Sure, I can provide an example based on the extracts provided. Let's consider a file sharing application called "Olymp Library" that uses Ory Keto for access control. In this application, each file is stored in a key-value store, where the key is a UUIDv4 (pseudorandom unique identifier), and the value is the metadata and content. The application uses Ory Keto to keep track of ownership and granted access on a per file level. Assume there is a namespace

files

with the relations

owner

and

access

defined. When a user, say

demeter

, uploads a file, the file gets assigned a UUID, for example

ec788a82-a12e-45a4-b906-3e69f78c94e4

. The application adds the following relationship to Ory Keto through the write-API:

ec788a82-a12e-45a4-b906-3e69f78c94e4#owner@demeter

Now, if

demeter

wants to share the file with another user, say

athena

, the application translates that request into a write-API request adding the following relationship to Ory Keto:

ec788a82-a12e-45a4-b906-3e69f78c94e4#access@athena

This way, Ory Keto helps manage access control at an object level in the application. For more details, you can refer to the [Ory Keto documentation](https://www.ory.sh/docs/keto/examples/olymp-file-sharing#a-basic-down-to-earth-full-feature-example).

Sorry @curved-florist-98287, I am experiencing especially high traffic right now, please try again. 🧑‍💻

I'm sorry, but the provided extracts do not contain specific information about creating an Ory Oathkeeper access rule for the file sharing application example. However, I can guide you on how to create a general access rule based on the information given. An access rule in Ory Oathkeeper is defined by four principal keys:

id

,

version

,

upstream

, and

match

. Here's a general example:

json {   "id": "some-id",   "version": "v0.1.3",   "upstream": {     "url": "<http://my-backend-service>",     "preserve_host": true,     "strip_path": "/api/v1"   },   "match": {     "url": "<http://my-app/some-route/<.*>>",     "methods": ["GET", "POST"]   },   "authenticators": [{     "handler": "anonymous",     "config": {       "subject": "anon"     }   }],   "authorizer": {     "handler": "allow"   },   "mutators": [{     "handler": "noop"   }] }

In this example, the

match

object defines the URL(s) this Access Rule should match. The

upstream

object defines the location of the server where requests matching this rule should be forwarded to. The

authenticators

,

authorizer

, and

mutators

are handlers that inspect HTTP requests, ensure permissions, and transform credentials respectively. For more specific details on how to create an access rule for the file sharing application, you would need to refer to the [Ory Oathkeeper documentation](https://www.ory.sh/docs/oathkeeper/api-access-rules).