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Fix MimeType propagation

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In fs.Copy, don't wrap objects if possible, and if not, then add a
MimeType method into the wrapped object.
This commit is contained in:
Nick Craig-Wood 2017-03-04 10:10:55 +00:00
parent 1cc58e4e09
commit 4ab7e05e02
1 changed files with 18 additions and 3 deletions
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21
fs/operations.go
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@ -211,7 +211,7 @@ func MimeType(o ObjectInfo) (mimeType string) {
// Read the MimeType from the optional interface if available
if do, ok := o.(MimeTyper); ok {
mimeType = do.MimeType()
Debugf(o, "Read MimeType as %q", mimeType)
// Debugf(o, "Read MimeType as %q", mimeType)
if mimeType != "" {
return mimeType
}
@ -246,6 +246,18 @@ func (o *overrideRemoteObject) Remote() string {
return o.remote
}
// MimeType returns the mime type of the underlying object or "" if it
// can't be worked out
func (o *overrideRemoteObject) MimeType() string {
if do, ok := o.Object.(MimeTyper); ok {
return do.MimeType()
}
return ""
}
// Check interface is satisfied
var _ MimeTyper = (*overrideRemoteObject)(nil)
// Copy src object to dst or f if nil. If dst is nil then it uses
// remote as the name of the new object.
func Copy(f Fs, dst Object, remote string, src Object) (err error) {
@ -278,8 +290,11 @@ func Copy(f Fs, dst Object, remote string, src Object) (err error) {
err = errors.Wrap(err, "failed to open source object")
} else {
in := NewAccount(in0, src).WithBuffer() // account and buffer the transfer
wrappedSrc := &overrideRemoteObject{Object: src, remote: remote}
var wrappedSrc ObjectInfo = src
// We try to pass the original object if possible
if src.Remote() != remote {
wrappedSrc = &overrideRemoteObject{Object: src, remote: remote}
}
if doUpdate {
actionTaken = "Copied (replaced existing)"
err = dst.Update(in, wrappedSrc)