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serve webdav: fix incorrect Content-Type immediately after upload

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Before this change, if the Content-Type for an object was read
immediately after upload (before the object had been uploaded to the
backing store) then the Content-Type would be returned incorrectly.

This error would be more likely with `--vfs-cache-mode full` and
`writes` but may have been possible with the other
`--vfs-cache-mode`s.

This fixes the problem by always returning a sensible guess at the
content type - the same guess we would use for uploading the object.

Fixes #6433
This commit is contained in:
Nick Craig-Wood 2022-09-12 12:37:47 +01:00
parent be53dcc9c9
commit f4d822626e
1 changed files with 15 additions and 12 deletions
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27
cmd/serve/webdav/webdav.go
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@ -377,18 +377,21 @@ func (fi FileInfo) ETag(ctx context.Context) (etag string, err error) {
// ContentType returns a content type for the FileInfo
func (fi FileInfo) ContentType(ctx context.Context) (contentType string, err error) {
// defer log.Trace(fi, "")("etag=%q, err=%v", &contentType, &err)
node, ok := (fi.FileInfo).(vfs.Node)
if !ok {
fs.Errorf(fi, "Expecting vfs.Node, got %T", fi.FileInfo)
return "application/octet-stream", nil
}
entry := node.DirEntry()
switch x := entry.(type) {
case fs.Object:
return fs.MimeType(ctx, x), nil
case fs.Directory:
if fi.IsDir() {
return "inode/directory", nil
}
fs.Errorf(fi, "Expecting fs.Object or fs.Directory, got %T", entry)
return "application/octet-stream", nil
if node, ok := (fi.FileInfo).(vfs.Node); !ok {
fs.Errorf(fi, "Expecting vfs.Node, got %T", fi.FileInfo)
} else {
entry := node.DirEntry()
switch x := entry.(type) {
case nil:
// object hasn't been uploaded yet if entry is nil
case fs.Object:
return fs.MimeType(ctx, x), nil
default:
fs.Errorf(fi, "Expecting fs.Object or nil, got %T", entry)
}
}
return fs.MimeTypeFromName(fi.Name()), nil
}