Add file processing

internal/handler/static.go

@@ -0,0 +1,82 @@
+package handler
+
+import (
+	"embed"
+	"html/template"
+	"log"
+	"net/http"
+	"strings"
+	"sync"
+
+	"github.com/OmniX-Space/MeowBox-Core/internal/service"
+)
+
+//go:embed web
+var webFiles embed.FS
+
+//go:embed web/index.html
+var pageTemplateContent string
+
+//go:embed web/httperr.html
+var errorTemplateContent string
+
+var (
+	pageTemplate  *template.Template
+	errorTemplate *template.Template
+	errorOnce     sync.Once
+	pageOnce      sync.Once
+)
+
+// loadPageTemplate Initialize template (executed only once)
+func loadPageTemplate() {
+	pageOnce.Do(func() {
+		var err error
+		pageTemplate, err = template.New("page").Parse(pageTemplateContent)
+		if err != nil {
+			log.Fatalf("[Error] Failed to parse page template: %v", err)
+		}
+	})
+}
+
+// loadErrorTemplate Initialize template (executed only once)
+func loadErrorTemplate() {
+	errorOnce.Do(func() {
+		var err error
+		errorTemplate, err = template.New("error").Parse(errorTemplateContent)
+		if err != nil {
+			log.Fatalf("[Error] Failed to parse error template: %v", err)
+		}
+	})
+}
+
+// StaticFileHandler Embedded static file service
+func StaticFileHandler(w http.ResponseWriter, r *http.Request) {
+	path := r.URL.Path
+
+	// Clean path, make sure it starts with "web/"
+	path = strings.TrimPrefix(path, "/")
+	if path == "" {
+		ErrorHandler(w, r, http.StatusNotFound)
+		return
+	}
+
+	// Concatenate embed.FS path
+	filePath := "web/" + path
+	data, err := webFiles.ReadFile(filePath)
+	if err != nil {
+		log.Printf("[Error] Static file not found: %s", filePath)
+		ErrorHandler(w, r, http.StatusNotFound)
+		return
+	}
+
+	// Set Content-Type
+	contentType := service.GetContentType(path)
+	SetHeaders(w, contentType)
+
+	_, _ = w.Write(data)
+}
+
+func SetHeaders(w http.ResponseWriter, contentType string) {
+	w.Header().Set("Content-Type", contentType)
+	w.Header().Set("Server", "CloudCat-Project")
+}