Initial cloud-services repo - gateway service + pkg modules

pkg/httphandlers/cors_handler.go

@@ -0,0 +1,37 @@
+package httphandlers
+
+import "net/http"
+
+// CORSHandler middleware to add CORS headers. USED FOR LOCAL DEVELOPMENT.
+func CORSHandler(next http.HandlerFunc) http.HandlerFunc {
+	wrapper := func(w http.ResponseWriter, r *http.Request) {
+		header := w.Header()
+
+		header.Set("Access-Control-Allow-Credentials", "true")
+		header.Set("Access-Control-Allow-Headers", "*")
+		header.Set("Access-Control-Allow-Origin", "*")
+		header.Set("Access-Control-Allow-Methods", "*")
+
+		if r.Method == http.MethodOptions {
+			w.WriteHeader(http.StatusOK)
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	}
+
+	return wrapper
+}
+
+func HttpRouterCORSHandler() http.HandlerFunc {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		header := w.Header()
+		header.Set("Access-Control-Allow-Credentials", "true")
+		header.Set("Access-Control-Allow-Headers", "*")
+		header.Set("Access-Control-Allow-Origin", "*")
+		header.Set("Access-Control-Allow-Methods", "*")
+
+		// Adjust status code to 204
+		w.WriteHeader(http.StatusNoContent)
+	})
+}