From 63ec0d559b2ee014c6ddbc2008439ad093f7a722 Mon Sep 17 00:00:00 2001
From: Antonio De Lucreziis <antonio.delucreziis@gmail.com>
Date: Mon, 29 Aug 2022 01:30:08 +0200
Subject: [PATCH] Miglior gestione dei file statici

---
 server/fiber.go | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/server/fiber.go b/server/fiber.go
index ed7e191..66af044 100644
--- a/server/fiber.go
+++ b/server/fiber.go
@@ -3,9 +3,11 @@ package server
 import (
 	"time"
 
+	"git.phc.dm.unipi.it/phc/website/config"
 	"git.phc.dm.unipi.it/phc/website/handler"
 	"git.phc.dm.unipi.it/phc/website/model"
 	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/fiber/v2/middleware/etag"
 	"github.com/gofiber/fiber/v2/middleware/logger"
 	"github.com/gofiber/fiber/v2/middleware/recover"
 	"github.com/gofiber/redirect/v2"
@@ -52,9 +54,28 @@ func routes(h handler.Service, r fiber.Router) {
 		},
 	}))
 
+	// Better static file serving setup
+	r.Route("/public", func(r fiber.Router) {
+		// Cache client side files based on checksum
+		r.Use(etag.New())
+
+		staticConfig := fiber.Static{}
+		if config.Mode == "development" {
+			// if no "Cache-Control" is present the browser will cache heuristically (and we don't want that)
+			r.Use(func(c *fiber.Ctx) error {
+				c.Set("Cache-Control", "no-cache")
+				return c.Next()
+			})
+
+			staticConfig.CacheDuration = -1
+			staticConfig.MaxAge = -1
+		}
+
+		r.Static("/", "./_frontend/out", staticConfig)
+		r.Static("/", "./_public", staticConfig)
+	})
+
 	// Serve generated css and js files and the static "./_public" folder
-	r.Static("/public/", "./_frontend/out")
-	r.Static("/public/", "./_public")
 
 	// Process all request and add user to the request context if there is a session cookie
 	r.Use(UserMiddleware(h))