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chunker: skip long local hashing, hash in-transit (fixes #4021)

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PR 4614
This commit is contained in:
Ivan Andreev 2020-05-18 18:07:53 +03:00
parent dad8447423
commit be6a888e50
1 changed files with 12 additions and 0 deletions
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12
backend/chunker/chunker.go
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@ -1130,6 +1130,12 @@ func (c *chunkingReader) wrapStream(ctx context.Context, in io.Reader, src fs.Ob
switch { switch {
case c.fs.useMD5: case c.fs.useMD5:
srcObj := fs.UnWrapObjectInfo(src)
if srcObj != nil && srcObj.Fs().Features().SlowHash {
fs.Debugf(src, "skip slow MD5 on source file, hashing in-transit")
c.hasher = md5.New()
break
}
if c.md5, _ = src.Hash(ctx, hash.MD5); c.md5 == "" { if c.md5, _ = src.Hash(ctx, hash.MD5); c.md5 == "" {
if c.fs.hashFallback { if c.fs.hashFallback {
c.sha1, _ = src.Hash(ctx, hash.SHA1) c.sha1, _ = src.Hash(ctx, hash.SHA1)
@ -1138,6 +1144,12 @@ func (c *chunkingReader) wrapStream(ctx context.Context, in io.Reader, src fs.Ob
} }
} }
case c.fs.useSHA1: case c.fs.useSHA1:
srcObj := fs.UnWrapObjectInfo(src)
if srcObj != nil && srcObj.Fs().Features().SlowHash {
fs.Debugf(src, "skip slow SHA1 on source file, hashing in-transit")
c.hasher = sha1.New()
break
}
if c.sha1, _ = src.Hash(ctx, hash.SHA1); c.sha1 == "" { if c.sha1, _ = src.Hash(ctx, hash.SHA1); c.sha1 == "" {
if c.fs.hashFallback { if c.fs.hashFallback {
c.md5, _ = src.Hash(ctx, hash.MD5) c.md5, _ = src.Hash(ctx, hash.MD5)