mirror of https://github.com/containers/podman.git
80 lines
1.3 KiB
Go
80 lines
1.3 KiB
Go
package mpb
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import (
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"io"
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"time"
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)
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type proxyReader struct {
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io.ReadCloser
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bar *Bar
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}
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func (x proxyReader) Read(p []byte) (int, error) {
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n, err := x.ReadCloser.Read(p)
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x.bar.IncrBy(n)
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return n, err
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}
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type proxyWriterTo struct {
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proxyReader
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wt io.WriterTo
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}
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func (x proxyWriterTo) WriteTo(w io.Writer) (int64, error) {
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n, err := x.wt.WriteTo(w)
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x.bar.IncrInt64(n)
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return n, err
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}
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type ewmaProxyReader struct {
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proxyReader
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}
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func (x ewmaProxyReader) Read(p []byte) (int, error) {
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start := time.Now()
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n, err := x.proxyReader.Read(p)
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if n > 0 {
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x.bar.DecoratorEwmaUpdate(time.Since(start))
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}
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return n, err
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}
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type ewmaProxyWriterTo struct {
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ewmaProxyReader
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wt proxyWriterTo
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}
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func (x ewmaProxyWriterTo) WriteTo(w io.Writer) (int64, error) {
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start := time.Now()
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n, err := x.wt.WriteTo(w)
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if n > 0 {
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x.bar.DecoratorEwmaUpdate(time.Since(start))
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}
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return n, err
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}
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func (b *Bar) newProxyReader(r io.Reader) (rc io.ReadCloser) {
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pr := proxyReader{toReadCloser(r), b}
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if wt, ok := r.(io.WriterTo); ok {
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pw := proxyWriterTo{pr, wt}
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if b.hasEwma {
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rc = ewmaProxyWriterTo{ewmaProxyReader{pr}, pw}
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} else {
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rc = pw
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}
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} else if b.hasEwma {
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rc = ewmaProxyReader{pr}
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} else {
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rc = pr
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}
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return rc
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}
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func toReadCloser(r io.Reader) io.ReadCloser {
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if rc, ok := r.(io.ReadCloser); ok {
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return rc
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}
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return io.NopCloser(r)
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}
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