45 lines
1 KiB
Go
45 lines
1 KiB
Go
package storage
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import (
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"net/http"
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"time"
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"github.com/docker/distribution"
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"github.com/docker/distribution/digest"
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)
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// layerReader implements Layer and provides facilities for reading and
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// seeking.
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type layerReader struct {
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fileReader
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digest digest.Digest
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}
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var _ distribution.Layer = &layerReader{}
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func (lr *layerReader) Digest() digest.Digest {
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return lr.digest
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}
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func (lr *layerReader) Length() int64 {
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return lr.size
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}
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func (lr *layerReader) CreatedAt() time.Time {
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return lr.modtime
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}
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// Close the layer. Should be called when the resource is no longer needed.
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func (lr *layerReader) Close() error {
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return lr.closeWithErr(distribution.ErrLayerClosed)
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}
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func (lr *layerReader) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Docker-Content-Digest", lr.digest.String())
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if url, err := lr.fileReader.driver.URLFor(lr.path, map[string]interface{}{}); err == nil {
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http.Redirect(w, r, url, http.StatusTemporaryRedirect)
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}
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http.ServeContent(w, r, lr.digest.String(), lr.CreatedAt(), lr)
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}
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