fix regional domain name creation

bentsku · bentsku · commit 81db507785e8 · 2026-01-13T15:03:07.000+01:00
diff --git a/localstack-core/localstack/services/apigateway/helpers.py b/localstack-core/localstack/services/apigateway/helpers.py
@@ -984,20 +984,20 @@ def is_variable_path(path_part: str) -> bool:
     return path_part.startswith("{") and path_part.endswith("}")
 
 
-def get_domain_name_hash(domain_name: str) -> str:
+def get_domain_name_hash(domain_name: str, region_name: str) -> str:
     """
     Return a hash of the given domain name, which help construct regional domain names for APIs.
     TODO: use this in the future to dispatch API Gateway API invocations made to the regional domain name
     """
-    return hashlib.shake_128(to_bytes(domain_name)).hexdigest(4)
+    return hashlib.shake_128(to_bytes(domain_name + region_name)).hexdigest(4)
 
 
-def get_regional_domain_name(domain_name: str) -> str:
+def get_regional_domain_name(domain_name: str, region_name: str) -> str:
     """
     Return the regional domain name for the given domain name.
     In real AWS, this would look something like: "d-oplm2qchq0.execute-api.us-east-1.amazonaws.com"
     In LocalStack, we're returning this format: "d-<domain_hash>.execute-api.localhost.localstack.cloud"
     """
-    domain_name_hash = get_domain_name_hash(domain_name)
+    domain_name_hash = get_domain_name_hash(domain_name, region_name)
     host = localstack_host().host
     return f"d-{domain_name_hash}.execute-api.{host}"
diff --git a/localstack-core/localstack/services/apigateway/legacy/provider.py b/localstack-core/localstack/services/apigateway/legacy/provider.py
@@ -562,7 +562,7 @@ def create_domain_name(
             domainName=domain_name,
             certificateName=certificate_name,
             certificateArn=certificate_arn,
-            regionalDomainName=get_regional_domain_name(domain_name),
+            regionalDomainName=get_regional_domain_name(domain_name, context.region),
             domainNameStatus=DomainNameStatus.AVAILABLE,
             regionalHostedZoneId=zone_id,
             regionalCertificateName=regional_certificate_name,
