ip)
        {
            Tuple[] m_IpRanges;
            var ipRange = ConfigurationManager.AppSettings["IpRangeFilter"];

            string[] ipRangeArray;

            if (string.IsNullOrEmpty(ipRange)
                || (ipRangeArray = ipRange.Split(new char[] { ',', ';' }, StringSplitOptions.RemoveEmptyEntries)).Length <= 0)
            {
                throw new ArgumentException("The ipRange doesn't exist in configuration!");
            }

            m_IpRanges = new Tuple[ipRangeArray.Length];

            for (int i = 0; i < ipRangeArray.Length; i++)
            {
                var range = ipRangeArray[i];
                m_IpRanges[i] = GenerateIpRange(range);
            }



            var ipValue = ConvertIpToLong(ip);

            var iplist = new System.Collections.Generic.List();
            for (var i = 0; i < m_IpRanges.Length; i++)
            {
                var range = m_IpRanges[i];

                iplist.Add(range.Item1);
                iplist.Add(range.Item2);
            }
            iplist = iplist.OrderBy(a => a).ToList();//我这里认为，IP地址是成对出现的。那么，判断是否是符合标准的IP，则判断是否在范围内即可，或者范围外。
            for (var i = 1; i <= iplist.Count; i += 2)
            {
                var item = iplist[i];
                bool isodd = i % 2 == 1;
                if (isodd)//是奇数，代表是从列表的偶数位。1,3,5,7,9
                {
                    var last = iplist[i - 1];
                    if (last <= ipValue && item >= ipValue)
                        return true;
                }

            }
            return false;
        }
        private Tuple GenerateIpRange(string range)
        {
            var ipArray = range.Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries);

            if (ipArray.Length != 2)
                throw new ArgumentException("Invalid ipRange exist in configuration!");

            return new Tuple(ConvertIpToLong(ipArray[0]), ConvertIpToLong(ipArray[1]));
        }

        private long ConvertIpToLong(string ip)
        {
            var points = ip.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries);

            if (points.Length != 4)
                throw new ArgumentException("Invalid ipRange exist in configuration!");

            long value = 0;
            long unit = 1;

            for (int i = points.Length - 1; i >= 0; i--)
            {
                value += unit * Convert.ToInt32( points[i]);
                unit *= 256;
            }

            return value;
        }
    }
}

配置文件：

其中“” 就是我们设置的允许访问我们服务的IP段；如果你的IP没有在这个IP段里面，那么你就不能访问此服务。

using System;
using System.Collections.Generic;
using System.Linq;
using System.ServiceModel;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            using (ServiceHost host = new ServiceHost(typeof(ConsoleApplication1.Service)))
            {

                host.Opened += delegate
                {
                    Console.WriteLine("服务已经启动，按任意键终止服务！");
                };

                host.Open();
                Console.Read();
            }
        }
    }
}

启动我们的WCF服务！

WCF服务写好了，接下来我们就做一个Windos窗体客户端，直接添加服务引用，然后实体化来调用我们的服务。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ServiceReference1.ServiceClient service = new ServiceReference1.ServiceClient(); 

            label1.Text=service.PrintTime();
        }

    }
}

启动我们的客户端

点击按钮调用我们的WCF服务，会提示这样的错误！

再看看我们的WCF服务的提示：

你们的WCF是不是所有的IP都能访问呢？