Add internal routes for ssh hook comands (#1471)

* add internal routes for ssh hook comands

* fix lint

* add comment on why package named private not internal but the route name is internal

* add comment above package private why package named private not internal but the route name is internal

* remove exp time on internal access

* move routes from /internal to /api/internal

* add comment and defer on UpdatePublicKeyUpdated

routers/private/internal.go

@@ -0,0 +1,44 @@
+// Copyright 2017 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 private includes all internal routes. The package name internal is ideal but Golang is not allowed, so we use private as package name instead.
+package private
+
+import (
+	"strings"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/setting"
+	macaron "gopkg.in/macaron.v1"
+)
+
+// CheckInternalToken check internal token is set
+func CheckInternalToken(ctx *macaron.Context) {
+	tokens := ctx.Req.Header.Get("Authorization")
+	fields := strings.Fields(tokens)
+	if len(fields) != 2 || fields[0] != "Bearer" || fields[1] != setting.InternalToken {
+		ctx.Error(403)
+	}
+}
+
+// UpdatePublicKey update publick key updates
+func UpdatePublicKey(ctx *macaron.Context) {
+	keyID := ctx.ParamsInt64(":id")
+	if err := models.UpdatePublicKeyUpdated(keyID); err != nil {
+		ctx.JSON(500, map[string]interface{}{
+			"err": err.Error(),
+		})
+		return
+	}
+
+	ctx.PlainText(200, []byte("success"))
+}
+
+// RegisterRoutes registers all internal APIs routes to web application.
+// These APIs will be invoked by internal commands for example `gitea serv` and etc.
+func RegisterRoutes(m *macaron.Macaron) {
+	m.Group("/", func() {
+		m.Post("/ssh/:id/update", UpdatePublicKey)
+	}, CheckInternalToken)
+}