(arrow-rs-object-store) branch main updated: Use path-style URL in resolve_bucket_region for dotted bucket names (#752)

[alamb]

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alamb pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/arrow-rs-object-store.git


The following commit(s) were added to refs/heads/main by this push:
     new 49a7125  Use path-style URL in resolve_bucket_region for dotted bucket 
names (#752)
49a7125 is described below

commit 49a71257721b103b50ca02efa838ce0fc7d65f75
Author: brankogrb-db <branko.gr...@databricks.com>
AuthorDate: Mon Jun 15 20:15:08 2026 +0200

    Use path-style URL in resolve_bucket_region for dotted bucket names (#752)
    
    S3's wildcard TLS cert (*.s3.amazonaws.com) only covers one DNS
    label. Use path-style for bucket names containing dots.
    
    Closes #747
---
 src/aws/resolve.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/aws/resolve.rs b/src/aws/resolve.rs
index a09ea53..fdc9576 100644
--- a/src/aws/resolve.rs
+++ b/src/aws/resolve.rs
@@ -49,7 +49,12 @@ impl From<Error> for crate::Error {
 pub async fn resolve_bucket_region(bucket: &str, client_options: 
&ClientOptions) -> Result<String> {
     use http::StatusCode;
 
-    let endpoint = format!("https://{bucket}.s3.amazonaws.com";);
+    // S3's wildcard TLS cert (*.s3.amazonaws.com) only covers one DNS label. 
Use path-style for dotted names.
+    let endpoint = if bucket.contains('.') {
+        format!("https://s3.amazonaws.com/{bucket}";)
+    } else {
+        format!("https://{bucket}.s3.amazonaws.com";)
+    };
 
     let client = client_options.client()?;