GoToSocial/internal/middleware/useragent.go

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// 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"
)
// UserAgent returns a gin middleware which aborts requests with
// empty user agent strings, returning code 418 - I'm a teapot.
func UserAgent() gin.HandlerFunc {
// todo: make this configurable
var rsp = []byte(`{"error": "I'm a teapot: no user-agent sent with request"}`)
return func(c *gin.Context) {
if ua := c.Request.UserAgent(); ua == "" {
apiutil.Data(c,
http.StatusTeapot, apiutil.AppJSON, rsp)
c.Abort()
}
}
}