feat: flush writes to http response on every chunk (#743)

Co-authored-by: Jorge Turrado <jorge.turrado@scrm.lidl>
kedacore · Oct 4, 2023 · 0a1d1de · 0a1d1de
1 parent 4670544
commit 0a1d1de
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -28,7 +28,8 @@ This changelog keeps track of work items that have been completed and are ready
 
 ### Fixes
 
-- **Interceptor**: fatal error: concurrent map iteration and map write ([#726](https://github.com/kedacore/http-add-on/issues/726))
+- **Interceptor**: Add support for streaming responses ([#743](https://github.com/kedacore/http-add-on/issues/743))
+- **Interceptor**: Fatal error: concurrent map iteration and map write ([#726](https://github.com/kedacore/http-add-on/issues/726))
 - **Interceptor**: Keep original Host in the Host header ([#331](https://github.com/kedacore/http-add-on/issues/331))
 - **Interceptor**: Provide graceful shutdown for http servers on SIGINT and SIGTERM ([#731](https://github.com/kedacore/http-add-on/issues/731))
 - **Operator**: Remove ScaledObject `name` & `app` custom labels ([#717](https://github.com/kedacore/http-add-on/issues/717))

diff --git a/interceptor/middleware/loggingresponsewriter.go b/interceptor/middleware/loggingresponsewriter.go
@@ -32,6 +32,9 @@ func (lrw *loggingResponseWriter) Header() http.Header {
 
 func (lrw *loggingResponseWriter) Write(bytes []byte) (int, error) {
 	n, err := lrw.downstreamResponseWriter.Write(bytes)
+	if f, ok := lrw.downstreamResponseWriter.(http.Flusher); ok {
+		f.Flush()
+	}
 
 	lrw.bytesWritten += n