大体参考的这里，非常感谢他的例子
开发的时候先下载好cowboy的库，放到~/.erlang里面
code:add_pathz("/Users/mmc/erlang/3rd_libs/cowboy/ebin/").
code:add_pathz("/Users/mmc/erlang/3rd_libs/cowboy/deps/ranch/ebin/").
code:add_pathz("/Users/mmc/erlang/3rd_libs/cowboy/deps/cowlib/ebin/").ranch和cowlib是rebar get-deps得到的
建立工程
rebar-creator create-app testCowboy
testCowboy_app.erl
-module(testCowboy_app).
-behaviour(application). -export([start/2, stop/1]). -define(C_ACCEPTORS, 100). start(_StartType, _StartArgs) ->
ok = application:start(crypto),
ok = application:start(cowlib),
ok = application:start(ranch),
ok = application:start(cowboy), Routes = route_helper:get_routes(),
Dispatch = cowboy_router:compile(Routes),
Port = get_port(),
TransOpts = [{port, Port}],
ProtoOpts = [{env, [{dispatch, Dispatch}]}],
cowboy:start_http(http, ?C_ACCEPTORS, TransOpts, ProtoOpts). stop(_State) ->
ok. get_port() ->
case os:getenv("PORT") of
false ->
{ok, Port} = application:get_env(http_port),
Port;
Other ->
list_to_integer(Other)
end.
path_helper.erl
-module(path_helper). -export([get_path/1]). get_path(ExtraPath)->
{ok,CurrentPath} = file:get_cwd(),
Path = string:concat(CurrentPath,"/"),
string:concat(Path,ExtraPath).
route_helper.erl
-module(route_helper). -export([get_routes/0]). get_routes() ->
StaticPath = path_helper:get_path("../static/"),
[
{'_', [
{"/", test_handler, []},
%相对静态文件的路径根据教程没成功，自己弄了个山寨版
{"/static/[...]", cowboy_static, {dir, StaticPath}}
]}
].
test_handler.erl
-module(test_handler). -export([init/3]).
-export([handle/2]).
-export([terminate/3]). init(_Transport, Req, []) ->
{ok, Req, undefined}. handle(Req, State) ->
{ok, Req2} = cowboy_req:reply(200, [], <<"Hello world!">>, Req),
{ok, Req2, State}. terminate(_Reason, _Req, _State) ->
ok.
testCowboy.app.src
{application, testCowboy,
[
{description, ""},
{vsn, ""},
{registered, []},
{applications, [
kernel,
stdlib
]},
{mod, { testCowboy_app, []}},
{env, [{http_port, }]}
]}.启动
application:start(testCowboy).
看看加载了哪些application
application:which_applications().
本地访问试试