%% Feel free to use, reuse and abuse the code in this file.
-module(http_stream_body).
-behaviour(cowboy_http_handler).
-export([init/3, handle/2, terminate/3]).
-record(state, {headers, body, reply}).
init({_Transport, http}, Req, Opts) ->
Headers = proplists:get_value(headers, Opts, []),
Body = proplists:get_value(body, Opts, "http_handler_stream_body"),
Reply = proplists:get_value(reply, Opts),
{ok, Req, #state{headers=Headers, body=Body, reply=Reply}}.
handle(Req, State=#state{headers=_Headers, body=Body, reply=Reply}) ->
SFun = fun(Socket, Transport) -> Transport:send(Socket, Body) end,
Req2 = case Reply of
set_resp ->
SLen = iolist_size(Body),
cowboy_req:set_resp_body_fun(SLen, SFun, Req);
set_resp_close ->
cowboy_req:set_resp_body_fun(SFun, Req);
set_resp_chunked ->
%% Here Body should be a list of chunks, not a binary.
SFun2 = fun(SendFun) -> lists:foreach(SendFun, Body) end,
cowboy_req:set_resp_body_fun(chunked, SFun2, Req)
end,
{ok, cowboy_req:reply(200, Req2), State}.
terminate(_, _, _) ->
ok.
