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-rw-r--r--examples/error_hook/src/error_hook.app.src15
-rw-r--r--examples/error_hook/src/error_hook.erl14
-rw-r--r--examples/error_hook/src/error_hook_app.erl24
-rw-r--r--examples/error_hook/src/error_hook_responder.erl21
-rw-r--r--examples/error_hook/src/error_hook_sup.erl23
5 files changed, 97 insertions, 0 deletions
diff --git a/examples/error_hook/src/error_hook.app.src b/examples/error_hook/src/error_hook.app.src
new file mode 100644
index 0000000..80a1f2b
--- /dev/null
+++ b/examples/error_hook/src/error_hook.app.src
@@ -0,0 +1,15 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+{application, error_hook, [
+ {description, "Cowboy error handler example."},
+ {vsn, "1"},
+ {modules, []},
+ {registered, []},
+ {applications, [
+ kernel,
+ stdlib,
+ cowboy
+ ]},
+ {mod, {error_hook_app, []}},
+ {env, []}
+]}.
diff --git a/examples/error_hook/src/error_hook.erl b/examples/error_hook/src/error_hook.erl
new file mode 100644
index 0000000..3543590
--- /dev/null
+++ b/examples/error_hook/src/error_hook.erl
@@ -0,0 +1,14 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+-module(error_hook).
+
+%% API.
+-export([start/0]).
+
+%% API.
+
+start() ->
+ ok = application:start(crypto),
+ ok = application:start(ranch),
+ ok = application:start(cowboy),
+ ok = application:start(error_hook).
diff --git a/examples/error_hook/src/error_hook_app.erl b/examples/error_hook/src/error_hook_app.erl
new file mode 100644
index 0000000..213eccf
--- /dev/null
+++ b/examples/error_hook/src/error_hook_app.erl
@@ -0,0 +1,24 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(error_hook_app).
+-behaviour(application).
+
+%% API.
+-export([start/2]).
+-export([stop/1]).
+
+%% API.
+
+start(_Type, _Args) ->
+ Dispatch = cowboy_router:compile([
+ {'_', []}
+ ]),
+ {ok, _} = cowboy:start_http(http, 100, [{port, 8080}], [
+ {env, [{dispatch, Dispatch}]},
+ {onresponse, fun error_hook_responder:respond/4}
+ ]),
+ error_hook_sup:start_link().
+
+stop(_State) ->
+ ok.
diff --git a/examples/error_hook/src/error_hook_responder.erl b/examples/error_hook/src/error_hook_responder.erl
new file mode 100644
index 0000000..31f2d5b
--- /dev/null
+++ b/examples/error_hook/src/error_hook_responder.erl
@@ -0,0 +1,21 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+-module(error_hook_responder).
+
+-export([respond/4]).
+
+respond(404, Headers, <<>>, Req) ->
+ {Path, Req2} = cowboy_req:path(Req),
+ Body = <<"404 Not Found: \"", Path/binary, "\" is not the path you are looking for.\n">>,
+ Headers2 = lists:keyreplace(<<"content-length">>, 1, Headers,
+ {<<"content-length">>, integer_to_list(byte_size(Body))}),
+ {ok, Req3} = cowboy_req:reply(404, Headers2, Body, Req2),
+ Req3;
+respond(Code, Headers, <<>>, Req) when is_integer(Code), Code >= 400 ->
+ Body = ["HTTP Error ", integer_to_list(Code), $\n],
+ Headers2 = lists:keyreplace(<<"content-length">>, 1, Headers,
+ {<<"content-length">>, integer_to_list(iolist_size(Body))}),
+ {ok, Req2} = cowboy_req:reply(Code, Headers2, Body, Req),
+ Req2;
+respond(_Code, _Headers, _Body, Req) ->
+ Req.
diff --git a/examples/error_hook/src/error_hook_sup.erl b/examples/error_hook/src/error_hook_sup.erl
new file mode 100644
index 0000000..f92c156
--- /dev/null
+++ b/examples/error_hook/src/error_hook_sup.erl
@@ -0,0 +1,23 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @private
+-module(error_hook_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}}.