mike-weiner · January 19, 2025 01:08 · Jan 19, 2025
diff --git a/custom-dns-resolver.go b/custom-dns-resolver.go
@@ -0,0 +1,35 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"time"
+)
+
+func main() {
+	customResolver := &net.Resolver{
+		PreferGo: true,
+		Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
+			return net.Dial(network, "1.1.1.1:53")
+		},
+	}
+
+	timeout := 10 * time.Second
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+
+	ipAddrs, err := customResolver.LookupIPAddr(ctx, "example.com")
+	if err != nil {
+		if ctx.Err() == context.DeadlineExceeded {
+			fmt.Println("DNS lookup timed out!")
+		} else {
+			fmt.Println("Error:", err)
+		}
+		return
+	}
+
+	for _, ipAddr := range ipAddrs {
+		fmt.Printf("%s\n", ipAddr.String())
+	}
+}