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azureblob: Enable MD5 checksums when uploading files bigger than the "Cutoff" 

This enables MD5 checksum calculation and publication when uploading file above the "Cutoff" limit.
It was explictely ignored in case of multi-block (a.k.a. multipart) uploads to Azure Blob Storage.
s3-about
Dr.Rx 2019-02-28 16:31:07 -05:00 committed by Nick Craig-Wood
parent b353c730d8
commit 0ea3a57ecb
1 changed files with 10 additions and 10 deletions
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20
backend/azureblob/azureblob.go
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@ -1386,16 +1386,16 @@ func (o *Object) Update(in io.Reader, src fs.ObjectInfo, options ...fs.OpenOptio
blob := o.getBlobReference()
httpHeaders := azblob.BlobHTTPHeaders{}
httpHeaders.ContentType = fs.MimeType(o)
// Multipart upload doesn't support MD5 checksums at put block calls, hence calculate
// MD5 only for PutBlob requests
if size < int64(o.fs.opt.UploadCutoff) {
if sourceMD5, _ := src.Hash(hash.MD5); sourceMD5 != "" {
sourceMD5bytes, err := hex.DecodeString(sourceMD5)
if err == nil {
httpHeaders.ContentMD5 = sourceMD5bytes
} else {
fs.Debugf(o, "Failed to decode %q as MD5: %v", sourceMD5, err)
}
// Compute the Content-MD5 of the file, for multiparts uploads it
// will be set in PutBlockList API call using the 'x-ms-blob-content-md5' header
// Note: If multipart, a MD5 checksum will also be computed for each uploaded block
// in order to validate its integrity during transport
if sourceMD5, _ := src.Hash(hash.MD5); sourceMD5 != "" {
sourceMD5bytes, err := hex.DecodeString(sourceMD5)
if err == nil {
httpHeaders.ContentMD5 = sourceMD5bytes
} else {
fs.Debugf(o, "Failed to decode %q as MD5: %v", sourceMD5, err)
}
}