fix(net): handle panic on Windows for Unix socket usage in Deno.serve() (#24423)

This PR addresses the issue where Deno.serve() panics on Windows when
trying to use a Unix socket.
Fixes #21967

ext/net/lib.rs

@@ -158,14 +158,28 @@ mod ops_unix {
   macro_rules! stub_op {
     ($name:ident) => {
       #[op2(fast)]
-      pub fn $name() {
+      pub fn $name() -> Result<(), std::io::Error> {
-        panic!("Unsupported on non-unix platforms")
+        let error_msg = format!(
+          "Operation `{:?}` not supported on non-unix platforms.",
+          stringify!($name)
+        );
+        Err(std::io::Error::new(
+          std::io::ErrorKind::Unsupported,
+          error_msg,
+        ))
       }
     };
     ($name:ident<P>) => {
       #[op2(fast)]
-      pub fn $name<P: NetPermissions>() {
+      pub fn $name<P: NetPermissions>() -> Result<(), std::io::Error> {
-        panic!("Unsupported on non-unix platforms")
+        let error_msg = format!(
+          "Operation `{:?}` not supported on non-unix platforms.",
+          stringify!($name)
+        );
+        Err(std::io::Error::new(
+          std::io::ErrorKind::Unsupported,
+          error_msg,
+        ))
       }
     };
   }

tests/unit/serve_test.ts

@@ -4034,3 +4034,28 @@ Deno.test(
     await server.finished;
   },
 );
+
+Deno.test({
+  name: "HTTP Server test (error on non-unix platform)",
+  ignore: Deno.build.os !== "windows",
+}, async () => {
+  await assertRejects(
+    async () => {
+      const ac = new AbortController();
+      const server = Deno.serve({
+        path: "path/to/socket",
+        handler: (_req) => new Response("Hello, world"),
+        signal: ac.signal,
+        onListen({ path: _path }) {
+          console.log(`Server started at ${_path}`);
+        },
+      });
+      server.finished.then(() => console.log("Server closed"));
+      console.log("Closing server...");
+      ac.abort();
+      await new Promise((resolve) => setTimeout(resolve, 100)); // Example of awaiting something
+    },
+    Error,
+    'Operation `"op_net_listen_unix"` not supported on non-unix platforms.',
+  );
+});