# `Ankusa.Edge.Router`
[🔗](https://github.com/jamescarr/ankusa/blob/ankusa-v0.7.0/packages/ankusa/lib/ankusa/edge/router.ex#L1)

The Bandit edge. Minimal work on the hot path, in the order that keeps
an unauthenticated caller from costing anything: resolve the catch URL
(`Ankusa.RouteResolver`, default `POST /webhooks/:source_id`) to a
`Ankusa.Route`, refuse on a `Content-Length` over the limit, look the source
up (`Ankusa.Edge.Ingest.lookup/2`), refuse a `Content-Length` over the
tenant's own `max_body_bytes` (`413`), charge the pre-read limits (per client
address, per node, per source bytes: `429`, `Ankusa.Edge.RateLimiter.pre_read/4`),
refuse header bytes no sink can carry (`400 invalid_header`), only then read
the body (bounded in size by the tenant's cap, and in time by
`listener.request_deadline_ms`: `408`), and hand off to `Ankusa.Edge.Ingest`.
A body with no declared length is charged to its source once it has been read.
A request refused at any step before the read is answered without its body
being read. No JSON parsing here.

The instance name is passed through `init/1` (`plug: {Ankusa.Edge.Router,
instance: :default}`) and is available as `opts` inside each route.

# `call`

# `init`

---

*Consult [api-reference.md](api-reference.md) for complete listing*