Feature: sync missing resolver logic from premium, but still net.IP on opensource

dns/doh.go

@@ -4,7 +4,9 @@ import (
 	"bytes"
 	"context"
 	"crypto/tls"
+	"fmt"
 	"io"
+	"math/rand"
 	"net"
 	"net/http"
 
@@ -91,10 +93,13 @@ func newDoHClient(url, iface string, r *Resolver) *dohClient {
 					return nil, err
 				}
 
-				ip, err := resolver.ResolveIPWithResolver(host, r)
+				ips, err := resolver.LookupIPWithResolver(ctx, host, r)
 				if err != nil {
 					return nil, err
+				} else if len(ips) == 0 {
+					return nil, fmt.Errorf("%w: %s", resolver.ErrIPNotFound, host)
 				}
+				ip := ips[rand.Intn(len(ips))]
 
 				options := []dialer.Option{}
 				if iface != "" {