C/AL, NAV2016, HttpWebRequest, processing fault response

northyen

How you do get the fault response InStream (or for that sake, file) from the HttpWebRequest, without modifying C1297?

NAV is posting to a webservice that returns status 422, which means that there are errors in the data supplied. I'm trying to find a way to get this information for further processing. Right now I just get the status "422 Unprocessable Entity", but not the response body.

It seems that SetTraceLogEnabled actually does this, but I'm unable to get the file name, and I'd prefer a stream anyhow.

ShaiHulud

Codeunit 1299 has a nice function for inspiration: "GetWebResponseError". However, personally, I didn't find it fully suitable for my needs, so I used parts of it and made my own handling that looks something like this:

IF NOT TryAPIRequest(HttpWebRequest_L,HttpWebResponse_L) THEN BEGIN //TryAPIRequest is a simplified version of COD1297's "GetWebResponse"
  DotNetExceptionHandler.Collect;
  IF NOT DotNetExceptionHandler.CastToType(WebException_L,GETDOTNETTYPE(WebException)) THEN
    DotNetExceptionHandler.Rethrow;
  IF ISNULL(WebException.Response) THEN
    DotNetExceptionHandler.Rethrow;
  HttpWebResponse := WebException.Response;
  ResponseStream := HttpWebResponse.GetResponseStream();

DotNetExceptionHandler: COD1291
Find other types in COD1299.GetWebResponseError

northyen

I found the solution late last night actually, that fits my needs. I got completely confused about the "WebException" part as it seem that the DotNet exceptions actually lives in some kind of super-global scope.

I.e. I don't have to think about scopes, parameters, references or anything like that. Confusing!

IF NOT HttpWebRequestMgt.GetResponse(Instr,HttpStatusCode,ResponseHeaders) THEN BEGIN
  FaultResponse := WebRequestHelper.GetWebResponseError(WebException, ServiceURL);

  IF NOT ISNULL(WebException.Response) THEN BEGIN
    Instr := WebException.Response.GetResponseStream;
    StreamToLog(Instr,"Function" + ' Response');
  END;
END;