c# - 使用客户端 Web 服务时出现内容错误

Question

我在使用客户端 Web 服务时出现以下错误。

Error: The content type text/xml;charset=utf-8 of the response message does not match the content type of the binding (application/soap+msbin1+gzip). If using a custom encoder, be sure that the IsContentTypeSupported method is implemented properly.

The first 807 bytes of the response were:

' soapenv:Client The request message must be sent using HTTP compression (RFC 1952 - GZIP). Please review the transmission instructions outlined in Section 5 of the AIR Submission Composition and Reference Guide located at https://www.irs.gov/for-Tax-Pros/Software-Developers/Information-Returns/Affordable-Care-Act-Information-Return-AIR-Program, correct any issues, and try again. TPE1112 '.==========================Error: System.Net.WebException: The remote server returned an error: (500) Internal Server Error. at System.Net.HttpWebRequest.GetResponse() at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)

我知道有很多关于此错误的文章，但我无法获得解决方案或提示，如何解决此问题？

基本上客户提供了 WSDL 文件，我已将其作为“服务引用”添加到我的控制台应用程序中。

这是我的配置文件

<bindings>
  <customBinding>
    <binding name="BulkRequestTransmitterBinding"  >
      <binaryMessageEncoding compressionFormat="GZip" />
      <httpsTransport/>
    </binding>
  </customBinding>
</bindings>
<client>
  <endpoint address="MYENDPOINTURL"
      binding="customBinding" 
      bindingConfiguration="BulkRequestTransmitterBinding"
      contract="CONTRACTNAME" 
      name="BulkRequestTransmitterPort" />
</client>

Answer 1

首先，您需要下载 this sample encoder from Microsoft

设置它并将其作为项目添加到您的解决方案中。之后您需要进行一些调整。

1. 首先您需要将内容类型更改为“text/xml”而不是“application/x-gzip”。通过改变

   class GZipMessageEncoder : MessageEncoder
   {
   static string GZipContentType = "application/x-gzip";
   

   到

   static string GZipContentType = "text/xml";
   

2. 在传输之前，您还需要更改内容编码 header ，this blog post describes it in more detail但代码在这里:

   using (new OperationContextScope(transmitter.InnerChannel))
   {
   // Add a HTTP Header to an outgoing request
   HttpRequestMessageProperty requestMessage = new HttpRequestMessageProperty();
   requestMessage.Headers["Content-Encoding"] = "gzip";
   OperationContext.Current.OutgoingMessageProperties[HttpRequestMessageProperty.Name] = requestMessage;
   
   var response = transmitter.BulkRequestTransmitter(
       securityHeader,
       security,
       ref businessHeader,
       transmitterManifestReqDtl,
       transmitterType);
   ParseSubmitResponse(response);
   }
   

3. IRS 在要求您发送压缩的所有内容的同时，以未压缩的格式响应(至少发送器部分，谁知道他们决定如何处理状态部分)因此需要禁用解压缩例程，它位于

   ZipEncoder.CZipMessageEncoderFactory.GZipMessageEncoder.DecompressBuffer
   

   你只需要注释掉using语句并交换

   int bytesRead = gzStream.Read(tempBuffer, 0, blockSize);
   

   与

   int bytesRead = memoryStream.Read(tempBuffer, 0, blockSize);
   

4. 接下来，您需要更改内部消息编码消息版本以与 IRS 兼容。所以在

   GZipEncoder.GZipMessageEncodingElement.ApplyConfiguration
   

   您需要将 TextMessageEncodingBindingElement 的构造函数更改为:

   binding.InnerMessageEncodingBindingElement =
       new TextMessageEncodingBindingElement(MessageVersion.Soap11WSAddressing10, Encoding.UTF8);
   

5. 至此，你就差不多准备好了，你只需要在 app.config 中添加一些东西你需要添加以下部分(Service model 是标记以供引用的部分):

   <system.serviceModel>
     <extensions>
       <bindingElementExtensions>
         <add name="gzipMessageEncoding" type="GZipEncoder.GZipMessageEncodingElement, GZipEncoder, Version=4.0.0.0, Culture=neutral, PublicKeyToken=null" />
       </bindingElementExtensions>
     </extensions>
   

6. 现在您可以使绑定(bind)看起来像这样:

   <binding name="BulkRequestTransmitterBinding">
     <gzipMessageEncoding innerMessageEncoding="textMessageEncoding" />
     <httpsTransport />
   </binding>
   

这样，您的代码应该成功传输到 IRS。