Fix echo_post example

examples/echo_post/src/echo_post_app.erl

@@ -16,9 +16,9 @@ start(_Type, _Args) ->
 			{"/", toppage_handler, []}
 		]}
 	]),
-	{ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
-		{env, [{dispatch, Dispatch}]}
-	]),
+	{ok, _} = cowboy:start_clear(http, 100, [{port, 8080}], #{
+		env => #{dispatch => Dispatch}
+	}),
 	echo_post_sup:start_link().
 
 stop(_State) ->

examples/echo_post/src/toppage_handler.erl

@@ -14,16 +14,19 @@ init(Req, Opts) ->
 maybe_echo(<<"POST">>, true, Req) ->
 	{ok, PostVals, Req2} = cowboy_req:body_qs(Req),
 	Echo = proplists:get_value(<<"echo">>, PostVals),
-	echo(Echo, Req2);
+	echo(Echo, Req2),
+	Req2;
 maybe_echo(<<"POST">>, false, Req) ->
-	cowboy_req:reply(400, [], <<"Missing body.">>, Req);
+	cowboy_req:reply(400, [], <<"Missing body.">>, Req),
+	Req;
 maybe_echo(_, _, Req) ->
 	%% Method not allowed.
-	cowboy_req:reply(405, Req).
+	cowboy_req:reply(405, Req),
+	Req.
 
 echo(undefined, Req) ->
 	cowboy_req:reply(400, [], <<"Missing echo parameter.">>, Req);
 echo(Echo, Req) ->
-	cowboy_req:reply(200, [
-		{<<"content-type">>, <<"text/plain; charset=utf-8">>}
-	], Echo, Req).
+	cowboy_req:reply(200, #{
+		<<"content-type">> => <<"text/plain; charset=utf-8">>
+	}, Echo, Req).

test/examples_SUITE.erl

@@ -111,3 +111,22 @@ do_echo_get(Transport, Protocol, Config) ->
 	{response, nofin, 200, _} = gun:await(ConnPid, Ref),
 	{ok, <<"this is fun">>} = gun:await_body(ConnPid, Ref),
 	ok.
+
+echo_post(Config) ->
+	doc("POST parameter echo example."),
+	try
+		do_compile_and_start(echo_post),
+		do_echo_post(tcp, http, Config),
+		do_echo_post(tcp, http2, Config)
+	after
+		do_stop(echo_post)
+	end.
+
+do_echo_post(Transport, Protocol, Config) ->
+	ConnPid = gun_open([{port, 8080}, {type, Transport}, {protocol, Protocol}|Config]),
+	Ref = gun:post(ConnPid, "/", [
+		{<<"content-type">>, <<"application/octet-stream">>}
+	], <<"echo=this+is+fun">>),
+	{response, nofin, 200, _} = gun:await(ConnPid, Ref),
+	{ok, <<"this is fun">>} = gun:await_body(ConnPid, Ref),
+	ok.