Try to download the download assistant by default

Author: Legi428

UnityLauncherPro/GetUnityUpdates.cs

@@ -18,7 +18,7 @@ public static class GetUnityUpdates
         private const int DelayBetweenBatches = 1000; // 1 second in milliseconds
         private const string CacheFileName = "UnityVersionCache.json";
 
-        private static readonly HttpClient httpClient = new HttpClient();
+        private static readonly HttpClient Client = new HttpClient();
 
         public static async Task<List<UnityVersion>> FetchAll()
         {
@@ -37,7 +37,7 @@ public static async Task<List<UnityVersion>> FetchAll()
             return allVersions;
         }
 
-        public static async Task<string> FetchDownloadUrl(string unityVersion, bool assistantUrl = false)
+        public static async Task<string> FetchDownloadUrl(string unityVersion)
     {
         if (string.IsNullOrEmpty(unityVersion))
         {
@@ -48,7 +48,7 @@ public static async Task<string> FetchDownloadUrl(string unityVersion, bool assi
 
         try
         {
-            string responseString = await httpClient.GetStringAsync(apiUrl);
+            string responseString = await Client.GetStringAsync(apiUrl);
             JsonDocument doc = JsonDocument.Parse(responseString);
             try
             {
@@ -75,21 +75,37 @@ public static async Task<string> FetchDownloadUrl(string unityVersion, bool assi
 
                     if (!string.IsNullOrEmpty(downloadUrl))
                     {
-                        if (!assistantUrl) return downloadUrl;
-
                         if (!string.IsNullOrEmpty(shortRevision))
                         {
                             var startIndex = downloadUrl.LastIndexOf(shortRevision, StringComparison.Ordinal) + shortRevision.Length + 1;
                             var endIndex = downloadUrl.Length - startIndex;
-                            return downloadUrl.Replace(downloadUrl.Substring(startIndex, endIndex), 
+                            var assistantUrl = downloadUrl.Replace(downloadUrl.Substring(startIndex, endIndex), 
                                 $"UnityDownloadAssistant-{unityVersion}.exe");
+                            using (var assistantResponse = await Client.GetAsync(assistantUrl))
+                            {
+                                if (assistantResponse.IsSuccessStatusCode)
+                                {
+                                    Console.WriteLine("Assistant download URL found.");
+                                    return assistantUrl;
+                                }
+                                else
+                                {
+                                    Console.WriteLine("Assistant download URL not found, returning original download URL.");
+                                    return downloadUrl;
+                                }
+                            }
                         }
                         else
                         {
                             Console.WriteLine("ShortRevision not found, returning original download URL.");
                             return downloadUrl;
                         }
                     }
+                    else
+                    {
+                        Console.WriteLine("No download URL found.");
+                        return downloadUrl;
+                    }
                 }
 
                 Console.WriteLine($"No download URL found for version {unityVersion}");
@@ -145,7 +161,7 @@ private static async Task<UnityVersionResponse> FetchBatch(int offset)
 
             try
             {
-                var response = await httpClient.GetStringAsync(url);
+                var response = await Client.GetStringAsync(url);
                 return JsonSerializer.Deserialize<UnityVersionResponse>(response);
             }
             catch (Exception e)

UnityLauncherPro/MainWindow.xaml.cs

@@ -1517,7 +1517,7 @@ private void BtnDownloadInBrowser_Click(object sender, RoutedEventArgs e)
         private void BtnDownloadInBrowserFull_Click(object sender, RoutedEventArgs e)
         {
             var unity = GetSelectedUpdate();
-            Tools.DownloadInBrowser(unity?.Version, true);
+            Tools.DownloadInBrowser(unity?.Version);
         }
 
         private void btnDownloadInstallUpdate_Click(object sender, RoutedEventArgs e)

UnityLauncherPro/Tools.cs

@@ -659,14 +659,14 @@ public static void OpenURL(string url)
             Process.Start(url);
         }
 
-        public static async void DownloadInBrowser(string version, bool preferFullInstaller = false)
+        public static async void DownloadInBrowser(string version)
         {
             if (version == null) return;
-            string exeURL = await GetUnityUpdates.FetchDownloadUrl(version, preferFullInstaller);
+            string exeURL = await GetUnityUpdates.FetchDownloadUrl(version);
 
             Console.WriteLine("DownloadInBrowser exeURL= '" + exeURL + "'");
 
-            if (string.IsNullOrEmpty(exeURL) == false && exeURL.StartsWith("https") == true)
+            if (string.IsNullOrEmpty(exeURL) == false && exeURL.StartsWith("https"))
             {
                 //SetStatus("Download installer in browser: " + exeURL);
                 Process.Start(exeURL);
@@ -2255,7 +2255,10 @@ private static async Task<bool> DownloadFileAsync(string fileUrl, string destina
             }
             finally
             {
-                DeleteTempFile(destinationPath);
+                if (!result)
+                {
+                    DeleteTempFile(destinationPath);
+                }
                 progressWindow.Close();
             }
             return result;

UnityLauncherPro/UpgradeWindow.xaml.cs

@@ -78,7 +78,7 @@ private void BtnOpenReleasePage_Click(object sender, RoutedEventArgs e)
 
         private void BtnDownloadEditor_Click(object sender, RoutedEventArgs e)
         {
-            Tools.DownloadInBrowser(txtCurrentVersion.Text, true);
+            Tools.DownloadInBrowser(txtCurrentVersion.Text);
         }
 
         private void BtnDownload_Click(object sender, RoutedEventArgs e)