"created_at" should be an instanse of Date class

[TestPolygon]

Currently I can format a date only if the date is the "date" field. For example: {date:%Y.%m.%d}.

However, for some extractors the "date" field is missing. (That is strange that this field is missing even if the requested images are fetches with the correct "last-modified" header). For my expectation this field ("date") should be present for all extractors (if it is possible).

But there is "created_at" field. But this field is just a string and I can't format it.

[mikf]

The formattable date fields are done on a per-extractor basis, usually by using other metadata fields such as created_at and parsing/converting them to a datetime object. Each site usually has its own date/time format and it is therefore not possible automate this.

Let me know for which site(s) you'd like to have a date field and I'll add it.

That is strange that this field is missing even if the requested images are fetches with the correct "last-modified" header

#858

[TestPolygon]

For example, rule34, sankaku.

[mikf]

rule34, sankaku, and all other *booru sites now have a formattable date field:
a3a863f, ecdea79, cc15fbe

(and getting posts from sankaku should be significantly faster)

[TestPolygon]

gfycat, redgifs also have the missed date. But there is createDate number field.

gifdeliverynetwork too.

BTW, downloading of gfycat's URLs may not work if they redirect to gifdeliverynetwork.
in this case I get [redgifs][error] HttpError: '404 Not Found' for 'https://napi.redgifs.com//v1/gfycats/...

UnpleasantMessyGuillemot AbsoluteSoreIberianmole BitterFrigidHammerheadbird

[mikf]

56ccb99 adds a date field for gfycat and redgifs,
f2b83b8 fixes the 404 Not Found errors on redgifs/gifdeliverynetwork,
and aac00a2 adds a way to format any timestamp value like date fields.