Path style breaks fetching INDEX_PAGE

[HighOnMikey]

loadContent will always attempt fetching the INDEX_PAGE by building the URI path using s3uri().

When using S3_STYLE = 'path', this will prepend the URI path with the S3 bucket. However, the fetch is made against nginx itself, meaning the URI path will always be incorrect for the requested index.

To Reproduce

Set the following variables:

ALLOW_DIRECTORY_LIST=true
PROVIDE_INDEX_PAGE=true
S3_STYLE=path

Expected behavior

Incorrect URI currently being built: http://127.0.0.1/<bucket_name>/<request_path>/<INDEX_PAGE>

Expected URI: http://127.0.0.1/<request_path>/<INDEX_PAGE>

Environments Tested

• master @ c687663
• ghcr.io/nginxinc/nginx-s3-gateway/nginx-oss-s3-gateway:latest
• Backends: AWS, Ceph, OpenStack Swift

Workaround

I would submit a PR but I'm not sure which direction would be preferred by the project to go about building the URI path. However, here's a quick fix to demonstrate the issue:

From

const uri = s3uri(r);

To

let uri;
if (S3_STYLE === 'path') {
    uri = `${r.uri}${INDEX_PAGE}`;
} else {
    uri = s3uri(r);
}