extraheaders.go (1532B)
1 // GoToSocial 2 // Copyright (C) GoToSocial Authors admin@gotosocial.org 3 // SPDX-License-Identifier: AGPL-3.0-or-later 4 // 5 // This program is free software: you can redistribute it and/or modify 6 // it under the terms of the GNU Affero General Public License as published by 7 // the Free Software Foundation, either version 3 of the License, or 8 // (at your option) any later version. 9 // 10 // This program is distributed in the hope that it will be useful, 11 // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 // GNU Affero General Public License for more details. 14 // 15 // You should have received a copy of the GNU Affero General Public License 16 // along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18 package middleware 19 20 import "github.com/gin-gonic/gin" 21 22 // ExtraHeaders returns a new gin middleware which adds various extra headers to the response. 23 func ExtraHeaders() gin.HandlerFunc { 24 return func(c *gin.Context) { 25 // Inform all callers which server implementation this is. 26 c.Header("Server", "gotosocial") 27 // Prevent google chrome cohort tracking. Originally this was referred 28 // to as FlocBlock. Floc was replaced by Topics in 2022 and the spec says 29 // that interest-cohort will also block Topics (as of 2022-Nov). 30 // 31 // See: https://smartframe.io/blog/google-topics-api-everything-you-need-to-know 32 // 33 // See: https://github.com/patcg-individual-drafts/topics 34 c.Header("Permissions-Policy", "browsing-topics=()") 35 } 36 }