File Upload not working in RN / Expo

[klydra]

What version of Elysia is running?

1.1.20

What platform is your computer?

Windows 11 x64

What steps can reproduce the bug?

API :

new Elysia().put(
  "upload",
  async ({ body }) => {
    await Bun.write("test.txt", body.file);
  },
  {
    body: t.Object({
      file: t.File(),
    }),
  },
);

What is the expected behavior?

File to upload

What do you see instead?

eden >= 1.0.13 throws Network request failed

eden <= 1.0.12 actually calls API and produces error (code: 422)

{
  "type": "validation",
  "on": "body",
  "summary": "Expected kind 'File'",
  "property": "/file",
  "message": "Expected kind 'File'",
  "expected": {
    "file": "File"
  },
  "found": {
    "file": "File"
  },
  "errors": [
    {
      "summary": "Expected kind 'File'",
      "type": 31,
      "schema": {
        "default": "File",
        "type": "string",
        "format": "binary"
      },
      "path": "/file",
      "value": "File",
      "message": "Expected kind 'File'",
      "errors": []
    }
  ]
}

Additional information

Eden Client is running on expo SDK 51 on Android.
Same function is working just fine in any version of Elysia on web.
All other API calls work fine.

Have you try removing the node_modules and bun.lockb and try again yet?

Yes

[klydra]

For anyone else running into this issue, I'm currently using this something like this as a workaround in the meantime.
It's less than optimal in so many ways, espeacially memory wise I'm sure, but works.

new Elysia().put(
  "upload",
  async ({ body }) => {
    if ("bytes" in body && body.bytes.length >= 10 * 1000 * 1000)
      return error(400, "file size limit exceeded");

    const path = "test.txt";

    if ("bytes" in body) await Bun.write(path, new Uint8Array(body.bytes));
    if ("file" in body) await Bun.write(path, body.file);
  },
  {
    body: t.Union([
      t.Object({
        bytes: t.Array(t.Number({ minimum: 0, maximum: 255 })),
      }),
      t.Object({
        file: t.File({
          maxSize: "10m",
        }),
      }),
    ]),
  },
);

[klydra]

There seem to be semi-related issues which discuss switching to formdata for the file content. But as far as I can tell, that should be a non-issue by now. I also tried to manually set the type in the route to "formdata" or "multipart/form-data", but could not observe any meaningful difference.