From a845ba4f4162d9853d2964434401f5855d869e7c Mon Sep 17 00:00:00 2001
From: Travis Prescott <trpresco@microsoft.com>
Date: Thu, 28 Mar 2024 14:45:49 -0700
Subject: [PATCH] Code review feedback.

---
 .../src/rules/lro-location-header.ts          | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/packages/typespec-azure-resource-manager/src/rules/lro-location-header.ts b/packages/typespec-azure-resource-manager/src/rules/lro-location-header.ts
index eac5743a9e..5289988e95 100644
--- a/packages/typespec-azure-resource-manager/src/rules/lro-location-header.ts
+++ b/packages/typespec-azure-resource-manager/src/rules/lro-location-header.ts
@@ -1,6 +1,21 @@
-import { Operation, createRule } from "@typespec/compiler";
+import { ModelProperty, Operation, createRule } from "@typespec/compiler";
 import { getHttpOperation } from "@typespec/http";
 
+function getCaseInsensitiveHeader(
+  headers: Record<string, ModelProperty> | undefined,
+  key: string
+): string | undefined {
+  if (!headers) {
+    return undefined;
+  }
+  for (const header of Object.keys(headers)) {
+    if (header.toLowerCase() === key.toLowerCase()) {
+      return header;
+    }
+  }
+  return undefined;
+}
+
 /**
  * Ensure that LRO 202 responses have a Location Header.
  */
@@ -22,7 +37,7 @@ export const lroLocationHeaderRule = createRule({
             continue;
           }
           for (const resp of response.responses) {
-            if (resp.headers?.["Location"] === undefined) {
+            if (getCaseInsensitiveHeader(resp.headers, "Location") === undefined) {
               context.reportDiagnostic({
                 target: op,
               });