Improve subscription update

v2rayN/v2rayN/Base/HttpClientHelper.cs

@@ -45,17 +45,9 @@ namespace v2rayN.Base
             {
                 return null;
             }
-            try
+            HttpResponseMessage response = await httpClient.GetAsync(url);
-            {
-                HttpResponseMessage response = await httpClient.GetAsync(url);
 
-                return await response.Content.ReadAsStringAsync();
+            return await response.Content.ReadAsStringAsync();
-            }
-            catch (Exception ex)
-            {
-                Utils.SaveLog("GetAsync", ex);
-            }
-            return null;
         }
         public async Task<string> GetAsync(HttpClient client, string url, CancellationToken token)
         {
@@ -63,16 +55,12 @@ namespace v2rayN.Base
             {
                 return null;
             }
-            try
+            HttpResponseMessage response = await client.GetAsync(url, token);
+            if (!response.IsSuccessStatusCode)
             {
-                HttpResponseMessage response = await client.GetAsync(url, token);
+                throw new Exception(string.Format("The request returned with HTTP status code {0}", response.StatusCode));
-                return await response.Content.ReadAsStringAsync();
             }
-            catch (Exception ex)
+            return await response.Content.ReadAsStringAsync();
-            {
-                Utils.SaveLog("GetAsync", ex);
-            }
-            return null;
         }
 
         public async Task PutAsync(string url, Dictionary<string, string> headers)

v2rayN/v2rayN/Handler/DownloadHandle.cs

@@ -166,6 +166,7 @@ namespace v2rayN.Handler
             catch (Exception ex)
             {
                 Utils.SaveLog(ex.Message, ex);
+                Error?.Invoke(this, new ErrorEventArgs(ex));
             }
             return null;
         }

v2rayN/v2rayN/Handler/UpdateHandle.cs

@@ -198,20 +198,31 @@ namespace v2rayN.Handler
                         continue;
                     }
 
+                    var downloadHandle = new DownloadHandle();
+                    downloadHandle.Error += (sender2, args) =>
+                    {
+                        _updateFunc(false, $"{hashCode}{args.GetException().Message}");
+                    };
+
                     _updateFunc(false, $"{hashCode}{ResUI.MsgStartGettingSubscriptions}");
-                    var result = await (new DownloadHandle()).DownloadStringAsync(url, blProxy, userAgent);
+                    var result = await downloadHandle.DownloadStringAsync(url, blProxy, userAgent);
                     if (blProxy && Utils.IsNullOrEmpty(result))
                     {
-                        result = await (new DownloadHandle()).DownloadStringAsync(url, false, userAgent);
+                        result = await downloadHandle.DownloadStringAsync(url, false, userAgent);
                     }
 
-                    _updateFunc(false, $"{hashCode}{ResUI.MsgGetSubscriptionSuccessfully}");
                     if (Utils.IsNullOrEmpty(result))
                     {
                         _updateFunc(false, $"{hashCode}{ResUI.MsgSubscriptionDecodingFailed}");
                     }
                     else
                     {
+                        _updateFunc(false, $"{hashCode}{ResUI.MsgGetSubscriptionSuccessfully}");
+                        if (result.Length < 99)
+                        {
+                            _updateFunc(false, $"{hashCode}{result}");
+                        }
+
                         int ret = ConfigHandler.AddBatchServers(ref config, result, id, groupId);
                         _updateFunc(false,
                             ret > 0