Support file: URLs in `fetch` (#3858)

* Support file: URLs in `fetch`

* Update url.zig

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/test/js/web/fetch/fetch.test.ts b/test/js/web/fetch/fetch.test.ts
index 768818420..d7fc87ade 100644
--- a/test/js/web/fetch/fetch.test.ts
+++ b/test/js/web/fetch/fetch.test.ts
@@ -1203,3 +1203,13 @@ it("new Request(https://example.com, otherRequest) uses url from left instead of
   expect(req2.url).toBe("http://localhost/def");
   expect(req2.headers.get("foo")).toBe("bar");
 });
+
+it("fetch() file:// works", async () => {
+  expect(await (await fetch(import.meta.url)).text()).toEqual(await Bun.file(import.meta.path).text());
+  expect(await (await fetch(new URL("fetch.test.ts", import.meta.url))).text()).toEqual(
+    await Bun.file(Bun.fileURLToPath(new URL("fetch.test.ts", import.meta.url))).text(),
+  );
+  expect(await (await fetch(new URL("file with space in the name.txt", import.meta.url))).text()).toEqual(
+    await Bun.file(Bun.fileURLToPath(new URL("file with space in the name.txt", import.meta.url))).text(),
+  );
+});