Firefox shows "attempting to reconnect to server" on performing Download operation.

[sivakumars3442]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

We are attempting to execute a Download operation within the Blazor Server application by triggering a click on an anchor tag, and the download response is retrieved from the ASP.NET Core application, specifically downloading an image file located inside the wwwroot folder of the ASP.NET Core application.

Index.razor

@page "/"
@using Microsoft.AspNetCore.Mvc;
@using System.IO;
Click here to perform download using server response

HomeController.cs

namespace AspCore_Server.Controllers
{
[Route("api/[controller]")]
[EnableCors("AllowAllOrigins")]
public class HomeController : Controller
{
public IWebHostEnvironment hostingEnvironment;
public HomeController(IWebHostEnvironment hostingEnvironment)
{
this.hostingEnvironment = hostingEnvironment;
}
[Route("Download")]
public FileStreamResult Download()
{
string fullPath = this.hostingEnvironment.ContentRootPath + "\wwwroot\2.png";
FileStream fileStreamInput = new FileStream(fullPath, FileMode.Open, FileAccess.Read);
FileStreamResult fileStreamResult = new FileStreamResult(fileStreamInput, "APPLICATION/octet-stream");
fileStreamResult.FileDownloadName = "Custom.png";
return fileStreamResult;
}
}
}

Note: I'm using the latest version of Firefox browser.

Issue screenshot

Expected Behavior

The download process should finish without displaying the reconnecting modal.

Note: The reconnecting issue only occurs in the Firefox browser.

Steps To Reproduce

Please find the issue replicated GitHub sample from the below link.

https://github.com/sivakumars3442/Firefox-Reconnecting-issue

Run theBlazorApp-Firefox-Download application

Make sure to start the AspCore-Server application first, as the Blazor Server application relies on it to serve download responses.

Click the link on the Blazor index page

Exceptions (if any)

No response

.NET Version

No response

Anything else?

No response

[SteveSandersonMS]

Could you specify the version of ASP.NET Core you're using? Thanks.

[SteveSandersonMS]

Ah never mind, I see it's 7.0

Thanks for contacting us.

We're moving this issue to the .NET 9 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
To learn more about what to expect next and how this issue will be handled you can read more about our triage process here.

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.