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azureblob: add --azureblob-disable-checksum flag

This commit is contained in:
Nick Craig-Wood 2020-04-23 19:47:14 +01:00
parent b1d8da484b
commit ee7219aa20
1 changed files with 29 additions and 16 deletions
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45
backend/azureblob/azureblob.go
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@ -125,6 +125,16 @@ If blobs are in "archive tier" at remote, trying to perform data transfer
operations from remote will not be allowed. User should first restore by
tiering blob to "Hot" or "Cool".`,
Advanced: true,
}, {
Name: "disable_checksum",
Help: `Don't store MD5 checksum with object metadata.
Normally rclone will calculate the MD5 checksum of the input before
uploading it so it can add it to metadata on the object. This is great
for data integrity checking but can cause long delays for large files
to start uploading.`,
Default: false,
Advanced: true,
}, {
Name: config.ConfigEncoding,
Help: config.ConfigEncodingHelp,
@ -141,16 +151,17 @@ tiering blob to "Hot" or "Cool".`,
// Options defines the configuration for this backend
type Options struct {
Account string `config:"account"`
Key string `config:"key"`
Endpoint string `config:"endpoint"`
SASURL string `config:"sas_url"`
UploadCutoff fs.SizeSuffix `config:"upload_cutoff"`
ChunkSize fs.SizeSuffix `config:"chunk_size"`
ListChunkSize uint `config:"list_chunk"`
AccessTier string `config:"access_tier"`
UseEmulator bool `config:"use_emulator"`
Enc encoder.MultiEncoder `config:"encoding"`
Account string `config:"account"`
Key string `config:"key"`
Endpoint string `config:"endpoint"`
SASURL string `config:"sas_url"`
UploadCutoff fs.SizeSuffix `config:"upload_cutoff"`
ChunkSize fs.SizeSuffix `config:"chunk_size"`
ListChunkSize uint `config:"list_chunk"`
AccessTier string `config:"access_tier"`
UseEmulator bool `config:"use_emulator"`
DisableCheckSum bool `config:"disable_checksum"`
Enc encoder.MultiEncoder `config:"encoding"`
}
// Fs represents a remote azure server
@ -1395,12 +1406,14 @@ func (o *Object) Update(ctx context.Context, in io.Reader, src fs.ObjectInfo, op
// 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(ctx, 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)
if !o.fs.opt.DisableCheckSum {
if sourceMD5, _ := src.Hash(ctx, 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)
}
}
}