Pass on authenticated user via X-Forwarded-User header

Fixes #13

example/traefik.toml

@@ -37,7 +37,8 @@
     address = ":80"
 
     [entryPoints.http.auth.forward]
-    address = "http://forward-oauth:4181"
+    address = "http://traefik-forward-auth:4181"
+    authResponseHeaders = ["X-Forwarded-User"]
 
 ################################################################
 # Traefik logs configuration

main.go

@@ -70,6 +70,7 @@ func handler(w http.ResponseWriter, r *http.Request) {
   }
 
   // Valid request
+  w.Header().Set("X-Forwarded-User", email)
   w.WriteHeader(200)
 }
 

main_test.go

@@ -15,6 +15,9 @@ import (
   "github.com/op/go-logging"
 )
 
+/**
+ * Utilities
+ */
 
 type TokenServerHandler struct {}
 func (t *TokenServerHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
@@ -79,6 +82,10 @@ func qsDiff(one, two url.Values) {
   }
 }
 
+/**
+ * Tests
+ */
+
 func TestHandler(t *testing.T) {
   fw = &ForwardAuth{
     Path: "_oauth",
@@ -138,6 +145,14 @@ func TestHandler(t *testing.T) {
   if res.StatusCode != 200 {
     t.Error("Valid request should be allowed, got:", res.StatusCode)
   }
+
+  // Should pass through user
+  users := res.Header["X-Forwarded-User"];
+  if len(users) != 1 {
+    t.Error("Valid request missing X-Forwarded-User header")
+  } else if users[0] != "test@example.com" {
+    t.Error("X-Forwarded-User should match user, got: ", users)
+  }
 }
 
 func TestCallback(t *testing.T) {