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Merge pull request #634 from prometheus/beorn7/promhttp 

Add WriteHeader call to Flush
This commit is contained in:
Björn Rabenstein 2019-08-20 10:35:54 +02:00 committed by GitHub
parent 4efc3ccc7a ad58180fde
commit 35ef65db67
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 0 deletions
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9
prometheus/promhttp/delegator.go
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@ -62,6 +62,8 @@ func (r *responseWriterDelegator) WriteHeader(code int) {
}
func (r *responseWriterDelegator) Write(b []byte) (int, error) {
// If applicable, call WriteHeader here so that observeWriteHeader is
// handled appropriately.
if !r.wroteHeader {
r.WriteHeader(http.StatusOK)
}
@ -82,12 +84,19 @@ func (d closeNotifierDelegator) CloseNotify() <-chan bool {
return d.ResponseWriter.(http.CloseNotifier).CloseNotify()
}
func (d flusherDelegator) Flush() {
// If applicable, call WriteHeader here so that observeWriteHeader is
// handled appropriately.
if !d.wroteHeader {
d.WriteHeader(http.StatusOK)
}
d.ResponseWriter.(http.Flusher).Flush()
}
func (d hijackerDelegator) Hijack() (net.Conn, *bufio.ReadWriter, error) {
return d.ResponseWriter.(http.Hijacker).Hijack()
}
func (d readerFromDelegator) ReadFrom(re io.Reader) (int64, error) {
// If applicable, call WriteHeader here so that observeWriteHeader is
// handled appropriately.
if !d.wroteHeader {
d.WriteHeader(http.StatusOK)
}