正在将文本文件上载到WCF RESTful服务

我创建了一个简单的RESTful WCF服务，它有一个接收文件的方法和一个上传文件的简单客户端。这些文件都是简单的文本文件（当然我稍后会上传二进制文件）。

该服务将为许多类型的客户端发布，因此我希望使用不添加服务引用的实现。

我这样做对吗？

为什么我会收到远程服务器在我尝试上传一个简单的1Mb文本文件时返回了一个意外的响应：（400）错误请求错误？

编辑： 如果我的文件只有3.7kb，系统就能正常工作。这意味着我只需要配置服务来接受更大的数据包。我该怎么做

服务：

    /// <summary>
    /// Data Service REST service that handles data upload.
    /// </summary>
    [AspNetCompatibilityRequirements(
    RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
    public class DataService : Common.Contracts.IDataService
    {
        /// <summary>
        /// Uploads a data file to the server.
        /// </summary>
        /// <param name="filename">The filename.</param>
        /// <param name="fileContent">Content of the file.</param>
        public string UploadFile(string filename, Stream fileContent)
        {
            return filename;
        }
    }

服务配置

<system.serviceModel>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>
    <standardEndpoints>
        <webHttpEndpoint>
            <!--
        Configure the WCF REST service base address 
        via the global.asax.cs file and the default endpoint
        via the attributes on the <standardEndpoint> element below
    -->
            <standardEndpoint name="" helpEnabled="true"
             automaticFormatSelectionEnabled="true"/>
        </webHttpEndpoint>
    </standardEndpoints>
</system.serviceModel>

合同：

    /// <summary>
    /// Data Service service contract interface.
    /// </summary>
    [ServiceContract]
    public interface IDataService
    {
        /// <summary>
        /// Uploads a data file to the server.
        /// </summary>
        /// <param name="filename">The filename.</param>
        /// <param name="fileContent">Content of the file.</param>
        [WebInvoke(UriTemplate = "/upload?filename={filename}", 
        Method = "POST", ResponseFormat = WebMessageFormat.Xml)]
        string UploadFile(string filename, System.IO.Stream fileContent);
    }

客户端

WebChannelFactory<IDataService> cf = 
new WebChannelFactory<IDataService>(
                  new Uri(Settings.Default.UrlService));
IDataService channel = cf.CreateChannel();
StreamReader fileContent = new StreamReader(path, false);
string response = channel.UploadFile(path, fileContent.BaseStream);

<standardEndpoint name="" helpEnabled="true" automaticFormatSelectionEnabled="true" maxBufferSize="500000" maxReceivedMessageSize="500000" >          
          <readerQuotas maxDepth="2147483647" maxStringContentLength="2147483647"
            maxArrayLength="2147483647" maxBytesPerRead="2147483647" maxNameTableCharCount="2147483647" />          
        </standardEndpoint>