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cowboy简介

• Webmachine-based REST:

  Dispatch = cowboy_router:compile([
      %% {URIHost, list({URIPath, Handler, Opts})}
      {'_', [{'_', my_handler, []}]}
  ]),
  %% Name, NbAcceptors, TransOpts, ProtoOpts
  cowboy:start_http(my_http_listener, 100,
      [{port, 8080}],
      [{env, [{dispatch, Dispatch}]}]
  ).
  

handler types:

cowboy_rest
cowboy_websocket
cowboy_loop

// 方法
init(Req, State) ->
  {cowboy_websocket, Req, State}.

mimetype:

{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
  [{mimetypes, cow_mimetypes, web}]}}

{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
  [{mimetypes, cow_mimetypes, all}]}}

{"/assets/[...]", cowboy_static, {priv_dir, my_app, "static/assets",
  [{mimetypes, Module, Function}]}}

{"/", cowboy_static, {priv_file, my_app, "static/index.html",
  [{mimetypes, {<<"text">>, <<"html">>, []}}]}}

普通实例:

-module(my_handler).
-behaviour(cowboy_http_handler).

-export([init/3]).
-export([handle/2]).
-export([terminate/3]).

init({tcp, http}, Req, Opts) ->
    {ok, Req, undefined_state}.

handle(Req, State) ->
    {ok, Req2} = cowboy_req:reply(200, [], <<"Hello World!">>, Req),
    {ok, Req2, State}.

terminate(Reason, Req, State) ->
    ok.

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