How can user check for write permissions? (Without control permissions)

Build a Solid App Linked Data
1

Hi,
I am trying to create an app, where part of the functionality is access management to specific documents via ACL files.

I am now at a stage, where a user with Control permissions is able to read an ACL file and parse the permissions to find out, who has what level of access.

Now I would like to implement an editing functionality, that is only enabled for users, that have the Write access. The problem is, that a user with only read + write access is not allowed to read the ACL file, therefore they are not able to check if they have write access.

Of course I could try to write to the file to find out, if the user has the permissions to do so, but I would really like to use a more elegant solution.

Any ideas, how could I achieve this functionality?

I am using @inrupt/solid-react-components to read the ACL files, so using something from this package would be preferred, but any other methods are welcome as well.

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No one except those with Control access can read or write to an .acl file. So it is pointless for someone with only read+write to check if they have write access, because if they don’t have Control access, they can’t write anyway.

3

Also, the wac-allow header should show exactly what rights an agent has.

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4

Sorry, the initial description is maybe a little chaotic, English is not my first language.

The user with is viewing a file example.ttl, and I need to find out, whether they have write access to this particular file.

Thanks for the advice with the WAC-allow header, this seems like the elegant solution I was looking for.

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