fix s3 endpoint resolution issue in new SDK version (#1397)

Author: richarddavison

build.mjs

@@ -252,7 +252,8 @@ function defaultEndpointResolver(endpointParams, context = {}) {
     const { hostname, protocol, pathname, search } = endpoint.url;
     const [bucket, host] = hostname.split(".s3.");
     if (host) {
-      const newHref = `${protocol}//s3.${host}/${bucket}${pathname}${
+      const path = pathname === "/" ? "" : pathname;
+      const newHref = `${protocol}//s3.${host}/${bucket}${path}${
         search ? `?${search}` : ""
       }`;
       endpoint.url.href = newHref;

example/functions/package.json

@@ -7,17 +7,17 @@
     "build": "node build.mjs"
   },
   "dependencies": {
-    "@aws-sdk/client-dynamodb": "3.901.0",
-    "@aws-sdk/client-ec2": "3.901.0",
-    "@aws-sdk/client-s3": "3.901.0",
-    "aws-sdk": "2.1692.0",
+    "@aws-sdk/client-dynamodb": "3.991.0",
+    "@aws-sdk/client-ec2": "3.991.0",
+    "@aws-sdk/client-s3": "3.991.0",
+    "aws-sdk": "2.1693.0",
     "esbuild-css-modules-plugin": "3.1.5",
     "react": "19.2.4",
     "react-dom": "19.2.4"
   },
   "devDependencies": {
-    "@types/react": "19.2.13",
+    "@types/react": "19.2.14",
     "@types/react-dom": "19.2.3",
-    "esbuild": "0.25.11"
+    "esbuild": "0.27.3"
   }
 }