Lahat ng language at framework
Cowboy Erlang
Isang Erlang snippet para sa Cowboy na sumasagot sa mga request sa /pixel.gif gamit ang empty GIF, na isang beses lang dine-decode sa startup.
Cowboy Erlang
-module(pixel_handler).
-behaviour(cowboy_handler).
-export([start/0, init/2]).
%% A binary literal is built once, at compile time.
-define(GIF, <<71, 73, 70, 56, 57, 97, 1, 0, 1, 0, 128, 0, 0, 255, 255, 255, 0, 0, 0, 33, 249, 4, 1, 0, 0, 0, 0, 44, 0, 0, 0, 0, 1, 0, 1, 0, 0, 2, 2, 68, 1, 0, 59>>).
%% Call from your application's start/2.
start() ->
Dispatch = cowboy_router:compile([{'_', [{"/pixel.gif", ?MODULE, []}]}]),
{ok, _} = cowboy:start_clear(pixel_http, [{port, 8080}],
#{env => #{dispatch => Dispatch}}).
init(Req0, State) ->
Req = cowboy_req:reply(200, #{
<<"content-type">> => <<"image/gif">>,
<<"cache-control">> => <<"no-store">>
}, ?GIF, Req0),
{ok, Req, State}.
Pinatakbo namin ang snippet na ito at ikinumpara ang mga byte na ibinalik nito.
Suriin
curl -sI http://localhost:8080/pixel.gif