.NET 4.5 HttpTaskAsyncHandler cargar un archivo

Question

Estoy tratando de encontrar la forma de usar los nuevos asinters asinnc asp.net 4.5 así como Request.GetBufferlessInputStream para escribir una carga de imágenes en el disco. Este código se ejecuta y escribe un archivo, pero la imagen está dañada y no estoy seguro de por qué. Aquí está el código que estoy usando

public class UploadHandler : HttpTaskAsyncHandler 
{ 
    public override Task ProcessRequestAsync(HttpContext context) 
    { 
     // Gets a Stream object that can be used to read the 
     // incoming HTTP entity body, optionally disabling the 
     // request-length limit that is set in the MaxRequestLength property. 

     // This method provides an alternative to using the 
     // InputStream property. The InputStream property waits until the 
     // whole request has been received before it returns a Stream object. 
     // In contrast, the GetBufferlessInputStream method returns 
     // the Stream object immediately. 
     // You can use the method to begin processing the 
     // entity body before the complete contents of the 
     // body have been received. 
     // The entity body (or as much of it as you request and has 
     // been received) is returned only when you use the object that 
     // is returned by this method to read the stream, by calling 
     // methods such as the Read method. You use parameters of the 
     // Read method to specify how much of the entity body to read. 

     // This method can be useful if the request is uploading a 
     // large file and you want to begin accessing the file contents 
     // before the upload is finished. 
     // However, you should only use this method for scenarios where 
     // you want to take over all processing of the entity body. 
     // This means that you cannot use this method from an .aspx page, 
     // because by the time an .aspx page runs, the entity body 
     // has already been read. 

     using (Stream input = context.Request.GetBufferlessInputStream(true)) 
     using (var file = new FileStream("C:\\myfile.jpg", FileMode.Create, 
      FileAccess.Write, FileShare.Write)) 
     { 
      input.CopyTo(file); 
     } 

     context.Response.ContentType = "text/plain"; 
     return context.Response.Output.WriteAsync("Done"); 
    } 
} 

Answer 1

Bueno, parece que hay una manera fácil de manejar esto ahora usando ASP.NET Web Api!

leer sobre ello aquí: http://blogs.msdn.com/b/henrikn/archive/2012/03/01/file-upload-and-asp-net-web-api.aspx

Use uno de estos chicos malos MultipartFormDataStreamProvider

Answer 2

no probando realmente su código Noté una cosa. ¿No debería su Response.ContentType = image/gif también debería la transmisión ser un BinaryStream en lugar de una transmisión normal ya que es una Imagen con la que está trabajando ...?