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authorLoïc Hoguin <[email protected]>2012-07-21 22:19:13 +0200
committerLoïc Hoguin <[email protected]>2012-07-22 05:09:56 +0200
commit73c07376bb1371afd3a10c4dc135912cfe16a247 (patch)
treebcd4a9ec4e6582f71df33741a7ba2fa298768941 /examples/echo_post/src
parent370b3d96485daa2bac0ed4aebecb867dca5f8d3e (diff)
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Add a POST echo example
Diffstat (limited to 'examples/echo_post/src')
-rw-r--r--examples/echo_post/src/echo_post.app.src15
-rw-r--r--examples/echo_post/src/echo_post.erl12
-rw-r--r--examples/echo_post/src/echo_post_app.erl26
-rw-r--r--examples/echo_post/src/echo_post_sup.erl23
-rw-r--r--examples/echo_post/src/toppage_handler.erl36
5 files changed, 112 insertions, 0 deletions
diff --git a/examples/echo_post/src/echo_post.app.src b/examples/echo_post/src/echo_post.app.src
new file mode 100644
index 0000000..74ff7f3
--- /dev/null
+++ b/examples/echo_post/src/echo_post.app.src
@@ -0,0 +1,15 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+{application, echo_post, [
+ {description, "Cowboy POST echo example."},
+ {vsn, "1"},
+ {modules, []},
+ {registered, []},
+ {applications, [
+ kernel,
+ stdlib,
+ cowboy
+ ]},
+ {mod, {echo_post_app, []}},
+ {env, []}
+]}.
diff --git a/examples/echo_post/src/echo_post.erl b/examples/echo_post/src/echo_post.erl
new file mode 100644
index 0000000..0073a80
--- /dev/null
+++ b/examples/echo_post/src/echo_post.erl
@@ -0,0 +1,12 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+-module(echo_post).
+
+%% API.
+-export([start/0]).
+
+%% API.
+
+start() ->
+ ok = application:start(cowboy),
+ ok = application:start(echo_post).
diff --git a/examples/echo_post/src/echo_post_app.erl b/examples/echo_post/src/echo_post_app.erl
new file mode 100644
index 0000000..bb74d4a
--- /dev/null
+++ b/examples/echo_post/src/echo_post_app.erl
@@ -0,0 +1,26 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(echo_post_app).
+-behaviour(application).
+
+%% API.
+-export([start/2]).
+-export([stop/1]).
+
+%% API.
+
+start(_Type, _Args) ->
+ Dispatch = [
+ {'_', [
+ {[], toppage_handler, []}
+ ]}
+ ],
+ {ok, _} = cowboy:start_listener(http, 100,
+ cowboy_tcp_transport, [{port, 8080}],
+ cowboy_http_protocol, [{dispatch, Dispatch}]
+ ),
+ echo_post_sup:start_link().
+
+stop(_State) ->
+ ok.
diff --git a/examples/echo_post/src/echo_post_sup.erl b/examples/echo_post/src/echo_post_sup.erl
new file mode 100644
index 0000000..6f973c0
--- /dev/null
+++ b/examples/echo_post/src/echo_post_sup.erl
@@ -0,0 +1,23 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(echo_post_sup).
+-behaviour(supervisor).
+
+%% API.
+-export([start_link/0]).
+
+%% supervisor.
+-export([init/1]).
+
+%% API.
+
+-spec start_link() -> {ok, pid()}.
+start_link() ->
+ supervisor:start_link({local, ?MODULE}, ?MODULE, []).
+
+%% supervisor.
+
+init([]) ->
+ Procs = [],
+ {ok, {{one_for_one, 10, 10}, Procs}}.
diff --git a/examples/echo_post/src/toppage_handler.erl b/examples/echo_post/src/toppage_handler.erl
new file mode 100644
index 0000000..aed26e6
--- /dev/null
+++ b/examples/echo_post/src/toppage_handler.erl
@@ -0,0 +1,36 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @doc POST echo handler.
+-module(toppage_handler).
+
+-export([init/3]).
+-export([handle/2]).
+-export([terminate/2]).
+
+init(_Transport, Req, []) ->
+ {ok, Req, undefined}.
+
+handle(Req, State) ->
+ {Method, Req2} = cowboy_http_req:method(Req),
+ {HasBody, Req3} = cowboy_http_req:has_body(Req2),
+ {ok, Req4} = maybe_echo(Method, HasBody, Req3),
+ {ok, Req4, State}.
+
+maybe_echo('POST', true, Req) ->
+ {PostVals, Req2} = cowboy_http_req:body_qs(Req),
+ Echo = proplists:get_value(<<"echo">>, PostVals),
+ echo(Echo, Req2);
+maybe_echo('POST', false, Req) ->
+ cowboy_http_req:reply(400, [], <<"Missing body.">>, Req);
+maybe_echo(_, _, Req) ->
+ %% Method not allowed.
+ cowboy_http_req:reply(405, Req).
+
+echo(undefined, Req) ->
+ cowboy_http_req:reply(400, [], <<"Missing echo parameter.">>, Req);
+echo(Echo, Req) ->
+ cowboy_http_req:reply(200,
+ [{<<"Content-Encoding">>, <<"utf-8">>}], Echo, Req).
+
+terminate(_Req, _State) ->
+ ok.