feat: added CORS middleware

backend/middlewares/cors.go

@@ -0,0 +1,19 @@
+package middlewares
+
+import "github.com/gin-gonic/gin"
+
+func CORSMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(204)
+			return
+		}
+
+		c.Next()
+	}
+}

backend/router.go

@@ -29,6 +29,7 @@ func authHandler(r *gin.Engine) {
 }
 
 func router(r *gin.Engine) {
+	r.Use(middlewares.CORSMiddleware())
 	authHandler(r)
 	todosHandler(r)
 	r.NoRoute(RouteNotFound)