ci: add subdomain test case

tests/http_server.go

@@ -3,6 +3,7 @@ package tests
 import (
 	"fmt"
 	"net/http"
+	"regexp"
 	"strings"
 )
 
@@ -12,6 +13,18 @@ func StartHttpServer() {
 }
 
 func request(w http.ResponseWriter, r *http.Request) {
+	match, err := regexp.Match(`.*\.sub\.com`, []byte(r.Host))
+	if err != nil {
+		w.WriteHeader(500)
+		return
+	}
+
+	if match {
+		w.WriteHeader(200)
+		w.Write([]byte(r.Host))
+		return
+	}
+
 	if strings.Contains(r.Host, "127.0.0.1") || strings.Contains(r.Host, "test2.frp.com") ||
 		strings.Contains(r.Host, "test5.frp.com") {
 		w.WriteHeader(200)