Adding cors header

Author: vikash

pkg/gofr/http/middleware/cors.go

@@ -0,0 +1,20 @@
+package middleware
+
+import "net/http"
+
+func CORS() func(inner http.Handler) http.Handler {
+	return func(inner http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+
+			w.Header().Set("Access-Control-Allow-Origin", "*")
+			w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+
+			if r.Method == http.MethodOptions {
+				w.WriteHeader(http.StatusOK)
+				return
+			}
+
+			inner.ServeHTTP(w, r)
+		})
+	}
+}

pkg/gofr/http/router.go

@@ -21,6 +21,7 @@ func NewRouter() *Router {
 	muxRouter.Use(
 		middleware.Tracer,
 		middleware.Logging(logging.NewLogger(logging.INFO)),
+		middleware.CORS(),
 	)
 
 	return &Router{