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reverseproxy: Fix hijack ordering which broke websockets (#5679)

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WeidiDeng 2023-08-03 12:08:12 +08:00 committed by GitHub
parent 4aa4f3ac70
commit e2fc08bd34
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 11 deletions
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23
modules/caddyhttp/reverseproxy/streaming.go
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@ -58,6 +58,13 @@ func (h *Handler) handleUpgradeResponse(logger *zap.Logger, rw http.ResponseWrit
return
}
// write header first, response headers should not be counted in size
// like the rest of handler chain.
copyHeader(rw.Header(), res.Header)
rw.WriteHeader(res.StatusCode)
logger.Debug("upgrading connection")
//nolint:bodyclose
conn, brw, hijackErr := http.NewResponseController(rw).Hijack()
if errors.Is(hijackErr, http.ErrNotSupported) {
@ -65,6 +72,11 @@ func (h *Handler) handleUpgradeResponse(logger *zap.Logger, rw http.ResponseWrit
return
}
if hijackErr != nil {
h.logger.Error("hijack failed on protocol switch", zap.Error(hijackErr))
return
}
// adopted from https://github.com/golang/go/commit/8bcf2834afdf6a1f7937390903a41518715ef6f5
backConnCloseCh := make(chan struct{})
go func() {
@ -78,17 +90,6 @@ func (h *Handler) handleUpgradeResponse(logger *zap.Logger, rw http.ResponseWrit
}()
defer close(backConnCloseCh)
// write header first, response headers should not be counted in size
// like the rest of handler chain.
copyHeader(rw.Header(), res.Header)
rw.WriteHeader(res.StatusCode)
logger.Debug("upgrading connection")
if hijackErr != nil {
h.logger.Error("hijack failed on protocol switch", zap.Error(hijackErr))
return
}
start := time.Now()
defer func() {
conn.Close()