HttpClient in using statement causes Task cancelled

Question

I created a FileResult : IHttpActionResult webapi return type for my api calls. The FileResult downloads a file from another url and then returns the stream to

Answer 1

I know that if the HttpClient is disposed before the asychronous call is finished the Task's state will change to canceled. However since I use an await in: Content = new System.Net.Http.StreamContent(await httpClient.GetStreamAsync(this.filePath)) that should prevent the HttpClient from being disposed off in the middle of the task completion.

But what does that task do? It gets the stream. So, your code ends up with a Stream that may or may not be completely read when it closes the HttpClient.

HttpClient is specifically designed for reuse (and simultaneous use), so I recommend removing the using completely and moving the HttpClient declaration to a static class member. But if you want to close and reopen the clients, you should be able to get it working by reading the stream entirely into memory before closing the HttpClient.