File extension/Image src does not end to server route but 404

[Zareix]

Which project does this relate to?

Start

Describe the bug

This behavior is a bit strange so I'll try to explain as best.

I have an API route like that :

// src/routes/api/files.ts
import { createFileRoute } from "@tanstack/react-router";

export const Route = createFileRoute("/api/files")({
  server: {
    handlers: {
      GET: async ({ request }) => {
        return Response.json({
          message: new URL(request.url).searchParams.get("filename"),
        });
    },
  },
});

If I call this endpoint with :

• http://localhost:3000/api/files?filename=something -> OK return the json
• http://localhost:3000/api/files?filename=something.png -> Returns error 404 : Cannot GET /api/files
• http://localhost:3000/api/files?filename=something.png&test=test -> OK return the json
• http://localhost:3000/api/files?filename=something.png with header Accept: text/html -> OK return the json
• http://localhost:3000/api/files?filename=anything inside an img src (because of header Sec-Fetch-Dest: image ?) -> Returns error 404 : Cannot GET /api/files

This because a big issue for create routes for img src.

Complete minimal reproducer

https://github.com/Zareix/tan-start-repro

Steps to Reproduce the Bug

1. Create a GET server route
2. Call it with a searchParams that as a image file extension

Expected behavior

It should send request to the server route everytime

Screenshots or Videos

No response

Platform

• Router / Start Version: 1.169.2
• OS: macOS
• Browser: Chrome
• Browser Version: 148.0.7778.96
• Bundler: vite (with bun)
• Bundler Version: 8.0.11

Additional context

No response

[schiller-manuel]

i suspect this is a nitro issue

cc @pi0

@Zareix does this occur if you disable nitro?

[Zareix]

i suspect this is a nitro issue

cc @pi0

@Zareix does this occur if you disable nitro?

Indeed it works without nitro plugin

[pi0]

Likely related to nitrojs/nitro#4252 (comment)

I have to investigate it properly since it is 3rd time we are regressing on patches in this area. Sorry for inconviniences.

[Zareix]

Ok thank you I'll track this issue
Btw it seems to be only on dev server