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[plugin/cache] create a copy of a response to ensure original data is never modified (#7357)

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Signed-off-by: Oleg Guba <oleg.guba@gmail.com>
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Oleg Guba
2025-06-06 05:14:41 -07:00
committed by GitHub
parent 6cba588951
commit 27273a3a26
1 changed files with 1 additions and 0 deletions
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plugin/cache/cache.go vendored
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@@ -182,6 +182,7 @@ func (w *ResponseWriter) RemoteAddr() net.Addr {
// WriteMsg implements the dns.ResponseWriter interface. // WriteMsg implements the dns.ResponseWriter interface.
func (w *ResponseWriter) WriteMsg(res *dns.Msg) error { func (w *ResponseWriter) WriteMsg(res *dns.Msg) error {
res = res.Copy()
mt, _ := response.Typify(res, w.now().UTC()) mt, _ := response.Typify(res, w.now().UTC())
// key returns empty string for anything we don't want to cache. // key returns empty string for anything we don't want to cache.