HttpClient.PostAsync返回System.IO.Stream作为属性

Question

I have some legacy code that I'm trying to work with and need to return an existing object that contains a Stream from an ApiController

public class LegacyObject
{
    public bool Result { get; set; }
    public Stream Stream { get; set; }       
}

API Code

public class BindJson : System.Web.Http.Filters.ActionFilterAttribute
{
    public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
    {
        string rawRequest;
        using (var stream = new StreamReader(actionContext.Request.Content.ReadAsStreamAsync().Result))
        {
            stream.BaseStream.Position = 0;
            rawRequest = stream.ReadToEnd();
        }
        rawRequest = rawRequest.ToString();
        var obj  = JsonConvert.DeserializeObject<LegacyParameters>(rawRequest.ToString());
        actionContext.ActionArguments["parameter"] = obj;                
     }

}
public class ReportsController : ApiController
{
    [BindJson]
    [HttpPost]
    public LegacyObject ReturnReport([FromBody]LegacyParameters parameter)
    {           
        LegacyObject r = LegacyClass.GetReportStream(parameters);
        return r; //Object properties are correctly set and no errors at this point
    }
}

My call to the Api is

using (var httpClient = new System.Net.Http.HttpClient())
{
    httpClient.BaseAddress = new Uri("http://myserver/");

    string contents = JsonConvert.SerializeObject(paramList);

    var response = httpClient.PostAsync("/api/ReturnReport", new StringContent(contents, Encoding.UTF8, "application/json")).Result;                                        

}

I get a 500 Internal Server Error on the PostAsync when my LegacyObject.Stream has content. It works when the stream content is null. I'm working locally on my development PC and web server for the API is IIS Express.

Any advice would be appreciated.

Answer 1

So in order to get more detail on the 500 Internal Server Error, I added this to my projects WebApiConfig Register

config.Services.Replace(typeof(IExceptionLogger), new UnhandledExceptionLogger());

With this class

public class UnhandledExceptionLogger : ExceptionLogger
{
    public override void Log(ExceptionLoggerContext context)
    {
        var log = context.Exception.ToString();
        //Write the exception to your logs
    }
}

The log variable now gives me the detail I need to debug

FYI - The error was a read timeout on my Stream