%% Feel free to use, reuse and abuse the code in this file.

-module(http_stream_body).

-export([init/2]).

init(Req, Opts) ->
	Body = proplists:get_value(body, Opts, "http_handler_stream_body"),
	Reply = proplists:get_value(reply, Opts),
	SFun = fun () ->
		cowboy_req:send_body(Body, nofin, Req)
	end,
	Req2 = case Reply of
		set_resp ->
			SLen = iolist_size(Body),
			cowboy_req:set_resp_body({stream, SLen, SFun}, Req);
		%% @todo Hmm that one will be sent as chunked now.
		%% We need an option to disable chunked.
		set_resp_close ->
			cowboy_req:set_resp_body({stream, undefined, SFun}, Req);
		set_resp_chunked ->
			%% Here Body should be a list of chunks, not a binary.
			SFun2 = fun () ->
				lists:foreach(fun (Data) -> cowboy_req:send_body(Data, nofin, Req) end, Body)
			end,
			cowboy_req:set_resp_body({stream, undefined, SFun2}, Req)
	end,
	{ok, cowboy_req:reply(200, Req2), Opts}.