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reverseproxy: Remove redundant flushing (#4299) 

From reading through the code, I think this code path is now obsoleted by the changes made in https://github.com/caddyserver/caddy/pull/4266.

Basically, `h.flushInterval()` will set the flush interval to `-1` if we're in a bi-directional stream, and the recent PR ensured that `h.copyResponse()` properly flushes headers immediately when the flush interval is non-zero. So now there should be no need to call Flush before calling `h.copyResponse()`.
This commit is contained in:
Francis Lavoie 2021-08-23 13:54:28 -04:00 committed by GitHub
parent 51f125bd44
commit f70a7578fa
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1 changed files with 0 additions and 9 deletions
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9
modules/caddyhttp/reverseproxy/reverseproxy.go
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@ -691,15 +691,6 @@ func (h *Handler) reverseProxy(rw http.ResponseWriter, req *http.Request, repl *
}
rw.WriteHeader(res.StatusCode)
// some apps need the response headers before starting to stream content with http2,
// so it's important to explicitly flush the headers to the client before streaming the data.
// (see https://github.com/caddyserver/caddy/issues/3556 for use case and nuances)
if h.isBidirectionalStream(req, res) {
if wf, ok := rw.(http.Flusher); ok {
wf.Flush()
}
}
err = h.copyResponse(rw, res.Body, h.flushInterval(req, res))
res.Body.Close() // close now, instead of defer, to populate res.Trailer
if err != nil {