Round 3 - Add Register function

Signed-off-by: Doug Davis <dug@us.ibm.com>

docs/handlers/app.go

@@ -452,6 +452,7 @@ func (app *App) authorized(w http.ResponseWriter, r *http.Request, context *Cont
 	if err != nil {
 		switch err := err.(type) {
 		case auth.Challenge:
+			// NOTE(duglin):
 			// Since err.ServeHTTP will set the HTTP status code for us
 			// we need to set the content-type here.  The serveJSON
 			// func will try to do it but it'll be too late at that point.

docs/handlers/app_test.go

@@ -186,11 +186,9 @@ func TestNewApp(t *testing.T) {
 		t.Fatalf("unexpected status code during request: %v", err)
 	}
 
-	/*
-		if req.Header.Get("Content-Type") != "application/json; charset=utf-8" {
-			t.Fatalf("unexpected content-type: %v != %v", req.Header.Get("Content-Type"), "application/json; charset=utf-8")
-		}
-	*/
+	if req.Header.Get("Content-Type") != "application/json; charset=utf-8" {
+		t.Fatalf("unexpected content-type: %v != %v", req.Header.Get("Content-Type"), "application/json; charset=utf-8")
+	}
 
 	expectedAuthHeader := "Bearer realm=\"realm-test\",service=\"service-test\""
 	if e, a := expectedAuthHeader, req.Header.Get("WWW-Authenticate"); e != a {

docs/handlers/helpers.go

@@ -2,9 +2,10 @@ package handlers
 
 import (
 	"encoding/json"
-	"github.com/docker/distribution/registry/api/errcode"
 	"io"
 	"net/http"
+
+	"github.com/docker/distribution/registry/api/errcode"
 )
 
 // serveJSON marshals v and sets the content-type header to