From ccb267eae4201748cf6d35391685404508d437ab Mon Sep 17 00:00:00 2001
From: 3846masa <3846masahiro+git@gmail.com>
Date: Thu, 2 May 2024 19:56:12 +0900
Subject: [PATCH] chore: fix types for undici v6.7.0 * related:
 https://github.com/nodejs/undici/pull/2708

---
 src/undici/utils/convert_to_headers_object.ts | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/undici/utils/convert_to_headers_object.ts b/src/undici/utils/convert_to_headers_object.ts
index 976dd8a8..e26142f8 100644
--- a/src/undici/utils/convert_to_headers_object.ts
+++ b/src/undici/utils/convert_to_headers_object.ts
@@ -2,8 +2,17 @@
 import { errors } from 'undici';
 import type { IncomingHttpHeaders } from 'undici/types/header';
 
+function isIterable(value: unknown): value is Iterable<unknown> {
+  return typeof value === 'object' && value != null && Symbol.iterator in value;
+}
+
 function convertToHeadersObject(
-  _headers: IncomingHttpHeaders | (string | Buffer)[] | null | undefined,
+  _headers:
+    | IncomingHttpHeaders
+    | (string | Buffer)[]
+    | Iterable<[string, string | string[] | undefined]>
+    | null
+    | undefined,
 ): IncomingHttpHeaders {
   const headers: IncomingHttpHeaders = {};
 
@@ -27,6 +36,10 @@ function convertToHeadersObject(
         }
       }
     }
+  } else if (isIterable(_headers)) {
+    for (const [key, value] of _headers) {
+      headers[key.toLowerCase()] = value;
+    }
   } else if (_headers != null) {
     for (const [key, value] of Object.entries(_headers)) {
       headers[key.toLowerCase()] = value;