Image is not being refetched if updated and behind the same url

[justChris]

🐛 Bug Report

When I update an image behind the same url, the server (firebase storage) sends a changed etag and last-modified header, but flutter_cached_network_image will not refetch the image or update the cache. However I will never see the updated image in the app.

E.g.: Sent headers by firebase storage:

expires: Sat, 04 Jan 2025 07:28:31 GMT
date: Sat, 04 Jan 2025 07:28:31 GMT
cache-control: private, max-age=0
last-modified: Fri, 03 Jan 2025 23:13:20 GMT
etag: "2c5956f09b373d887f07b829a943b80b"

Expected behavior

I'm expecting that the image's etag is checked every time the image is requested in the app and if that etag has changed flutter_cached_network_image should refetch the image and update the cache.

Reproduction steps

Just use flutter_cached_network_image with its default cache_manager.

Configuration

Version: 3.4.1

Platform:

• 📱 iOS
• 🤖 Android