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taoensso.sente.interfaces

Alpha, subject to change.
Public interfaces / extension points.
Ref. https://github.com/ptaoussanis/sente/issues/425 for more info.

IPacker

protocol

clj

cljs

Extension pt. for client<->server comms data un/packers:
arbitrary Clojure data <-> serialized payloads.

NB if dealing with non-string payloads, see also
`taoensso.sente/*write-legacy-pack-format?*`.

members

pack

(pack _ x)
unpack
(unpack _ x)
IServerChan
protocol
clj
cljs
This protocol must be implemented by the "server channel" arguments
provided to callback functions via `ring-req->server-ch-resp`.
members
sch-send!
(sch-send! sch websocket? msg)
If the channel is open when called: sends a message over channel and
returns true. Otherwise noops and returns falsey.
sch-close!
(sch-close! sch)
If the channel is open when called: closes the channel and returns true.
Otherwise noops and returns falsey.
sch-open?
(sch-open? sch)
Returns true iff the channel is currently open.

IServerChanAdapter
protocol
clj
cljs
For Sente to support a web server, an "adapter" for that server
must be provided that implements this protocol.
members
ring-req->server-ch-resp
(ring-req->server-ch-resp sch-adapter ring-req callbacks-map)
Given a Ring request (WebSocket GET handshake or Ajax GET/POST),
returns a Ring response map appropriate for the underlying web server.

`callbacks-map` contains the following functions that MUST be called as described:

  `:on-open` - (fn [sch websocket?])
    Call exactly once after `sch` is available for sending.

  `:on-close` - (fn [sch websocket? status])
    Call exactly once after `sch` is closed for any cause, incl. an
    explicit call to `sch-close!`. `status` arg type is currently undefined.

  `:on-msg` - (fn [sch websocket? msg])
    Call for each `String` or byte[] message received from client.

  `:on-error` - (fn [sch websocket? error])
    Currently unused.

   Note: all `sch` ("server channel") args provided above MUST implement
   the `IServerChan` protocol.

`callbacks-map` contains the following functions IFF server is configured to
use 3-arity (async) Ring v1.6+ handlers:

  `:ring-async-resp-fn`  - ?(fn [ring-response])
  `:ring-async-raise-fn` - ?(fn [throwable])