将多部分/相关内容发送到SOAP服务.NET Core

Question

我正在尝试设置HttpRequestMessage的标头，以便向SOAP服务发送multipart/related HTTP消息。

标题需要看起来像这样：

  

多部分/相关;边界= MIMEBoundaryurn_uuid_7B970E2B89C4446286DDFDBFF7F19581;类型= “应​​用/ XOP + xml” 的;开始= “0.urn：UUID：4628599A1A934415B3EFB15A1888004B@ws.jboss.org>”;启动信息=“应用/肥皂+ xml”的;行动= “瓮：IHE：ITI：2007：ProvideAndRegisterDocumentSet-B”

但我无法弄清楚如何使用HttpRequestMessage设置它们。 这是我的代码：

using (var client = new HttpClient(handler))
{
   var request = new HttpRequestMessage()
   {
        RequestUri = new Uri(Host),
        Method = HttpMethod.Post
   };
   var boundary = Guid.NewGuid().ToString();
   var bytes = new ByteArrayContent(doc);
   bytes.Headers.ContentType = new MediaTypeHeaderValue("text/xml");
   var multi = new MultipartContent("related", boundary) {
         new StringContent(xml.ToString(), Encoding.UTF8, "text/xml"), 
         bytes
   };
   request.Content = multi;

   Log.Information(request.Headers.ToString());
   Log.Information(request.Content.Headers.ToString());
   Log.Information(request.Content.ToString());

   var response = client.SendAsync(request).Result;
   if (!response.IsSuccessStatusCode)
        throw new Exception($"Request resulted in status :{response.StatusCode}");                           
   var stream = response.Content.ReadAsStreamAsync().Result;
   using (var sr = new StreamReader(stream))
   {
        var soapResponse = XDocument.Load(sr);
        Log.Information("Soap response : " + soapResponse);
   }
}