File upload REST service

I needed to create REST service which have capability to upload the file sent from the any client application consume this service.  To achieve this used Web API to create REST service. Following code snippets shows the REST service method written in FileUpload controller.

  /// 

  /// Uploads the file.
  /// 
  /// 
  /// Status of the file upload.
  /// 
  /// 
  public async Task UploadFile()
  {
   if (!Request.Content.IsMimeMultipartContent())
   {
    throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
   }

   string root = HttpContext.Current.Server.MapPath("~/App_Data");
   MultipartFormDataStreamProvider provider = new MultipartFormDataStreamProvider(root);

   try
   {
    await Request.Content.ReadAsMultipartAsync(provider);
    return Request.CreateResponse(HttpStatusCode.OK);
   }
   catch (System.Exception e)
   {
    return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
   }
  }

In this scenario client application would be MVC web application. Following shows code snippets for the view.

@{
    ViewBag.Title = "File Upload";
}


File Upload
@ViewBag.Message
@using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
 Upload File:
 
 
}

After needs to create controller action which can get the file from view and upload it via REST service. Action method code snippets shown in below. This controller contain with GET and POST action methods.

  /// 

  /// Indexes this instance.
  /// 
  /// 
  /// Result for the user given request.
  /// 
  [HttpGet]
  public ActionResult Index()
  {
   return View();
  }

  /// 

  /// Indexes the specified file.
  /// 
  /// 
  /// The uploaded file.
  /// 
  /// 
  /// Response for the status of the file upload.
  /// 
  [HttpPost]
  public async Task Index(HttpPostedFileBase file)
  {
   string uploadUrl = "http://localhost/FileUpload/api/FileUpload/UploadFile";

   if (file != null && file.ContentLength > 0)
   {
    try
    {
     using (HttpClient client = new HttpClient())
     {
      using (MultipartFormDataContent content = new MultipartFormDataContent())
      {
       BinaryReader br = new BinaryReader(file.InputStream);
       byte[] buffer = br.ReadBytes(file.ContentLength);
       br.Close();

       content.Add(new StreamContent(new MemoryStream(buffer)), "UploadedFiles", file.FileName);
       HttpResponseMessage httpResponse = await client.PostAsync(uploadUrl, content);

       if (httpResponse.IsSuccessStatusCode)
       {
        ViewBag.Message = "File uploaded successfully";
       }
      }
     }
    }
    catch (Exception ex)
    {
     ViewBag.Message = string.Format("ERROR: {0}", ex.Message);
    }
   }
   else
   {
    ViewBag.Message = "You have not specified a file.";
   }

   return View();
  }

Now run and test the application.