Question

我试图在asp .net C＃

中实现文件上传到我的WCF服务

以下是WCF服务器中用于文件上传的代码。

 public void FileUpload(string fileName, Stream fileStream)
       {
           FileStream fileToupload = new FileStream("D:\\FileUpload\\" + fileName, FileMode.Create);

        //   byte[] bytearray = new byte[10000];
           byte[] bytearray = new byte[1000];
           int bytesRead, totalBytesRead = 0;
           do
           {
               bytesRead = fileStream.Read(bytearray, 0, bytearray.Length);
               totalBytesRead += bytesRead;
               if(bytesRead > 0)
               fileToupload.Write(bytearray, 0, bytearray.Length);

           } while (bytesRead > 0);

         //  fileToupload.Write(bytearray, 0, bytearray.Length);
           fileToupload.Close();
           fileToupload.Dispose();



       }

以下是客户端上传文件的代码：（固定字节数组大小）

protected void bUpload_Click(object sender, EventArgs e)
{
    byte[] bytearray = null;
    Stream stream;
    string fileName = "";
    //throw new NotImplementedException();
    if (FileUpload1.HasFile)
    {
        fileName = FileUpload1.FileName;
        stream = FileUpload1.FileContent;
        stream.Seek(0, SeekOrigin.Begin);
        bytearray = new byte[stream.Length];
        int count = 0;
        while (count < stream.Length)
        {
            bytearray[count++] = Convert.ToByte(stream.ReadByte());
        }

    }

    string baseAddress = "http://localhost/WCFService/Service1.svc/FileUpload/";

    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(baseAddress + fileName);
    request.Method = "POST";
    request.ContentType = "text/plain";
    Stream serverStream = request.GetRequestStream();
    serverStream.Write(bytearray, 0, bytearray.Length);
    serverStream.Close();
    try
    {
        using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
        {
            int statusCode = (int)response.StatusCode;
            System.Diagnostics.Debug.WriteLine("statusCode: " + statusCode);

            StreamReader reader = new StreamReader(response.GetResponseStream());
            System.Diagnostics.Debug.WriteLine("reader: " + reader.ToString());

        }
    }
    catch (Exception ex)
    {
        System.Diagnostics.Debug.WriteLine("--- EXCEPTION ---");
        ex.ToString();
    }
}

这适用于小尺寸文件，当我尝试使用更大尺寸的文件时我将固定大小的字节数组更改为动态字节数组写入流。这是更新的代码：（用于发送数据的1024字节字节数组）

        request.Method = "POST";
        request.ContentType = "text/plain";
       // Stream serverStream = request.GetRequestStream();

        if (FileUpload1.HasFile)
        {
            fileName = FileUpload1.FileName;
            stream = FileUpload1.FileContent;
            stream.Seek(0, SeekOrigin.Begin);
            bytearray = new byte[1024];//stream.Length];


        }
        int TbyteCount = 0;
        Stream requestStream = request.GetRequestStream();

            int bufferSize = 1024;
            byte[] buffer = new byte[bufferSize];
            int byteCount = 0;
            while ((byteCount = stream.Read(buffer, 0, bufferSize)) > 0)
            {
                TbyteCount = TbyteCount + byteCount; 
                requestStream.Write(buffer, 0, byteCount);
            }

            requestStream.Close();


        try
        {
            using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
            {
                int statusCode = (int)response.StatusCode;
                System.Diagnostics.Debug.WriteLine("statusCode: " + statusCode);

                StreamReader reader = new StreamReader(response.GetResponseStream());
                System.Diagnostics.Debug.WriteLine("reader: " + reader.ToString());

            }
        }
        catch (Exception ex)
        {
            System.Diagnostics.Debug.WriteLine("--- EXCEPTION ---");
            ex.ToString();
        }
    }

但是在阅读回复时，我得到了例外 远程服务器返回错误：（413）请求实体太大。

我在请求流中多次写入是否正确！

我使用的文件大小为22.4 KB，使用第一个代码（固定大小的数组）成功上传如果我将文件大小分成1024字节的倍数并尝试发送则存在问题。

Web.config文件

<?xml version="1.0"?>
<configuration>
  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true"/>
  </appSettings>
  <system.web>
    <compilation debug="true"/>
  </system.web>
  <system.serviceModel>
    <services>
      <service name="WcfServiceApp.Service1" behaviorConfiguration="ServiceBehavior">
        <endpoint address="" binding="webHttpBinding" contract="WcfServiceApp.IService1" behaviorConfiguration="webBehaviour"/>
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:50327/Service1.svc"/>
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehavior">
          <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="webBehaviour">
          <webHttp/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <!--<protocolMapping>
      <add binding="basicHttpsBinding" scheme="https"/>
    </protocolMapping>-->
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true"/>
  </system.serviceModel>
  <system.webServer>
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*"/>
        <add name="Access-Control-Allow-Headers" value="Content-Type, Accept"/>
      </customHeaders>
    </httpProtocol>
    <directoryBrowse enabled="true"/>
  </system.webServer>
</configuration>

Answer 1

在您的服务绑定中，增加读者配额。在此处了解有关每个设置的详情https://msdn.microsoft.com/en-us/library/ms731325(v=vs.110).aspx。 Aslo调查这个https://msdn.microsoft.com/en-us/library/system.servicemodel.basichttpbinding.maxreceivedmessagesize(v=vs.100).aspx

Answer 2

当您尝试使用某种结构传输大型序列化对象时，此问题通常是由配置中maxItemsInObjectGraph的泄漏引起的。查看我的answer here

但在您的情况下，您尝试将简单数据文件作为字节流传输。要通过webHttpBinding执行此操作，您应指定正确的服务合同，该合同接受仅流消息作为输入。所有其他的东西，比如文件名，你可以在消息合约中指定为标题（实际上你可以用文件名作为参数来自URI）也可以。然后，您必须为绑定设置TransferMode = TransferMode.Streamed。一些code example is here还有一个with config samples is here。

其他Google广告搜索的关键字是 webhttpbinding streaming

WCF服务中的文件上载（413）请求实体太大

2 个答案: