a10y opened a new issue, #779:
URL: https://github.com/apache/arrow-rs-object-store/issues/779
**Describe the bug**
S3 supports both standard endpoints, e.g. `s3.REGION.amazonaws.com`, as well
as a dual-stack endpoint variant, which allows clients to resolve either
IPv4/v6, e.g. `s3.dualstack.REGION.amazonaws.com`
**To Reproduce**
The following unit test using the `DefaultObjectStoreRegistry` fails to
properly resolve a store for a dualstack endpoint:
```
#[test]
fn test_resolve_s3_dualstack_endpoint() {
let registry = DefaultObjectStoreRegistry::new();
let url = Url::parse(
"https://s3.dualstack.us-east-1.amazonaws.com/static.customizedgirl.com/images/design/3747d20127af39238a380d4fface92b1_1639568_0_bigger.jpg";,
)
.unwrap();
let (_store, path) = registry
.resolve(&url)
.expect("registry should resolve S3 dual-stack endpoints");
// The bucket (`static.customizedgirl.com`) is the first path
segment and
// should be stripped, leaving the object key as the trailing path.
assert_eq!(
path.as_ref(),
"images/design/3747d20127af39238a380d4fface92b1_1639568_0_bigger.jpg"
);
}
```
**Expected behavior**
The registry should return an `AmazonS3` store with the dualstack endpoint
configured and the `us-east-1` region set.
**Additional context**
I noticed this while trying to write some code that downloads data from the
[PIXMO dataset](https://huggingface.co/datasets/allenai/pixmo-cap) on
HuggingFace, which is a collection of image URLs and descriptions.
The repro above uses the URL which failed for me.
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![https://s3.dualstack.us-east-1.amazonaws.com/static.customizedgirl.com/images/design/3747d20127af39238a380d4fface92b1_1639568_0_bigger.jpg"](https://s3.dualstack.us-east-1.amazonaws.com/static.customizedgirl.com/images/design/3747d20127af39238a380d4fface92b1_1639568_0_bigger.jpg"){kind=link}