Enabling previews breaks audio node widgets

[christian-byrne]

Audio nodes are trying to get previews:

ComfyUI_frontend/src/extensions/core/uploadAudio.ts

Lines 20 to 34 in edb1349

	function getResourceURL(
	subfolder: string,
	filename: string,
	type: FolderType = "input"
	): string {
	const params = [
	"filename=" + encodeURIComponent(filename),
	"type=" + type,
	"subfolder=" + subfolder,
	app.getPreviewFormatParam().substring(1),
	app.getRandParam().substring(1),
	].join("&");
	return `/view?${params}`;
	}

Previews don't seem to be implemented for audio yet.

Terminal output:

Traceback (most recent call last):
  File "/home/c_byrne/projects/comfy-testing-environment/venv/lib/python3.11/site-packages/aiohttp/web_protocol.py", line 452, in _handle_request
    resp = await request_handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/venv/lib/python3.11/site-packages/aiohttp/web_app.py", line 543, in _handle
    resp = await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/venv/lib/python3.11/site-packages/aiohttp/web_middlewares.py", line 114, in impl
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/server.py", line 43, in cache_control
    response: web.Response = await handler(request)
                             ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/server.py", line 296, in view_image
    with Image.open(file) as img:
         ^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/venv/lib/python3.11/site-packages/PIL/Image.py", line 3339, in open
    raise UnidentifiedImageError(msg)
PIL.UnidentifiedImageError: cannot identify image file '/home/c_byrne/projects/comfy-testing-environment/ComfyUI/temp/ComfyUI_temp_tafpy_00002_.flac'

[christian-byrne]

Was fixed by comfyanonymous/ComfyUI#4044