ERROR : : Entry doesn't belong in directory "" (same as directory)

Help and Support
1

What is the problem you are having with rclone?

I am the maintainer of https://r-universe.dev and I am trying to support a very basic S3 compatible API to let users easily mirror their files. It is read-only and there is no authentication needed, it is really just the bare minimal list and download.

I have implemented ListObjectsV2 for example: https://jeroen.r-universe.dev/?list-type=2

From trial and error I found that rcloud also needs: https://jeroen.r-universe.dev/?x-id=ListBuckets but I am not sure why this is and if I implemented it correctly. I have simply a single bucket per subdomain on the root path.

A simple ls and also lsl seems to work:

rclone ls :s3,provider=Other,list_version=2,endpoint=jeroen.r-universe.dev:

However if I try to rclone lsd or copy we get:

rclone lsd :s3,provider=Other,list_version=2,endpoint=jeroen.r-universe.dev:
# 2025/03/08 14:31:38 ERROR : : Entry doesn't belong in directory "" (same as directory) - ignoring

My API must be doing something wrong but I can't figure out what it is.

Run the command 'rclone version' and share the full output of the command.

rclone version
rclone v1.69.1
- os/version: darwin 15.3.1 (64 bit)
- os/kernel: 24.3.0 (arm64)
- os/type: darwin
- os/arch: arm64 (ARMv8 compatible)
- go/version: go1.24.0
- go/linking: dynamic
- go/tags: none

Which cloud storage system are you using? (eg Google Drive)

My own, I am trying to implement a minimal S3 compatible API.

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone lsd :s3,provider=Cloudflare,endpoint=jeroen.r-universe.dev:

Please run 'rclone config redacted' and share the full output. If you get command not found, please make sure to update rclone.

[jeroen]
type = s3
provider = Other
list_version = 2
endpoint = jeroen.r-universe.dev

A log from the command that you were trying to run with the -vv flag

2025/03/08 14:35:26 DEBUG : rclone: Version "v1.69.1" starting with parameters ["rclone" "-vv" "lsd" ":s3,provider=Cloudflare,endpoint=jeroen.r-universe.dev:"]
2025/03/08 14:35:26 DEBUG : Creating backend with remote ":s3,provider=Cloudflare,endpoint=jeroen.r-universe.dev:"
2025/03/08 14:35:26 DEBUG : Using config file from "/Users/jeroen/.config/rclone/rclone.conf"
2025/03/08 14:35:26 DEBUG : :s3: detected overridden config - adding "{X99tj}" suffix to name
2025/03/08 14:35:26 DEBUG : Using anonymous credentials - did you mean to set env_auth=true?
2025/03/08 14:35:26 DEBUG : fs cache: renaming cache item ":s3,provider=Cloudflare,endpoint=jeroen.r-universe.dev:" to be canonical ":s3{X99tj}:"
2025/03/08 14:35:26 ERROR : : Entry doesn't belong in directory "" (same as directory) - ignoring
2025/03/08 14:35:26 DEBUG : 5 go routines active
2

welcome to the forum,

might try --s3-no-check-bucket

https://rclone.org/commands/rclone_serve_s3/

for a deeper look at the api calls, use--dump flags such as --dump=headers

3

For some reason it does work if I treat it as virtual-host-style bucket r-universe.dev:jeroen instead of the a path style bucket r-universe.dev:jeroen. So this gets me closer:

rclone copy :s3,provider=Other,list_version=2,force_path_style=false,endpoint=r-universe.dev:jeroen test

Now I run into another problem: for some files in my list, the size is unkown. The API_ListObjectsV2 spec says Size is not required.

However rclone complains when it tries to download these files. For example if we run:

rclone copy :s3,provider=Other,list_version=2,force_path_style=false,endpoint=r-universe.dev:jeroen/src/ test
# ERROR : contrib/PACKAGES.ac4748ef.partial: corrupted on transfer: sizes differ src(S3 bucket jeroen path src) 0 vs dst(Local file system at /Users/jeroen/workspace/r-universe/express-frontend/test) 5259
# ERROR : contrib/PACKAGES.gz.ac4748ef.partial: corrupted on transfer: sizes differ src(S3 bucket jeroen path src) 0 vs dst(Local file system at /Users/jeroen/workspace/r-universe/express-frontend/test) 1990

Is there something I can do on the server or client side to support listing files with unknown size?

4

maybe try --ignore-size

5

OK thank you, so this long style command now works as you can confirm:

rclone copy --ignore-size :s3,provider=Other,list_version=2,force_path_style=false,endpoint=r-universe.dev:jeroen ./jeroen

However I can't make it work in a config file. Using exactly these values:

[jeroen]
type = s3
provider = Other
list_version=2
force_path_style=false
endpoint = r-universe.dev
ignore_size = 1

However the force_path_style and ignore_size options do not seem to do anything now?

How do I specify the equivalent of command line virtual-host endpoint=r-universe.dev:jeroen in the config?

6

global flags cannot go into the config file.

[s3]
type = s3
provider = Other
list_version=2
force_path_style=false
endpoint = r-universe.dev

[jeroen]
type = alias
remote = s3:jeroen

and then use it
rclone lsd jeroen:

7

This has to do with how prefixes are displayed.
I suggest creating a bucket with the same objects in an S3-compatible service, listing the objects, and then comparing it to what is displayed in your implementation.

8

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