1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
%% Copyright (c) 2011-2013, Loïc Hoguin <[email protected]>
%%
%% Permission to use, copy, modify, and/or distribute this software for any
%% purpose with or without fee is hereby granted, provided that the above
%% copyright notice and this permission notice appear in all copies.
%%
%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
%% @doc Routing middleware.
%%
%% Resolve the handler to be used for the request based on the
%% routing information found in the <em>dispatch</em> environment value.
%% When found, the handler module and associated data are added to
%% the environment as the <em>handler</em> and <em>handler_opts</em> values
%% respectively.
%%
%% If the route cannot be found, processing stops with either
%% a 400 or a 404 reply.
%%
%% @see cowboy_dispatcher
-module(cowboy_router).
-behaviour(cowboy_middleware).
-export([execute/2]).
%% @private
-spec execute(Req, Env)
-> {ok, Req, Env} | {error, 400 | 404, Req}
when Req::cowboy_req:req(), Env::cowboy_middleware:env().
execute(Req, Env) ->
{_, Dispatch} = lists:keyfind(dispatch, 1, Env),
[Host, Path] = cowboy_req:get([host, path], Req),
case cowboy_dispatcher:match(Dispatch, Host, Path) of
{ok, Handler, HandlerOpts, Bindings, HostInfo, PathInfo} ->
Req2 = cowboy_req:set_bindings(HostInfo, PathInfo, Bindings, Req),
{ok, Req2, [{handler, Handler}, {handler_opts, HandlerOpts}|Env]};
{error, notfound, host} ->
{error, 400, Req};
{error, badrequest, path} ->
{error, 400, Req};
{error, notfound, path} ->
{error, 404, Req}
end.
|
