Merge pull request #72575 from liggitt/flush-streamer-headers

Flush headers before streaming logs

Merge pull request #72575 from liggitt/flush-streamer-headers
080d2a43 · Kubernetes Prow Robot · GitHub · d3aa7b2c · 93625f50 · 080d2a43
Unverified Commit 080d2a43 authored Jan 04, 2019 by Kubernetes Prow Robot Committed by GitHub Jan 04, 2019
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writers.go ...iserver/pkg/endpoints/handlers/responsewriters/writers.go +4 -0

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--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
@@ -101,6 +101,10 @@ func StreamObject(statusCode int, gv schema.GroupVersion, s runtime.NegotiatedSe
 	}
 	w.Header().Set("Content-Type", contentType)
 	w.WriteHeader(statusCode)
+	// Flush headers, if possible
+	if flusher, ok := w.(http.Flusher); ok {
+		flusher.Flush()
+	}
 	writer := w.(io.Writer)
 	if flush {
 		writer = flushwriter.Wrap(w)