add support for specific error response for InvalidRange (#19668)

fixes #19648

AWS S3 returns the actual object size as part of XML
response for InvalidRange error, this is used apparently
by SDKs to retry the request without the range.

cmd/erasure-object.go

@@ -251,6 +251,18 @@ func (er erasureObjects) GetObjectNInfo(ctx context.Context, bucket, object stri
 		opts.NoDecryption = true
 	}
 
+	if objInfo.Size == 0 {
+		if _, _, err := rs.GetOffsetLength(objInfo.Size); err != nil {
+			// Make sure to return object info to provide extra information.
+			return &GetObjectReader{
+				ObjInfo: objInfo,
+			}, err
+		}
+
+		// Zero byte objects don't even need to further initialize pipes etc.
+		return NewGetObjectReaderFromReader(bytes.NewReader(nil), objInfo, opts)
+	}
+
 	if objInfo.IsRemote() {
 		gr, err := getTransitionedObjectReader(ctx, bucket, object, rs, h, objInfo, opts)
 		if err != nil {
@@ -260,11 +272,6 @@ func (er erasureObjects) GetObjectNInfo(ctx context.Context, bucket, object stri
 		return gr.WithCleanupFuncs(nsUnlocker), nil
 	}
 
-	if objInfo.Size == 0 {
-		// Zero byte objects don't even need to further initialize pipes etc.
-		return NewGetObjectReaderFromReader(bytes.NewReader(nil), objInfo, opts)
-	}
-
 	fn, off, length, err := NewGetObjectReader(rs, objInfo, opts)
 	if err != nil {
 		return nil, err