Abstract cookie handling.

dudeswave/src/dudeswave_auth.erl

@@ -25,7 +25,7 @@ from the dudeswave database.
 -include_lib("storage/include/storage.hrl").
 
 -export([authenticate/2, details/1, new/3,
-    update/4, delete/1, logout/2]).
+    update/4, delete/1, logout/2, auth_cookies/1]).
 
 -doc """
 Verify a session with an existing cookie.
@@ -242,3 +242,26 @@ delete(User) ->
 	% here. For that, we need to add at least another
 	% API to the storage layer.
 	storage:delete(?USERSBUCK, User).
+
+-doc """
+Get the authentication cookies from a cowboy request.
+
+Spec:
+
+```
+-spec auth_cookies(Req) -> {User, Cookie} when
+	Req :: cowboy_req:req(),
+	User :: binary(),
+	Cookie :: binary().
+```
+""".
+-spec auth_cookies(Req) -> {User, Cookie} when
+	Req :: cowboy_req:req(),
+	User :: binary(),
+	Cookie :: binary().
+
+auth_cookies(Req) ->
+	#{dudeauth := Cookie, dudename := User} = cowboy_req:match_cookies([dudeauth,
+	    dudename], Req),
+
+	{User, Cookie}.

dudeswave/src/dudeswave_user_handler.erl

@@ -145,8 +145,7 @@ forbidden(Req, State) ->
 		<<"PUT">> ->
 			{false, Req, State};
 		_ ->
-			#{dudeauth := Auth, dudename := User} = cowboy_req:match_cookies([dudeauth,
-			    dudename], Req),
+			{User, Auth} = dudeswave_auth:auth_cookies(Req),
 
 			case dudeswave_auth:authenticate(User, {cookie, Auth}) of
 				{error, service_unavailable} ->
@@ -178,7 +177,7 @@ content_types_accepted(Req, State) ->
 	end.
 
 resource_exists(Req, State) ->
-	#{dudename := User} = cowboy_req:match_cookies([dudename], Req),
+	{User, _} = dudeswave_auth:auth_cookies(Req),
 
 	case dudeswave_auth:details(User) of
 		[] -> {false, Req, State};
@@ -202,7 +201,7 @@ is_conflict(Req, State) -> {false, Req, State}.
 allow_missing_post(Req, State) -> {false, Req, State}.
 
 delete_resource(Req, State) ->
-	#{dudename := User} = cowboy_req:match_cookies([dudename], Req),
+	{User, _} = dudeswave_auth:auth_cookies(Req),
 
 	case dudeswave_auth:delete(User) of
 		ok -> {true, Req, State};
@@ -216,7 +215,7 @@ delete_completed(Req, State) -> {true, Req, State}.
 %
 
 create_user(Req, State) ->
-	#{dudename := User} = cowboy_req:match_cookies([dudename], Req),
+	{User, _} = dudeswave_auth:auth_cookies(Req),
 
 	{ok, Data, Req0} = cowboy_req:read_body(Req),
 	#{<<"password">> := Pass, <<"email">> := Email}  = json:decode(Data),
@@ -227,7 +226,7 @@ create_user(Req, State) ->
 	end.
 
 modify_user(Req, State) ->
-	#{dudename := User} = cowboy_req:match_cookies([dudename], Req),
+	{User, _} = dudeswave_auth:auth_cookies(Req),
 
 	{ok, Data, Req0} = cowboy_req:read_body(Req),
 	#{<<"email">> := Email, <<"description">> := Desc,
@@ -239,8 +238,8 @@ modify_user(Req, State) ->
 	end.
 
 user_details(Req, State) ->
+	{User, _} = dudeswave_auth:auth_cookies(Req),
 	#{details := Details} = State,
-	#{dudename := User} = cowboy_req:match_cookies([dudename], Req),
 	Data = Details#{user => User},
 
 	{iolist_to_binary(json:encode(Data)), Req, State}.