mirror of
https://github.com/ceph/ceph-csi.git
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54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
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/*
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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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