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mailru: skip extra http request if data fits in hash

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Ivan Andreev 2019-09-10 21:16:35 +03:00 committed by Nick Craig-Wood
parent 8fb44a822d
commit 8fe87c8157
1 changed files with 19 additions and 14 deletions
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11
backend/mailru/mailru.go
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@ -1584,21 +1584,26 @@ func (o *Object) Update(ctx context.Context, in io.Reader, src fs.ObjectInfo, op
fileBuf []byte fileBuf []byte
fileHash []byte fileHash []byte
newHash []byte newHash []byte
trySpeedup bool
) )
// Request hash from source // Don't disturb the source if file fits in hash.
// Skip an extra speedup request if file fits in hash.
if size > mrhash.Size {
// Request hash from source.
if srcHash, err := src.Hash(ctx, hash.Mailru); err == nil && srcHash != "" { if srcHash, err := src.Hash(ctx, hash.Mailru); err == nil && srcHash != "" {
fileHash, _ = mrhash.DecodeString(srcHash) fileHash, _ = mrhash.DecodeString(srcHash)
} }
// Try speedup method if it's globally enabled and source hash is available // Try speedup if it's globally enabled and source hash is available.
trySpeedup := o.fs.opt.SpeedupEnable trySpeedup = o.fs.opt.SpeedupEnable
if trySpeedup && fileHash != nil { if trySpeedup && fileHash != nil {
if o.putByHash(ctx, fileHash, src, "source") { if o.putByHash(ctx, fileHash, src, "source") {
return nil return nil
} }
trySpeedup = false // speedup failed, force upload trySpeedup = false // speedup failed, force upload
} }
}
// Need to calculate hash, check whether file is still eligible for speedup // Need to calculate hash, check whether file is still eligible for speedup
if trySpeedup { if trySpeedup {