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Diffstat (limited to 'examples/eventsource/src/eventsource_handler.erl')
| -rw-r--r-- | examples/eventsource/src/eventsource_handler.erl | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/examples/eventsource/src/eventsource_handler.erl b/examples/eventsource/src/eventsource_handler.erl new file mode 100644 index 0000000..661057c --- /dev/null +++ b/examples/eventsource/src/eventsource_handler.erl @@ -0,0 +1,27 @@ +%% Feel free to use, reuse and abuse the code in this file. + +%% @doc EventSource emitter. +-module(eventsource_handler). + +-export([init/3]). +-export([info/3]). +-export([terminate/3]). + +init(_Transport, Req, []) -> + Headers = [{<<"content-type">>, <<"text/event-stream">>}], + {ok, Req2} = cowboy_req:chunked_reply(200, Headers, Req), + erlang:send_after(1000, self(), {message, "Tick"}), + {loop, Req2, undefined, 5000}. + +info({message, Msg}, Req, State) -> + ok = cowboy_req:chunk(["id: ", id(), "\ndata: ", Msg, "\n\n"], Req), + erlang:send_after(1000, self(), {message, "Tick"}), + {loop, Req, State}. + +terminate(_Reason, _Req, _State) -> + ok. + +id() -> + {Mega, Sec, Micro} = erlang:now(), + Id = (Mega * 1000000 + Sec) * 1000000 + Micro, + integer_to_list(Id, 16). |