C# 让IIS托管的WCF服务中的流媒体正常工作
我被困在这里了 我的目标很简单:我想公开一个由IIS托管(然后是Windows Azure)的WCF服务,通过该服务,我可以使用流媒体上传文件,并添加一些有关我要上传的文件的元数据(文件名、MD5哈希所有常用内容…),并能够显示有关上传的准确进度信息 首先,我创建了一个派生类StreamWithProgress,它继承自FileStream,在这里我重写了Read方法,以在每次读取时引发一个事件,并传递进度信息 其次,我创建了一个WCF服务,使用MessageContract()将元数据和流对象包装到单个SOAP信封中。这个服务非常简单,只公开一个上传方法 我已将所有缓冲区大小设置为接受大量数据,如下所示:C# 让IIS托管的WCF服务中的流媒体正常工作,c#,wcf,iis,azure,C#,Wcf,Iis,Azure,我被困在这里了 我的目标很简单:我想公开一个由IIS托管(然后是Windows Azure)的WCF服务,通过该服务,我可以使用流媒体上传文件,并添加一些有关我要上传的文件的元数据(文件名、MD5哈希所有常用内容…),并能够显示有关上传的准确进度信息 首先,我创建了一个派生类StreamWithProgress,它继承自FileStream,在这里我重写了Read方法,以在每次读取时引发一个事件,并传递进度信息 其次,我创建了一个WCF服务,使用MessageContract()将元数据和流对象
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<?xml version="1.0"?>
<configuration>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="uploadBasicHttpBinding"
maxReceivedMessageSize="2147483647"
transferMode="Streamed"
messageEncoding="Mtom"
maxBufferPoolSize="2147483647"
maxBufferSize="2147483647">
<readerQuotas maxArrayLength="2147483647"
maxBytesPerRead="2147483647"
maxDepth="2147483647"
maxNameTableCharCount="2147483647"
maxStringContentLength="2147483647"/>
</binding>
</basicHttpBinding>
</bindings>
<behaviors>
<serviceBehaviors>
<behavior name="defaultBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
<dataContractSerializer maxItemsInObjectGraph="2147483647"/>
</behavior>
</serviceBehaviors>
</behaviors>
<!-- Add this for BufferOutput setting -->
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true"/>
<services>
<service name="WcfService1.Service1" behaviorConfiguration="defaultBehavior">
<endpoint binding="basicHttpBinding" contract="WcfService1.IService1" bindingConfiguration="uploadBasicHttpBinding"/>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
</service>
</services>
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
<system.web>
<compilation debug="true"/>
<httpRuntime maxRequestLength="2147483647" />
</system.web>
</configuration>
实际服务:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using System.IO;
using System.Web;
using System.ServiceModel.Activation;
namespace WcfService1
{
[MessageContract]
public class Encapsulator
{
[MessageHeader(MustUnderstand = true)]
public string fileName;
[MessageBodyMember(Order = 1)]
public Stream requestStream;
}
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class Service1 : IService1
{
public Service1()
{
HttpContext context = HttpContext.Current;
if (context != null)
{
context.Response.BufferOutput = false;
}
}
public void UploadStream(Encapsulator data)
{
const int BUFFER_SIZE = 1024;
int bytesRead = 0;
byte[] dataRead = new byte[BUFFER_SIZE];
string filePath = Path.Combine(@"C:\MiscTestFolder", data.fileName);
string logPath = Path.Combine(@"C:\MiscTestFolder", string.Concat(data.fileName, ".log"));
bytesRead = data.requestStream.Read(dataRead, 0, BUFFER_SIZE);
StreamWriter logStreamWriter = new StreamWriter(logPath);
using (System.IO.FileStream fileStream = new System.IO.FileStream(filePath, FileMode.Create))
{
while (bytesRead > 0)
{
fileStream.Write(dataRead, 0, bytesRead);
fileStream.Flush();
logStreamWriter.WriteLine("Flushed {0} bytes", bytesRead.ToString());
logStreamWriter.Flush();
bytesRead = data.requestStream.Read(dataRead, 0, BUFFER_SIZE);
}
fileStream.Close();
}
logStreamWriter.Close();
}
}
}
客户端app.config:
<?xml version="1.0"?>
<configuration>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="BasicHttpBinding_IService1" closeTimeout="00:01:00"
openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard"
maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536"
messageEncoding="Mtom" textEncoding="utf-8" transferMode="Streamed"
useDefaultWebProxy="true">
<readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384"
maxBytesPerRead="4096" maxNameTableCharCount="16384" />
<security mode="None">
<transport clientCredentialType="None" proxyCredentialType="None"
realm="" />
<message clientCredentialType="UserName" algorithmSuite="Default" />
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost/WcfService1/Service1.svc"
binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IService1"
contract="UploadService.IService1" name="BasicHttpBinding_IService1" />
</client>
</system.serviceModel>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
</configuration>
客户端主代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using CustomFileUploaderTester.UploadService;
using System.ServiceModel;
using System.IO;
namespace CustomFileUploaderTester
{
class Program
{
private static long bytesRead = 0;
static void Main(string[] args)
{
Service1Client client = new Service1Client();
using (StreamWithProgress fstream = new StreamWithProgress(@"C:\BladieBla\someFile.wmv", FileMode.Open))
{
client.InnerChannel.AllowOutputBatching = false;
fstream.ProgressChange += new EventHandler<StreamReadProgress>(fstream_ProgressChange);
client.UploadStream("someFile.wmv", fstream);
fstream.Close();
}
Console.ReadKey();
}
static void fstream_ProgressChange(object sender, StreamReadProgress e)
{
bytesRead += e.BytesRead;
Console.WriteLine(bytesRead.ToString());
}
}
}
使用系统;
使用System.Collections.Generic;
使用System.Linq;
使用系统文本;
使用CustomFileUploaderTester.UploadService;
使用System.ServiceModel;
使用System.IO;
命名空间CustomFileUploaderTester
{
班级计划
{
私有静态长字节读=0;
静态void Main(字符串[]参数)
{
Service1Client客户端=新的Service1Client();
使用(StreamWithProgress fstream=newstreamwithprogress(@“C:\BladieBla\someFile.wmv”,FileMode.Open))
{
client.InnerChannel.AllowOutBatching=false;
fstream.ProgressChange+=新事件处理程序(fstream\u ProgressChange);
UploadStream(“someFile.wmv”,fstream);
fstream.Close();
}
Console.ReadKey();
}
静态void fstream\u ProgressChange(对象发送方,StreamReadProgress e)
{
字节读取+=e.字节读取;
Console.WriteLine(bytesRead.ToString());
}
}
}
派生的文件流类(StreamWithProgress)
使用系统;
使用System.Collections.Generic;
使用System.Linq;
使用系统文本;
使用System.IO;
命名空间CustomFileUploaderTester
{
公共类StreamReadProgress:EventArgs
{
#区域公共财产
公共长字节阅读
{
得到;
设置
}
公共长线
{
得到;
设置
}
#端区
#区域构造函数
公共StreamReadProgress(长字节读取、长文件长度)
:base()
{
this.BytesRead=BytesRead;
this.Length=文件长度;
}
#端区
}
公共密封类StreamWithProgress:FileStream
{
#区域公共活动
公共事件事件处理程序变更;
#端区
#区域构造函数
公共流WithProgress(字符串文件路径、文件模式文件模式)
:base(文件路径、文件模式)
{
}
#端区
#区域覆盖
公共重写整型读取(字节[]数组、整型偏移量、整型计数)
{
int bytesRead=base.Read(数组、偏移量、计数);
此.RaiseProgressChanged(bytesRead);
返回字节读取;
}
#端区
#区域私人工作者方法
私有void RaiseProgressChanged(长字节读取)
{
EventHandler progressChange=this.progressChange;
if(progressChange!=null)
{
progressChange(this,newstreamreadprogress(bytesRead,this.Length));
}
}
#端区
}
}
--更新:2012-04-20
在安装了环回适配器之后,我使用RawCap跟踪了通信,发现数据实际上是流式传输的,但是IIS服务器在调用web方法之前正在缓冲所有数据
根据这篇文章:
WCF继承的是ASP.Net行为。。。但他们在谈论.Net 4.5中的修复:|
如果有人有任何其他的建议,这将是伟大的
谢谢 您正在将Mtom与流式传输模式一起使用。这可能会引起一些问题。请尝试删除Mtom。实际上,Mtom是一个非常古老的标准。此外,当使用具有流传输模式的SOAP服务时,我们只能有一个类型为Stream的参数。我们不能使用像封装器这样的自定义类型 构建文件u的建议解决方案
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using CustomFileUploaderTester.UploadService;
using System.ServiceModel;
using System.IO;
namespace CustomFileUploaderTester
{
class Program
{
private static long bytesRead = 0;
static void Main(string[] args)
{
Service1Client client = new Service1Client();
using (StreamWithProgress fstream = new StreamWithProgress(@"C:\BladieBla\someFile.wmv", FileMode.Open))
{
client.InnerChannel.AllowOutputBatching = false;
fstream.ProgressChange += new EventHandler<StreamReadProgress>(fstream_ProgressChange);
client.UploadStream("someFile.wmv", fstream);
fstream.Close();
}
Console.ReadKey();
}
static void fstream_ProgressChange(object sender, StreamReadProgress e)
{
bytesRead += e.BytesRead;
Console.WriteLine(bytesRead.ToString());
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace CustomFileUploaderTester
{
public class StreamReadProgress : EventArgs
{
#region Public Properties
public long BytesRead
{
get;
set;
}
public long Length
{
get;
set;
}
#endregion
#region Constructor
public StreamReadProgress(long bytesRead, long fileLength)
: base()
{
this.BytesRead = bytesRead;
this.Length = fileLength;
}
#endregion
}
public sealed class StreamWithProgress : FileStream
{
#region Public Events
public event EventHandler<StreamReadProgress> ProgressChange;
#endregion
#region Constructor
public StreamWithProgress(string filePath, FileMode fileMode)
: base(filePath, fileMode)
{
}
#endregion
#region Overrides
public override int Read(byte[] array, int offset, int count)
{
int bytesRead = base.Read(array, offset, count);
this.RaiseProgressChanged(bytesRead);
return bytesRead;
}
#endregion
#region Private Worker Methods
private void RaiseProgressChanged(long bytesRead)
{
EventHandler<StreamReadProgress> progressChange = this.ProgressChange;
if (progressChange != null)
{
progressChange(this, new StreamReadProgress(bytesRead, this.Length));
}
}
#endregion
}
}