1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
-module(switch_handler_h).
-export([init/2]).
-export([content_types_provided/2]).
-export([provide/2]).
-export([info/3]).
init(Req, State) ->
{cowboy_rest, Req, State}.
content_types_provided(Req, State) ->
{[{<<"text/plain">>, provide}], Req, State}.
provide(Req0, run) ->
Req = cowboy_req:stream_reply(200, Req0),
send_after(0),
{{switch_handler, cowboy_loop}, Req, 0};
provide(Req0, hibernate) ->
Req = cowboy_req:stream_reply(200, Req0),
send_after(0),
{{switch_handler, cowboy_loop, hibernate}, Req, 0}.
send_after(N) ->
erlang:send_after(100, self(), {stream, msg(N)}).
msg(0) -> <<"Hello\n">>;
msg(1) -> <<"streamed\n">>;
msg(2) -> <<"world!\n">>;
msg(3) -> stop.
info({stream, stop}, Req, State) ->
{stop, Req, State};
info({stream, What}, Req, State) ->
cowboy_req:stream_body(What, nofin, Req),
send_after(State + 1),
{ok, Req, State + 1}.
|
