8be340e37b
After some analysis, it was found that Content.Reader was generally redudant to an io.ReaderAt. This change removes `Content.Reader` in favor of a `Content.ReaderAt`. In general, `ReaderAt` can perform better over interfaces with indeterminant latency because it avoids remote state for reads. Where a reader is required, a helper is provided to convert it into an `io.SectionReader`. Signed-off-by: Stephen J Day <stephen.day@docker.com>
25 lines
441 B
Go
25 lines
441 B
Go
package local
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import (
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"os"
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)
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// readerat implements io.ReaderAt in a completely stateless manner by opening
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// the referenced file for each call to ReadAt.
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type sizeReaderAt struct {
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size int64
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fp *os.File
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}
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func (ra sizeReaderAt) ReadAt(p []byte, offset int64) (int, error) {
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return ra.fp.ReadAt(p, offset)
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}
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func (ra sizeReaderAt) Size() int64 {
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return ra.size
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}
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func (ra sizeReaderAt) Close() error {
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return ra.fp.Close()
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}
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