gqlgen cors with Mux

main_go_diff.patch

Index: server.go
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/server.go b/server.go
--- a/server.go	
+++ b/server.go	(date 1642337159905)
@@ -1,16 +1,15 @@
 package main
 
-
-
 import (
-	"log"
-	"net/http"
-	"os"
-
 	"github.com/99designs/gqlgen/graphql/handler"
 	"github.com/99designs/gqlgen/graphql/playground"
+	"github.com/gorilla/mux"
+	"github.com/rs/cors"
+	"log"
+	"net/http"
+	"os"
 )
 
 const defaultPort = "8080"
@@ -23,9 +22,17 @@
 
 	srv := handler.NewDefaultServer(generated.NewExecutableSchema(generated.Config{Resolvers: &graph.Resolver{}}))
 
-	http.Handle("/", playground.Handler("GraphQL playground", "/query"))
-	http.Handle("/query", srv)
+	router := mux.NewRouter()
+
+	router.Handle("/", playground.Handler("GraphQL playground", "/query"))
+	router.Handle("/query", srv)
 
+	c := cors.New(cors.Options{
+		AllowedOrigins:   []string{"http://localhost:19006"},
+		AllowCredentials: true,
+	})
+
+	srvHandler := c.Handler(router)
 	log.Printf("connect to http://localhost:%s/ for GraphQL playground", port)
-	log.Fatal(http.ListenAndServe(":"+port, nil))
+	log.Fatal(http.ListenAndServe(":"+port, srvHandler))
 }