化零为整WCF(7) - 消息处理(使用消息传输优化机制

本文通过上传大文件的示例介绍了WCF中的MTOM（消息传输优化机制）。演示了如何通过配置MTOM来减少SOAP消息的大小，特别是在处理大型文件时。展示了服务端与客户端的具体实现。

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化零为整WCF(7) - 消息处理(使用消息传输优化机制 - MTOM)

作者： webabcd

介绍
WCF(Windows Communication Foundation) - 消息处理：MTOM(Message Transmission Optimization Mechanism) - 消息传输优化机制。本文以web方式上传大文件为例。

示例
1、服务
IMtom.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.ServiceModel;

using System.IO;

namespace WCF.ServiceLib.Message

{

/// <summary>

/// IMtom接口

/// </summary>

[ServiceContract]

public interface IMtom

{

/// <summary>

/// 上传文件

/// </summary>

/// <param name="path">文件目标路径</param>

/// <param name="fileData">文件字节数组</param>

[OperationContract]

void UploadFile( string path, byte[] fileData);

}

Mtom.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.ServiceModel;

using System.IO;

namespace WCF.ServiceLib.Message

{

/// <summary>

/// Mtom类

/// </summary>

public class Mtom : IMtom

{

/// <summary>

/// 上传文件

/// </summary>

/// <param name="path">文件目标路径</param>

/// <param name="fileData">文件字节数组</param>

public void UploadFile( string path, byte[] fileData)

{

FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);

fs.Write(fileData, 0, fileData.Length);

fs.Flush();

fs.Close();

}

2、宿主
Mtom.svc

<%@ ServiceHost Language="C#" Debug="true" Service="WCF.ServiceLib.Message.Mtom" %>

Web.config

<?xml version="1.0"?>
<configuration>
    <system.serviceModel>
        <services>
            
            
            <service name="WCF.ServiceLib.Message.Mtom" behaviorConfiguration="MessageBehavior">
                
                
                
                
                <endpoint address="" binding="wsHttpBinding" contract="WCF.ServiceLib.Message.IMtom" bindingConfiguration="MtomBindingConfiguration" />
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="MessageBehavior">
                    
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="true"/>
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <bindings>
            <wsHttpBinding>
                
                
                
                <binding name="MtomBindingConfiguration" messageEncoding="Mtom" maxReceivedMessageSize="1073741824" receiveTimeout="00:10:00">
                    
                    <readerQuotas maxArrayLength="1073741824" />
                </binding>
            </wsHttpBinding>
        </bindings>
    </system.serviceModel>
</configuration>

3、客户端
Mtom.aspx

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Mtom.aspx.cs"
        Inherits="Message_Mtom" Title="消息处理(使用消息传输优化机制 - MTOM)" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
        <p>
                MTOM(Message Transmission Optimization Mechanism) - 消息传输优化机制
        </p>
        <div>
                <ul>
                        <li>可以指定用 MTOM 还是 Text 对 SOAP 消息编码</li>
                        <li>抓soap消息的时候可以用tcpTrace</li>
                        <li>用17,766,901字节大小的文件测试：Text编码（soap大小：31,591,929字节）；MTOM编码（soap大小：23,696,066字节）</li>
                </ul>
        </div>
        <div>
                源文件：
                <asp:FileUpload ID="file" runat="server" />

                上传路径：
                <asp:TextBox ID="txtDestination" runat="server" Text="C:\"></asp:TextBox>

                <asp:Button ID="btnUpload" runat="server" Text="上传" OnClick="btnUpload_Click" />
        </div>
</asp:Content>

Mtom.aspx.cs

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.ServiceModel.Channels;

using System.IO;

public partial class Message_Mtom : System.Web.UI.Page

{

protected void Page_Load( object sender, EventArgs e)

{

}

protected void btnUpload_Click( object sender, EventArgs e)

{

var proxy = new MessageSvc.Mtom.MtomClient();

var length = file.PostedFile.ContentLength;

var bytes = new byte[length];

file.PostedFile.InputStream.Read(bytes, 0, length);

try

{

proxy.UploadFile(

txtDestination.Text + Path.GetFileName(file.PostedFile.FileName),

bytes);

Page.ClientScript.RegisterStartupScript( typeof(Page), "js", "alert('上传成功');", true);

}

catch (Exception ex)

{

Page.ClientScript.RegisterStartupScript( typeof(Page), "js", "alert('" + ex.ToString() + "');", true);

}

proxy.Close();

}

Web.config

<?xml version="1.0"?>
<configuration>
    <system.serviceModel>
        <client>
            
            
            
            
            
            
            <endpoint address="http://localhost:3502/ServiceHost/Message/Mtom.svc" binding="wsHttpBinding" contract="MessageSvc.Mtom.IMtom" bindingConfiguration="MtomBindingConfiguration" />
        </client>
        <bindings>
            <wsHttpBinding>
                
                
                <binding name="MtomBindingConfiguration" messageEncoding="Mtom" sendTimeout="00:10:00">
                    
                    <readerQuotas maxArrayLength="1073741824" />
                </binding>
            </wsHttpBinding>
        </bindings>
        <behaviors>
            <endpointBehaviors>
                <behavior name="MtomEndpointBehavior">
                    
                    <clientVia viaUri="http://localhost:8888/ServiceHost/Message/Mtom.svc" />
                </behavior>
            </endpointBehaviors>
        </behaviors>
    </system.serviceModel>
</configuration>

运行结果：
上传文件后提示上传成功

OK
[源码下载]

本文转自webabcd 51CTO博客，原文链接： http://blog.51cto.com/webabcd/344124 ，如需转载请自行联系原作者