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我有点困在这里...获取流媒体在IIS托管WCF服务工作
我的目标很简单：我要揭露一个IIS托管（然后Windows Azure中）WCF服务，通过它我可以上传文件，使用流媒体，以及添加一些关于我想要上传的文件的META数据（文件名，MD5-hash所有常用的东西......），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从的FileStream，其中我已经覆盖了读方法引发一个事件与每个读通过我通过进度信息继承。
其次我创建使用MessageContract（http://msdn.microsoft.com/en-us/library/ms730255.aspx）来包装元数据的WCF服务和流对象到一个单一的SOAP信封。这项服务非常简单，仅提供一种上传方法。
我已经将所有的缓冲区大小，以接受大量的数据，按：
和的httpRuntime设置为每：
http://msdn.microsoft.com/en-us/library/e1f13641(v=vs.71).aspx和
http://kjellsj.blogspot.com/2007/02/wcf-streaming-upload-files-over-http.html
的IIS \ ASP兼容性设置按：
和禁用配料按：
- http://msdn.microsoft.com/en-us/library/system.servicemodel.icontextchannel.allowoutputbatching.aspx
我创建了一个自托管服务通过它上传成功。 然后我'升级'到IIS托管服务（在我的本地计算机上），它工作。 然后我创建了一个本地托管的Windows Azure服务，其中有一个工作的WCF卷轴，。
尽管如此，没有一个实例发生实际流式传输......所有这些实例都在发送数据之前对其进行了缓冲。
我遇到了这个问题，当我看到我的客户端正在报告进度，但服务器在整个文件被缓冲之后才开始写入文件。
我的实际代码如下。
任何想法\帮助？ 任何将不胜感激...
谢谢！
服务器的web.config：
<?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>
服务合同：
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;
namespace WcfService1
{
[ServiceContract]
public interface IService1
{
[OperationContract(IsOneWay=true)]
void UploadStream(Encapsulator data);
}
}
实际的服务：
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();
}
}
}
客户端的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());
}
}
}
派生FileStream类（StreamWithProgress）
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
}
}
- 更新：2012-04-20
后，我已经安装了环 - 我使用RawCap跟踪通信，并且看到数据实际上是流式传输的，但IIS服务器在调用之前缓存所有数据网络方法！
根据这个帖子：
http://social.msdn.microsoft.com/Forums/is/wcf/thread/cfe625b2-1890-471b-a4bd-94373daedd39
它是WCF继承ASP.Net行为......但是，他们在.NET 4.5谈论修复此：|
如果有人有任何其他建议，它将是伟大的！
谢谢！
如果您降低服务器端MaxBufferSize属性，它会产生什么影响吗？ – RichBower 2012-04-19 15:23:51
嗨RichBower，我试过，谢谢...在你的帖子后，我去了所有的ReaderQuota和绑定设置...但无济于事...... – mnemonic 2012-04-20 07:14:51