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Don't panic when a http.ResponseWriter does not implement CloseNotifier

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Instead, provide a variant of instrumentedResponseWriter that does not
implement CloseNotifier, and use that when necessary. In
copyFullPayload, log instead of panicing when we encounter something
that doesn't implement CloseNotifier.

This is more complicated than I'd like, but it's necessary because
instrumentedResponseWriter must not embed CloseNotifier unless there's
really a CloseNotifier to embed.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2015-08-06 15:14:44 -07:00
parent 68c0706bac
commit e7435725af
1 changed files with 1 additions and 1 deletions
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2
docs/handlers/helpers.go
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@ -29,7 +29,7 @@ func copyFullPayload(responseWriter http.ResponseWriter, r *http.Request, destWr
if notifier, ok := responseWriter.(http.CloseNotifier); ok {
clientClosed = notifier.CloseNotify()
} else {
panic("the ResponseWriter does not implement CloseNotifier")
ctxu.GetLogger(context).Warn("the ResponseWriter does not implement CloseNotifier")
}
// Read in the data, if any.