mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-24 22:10:23 +00:00
54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
|
/*
|
||
|
|
Copyright 2014 The Kubernetes Authors.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package flushwriter
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"net/http"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Wrap wraps an io.Writer into a writer that flushes after every write if
|
||
|
|
// the writer implements the Flusher interface.
|
||
|
|
func Wrap(w io.Writer) io.Writer {
|
||
|
|
fw := &flushWriter{
|
||
|
|
writer: w,
|
||
|
|
}
|
||
|
|
if flusher, ok := w.(http.Flusher); ok {
|
||
|
|
fw.flusher = flusher
|
||
|
|
}
|
||
|
|
return fw
|
||
|
|
}
|
||
|
|
|
||
|
|
// flushWriter provides wrapper for responseWriter with HTTP streaming capabilities
|
||
|
|
type flushWriter struct {
|
||
|
|
flusher http.Flusher
|
||
|
|
writer io.Writer
|
||
|
|
}
|
||
|
|
|
||
|
|
// Write is a FlushWriter implementation of the io.Writer that sends any buffered
|
||
|
|
// data to the client.
|
||
|
|
func (fw *flushWriter) Write(p []byte) (n int, err error) {
|
||
|
|
n, err = fw.writer.Write(p)
|
||
|
|
if err != nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
if fw.flusher != nil {
|
||
|
|
fw.flusher.Flush()
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|