[feature] request blocking by http headers (#2409)

internal/middleware/util.go

@@ -0,0 +1,51 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
+)
+
+// respondBlocked responds to the given gin context with
+// status forbidden, and a generic forbidden JSON response,
+// finally aborting the gin handler chain.
+func respondBlocked(c *gin.Context) {
+	apiutil.Data(c,
+		http.StatusForbidden,
+		apiutil.AppJSON,
+		apiutil.StatusForbiddenJSON,
+	)
+	c.Abort()
+}
+
+// respondInternalServerError responds to the given gin context
+// with status internal server error, a generic internal server
+// error JSON response, sets the given error on the gin context
+// for later logging, finally aborting the gin handler chain.
+func respondInternalServerError(c *gin.Context, err error) {
+	apiutil.Data(c,
+		http.StatusInternalServerError,
+		apiutil.AppJSON,
+		apiutil.StatusInternalServerErrorJSON,
+	)
+	_ = c.Error(err)
+	c.Abort()
+}