feat: auto updater (#933)

ui/flutter/lib/util/github_mirror.dart

@@ -0,0 +1,79 @@
+import 'package:dio/dio.dart';
+
+// List of mirrors for GitHub
+const _sourceMirror = [
+  // ghfast.top: https://ghfast.top/https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_all.txt
+  ["https://ghfast.top/", r"(.*)"],
+  // github.moeyy.xyz: https://github.moeyy.xyz/https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_all.txt
+  ["https://github.moeyy.xyz/", r"(.*)"],
+  // jsdelivr: https://fastly.jsdelivr.net/gh/ngosang/trackerslist/trackers_all.txt
+  [
+    "https://fastly.jsdelivr.net/gh",
+    r".*raw.githubusercontent.com(/.*)(/.*)/(?:master|main)(/.*)"
+  ],
+];
+
+// List of mirrors for GitHub release
+const _assertMirror = [
+  // ghfast.top: https://ghfast.top/https://github.com/GopeedLab/gopeed/releases/download/v1.6.10/Gopeed-v1.6.10-windows-amd64.zip
+  ["https://ghfast.top/", r"(.*)"],
+  // github.moeyy.xyz: https://github.moeyy.xyz/https://github.com/GopeedLab/gopeed/releases/download/v1.6.10/Gopeed-v1.6.10-windows-amd64.zip
+  ["https://github.moeyy.xyz/", r"(.*)"],
+];
+
+enum MirrorType {
+  githubSource,
+  githubRelease,
+}
+
+/// Auto detect the best mirror for the given [rawUrl] and [type]
+Future<String> githubAutoMirror(String rawUrl, MirrorType type) async {
+  final mirrorUrls = githubMirrorUrls(rawUrl, type);
+
+  // Ping all mirrors and get the fastest one
+  final pingResult = await Future.wait(mirrorUrls.map((e) async {
+    final client = Dio()
+      ..options.sendTimeout = const Duration(seconds: 3)
+      ..options.connectTimeout = const Duration(seconds: 3);
+    var time = DateTime.now().millisecondsSinceEpoch;
+    try {
+      final response = await client.head(e);
+      if (response.statusCode == 200) {
+        time = DateTime.now().millisecondsSinceEpoch - time;
+        return (e, time);
+      }
+    } catch (e) {
+      // ignore
+    } finally {
+      client.close();
+    }
+    return (e, -1);
+  }));
+
+  var list = pingResult.where((e) => e.$2 != -1).toList()
+    ..sort((a, b) => a.$2.compareTo(b.$2));
+  if (list.isNotEmpty) {
+    return list.first.$1;
+  }
+
+  return rawUrl;
+}
+
+List<String> githubMirrorUrls(String rawUrl, MirrorType type) {
+  final mirrors = switch (type) {
+    MirrorType.githubSource => _sourceMirror,
+    MirrorType.githubRelease => _assertMirror,
+  };
+
+  final ret = <String>[];
+  for (final cdn in mirrors) {
+    final reg = RegExp(cdn[1]);
+    final match = reg.firstMatch(rawUrl.toString());
+    var matchStr = "";
+    for (var i = 1; i <= match!.groupCount; i++) {
+      matchStr += match.group(i)!;
+    }
+    ret.add("${cdn[0]}$matchStr");
+  }
+  return ret;
+}