A dynamic status API
Elena is a lightweight API that provides access to user-defined stati in JSON form. You can push status updates to Elena or configure it to pull for updates after a set delay. It also provides access to the history of a given status, if needed.
To run Elena, you will need Python and Flask, most somewhat recent versions
will do. Just start up run.py and you should be good to go. Edit config.py
to enter your database details.
To add a new status to the system, send a POST request to
your.server/set/statusname, adding the value to return later on in the POST
dictionary as value.
curl --data "value=True" http://example.com/set/online/
This will set the "online" status to true. Test this by requesting
your.server/get/statusname.
curl http://example.com/get/online
This should return the status and HTTP code 200. In case anything goes wrong, Elena will return a non-success HTTP code and an error message starting with "ERROR: ", so you can automate checking for errors easily. Successful requests that do not return a status return "Success!" in the HTTP body, as well as a 20X HTTP code.
You can change a status attribute by requesting your.server/atr/statusname,
attaching the attributes to change in the POST dictionary like this:
curl --data "history=true&pull=true&pull_url=example.com/api/online&pull_time=300" http://example.com/atr/online
This will enable history logging for the online stat as well as switching it
from push to pull, which means that if you request the status and it is older
than 5 minutes (300 seconds), it will check the pull_url and try to parse the
response. You can still push update for this status via .../set/online.
If you want to check the history of a status, you can access
your.server/hist/statusname to get all recorded status updates with
timestamps to work with.