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			37 lines
		
	
	
	
		
			1.5 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			37 lines
		
	
	
	
		
			1.5 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
/*
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   GoToSocial
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   Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
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   This program is free software: you can redistribute it and/or modify
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   it under the terms of the GNU Affero General Public License as published by
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   the Free Software Foundation, either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU Affero General Public License for more details.
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   You should have received a copy of the GNU Affero General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.
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*/
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package middleware
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import "github.com/gin-gonic/gin"
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// ExtraHeaders returns a new gin middleware which adds various extra headers to the response.
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func ExtraHeaders() gin.HandlerFunc {
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	return func(c *gin.Context) {
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		// Inform all callers which server implementation this is.
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		c.Header("Server", "gotosocial")
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		// Prevent google chrome cohort tracking. Originally this was referred
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		// to as FlocBlock. Floc was replaced by Topics in 2022 and the spec says
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		// that interest-cohort will also block Topics (as of 2022-Nov).
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		//
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		// See: https://smartframe.io/blog/google-topics-api-everything-you-need-to-know
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		//
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		// See: https://github.com/patcg-individual-drafts/topics
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		c.Header("Permissions-Policy", "browsing-topics=()")
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	}
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}
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