I want to return a file in my ASP.Net Web API Controller, but all my approaches return the HttpResponseMessage
as JSON.
public async Task<HttpResponseMessage> DownloadAsync(string id)
{
var response = new HttpResponseMessage(HttpStatusCode.OK);
response.Content = new StreamContent({{__insert_stream_here__}});
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
return response;
}
When I call this endpoint in my browser, the Web API returns the HttpResponseMessage
as JSON with the HTTP Content Header set to application/json
.
If this is ASP.net-Core then you are mixing web API versions. Have the action return a derived IActionResult
because in your current code the framework is treating HttpResponseMessage
as a model.
[Route("api/[controller]")]
public class DownloadController : Controller {
//GET api/download/12345abc
[HttpGet("{id}"]
public async Task<IActionResult> Download(string id) {
Stream stream = await {{__get_stream_based_on_id_here__}}
if(stream == null)
return NotFound(); // returns a NotFoundResult with Status404NotFound response.
return File(stream, "application/octet-stream"); // returns a FileStreamResult
}
}