Make CustomJSONEncoder a documented public API

[simonw]

It's used by datasette-geojson here: eyeseast/datasette-geojson@902bf13

[simonw]

datasette/datasette/utils/__init__.py

Lines 163 to 178 in 7b48664

	class CustomJSONEncoder(json.JSONEncoder):
	def default(self, obj):
	if isinstance(obj, sqlite3.Row):
	return tuple(obj)
	if isinstance(obj, sqlite3.Cursor):
	return list(obj)
	if isinstance(obj, bytes):
	# Does it encode to utf8?
	try:
	return obj.decode("utf8")
	except UnicodeDecodeError:
	return {
	"$base64": True,
	"encoded": base64.b64encode(obj).decode("latin1"),
	}
	return json.JSONEncoder.default(self, obj)

[simonw]

I had forgotten this had special handling for cursors!

The default representation of a row as a tuple rather than a dictionary might not be the right thing to do based on:

• Redesign default .json format #782

[eyeseast]

Yes please, and thank you. I realized I was maybe getting myself in trouble using that, but I think it's a good way to standardize JSON handling.