feat(bat-api): 实现内嵌 dashboard

Closes #46

internal/api/dashboard.go

@@ -0,0 +1,37 @@
+package api
+
+import (
+	"net/http"
+	"strings"
+
+	dashboard "bat-api/web"
+)
+
+const adminDashboardPath = "/admin/dashboard"
+
+var adminDashboardFileServer = http.FileServer(http.FS(dashboard.Assets))
+
+func (s *Server) handleAdminDashboard(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet && r.Method != http.MethodHead {
+		writeErrorJSON(w, http.StatusMethodNotAllowed, "method_not_allowed", "method not allowed")
+		return
+	}
+	w.Header().Set("Cache-Control", "no-store")
+	if r.URL.Path == adminDashboardPath {
+		http.Redirect(w, r, adminDashboardPath+"/", http.StatusMovedPermanently)
+		return
+	}
+	if !strings.HasPrefix(r.URL.Path, adminDashboardPath+"/") {
+		http.NotFound(w, r)
+		return
+	}
+	http.StripPrefix(adminDashboardPath+"/", adminDashboardFileServer).ServeHTTP(w, r)
+}
+
+func dashboardAuthExemptPaths() []string {
+	return []string{adminDashboardPath, adminDashboardPath + "/"}
+}
+
+func isAdminDashboardPath(path string) bool {
+	return path == adminDashboardPath || strings.HasPrefix(path, adminDashboardPath+"/")
+}