初始提交：短剧库源码（含转码优化 ultrafast）

internal/app/ui_page.go

@@ -0,0 +1,43 @@
+package app
+
+import (
+	"crypto/sha256"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"juku/internal/webui"
+)
+
+var uiHTML = webui.HTML
+
+func webAssets() http.Handler {
+	tags := map[string]string{}
+	entries, _ := webui.Assets.ReadDir(".")
+	for _, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		body, err := webui.Assets.ReadFile(entry.Name())
+		if err == nil {
+			tags["/assets/"+entry.Name()] = fmt.Sprintf(`"%x"`, sha256.Sum256(body))
+		}
+	}
+	files := http.StripPrefix("/assets/", http.FileServer(http.FS(webui.Assets)))
+	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		writer.Header().Set("Cache-Control", "no-cache")
+		if tag := tags[request.URL.Path]; tag != "" {
+			writer.Header().Set("ETag", tag)
+			if request.Method == http.MethodGet || request.Method == http.MethodHead {
+				for _, candidate := range strings.Split(request.Header.Get("If-None-Match"), ",") {
+					candidate = strings.TrimPrefix(strings.TrimSpace(candidate), "W/")
+					if candidate == tag || candidate == "*" {
+						writer.WriteHeader(http.StatusNotModified)
+						return
+					}
+				}
+			}
+		}
+		files.ServeHTTP(writer, request)
+	})
+}