在 Dynamics CRM 中的自定义工作流 activity 中使用 httpClient 发送 POST 请求会引发异常 "ThreadAbortException"

Question

我的任务是检索在名为“Denunciation”的实体中创建的数据，然后进行一些结构化并将此数据（以 JSON 字符串格式）发送到 API，因此我需要发出 POST 请求，一切正常，但是当我想发送 post 请求时，它抛出这个 Excpetion

异常详情：

System.Threading.ThreadAbortException
  HResult=0x80131530
  Message=The thread has been abandoned.
  Source=System
  StackTrace:
   at System.Net.CookieModule.OnSendingHeaders(HttpWebRequest httpWebRequest)
   at System.Net.HttpWebRequest.UpdateHeaders()
   at System.Net.HttpWebRequest.SubmitRequest(ServicePoint servicePoint)
   at System.Net.HttpWebRequest.BeginGetRequestStream(AsyncCallback callback, Object state)
   at System.Net.Http.HttpClientHandler.StartGettingRequestStream(RequestState state)
   at System.Net.Http.HttpClientHandler.PrepareAndStartContentUpload(RequestState state)
--- End of stack trace from previous location ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at HclsDeclareProspect.DeclareProspect.<Execute>d__28.MoveNext() in C:\Users\aimad.quouninich\Desktop\Projects\VDN\HclsDeclareProspect\DeclareProspect.cs:line 177

  This exception was originally thrown at this call stack:
    [External Code]
    HclsDeclareProspect.DeclareProspect.Execute(System.Activities.CodeActivityContext) in DeclareProspect.cs

我在执行方法中的代码：

        // Send POST request APIM
        CanalItem endpoint = CanalProvider.Retrieve(service, endpointReference);
        _trace += string.Format("Endpoint : {0} \r\n", endpoint.Name);
        _trace += string.Format("Endpoint Url : {0} \r\n", endpoint.Url);
        _trace += string.Format("Endpoint Login : {0} \r\n", endpoint.Login);
        _trace += string.Format("Endpoint Login : {0} \r\n", endpoint.Password);

        string url = $"{endpoint.Url}/denunciation";

        var content = new StringContent(requestJSON.ToString(), Encoding.UTF8, "application/json");
        content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

        HttpClient client = new HttpClient();

        client.DefaultRequestHeaders.Add("Apim-Subscription-Key", endpoint.Password);

        try
        {
            var result = await client.PostAsync(url, content);
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }

如果我删除了 try-catch 块，自定义工作流和 pluginRegistrationTool 将退出而不显示任何错误消息，并且后续行代码将不会执行。

我已经尝试了很多事情，比如使用 httpWebRequest 而不是 httpClient，但是当我尝试写入流时，它存在这个错误

System.Security.SecurityException
  HResult=0x8013150A
  Message=Type Authorization Request Failed 'System.Net.WebPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
  Source=mscorlib
  StackTrace:
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.CodeAccessPermission.Demand()
   at System.Net.HttpWebRequest.get_Proxy()
   at System.Net.WebRequest.GetRequestStreamAsync()
   at HclsDeclareProspect.DeclareProspect.<Execute>d__29.MoveNext() in C:\Users\aimad.quouninich\Desktop\Projects\VDN\HclsDeclareProspect\DeclareProspect.cs:line 186

  This exception was originally thrown at this call stack:
    [External Code]
    HclsDeclareProspect.DeclareProspect.Execute(System.Activities.CodeActivityContext) in DeclareProspect.cs

将此代码用于 HttpWebrequest 代替 httpClient：

       string url = $"{endpoint.Url}/denunciation";

        var content = new StringContent(requestJSON.ToString(), Encoding.UTF8, "application/json");
        content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

        var request = (HttpWebRequest)WebRequest.Create(new Uri(url));
        request.ContentType = "application/json";
        request.Method = "POST";
        request.Timeout = 4000; //ms
        var itemToSend = JsonConvert.SerializeObject(requestJSON);
        using (var streamWriter = new StreamWriter(await request.GetRequestStreamAsync()))
        {
            streamWriter.Write(itemToSend);
            streamWriter.Flush();
            streamWriter.Dispose();
        }

        // Send the request to the server and wait for the response:  
        using (var response = await request.GetResponseAsync())
        {
            // Get a stream representation of the HTTP web response:  
            using (var stream = response.GetResponseStream())
            {
                var reader = new StreamReader(stream);
                var message = reader.ReadToEnd();
            }
        }

我不知道该怎么做，请提供任何帮助。

Answer 1

已解决，

问题出在 Newtonsoft.json 包中。看起来 CRM 不接受 extern packages/assemblies 并且工具 Ilmerge（合并多个程序集）已被弃用并且不再受 CRM 支持。

当运行调试器和进程异步时，我没有注意到问题并且工作正常，所以我删除了 Newtonsoft.json 并使用了 built-in 解决方案，即 DataContractSerializer然后使用跟踪日志我能够看到 post 工作正常，但在调试时它不起作用程序只是退出，解决方案是在 post 请求代码行之后放置断点以便能够看到结果。

希望对遇到同样问题的其他人有所帮助。

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