dimas-b commented on code in PR #864:
URL: https://github.com/apache/polaris/pull/864#discussion_r1929224912


##########
service/common/src/main/java/org/apache/polaris/service/exception/IcebergExceptionMapper.java:
##########
@@ -144,4 +112,56 @@ public static boolean containsAnyAccessDeniedHint(String 
message) {
   public static Collection<String> getAccessDeniedHints() {
     return ImmutableSet.copyOf(ACCESS_DENIED_HINTS);
   }
+
+  static int mapExceptionToResponseCode(RuntimeException rex) {
+    // Cloud exceptions
+    if (rex instanceof S3Exception
+        || rex instanceof AzureException
+        || rex instanceof StorageException) {
+      if (doesAnyThrowableContainAccessDeniedHint(rex)) {
+        return Response.Status.FORBIDDEN.getStatusCode();
+      }
+
+      int httpCode =
+          switch (rex) {
+            case S3Exception s3e -> s3e.statusCode();
+            case HttpResponseException hre -> 
hre.getResponse().getStatusCode();
+            case StorageException se -> se.getCode();
+            default -> -1;
+          };
+
+      if (300 <= httpCode && httpCode <= 499) {
+        return httpCode;

Review Comment:
   (Tangential comment about zone IDs, etc.: Ideally storage config should be 
validated at catalog creation time. Then, at REST Catalog request time, the 
server will be able to assume the config is valid).



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