grummle / flowuploadfilter

.Net MVC 5 Flow JS Filter

FlowUploadFilter

.Net MVC 5 Flow JS Filter

This is a MVC 5 pre-action filter that will handle uploads from the Flow.js library.

Install

PM> Install-Package FlowUploadFilter

Usage

using System.Net;
using System.Web.Mvc;
using FlowUploadFilter;
using WebGrease.Css.Extensions;

namespace WebApplication1.Controllers
{
    public class HomeController : Controller
    {
        [HttpPost]
        [FlowUpload("pdf","txt")]
        [ActionName("Upload")]
        public ActionResult Upload(FlowFile file)
        {
            return Json(new {derp=file.flowFilename});
        }
    }
}

The filter works by recognizing that FlowFile type is a paramater of the Action. When a 'chunk' from flow.js come in it will check to see if that chunk completes the file, if it does not it will accept the chunk, save it then respond with an accepted http status and skip execution of the actual Action. When the final chunk is recieved it will hydrate the FlowFile parameter of the Action and let excution of the Action proceed. Paramater name is not important, only the Parameter type. The filter uses Temp storage.

The chunk handling is based off of Dimitry Efimenko's FlowJs-MVC

flowuploadfilter's Issues

Is there a license?

Can you add a License? I'd like to use this in a project. Thanks

File-extensions configured in FlowUpload-Attribute are case sensitive

The FlowUpload-Attribute allows to specify accepted file-extensions:

[HttpPost]
[FlowUpload("png", "jpg")]
[ActionName("Upload")]
public ActionResult Upload(FlowFile file)
{
return Json(new { derp = file.flowFilename });
}

If a file is with the name "example.jpg" is uploaded everything works fine. As soon as the file-extension is for example uppercase ("example.JPG") the file isn't accepted for upload and the response from the Upload-Method isn't delivered to the caller.

I tracked down the problem down to FlowChunk.cs. Around line 66 you'll find the following statement:

 if (rules.AcceptedExtensions.Count > 0 && rules.AcceptedExtensions.SingleOrDefault(x => x == FileName.Split('.').Last()) == null)
                errorMessages.Add(rules.AcceptedExtensionsMessage ?? "type");

This code should accept files where the extension has a different case.