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s3: Use streaming API and remove workarounds
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parent
68a91d66b7
commit
89ace85903
@ -4,6 +4,7 @@ import (
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"context"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"path"
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"restic"
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@ -197,53 +198,6 @@ func (be *Backend) Path() string {
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return be.cfg.Prefix
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}
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// nopCloserFile wraps *os.File and overwrites the Close() method with method
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// that does nothing. In addition, the method Len() is implemented, which
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// returns the size of the file (filesize - current offset).
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type nopCloserFile struct {
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*os.File
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}
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func (f nopCloserFile) Close() error {
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debug.Log("prevented Close()")
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return nil
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}
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// Len returns the remaining length of the file (filesize - current offset).
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func (f nopCloserFile) Len() int {
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debug.Log("Len() called")
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fi, err := f.Stat()
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if err != nil {
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panic(err)
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}
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pos, err := f.Seek(0, io.SeekCurrent)
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if err != nil {
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panic(err)
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}
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size := fi.Size() - pos
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debug.Log("returning file size %v", size)
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return int(size)
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}
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type lenner interface {
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Len() int
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io.Reader
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}
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// nopCloserLenner wraps a lenner and overwrites the Close() method with method
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// that does nothing. In addition, the method Size() is implemented, which
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// returns the size of the file (filesize - current offset).
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type nopCloserLenner struct {
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lenner
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}
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func (f *nopCloserLenner) Close() error {
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debug.Log("prevented Close()")
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return nil
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}
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// Save stores data in the backend at the handle.
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func (be *Backend) Save(ctx context.Context, h restic.Handle, rd io.Reader) (err error) {
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debug.Log("Save %v", h)
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@ -262,15 +216,7 @@ func (be *Backend) Save(ctx context.Context, h restic.Handle, rd io.Reader) (err
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}
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// prevent the HTTP client from closing a file
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if f, ok := rd.(*os.File); ok {
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debug.Log("reader is %#T, using nopCloserFile{}", rd)
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rd = nopCloserFile{f}
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} else if l, ok := rd.(lenner); ok {
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debug.Log("reader is %#T, using nopCloserLenner{}", rd)
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rd = nopCloserLenner{l}
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} else {
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debug.Log("reader is %#T, no specific workaround enabled", rd)
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}
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rd = ioutil.NopCloser(rd)
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be.sem.GetToken()
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debug.Log("PutObject(%v, %v)", be.cfg.Bucket, objName)
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