forked from AkkomaGang/akkoma
33 lines
1,006 B
Markdown
33 lines
1,006 B
Markdown
# How to set rich media cache ttl based on image ttl
|
|
## Explanation
|
|
|
|
Richmedia are cached without the ttl but the rich media may have image which can expire, like aws signed url.
|
|
In such cases the old image url (expired) is returned from the media cache.
|
|
|
|
So to avoid such situation we can define a module that will set ttl based on image.
|
|
The module must adopt behaviour `Pleroma.Web.RichMedia.Parser.TTL`
|
|
|
|
### Example
|
|
|
|
```exs
|
|
defmodule MyModule do
|
|
@behaviour Pleroma.Web.RichMedia.Parser.TTL
|
|
|
|
@impl Pleroma.Web.RichMedia.Parser.TTL
|
|
def ttl(data, url) do
|
|
image_url = Map.get(data, :image)
|
|
# do some parsing in the url and get the ttl of the image
|
|
# return ttl is unix time
|
|
parse_ttl_from_url(image_url)
|
|
end
|
|
end
|
|
```
|
|
|
|
And update the config
|
|
|
|
```exs
|
|
config :pleroma, :rich_media,
|
|
ttl_setters: [Pleroma.Web.RichMedia.Parser.TTL.AwsSignedUrl, MyModule]
|
|
```
|
|
|
|
> For reference there is a parser for AWS signed URL `Pleroma.Web.RichMedia.Parser.TTL.AwsSignedUrl`, it's enabled by default.
|