48 lines
1.4 KiB
Go
48 lines
1.4 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 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 security
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import (
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"net/http"
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"strings"
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"github.com/gin-gonic/gin"
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"github.com/sirupsen/logrus"
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)
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// UserAgentBlock blocks requests with undesired, empty, or invalid user-agent strings.
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func (m *Module) UserAgentBlock(c *gin.Context) {
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l := m.log.WithFields(logrus.Fields{
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"func": "UserAgentBlock",
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})
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ua := c.Request.UserAgent()
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if ua == "" {
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l.Debug("aborting request because there's no user-agent set")
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c.AbortWithStatus(http.StatusTeapot)
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return
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}
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if strings.Contains(strings.ToLower(ua), strings.ToLower("friendica")) {
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l.Debugf("aborting request with user-agent %s because it contains 'friendica'", ua)
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c.AbortWithStatus(http.StatusTeapot)
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return
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}
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}
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