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reverseproxy: handle buffered data during hijack (#6274)

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WeidiDeng 2024-04-26 23:09:18 +08:00 committed by GitHub
parent 4d6370bf92
commit 1b9042bcdd
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2 changed files with 13 additions and 0 deletions
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2
modules/caddyhttp/responsewriter.go
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@ -263,6 +263,8 @@ func (rr *responseRecorder) Hijack() (net.Conn, *bufio.ReadWriter, error) {
conn.(*hijackedConn).updateReadSize(buffered) conn.(*hijackedConn).updateReadSize(buffered)
data, _ := brw.Peek(buffered) data, _ := brw.Peek(buffered)
brw.Reader.Reset(io.MultiReader(bytes.NewReader(data), conn)) brw.Reader.Reset(io.MultiReader(bytes.NewReader(data), conn))
// peek to make buffered data appear, as Reset will make it 0
_, _ = brw.Peek(buffered)
} else { } else {
brw.Reader.Reset(conn) brw.Reader.Reset(conn)
} }

11
modules/caddyhttp/reverseproxy/streaming.go
View file

@ -101,6 +101,17 @@ func (h *Handler) handleUpgradeResponse(logger *zap.Logger, wg *sync.WaitGroup,
return return
} }
// There may be buffered data in the *bufio.Reader
// see: https://github.com/caddyserver/caddy/issues/6273
if buffered := brw.Reader.Buffered(); buffered > 0 {
data, _ := brw.Peek(buffered)
_, err := backConn.Write(data)
if err != nil {
logger.Debug("backConn write failed", zap.Error(err))
return
}
}
// Ensure the hijacked client connection, and the new connection established // Ensure the hijacked client connection, and the new connection established
// with the backend, are both closed in the event of a server shutdown. This // with the backend, are both closed in the event of a server shutdown. This
// is done by registering them. We also try to gracefully close connections // is done by registering them. We also try to gracefully close connections