Title: Dataset Viewer issue for shamikbose89/lancaster_newsbooks
Author: shamikbose (NONE)
State: closed
Created: 2022-07-19T20:00:07Z

### Link

https://huggingface.co/datasets/shamikbose89/lancaster_newsbooks

### Description

Status code:   400
Exception:     ValueError
Message:       Cannot seek streaming HTTP file

I am able to use the dataset loading script locally and it also runs when I'm using the one from the hub, but the viewer still doesn't load

### Owner

Yes

Comments:
It seems like the list of splits could not be obtained:

```python
>>> from datasets import get_dataset_split_names
>>> get_dataset_split_names("shamikbose89/lancaster_newsbooks", "default")
Using custom data configuration default
Traceback (most recent call last):
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/inspect.py", line 354, in get_dataset_config_info
    for split_generator in builder._split_generators(
  File "/home/slesage/.cache/huggingface/modules/datasets_modules/datasets/shamikbose89--lancaster_newsbooks/2d1c63d269bf7b9342accce0a95960b1710ab4bc774248878bd80eb96c1afaf7/lancaster_newsbooks.py", line 73, in _split_generators
    data_dir = dl_manager.download_and_extract(_URL)
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/download/streaming_download_manager.py", line 916, in download_and_extract
    return self.extract(self.download(url_or_urls))
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/download/streaming_download_manager.py", line 879, in extract
    urlpaths = map_nested(self._extract, path_or_paths, map_tuple=True)
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/utils/py_utils.py", line 348, in map_nested
    return function(data_struct)
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/download/streaming_download_manager.py", line 884, in _extract
    protocol = _get_extraction_protocol(urlpath, use_auth_token=self.download_config.use_auth_token)
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/download/streaming_download_manager.py", line 388, in _get_extraction_protocol
    return _get_extraction_protocol_with_magic_number(f)
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/download/streaming_download_manager.py", line 354, in _get_extraction_protocol_with_magic_number
    f.seek(0)
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/fsspec/implementations/http.py", line 684, in seek
    raise ValueError("Cannot seek streaming HTTP file")
ValueError: Cannot seek streaming HTTP file

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/inspect.py", line 404, in get_dataset_split_names
    info = get_dataset_config_info(
  File "/home/slesage/hf/datasets-server/services/worker/.venv/lib/python3.9/site-packages/datasets/inspect.py", line 359, in get_dataset_config_info
    raise SplitsNotFoundError("The split names could not be parsed from the dataset config.") from err
datasets.inspect.SplitsNotFoundError: The split names could not be parsed from the dataset config.
```

ping @huggingface/datasets 

Oh, I removed the 'split' key from `kwargs`. I put  it back in, but there's still the same error

It looks like the data host doesn't support http range requests, which is necessary to glob inside a ZIP archive in streaming mode. Can you try hosting the dataset elsewhere ? Or download each file separately from https://ota.bodleian.ox.ac.uk/repository/xmlui/handle/20.500.12024/2531 ?

@lhoestq Thanks! That seems to have solved it. I can get the splits with the `get_dataset_split_names()` function. The dataset viewer is still not loading properly, though. The new error is
```
Status code:   400
Exception:     BadZipFile
Message:       File is not a zip file
```

PS. The dataset loads properly and can be accessed