c# - 从 Silverlight 使用 REST 服务时出现问题

Question

在我的 Web 项目中，我有一个包含 REST 服务的 TestStreamingService.svc 文件。

服务契约(Contract):

[ServiceContract(Namespace = "")]
    public interface ITestStreamingService
    {
        [OperationContract]
        [WebGet(UriTemplate = "Download?file={file}&size={size}")] //file irrelevant, size = returned size of the download
        Stream Download(string file, long size);

        [OperationContract]
        [WebInvoke(UriTemplate= "Upload?file={file}&size={size}", Method = "POST")]
        void Upload(string file, long size, Stream fileContent);

        [OperationContract(AsyncPattern=true)]
        [WebInvoke(UriTemplate = "BeginAsyncUpload?file={file}", Method = "POST")]
        IAsyncResult BeginAsyncUpload(string file, Stream data, AsyncCallback callback, object asyncState);

        void EndAsyncUpload(IAsyncResult ar);

    } 

服务实现(*.svc 文件)

使用系统；使用 System.IO；使用系统服务模型；使用 System.ServiceModel.Activation；使用 ICode.SHF.Tests;

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)][服务行为(InstanceContextMode=InstanceContextMode.Single)]公共(public)类 TestStreamingService : ITestStreamingService{

public Stream Download(string file, long size)
{
    return new SHFTestStream(size);
}

public void Upload(string file, long size, Stream fileContent)
{            
    FileInfo f = new FileInfo(String.Format(@"C:\{0}", file));

    using (FileStream fs = f.Create())
    {
        CopyStream(fileContent, fs);
        fs.Flush();
        fs.Close();
    }
}

public IAsyncResult BeginAsyncUpload(string file, Stream data, AsyncCallback callback, object asyncState)
{
    return new CompletedAsyncResult<Stream>(data, file);
}

public void EndAsyncUpload(IAsyncResult ar)
{
    Stream data = ((CompletedAsyncResult<Stream>)ar).Data;
    string file = ((CompletedAsyncResult<Stream>)ar).File;
    StreamToFile(data, file);
}

private void StreamToFile(Stream data, string file)
{
    string subDir = Guid.NewGuid().ToString("N");
    string uploadDir = Path.Combine(Path.GetDirectoryName(typeof(TestStreamingService).Assembly.Location), subDir);
    Directory.CreateDirectory(uploadDir);

    byte[] buff = new byte[0x10000];

    using (FileStream fs = new FileStream(Path.Combine(uploadDir, file), FileMode.Create))
    {
        int bytesRead = data.Read(buff, 0, buff.Length);
        while (bytesRead > 0)
        {
            fs.Write(buff, 0, bytesRead);
            bytesRead = data.Read(buff, 0, buff.Length);
        }
    }
}

公共(public)类 CompletedAsyncResult : IAsyncResult{ T数据；

string file;

public CompletedAsyncResult(T data, string file)
{ this.data = data; this.file = file; }

public T Data
{ get { return data; } }

public string File
{ get { return file; } }

#region IAsyncResult Members

public object AsyncState
{
    get { return (object)data; }
}

public System.Threading.WaitHandle AsyncWaitHandle
{
    get { throw new NotImplementedException(); }
}

public bool CompletedSynchronously
{
    get { return true; }
}

public bool IsCompleted
{
    get { return true; }
}

#endregion

我的 Web.Config

<?xml version="1.0"?>

<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->

<configuration>
    <system.web>
        <compilation debug="true" targetFramework="4.0" />
    </system.web>

    <system.serviceModel>
        <behaviors>          
            <serviceBehaviors>
                <behavior name="">                  
                    <serviceMetadata httpGetEnabled="true" />
                    <serviceDebug includeExceptionDetailInFaults="true"/>
                </behavior>              
            </serviceBehaviors>
          <endpointBehaviors>
            <behavior name="REST">
              <webHttp/>             
            </behavior>
          </endpointBehaviors>
        </behaviors>
        <bindings>
            <webHttpBinding>
                <binding name="ICode.SHF.SL.Tests.Web.TestStreamingService.customBinding0"/>                                                        
            </webHttpBinding>
        </bindings>
        <serviceHostingEnvironment aspNetCompatibilityEnabled="true"
            />
        <services>          
            <service name="ICode.SHF.SL.Tests.Web.TestStreamingService">
              <host>
                <baseAddresses>
                  <add baseAddress="http://localhost:40000/Streaming"/>
                </baseAddresses>
              </host>
                <endpoint name="TestStreamingEndpoint" address="RESTService" binding="webHttpBinding" bindingConfiguration="ICode.SHF.SL.Tests.Web.TestStreamingService.customBinding0"
                    contract="ICode.SHF.SL.Tests.Web.ITestStreamingService" behaviorConfiguration="REST"/>

                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />                
            </service>
        </services>
    </system.serviceModel>  
</configuration>

(使用 WebClient.OpenWriteAsync(用于上传)和 OpenReadAsync(用于下载))

用于客户端的 uri 是:“http://localhost:40000/Streaming/Service/Download?file=xxx&size=65536”

当我在 IE 中使用以下 uri 时:“http://localhost:40000/TestStreamingService.svc/Download?file=xxx&size=65536”下载操作开始并且下载的文件与传递的大小匹配。

虽然我在 WebClient 中使用 IE uri 没有成功。

任何人都可以向我解释我做错了什么吗？看来我错过了一些基本的东西......

Answer 1

您的网站是否需要身份验证？至于 fiddler ，请尝试将您的网络客户端连接到:

http://localhost.:40000/Streaming/Service/Download?file=xxx&size=65536

(注意 localhost 之后的额外点)