Does async-cable require Falcon?

[zarqman]

Forgive me if I'm being dense, but does async-cable require Falcon? The readme hints that might be the case, but the gemspec doesn't require it.

Since a Puma benchmark runner exists, it seems like async-cable + puma might be a possible combination, but perhaps that's reading too much into things.

When attempted with Puma 6.6.1 + Rack 3.1.16 + Rails 8.0.2.1, I get this:

{ "time":"2025-09-21T18:54:51Z",
  "severity":"warn",
  "pid":1121,
  "oid":23416,
  "fiber_id":23424,
  "subject":"Async::Cable::Middleware",
  "message":["Abnormal client failure!","No async task available!"],
  "event":{
    "type":"failure",
    "root":"[path to app]",
    "class":"RuntimeError",
    "message":"No async task available!",
    "backtrace":[...]
  }
}

Thanks for any clarification as to what is or isn't possible!

[darkamenosa]

Yes. You have to change to falcon. Check the example in this repo.