Cache javascripts in browser

.air.toml

@@ -7,7 +7,7 @@ tmp_dir = "tmp"
 
 [build]
 # Just plain old shell command. You could use `make` as well.
-cmd = "go build -o ./tmp/main ."
+cmd = "go build -ldflags=\"-X 'github.com/0xJacky/Nginx-UI/server/settings.BuildTime=$(date +%Y.%m.%d.%H%M%S)'\" -o ./tmp/main ."
 # Binary file yields from `cmd`.
 bin = "tmp/main"
 # Customize binary.

.github/workflows/build.yml

@@ -151,7 +151,7 @@ jobs:
             - name: Build
               run: |
                   mkdir -p dist
-                  go build -ldflags "$LD_FLAGS" -o dist/nginx-ui -v main.go
+                  go build -ldflags "$LD_FLAGS -X 'github.com/0xJacky/Nginx-UI/server/settings.BuildTime=$(date +%Y.%m.%d.%H%M%S)'" -o dist/nginx-ui -v main.go
 
             - name: Archive backend artifacts
               uses: actions/upload-artifact@v2

server/router/middleware.go

@@ -4,14 +4,29 @@ import (
 	"encoding/base64"
 	"github.com/0xJacky/Nginx-UI/frontend"
 	"github.com/0xJacky/Nginx-UI/server/model"
+	"github.com/0xJacky/Nginx-UI/server/settings"
 	"github.com/gin-contrib/static"
 	"github.com/gin-gonic/gin"
 	"io/fs"
 	"log"
 	"net/http"
 	"path"
+	"strings"
+	"time"
 )
 
+func recovery() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		defer func() {
+			if err := recover(); err != nil {
+				log.Println(err)
+			}
+		}()
+
+		c.Next()
+	}
+}
+
 func authRequired() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		token := c.GetHeader("Authorization")
@@ -64,3 +79,18 @@ func mustFS(dir string) (serverFileSystem static.ServeFileSystem) {
 
 	return
 }
+
+func cacheJs() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if strings.Contains(c.Request.URL.String(), "js") {
+			c.Header("Cache-Control", "max-age: 1296000")
+			t, _ := time.Parse("2006.01.02.150405", settings.BuildTime)
+			t = t.Add(-8 * time.Hour)
+			lastModified := strings.ReplaceAll(t.Format(time.RFC1123), "UTC", "GMT")
+			if c.Request.Header.Get("If-Modified-Since") == lastModified {
+				c.AbortWithStatus(http.StatusNotModified)
+			}
+			c.Header("Last-Modified", lastModified)
+		}
+	}
+}

server/router/routers.go

@@ -14,7 +14,9 @@ func InitRouter() *gin.Engine {
 	r := gin.New()
 	r.Use(gin.Logger())
 
-    r.Use(gin.Recovery())
+	r.Use(recovery())
+
+	r.Use(cacheJs())
 
 	r.Use(static.Serve("/", mustFS("")))
 

server/settings/settings.go

@@ -7,6 +7,10 @@ import (
 
 var Conf *ini.File
 
+var (
+	BuildTime string
+)
+
 type Server struct {
 	HttpPort          string
 	RunMode           string