mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
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a293b2bf94
Travis seems to be having issues pulling deps, so we'll have to check in the vendor directory and prevent the makefile from trying to regenerate it normally.
53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package flushwriter
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import (
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"io"
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"net/http"
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)
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// Wrap wraps an io.Writer into a writer that flushes after every write if
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// the writer implements the Flusher interface.
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func Wrap(w io.Writer) io.Writer {
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fw := &flushWriter{
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writer: w,
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}
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if flusher, ok := w.(http.Flusher); ok {
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fw.flusher = flusher
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}
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return fw
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}
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// flushWriter provides wrapper for responseWriter with HTTP streaming capabilities
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type flushWriter struct {
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flusher http.Flusher
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writer io.Writer
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}
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// Write is a FlushWriter implementation of the io.Writer that sends any buffered
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// data to the client.
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func (fw *flushWriter) Write(p []byte) (n int, err error) {
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n, err = fw.writer.Write(p)
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if err != nil {
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return
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}
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if fw.flusher != nil {
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fw.flusher.Flush()
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}
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return
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}
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