mod: CDN优化 issues #70

lib/utils/storage.dart

@@ -105,6 +105,7 @@ class SettingBoxKey {
   static const String enableAutoEnter = 'enableAutoEnter';
   static const String enableAutoExit = 'enableAutoExit';
   static const String p1080 = 'p1080';
+  static const String enableCDN = 'enableCDN';
 
   // youtube 双击快进快退
   static const String enableQuickDouble = 'enableQuickDouble';

lib/utils/video_utils.dart

@@ -0,0 +1,36 @@
+import 'package:pilipala/models/video/play/url.dart';
+
+class VideoUtils {
+  static String getCdnUrl(dynamic item) {
+    var backupUrl = "";
+    var videoUrl = "";
+
+    /// 先获取backupUrl 一般是upgcxcode地址 播放更稳定
+    if (item is VideoItem) {
+      backupUrl = item.backupUrl ?? "";
+      videoUrl = backupUrl.contains("http") ? backupUrl : (item.baseUrl ?? "");
+    } else if (item is AudioItem) {
+      backupUrl = item.backupUrl ?? "";
+      videoUrl = backupUrl.contains("http") ? backupUrl : (item.baseUrl ?? "");
+    } else {
+      return "";
+    }
+
+    /// issues #70
+    if (videoUrl.contains(".mcdn.bilivideo") ||
+        videoUrl.contains("/upgcxcode/")) {
+      //CDN列表
+      var cdnList = {
+        'ali': 'upos-sz-mirrorali.bilivideo.com',
+        'cos': 'upos-sz-mirrorcos.bilivideo.com',
+        'hw': 'upos-sz-mirrorhw.bilivideo.com',
+      };
+      //取一个CDN
+      var cdn = cdnList['ali'] ?? "";
+      var reg = RegExp(r'(http|https)://(.*?)/upgcxcode/');
+      videoUrl = videoUrl.replaceAll(reg, "https://$cdn/upgcxcode/");
+    }
+
+    return videoUrl;
+  }
+}