Fix recovery middleware to render gitea style page. (#13857)

* Some changes to fix recovery

* Move Recovery to middlewares

* Remove trace code

* Fix lint

* add session middleware and remove dependent on macaron for sso

* Fix panic 500 page rendering

* Fix bugs

* Fix fmt

* Fix vendor

* recover unnecessary change

* Fix lint and addd some comments about the copied codes.

* Use util.StatDir instead of com.StatDir

Co-authored-by: 6543 <6543@obermui.de>

modules/auth/sso/user.go

@@ -0,0 +1,33 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package sso
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/models"
+)
+
+// SignedInUser returns the user object of signed user.
+// It returns a bool value to indicate whether user uses basic auth or not.
+func SignedInUser(req *http.Request, ds DataStore, sess SessionStore) (*models.User, bool) {
+	if !models.HasEngine {
+		return nil, false
+	}
+
+	// Try to sign in with each of the enabled plugins
+	for _, ssoMethod := range Methods() {
+		if !ssoMethod.IsEnabled() {
+			continue
+		}
+		user := ssoMethod.VerifyAuthData(req, ds, sess)
+		if user != nil {
+			_, isBasic := ssoMethod.(*Basic)
+			return user, isBasic
+		}
+	}
+
+	return nil, false
+}