Upgrade website caching system

[pivilartisant]

Follow up: #55 (comment)

[SlnPons]

Hey @thomas-senechal could have a look at this issue & comment where it comes from and let me know the priority to address such improvement please?

[thomas-senechal]

Hey @thomas-senechal could have a look at this issue & comment where it comes from and let me know the priority to address such improvement please?

This issue is a bit old and come from when we implemented the cache.

My proposal was to have a way to store some metadata related to a website. So, if a website is immutable, we know we don't need to download it again, and we don't need to resolve the MNS domain. This would also open the door to some security features around immutable websites.

IMO, as we don't "officially" support immutable websites, I don't think this issue is a priority.

[thomas-senechal]

On the technical side:
I'd like to mention that we previously store zip archives of the websites. Now, we directly have each files stored in the SC. So, the DownloadDate seems irrelevant now. So the struct should look like:

type StoredWebsite struct {
	WebsiteAddress string
	Immutable      bool
	MNS            string
}

We also remade a cache system for DeWeb (here). So maybe this StoredWebsite should be used directly in the cache.

The details of the implementation still need to be discussed