From 004b3ac8324e6cdbfb5d04b8bbdc6664ea48fbcf Mon Sep 17 00:00:00 2001
From: Alex Kondratyuk <lynxtaa@gmail.com>
Date: Thu, 28 Apr 2022 12:33:26 +0300
Subject: [PATCH] fix: don't uppercase unknown methods (#1542)

* fix: don't uppercase unknown methods
---
 src/request.js  |  4 +++-
 test/request.js | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/request.js b/src/request.js
index a4d1b2209..a63f7e606 100644
--- a/src/request.js
+++ b/src/request.js
@@ -61,7 +61,9 @@ export default class Request extends Body {
 		}
 
 		let method = init.method || input.method || 'GET';
-		method = method.toUpperCase();
+		if (/^(delete|get|head|options|post|put)$/i.test(method)) {
+			method = method.toUpperCase();
+		}
 
 		if ('data' in init) {
 			doBadDataWarn();
diff --git a/test/request.js b/test/request.js
index b8ba107e9..03cbe3cf1 100644
--- a/test/request.js
+++ b/test/request.js
@@ -151,6 +151,24 @@ describe('Request', () => {
 		expect(request.headers.get('a')).to.equal('1');
 	});
 
+	it('should uppercase DELETE, GET, HEAD, OPTIONS, POST and PUT methods', () => {
+		const url = base;
+		for (const method of ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT']) {
+			const request = new Request(url, {
+				method: method.toLowerCase()
+			});
+			expect(request.method).to.equal(method);
+		}
+	});
+
+	it('should not uppercase unknown methods and patch', () => {
+		const url = base;
+		for (const method of ['patch', 'chicken']) {
+			const request = new Request(url, {method});
+			expect(request.method).to.equal(method);
+		}
+	});
+
 	it('should support arrayBuffer() method', () => {
 		const url = base;
 		const request = new Request(url, {