use net/http serve static file

internal/admin/handlers/assets.go

@@ -1,64 +1,19 @@
 package handlers
 
 import (
-	"bufio"
-	"io"
 	"net/http"
-	"path"
-	"regexp"
+	"strings"
 )
 
-var assetsPath = "web/assets/"
-var (
-	jsRe   = regexp.MustCompile(`^/assets/(js/.*)?.*$`)
-	cssRe  = regexp.MustCompile(`^/assets/(css/.*)?.*$`)
-	fontRe = regexp.MustCompile(`/([^/]*)?.*$`)
-)
-
-type AssetType int
-
-const (
-	AssetTypeJs AssetType = iota
-	AssetTypeCss
-	AssetTypeFont
-)
-
-func HandleGetAssets(assetType AssetType) http.HandlerFunc {
+func HandleGetAssets(pathPrefix string) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		var m = ""
-		switch assetType {
-		case AssetTypeJs:
-			m = getMatch(r, jsRe)
-			w.Header().Set("Content-Type", "application/javascript")
-		case AssetTypeCss:
-			m = getMatch(r, cssRe)
-			w.Header().Set("Content-Type", "text/css")
-		case AssetTypeFont:
-			m = getMatch(r, fontRe)
-			m = path.Join("fonts", m)
-			w.Header().Set("Content-Type", "application/font-woff2")
-		}
-		if m == "" {
-			http.NotFound(w, r)
-			return
+		upath := r.URL.Path
+		if !strings.HasPrefix(upath, "/") {
+			upath = "/" + upath
+			r.URL.Path = upath
 		}
-		f, err := assets.Open(path.Join(assetsPath, m))
-		if err != nil {
-			http.NotFound(w, r)
-			return
-		}
-		defer f.Close()
-		_, err = io.Copy(w, bufio.NewReader(f))
-		if err != nil {
-			encodeError(w, err)
-		}
-	}
-}
-
-func getMatch(r *http.Request, re *regexp.Regexp) string {
-	m := re.FindStringSubmatch(r.URL.Path)
-	if len(m) > 1 {
-		return m[1]
+		r.URL.Path = pathPrefix + r.URL.Path
+		w.Header().Set("Cache-Control", "max-age=86400")
+		http.FileServer(http.FS(assets)).ServeHTTP(w, r)
 	}
-	return ""
 }

internal/admin/routes.go

@@ -47,8 +47,8 @@ func defaultRoutes(cfg *Config) []*route {
 				WkDir:   cfg.WorkDir,
 			},
 		)},
-		{http.MethodGet, `^/assets/js/.*$`, handlers.HandleGetAssets(handlers.AssetTypeJs)},
-		{http.MethodGet, `^/assets/css/.*$`, handlers.HandleGetAssets(handlers.AssetTypeCss)},
-		{http.MethodGet, `^*.woff2$|^*.ttf$`, handlers.HandleGetAssets(handlers.AssetTypeFont)},
+		{http.MethodGet, `^/assets/js/.*$`, handlers.HandleGetAssets("/web")},
+		{http.MethodGet, `^/assets/css/.*$`, handlers.HandleGetAssets("/web")},
+		{http.MethodGet, `^*.woff2$|^*.ttf$`, handlers.HandleGetAssets("/web/assets/fonts")},
 	}
 }