C# SOAP 调用不断返回 500 错误

Question

在做了一些调查并阅读了几篇有关它的文章之后，特别是这篇文章：

• Soap 调用在 C# 中给出 500（内部服务器错误）

我想出了以下代码：

RequestingXMLData = @"<?xml version=""1.0"" encoding=""UTF-8""?>
                    <soapenv:Envelope xmlns:soapenv=""http://schemas.xmlsoap.org/soap/envelope/"" xmlns:urn=""urn:iaso-com:cloud:mansvc:15.12.0"">
                        <soapenv:Header/>
                        <soapenv:Body>
                            <urn:Authenticate>
                                <request>
                                    <partnerName>XXX</partnerName>
                                    <userName>XXX</userName>
                                    <password>XXX</password>
                                </request>
                            </urn:Authenticate>
                        </soapenv:Body>
                    </soapenv:Envelope>";

//Retrieves XML Data from API link / service, optional to spit XML to a given file location
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(ApiCallPath);
request.Method = "POST";
request.ContentType = "text/xml;charset=\"utf-8\"";
request.ContentLength = RequestingXMLData.Length;
using (Stream webStream = request.GetRequestStream())
using (StreamWriter requestWriter = new StreamWriter(webStream, System.Text.Encoding.ASCII))
{
    requestWriter.Write(RequestingXMLData);
}

try
{
    WebResponse webResponse = request.GetResponse();
    using (Stream webStream = webResponse.GetResponseStream())
    {
        if (webStream != null)
        {
            using (StreamReader responseReader = new StreamReader(webStream))
            {
                response = responseReader.ReadToEnd();
            }
        }
    }
}
catch (WebException e)
{
    var resp = new StreamReader(e.Response.GetResponseStream()).ReadToEnd();

}

return response;

我总是收到 500 错误the WebResponse webResponse = request.GetResponse();。

正如几篇文章中所建议的，我下载了 Fiddler，我从它得到的响应看起来不错（虽然没有使用它的经验，所以我可以关闭）：

Request Count:   1
Bytes Sent:      85     (headers:85; body:0)
Bytes Received:  107        (headers:107; body:0)
Tunnel Sent:     1.740
Tunnel Received: 4.900

ACTUAL PERFORMANCE
--------------
ClientConnected:    11:03:28.895
ClientBeginRequest: 11:03:28.900
GotRequestHeaders:  11:03:28.900
ClientDoneRequest:  11:03:28.901
Determine Gateway:  0ms
DNS Lookup:         0ms
TCP/IP Connect: 12ms
HTTPS Handshake:    0ms
ServerConnected:    11:03:28.916
FiddlerBeginRequest:    11:03:28.916
ServerGotRequest:   11:03:28.916
ServerBeginResponse:    00:00:00.000
GotResponseHeaders: 00:00:00.000
ServerDoneResponse: 00:00:00.000
ClientBeginResponse:    11:03:28.917
ClientDoneResponse: 11:03:28.917

    Overall Elapsed:    0:00:00.017

RESPONSE BYTES (by Content-Type)
--------------
~headers~: 107

接下来我做的就是尝试检索 WebException，这就是它返回的内容：

我还在 SOAP UI 中测试了它，在修复了 Java 错误之后，它似乎可以工作（因此身份验证数据也是正确的）。

一些附加信息：

• 调用的 SOAP 链接 = https://cloud.iaso.com/manserv
• API 信息https://www.iaso.com/kb/article.php?url=IASOARTICLE38（我发现很难阅读/理解。

请记住，我以前从未使用 SOAP 做过任何事情，所以如果问题看起来很明显，我深表歉意:)

Answer 1

首先你说：

 request.ContentType = "text/xml;charset=\"utf-8\"";

翻译：嘿，我收到一条消息，它是 XML 和 UTF8 字节编码的形式。

然后你会偷偷地做：

using (StreamWriter requestWriter = 
            new StreamWriter(webStream, System.Text.Encoding.ASCII))

翻译：传递一些黑暗的古老神秘（粘土）石板，其中包含一些 ASCII。

因此，请遵守您的承诺并使用：

using (StreamWriter requestWriter = 
            new StreamWriter(webStream, System.Text.Encoding.UTF8))

顺便说一句，当您处理基于 XML 的内容（例如soap 或什至html）时，UTF8 是最佳选择。

至于中止的异常，看来您的连接已提前释放。您可能想尝试将 try 语句放入 using 块中：

HttpWebRequest request = (HttpWebRequest) WebRequest.Create("")

request.Method = "POST";
request.ContentType = "text/xml;charset=\"utf-8\"";
request.ContentLength = RequestingXMLData.Length;
using (Stream webStream = request.GetRequestStream())
using (StreamWriter requestWriter = new StreamWriter(webStream, System.Text.Encoding.UTF8))
{
   requestWriter.Write(RequestingXMLData);

   try
   {
       WebResponse webResponse = request.GetResponse();
       using (Stream webStream = webResponse.GetResponseStream())
       {
            if (webStream != null)
            {
                 using (StreamReader responseReader = new StreamReader(webStream))
                 {
                     response = responseReader.ReadToEnd();
                 }
             }
       }
   }
   catch (WebException e)
   {
        var resp = new StreamReader(e.Response.GetResponseStream()).ReadToEnd();

   }
}