gotosocial/internal/api/security/useragentblock.go

/*
   GoToSocial
   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org

   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 security

import (
	"errors"
	"net/http"

	"github.com/gin-gonic/gin"
)

// UserAgentBlock aborts requests with empty user agent strings.
func (m *Module) UserAgentBlock(c *gin.Context) {
	if ua := c.Request.UserAgent(); ua == "" {
		code := http.StatusTeapot
		err := errors.New(http.StatusText(code) + ": no user-agent sent with request")
		c.AbortWithStatusJSON(code, gin.H{"error": err.Error()})
	}
}