feat: improve tracker cdn (#155)

ui/flutter/lib/api/api.dart

@@ -147,6 +147,8 @@ Future<Response<String>> proxyRequest<T>(String uri,
   options.headers!["X-Target-Uri"] = uri;
 
   // add timestamp to avoid cache
-  return _client.dio.request("/api/v1/proxy?t=${DateTime.now()}",
-      data: data, options: options);
+  return _client.dio.request(
+      "/api/v1/proxy?t=${DateTime.now().millisecondsSinceEpoch}",
+      data: data,
+      options: options);
 }

ui/flutter/lib/app/modules/app/controllers/app_controller.dart

@@ -42,10 +42,13 @@ const allTrackerSubscribeUrls = [
   'https://github.com/XIU2/TrackersListCollection/raw/master/http.txt',
 ];
 const allTrackerCdns = [
-  // jsdelivr: https://cdn.jsdelivr.net/gh/ngosang/trackerslist/trackers_all.txt
-  ["https://cdn.jsdelivr.net/gh", r".*github.com(/.*)/raw/master(/.*)"],
-  // nuaa: https://hub.nuaa.cf/ngosang/trackerslist/raw/master/trackers_all.txt
-  ["https://hub.nuaa.cf", r".*github.com(/.*)"]
+  // jsdelivr: https://fastly.jsdelivr.net/gh/ngosang/trackerslist/trackers_all.txt
+  ["https://fastly.jsdelivr.net/gh", r".*github.com(/.*)/raw/master(/.*)"],
+  // ghproxy: https://ghproxy.com/https://raw.githubusercontent.com/ngosang/trackerslist/master/trackers_all.txt
+  [
+    "https://ghproxy.com/https://raw.githubusercontent.com",
+    r".*github.com(/.*)/raw(/.*)"
+  ]
 ];
 final allTrackerSubscribeUrlCdns = Map.fromIterable(allTrackerSubscribeUrls,
     key: (v) => v as String,
@@ -265,18 +268,16 @@ class AppController extends GetxController with WindowListener, TrayListener {
     final btExtConfig = downloaderConfig.value.extra.bt;
     final result = <String>[];
     for (var u in btExtConfig.trackerSubscribeUrls) {
-      var allFail = true;
-      for (var cdn in allTrackerSubscribeUrlCdns[u]!) {
-        try {
-          result.addAll(await _fetchTrackers(cdn));
-          allFail = false;
-          break;
-        } catch (e) {
-          logger.w("subscribe trackers fail, url: $cdn", e);
-        }
+      final cdns = allTrackerSubscribeUrlCdns[u];
+      if (cdns == null) {
+        continue;
       }
-      if (allFail) {
-        throw Exception('subscribe trackers fail, network error');
+      try {
+        final trackers =
+            await Util.anyOk(cdns.map((cdn) => _fetchTrackers(cdn)));
+        result.addAll(trackers);
+      } catch (e) {
+        logger.w("subscribe trackers fail, url: $u", e);
       }
     }
     btExtConfig.subscribeTrackers.clear();

ui/flutter/lib/app/modules/setting/controllers/setting_controller.dart

@@ -28,17 +28,21 @@ class SettingController extends GetxController {
   void fetchLatestVersion() async {
     String? releaseDataStr;
     try {
-      releaseDataStr =
-          (await proxyRequest("https://gopeed.com/api/release")).data;
-    } catch (e) {
       releaseDataStr = (await proxyRequest(
               "https://api.github.com/repos/GopeedLab/gopeed/releases/latest"))
           .data;
+    } catch (e) {
+      releaseDataStr =
+          (await proxyRequest("https://gopeed.com/api/release")).data;
     }
     if (releaseDataStr == null) {
       return;
     }
     final releaseData = jsonDecode(releaseDataStr);
+    final tagName = releaseData["tag_name"];
+    if (tagName == null) {
+      return;
+    }
     latestVersion.value = releaseData["tag_name"].substring(1);
   }
 }

ui/flutter/lib/util/util.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io';
 
 import 'package:flutter/foundation.dart';
@@ -59,4 +60,27 @@ class Util {
   static isWeb() {
     return kIsWeb;
   }
+
+  // if one future complete, return the result, only all future error, return the last error
+  static anyOk<T>(Iterable<Future<T>> futures) {
+    final completer = Completer<T>();
+    Object lastError;
+    var count = futures.length;
+    for (var future in futures) {
+      future.then((value) {
+        if (!completer.isCompleted) {
+          completer.complete(value);
+        }
+      }).catchError((e) {
+        lastError = e;
+        count--;
+        print(count);
+        if (count == 0) {
+          print("completeError");
+          completer.completeError(lastError);
+        }
+      });
+    }
+    return completer.future;
+  }
 }