Added request_options parameter to various classes and functions for canceling requests

[emojiiii]

Added request_options parameter to various classes and functions for canceling requests

closed #1182

[xenova]

This can be very useful! Thanks! Regarding the API, since this is pretty non-standard for the python library, perhaps a better approach would be to allow the user to pass their own fetch function instead of only allowing them to pass options? This could be useful for loading models from custom filesystems too.

In fact, I think this would be better at the env level. something like env.fetch = ...

[emojiiii]

This can be very useful! Thanks! Regarding the API, since this is pretty non-standard for the python library, perhaps a better approach would be to allow the user to pass their own fetch function instead of only allowing them to pass options? This could be useful for loading models from custom filesystems too.

In fact, I think this would be better at the env level. something like env.fetch = ...

You're right, I need some time to revisit it.

[emojiiii]

I added a custom fetch method, but after some thought, I realized that I still need to pass request_options as I do currently. Otherwise, every time an AbortController is used, I would need to reset env.customFetch, and there would be no way to cancel only specific fetches.