代理模式

DesignPattern.sln

@@ -1,6 +1,8 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2012
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FactoryPattern", "FactoryPattern\FactoryPattern.csproj", "{B6F92CD5-5347-4F36-96CB-2ED8B9F66C25}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SingletonPattern", "SingletonPattern\SingletonPattern.csproj", "{1DC67A01-1D89-4D4B-A7E2-400B191FFB9D}"
@@ -11,6 +13,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PrototypePattern", "Prototy
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TemplateMethodPattern", "TemplateMethodPattern\TemplateMethodPattern.csproj", "{DB115CDB-2322-4155-AA43-C73AB014B132}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ProxyPattern", "ProxyPattern\ProxyPattern.csproj", "{DA636B4D-244C-40A4-9B34-63CB9DC45C2F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -37,6 +41,10 @@ Global
 		{DB115CDB-2322-4155-AA43-C73AB014B132}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{DB115CDB-2322-4155-AA43-C73AB014B132}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{DB115CDB-2322-4155-AA43-C73AB014B132}.Release|Any CPU.Build.0 = Release|Any CPU
+		{DA636B4D-244C-40A4-9B34-63CB9DC45C2F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{DA636B4D-244C-40A4-9B34-63CB9DC45C2F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{DA636B4D-244C-40A4-9B34-63CB9DC45C2F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{DA636B4D-244C-40A4-9B34-63CB9DC45C2F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

ProxyPattern/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1" />
+    </startup>
+</configuration>

ProxyPattern/ISearchEngine.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProxyPattern
+{
+    public interface ISearchEngine
+    {
+        void Search(string searchStr);
+    }
+
+    public class Google : ISearchEngine
+    {
+        public void Search(string searchStr)
+        {
+            string url = "https://www.google.com/search?q=";
+            var request = (HttpWebRequest)WebRequest.Create(url + searchStr);
+
+            var response = (HttpWebResponse)request.GetResponse();
+
+            if (response != null)
+            {
+                Console.WriteLine(string.Format("搜索【{0}】并成功返回！", searchStr));
+            }
+        }
+    }
+
+    public class GoogleProxy : ISearchEngine
+    {
+        private readonly ISearchEngine _vpn = null;
+
+        public GoogleProxy()
+        {
+            _vpn = new Google();
+        }
+
+        public void Search(string searchStr)
+        {
+            try
+            {
+                _vpn.Search(searchStr);
+            }
+            catch (Exception)
+            {
+                string url = "https://www.baidu.com/search?q=";
+                var request = (HttpWebRequest)WebRequest.Create(url + searchStr);
+
+                try
+                {
+                    var response = (HttpWebResponse)request.GetResponse();
+
+                    if (response != null)
+                    {
+                        Console.WriteLine(string.Format("搜索【{0}】并成功返回！", searchStr));
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Console.WriteLine(ex.Message);
+                }
+            }
+        }
+    }
+}

ProxyPattern/Program.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProxyPattern
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("直接访问Google：");
+            Google google = new Google();
+            try
+            {
+                google.Search("特朗普");
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine(ex.Message);
+            }
+            Console.WriteLine("----------------------------");
+            Console.WriteLine("使用代理访问Google：");
+            ISearchEngine searchEngine = new GoogleProxy();
+            searchEngine.Search("特朗普");
+
+            Console.ReadLine();
+        }
+    }
+}

ProxyPattern/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("ProxyPattern")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("ProxyPattern")]
+[assembly: AssemblyCopyright("Copyright ©  2016")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("da636b4d-244c-40a4-9b34-63cb9dc45c2f")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

ProxyPattern/ProxyPattern.csproj

@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{DA636B4D-244C-40A4-9B34-63CB9DC45C2F}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>ProxyPattern</RootNamespace>
+    <AssemblyName>ProxyPattern</AssemblyName>
+    <TargetFrameworkVersion>v4.5.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="ISearchEngine.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>