From 86bb26326e0bcc09e058d56d67dd124c5e3ecee5 Mon Sep 17 00:00:00 2001
From: Adam Kocoloski <kocolosk@apache.org>
Date: Tue, 18 Aug 2009 19:47:41 +0000
Subject: cleanup application of auth functions

git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@805551 13f79535-47bb-0310-9956-ffa450edef68
---
 src/couchdb/couch_httpd.erl | 34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

(limited to 'src')

diff --git a/src/couchdb/couch_httpd.erl b/src/couchdb/couch_httpd.erl
index 61bdc177..8da157b3 100644
--- a/src/couchdb/couch_httpd.erl
+++ b/src/couchdb/couch_httpd.erl
@@ -173,20 +173,11 @@ handle_request(MochiReq, DefaultFun,
 
     {ok, Resp} =
     try
-        % Try authentication handlers in order until one returns a result
-        case lists:foldl(fun(_Fun, #httpd{user_ctx=#user_ctx{}}=Req) -> Req;
-                    (Fun, #httpd{}=Req) -> Fun(Req);
-                    (_Fun, Response) -> Response
-                end, HttpReq, AuthenticationFuns) of
-            #httpd{user_ctx=#user_ctx{}}=Req -> HandlerFun(Req);
-            #httpd{}=Req ->
-                case couch_config:get("couch_httpd_auth", "require_valid_user", "false") of
-                    "true" ->
-                        throw({unauthorized, <<"Authentication required.">>});
-                    _ ->
-                        HandlerFun(Req#httpd{user_ctx=#user_ctx{}})
-                end;
-            Response -> Response
+        case authenticate_request(HttpReq, AuthenticationFuns) of
+        Req when is_record(Req, httpd) ->
+            HandlerFun(Req);
+        Response ->
+            Response
         end
     catch
         throw:Error ->
@@ -218,6 +209,21 @@ handle_request(MochiReq, DefaultFun,
     couch_stats_collector:increment({httpd, requests}),
     {ok, Resp}.
 
+% Try authentication handlers in order until one returns a result
+authenticate_request(#httpd{user_ctx=#user_ctx{}} = Req, _AuthFuns) ->
+    Req;
+authenticate_request(#httpd{} = Req, []) ->
+    case couch_config:get("couch_httpd_auth", "require_valid_user", "false") of
+    "true" ->
+        throw({unauthorized, <<"Authentication required.">>});
+    "false" ->
+        Req#httpd{user_ctx=#user_ctx{}}
+    end;
+authenticate_request(#httpd{} = Req, [AuthFun|Rest]) ->
+    authenticate_request(AuthFun(Req), Rest);
+authenticate_request(Response, _AuthFuns) ->
+    Response.
+
 increment_method_stats(Method) ->
     couch_stats_collector:increment({httpd_request_methods, Method}).
 
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