Elusive TLS Windows issue with binary data (png files)

[trgwii]

Okay, this is a very strange issue, so I'm not very sure where to put this. Let's say I have this Deno HTTPS server:

import { serveTLS } from "https://deno.land/[email protected]/http/server.ts";

const server = serveTLS({
  port: 443,
  hostname: "0.0.0.0",
  certFile: "cert/fullchain.pem",
  keyFile: "cert/key.pem",
});

for await (const req of server) {
  (async () => {
    const file = await Deno.open("image.png");
    await req.respond({
      headers: new Headers({
        "Content-Type": "image/png",
      }),
      body: file,
    });
    await req.done;
    file.close();
  })();
}

Using the following image file:

I'm on Windows 10.0.19042.804.

(Edit) Deno version:

deno 1.8.0 (release, x86_64-pc-windows-msvc)
v8 9.0.257.3
typescript 4.2.2

On Windows, when I request this server from a browser or curl, it seems to only load the first 64KiB and then hang the request:

If I run the same program in Deno in WSL (1) it works completely fine.

Also if I try to set the file to a 2.5MB JS file, it loads the entire file fine on Windows too, and doesn't hang the request, so there seems to be something that ONLY fails for Windows + binary files going on here.

Am I doing something wrong in my code?

[kt3k]

probably related to denoland/std#750. Can you reproduce this issue with v1.7.0? (you can downgrade deno by the command deno upgrade --version 1.7.0

[ry]

Reopening. Fix revert in #10595. False alarm