Add update progress steps, checksum verification, and improved cleanup

2026-09-04 00:46:05 +02:00 · 2026-02-20 20:30:13 +01:00
parent dd0d24cf47
commit e9b3fd63cc
4 changed files with 137 additions and 43 deletions
@@ -37,9 +37,9 @@ internal class Program
        }
    }

-    private static void Updater_ProgressChanged(long? totalFileSize, long totalBytesDownloaded, double? progressPercentage)
+    private static void Updater_ProgressChanged(UpdateStep step, long? totalItems, long itemsProcessed, double? progressPercentage)
    {
-        Console.WriteLine($"{totalBytesDownloaded}/{totalFileSize}  {progressPercentage}%");
+        Console.WriteLine($"[{step}] {itemsProcessed}/{totalItems}  {progressPercentage}%");
    }

    private static void Updater_NoUpdateAvailable()
@@ -6,15 +6,16 @@ using System.Linq;
 using System.Net.Http;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using System.Security.Cryptography;
+using System.Threading;
 using System.Threading.Tasks;
-using System.Timers;
 using System.Xml.Serialization;

 namespace AlwaysUpToDate
 {
    public class Updater : IDisposable
    {
-        public delegate void UpdaterChangedHandler(long? totalFileSize, long totalBytesDownloaded, double? progressPercentage);
+        public delegate void UpdaterChangedHandler(UpdateStep step, long? totalItems, long itemsProcessed, double? progressPercentage);

        public event UpdaterChangedHandler ProgressChanged;

@@ -32,11 +33,12 @@ namespace AlwaysUpToDate

        private static readonly XmlSerializer manifestSerializer = new XmlSerializer(typeof(UpdateManifest));
        private readonly HttpClient httpClient = new HttpClient();
-        private readonly Timer updateTimer = new Timer();
+        private readonly System.Timers.Timer updateTimer = new System.Timers.Timer();
        private readonly string updateInfoUrl;
        private readonly string installPath;
        private string updateUrl;
-        private bool updating;
+        private UpdateItem pendingUpdateItem;
+        private int updating;
        private bool disposed;

        public Updater(TimeSpan interval, Uri updateInfoUri, bool onlyUpdateOnce = false) : this(interval, updateInfoUri?.ToString(), "./", onlyUpdateOnce)
@@ -86,14 +88,19 @@ namespace AlwaysUpToDate
        public async Task Update()
        {
            ThrowIfDisposed();
-            if (!string.IsNullOrWhiteSpace(updateUrl) && !updating)
+            if (!string.IsNullOrWhiteSpace(updateUrl) && Interlocked.CompareExchange(ref updating, 1, 0) == 0)
            {
                await DownloadFile();
            }
        }

-        private async void UpdateTimer_Elapsed(object sender, ElapsedEventArgs e)
+        private async void UpdateTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
+            if (Interlocked.CompareExchange(ref updating, 0, 0) != 0)
+            {
+                return;
+            }
+
            try
            {
                using HttpResponseMessage response = await httpClient.GetAsync(updateInfoUrl);
@@ -110,16 +117,23 @@ namespace AlwaysUpToDate
                    return;
                }

-                Version assemblyVersion = Assembly.GetEntryAssembly().GetName().Version;
+                Assembly entryAssembly = Assembly.GetEntryAssembly();
+                if (entryAssembly == null)
+                {
+                    return;
+                }
+
+                Version assemblyVersion = entryAssembly.GetName().Version;

                if (!Version.TryParse(updateItem.Version, out Version version))
                {
                    return;
                }

-                if (version > assemblyVersion && !updating)
+                if (version > assemblyVersion && Interlocked.CompareExchange(ref updating, 0, 0) == 0)
                {
                    updateUrl = updateItem.DownloadUrl;
+                    pendingUpdateItem = updateItem;
                    if (!updateItem.IsMandatory)
                    {
                        UpdateAvailable?.Invoke(updateItem.Version, updateItem.ChangelogUrl);
@@ -165,7 +179,7 @@ namespace AlwaysUpToDate
            try
            {
                updateTimer.Stop();
-                updating = true;
+                _ = Interlocked.Exchange(ref updating, 1);

                using HttpResponseMessage response = await httpClient.GetAsync(updateUrl);
                _ = response.EnsureSuccessStatusCode();
@@ -175,6 +189,7 @@ namespace AlwaysUpToDate
            }
            catch (Exception ex)
            {
+                _ = Interlocked.Exchange(ref updating, 0);
                OnException?.Invoke(ex);
            }
        }
@@ -183,6 +198,17 @@ namespace AlwaysUpToDate
        {
            try
            {
+                string zipPath = Path.Join(installPath, "Update.zip");
+
+                TriggerProgressChanged(UpdateStep.VerifyingChecksum, null, 0);
+                if (!VerifyChecksum(zipPath))
+                {
+                    File.Delete(zipPath);
+                    _ = Interlocked.Exchange(ref updating, 0);
+                    throw new InvalidOperationException("Checksum verification failed for the downloaded update.");
+                }
+                TriggerProgressChanged(UpdateStep.VerifyingChecksum, 1, 1);
+
                string executablePath = Process.GetCurrentProcess().MainModule?.FileName ?? Assembly.GetEntryAssembly()?.Location;

                if (string.IsNullOrEmpty(executablePath))
@@ -190,25 +216,32 @@ namespace AlwaysUpToDate
                    throw new InvalidOperationException("Unable to determine the executable path.");
                }

-                using (ZipArchive zipArchive = ZipFile.OpenRead(Path.Join(installPath, "Update.zip")))
+                using (ZipArchive zipArchive = ZipFile.OpenRead(zipPath))
                {
                    string fullInstallPath = Path.GetFullPath(installPath + Path.DirectorySeparatorChar);
+                    long totalEntries = zipArchive.Entries.Count;
+                    long processedEntries = 0;

                    foreach (ZipArchiveEntry entry in zipArchive.Entries)
                    {
                        string destinationPath = Path.GetFullPath(Path.Join(installPath, entry.FullName));
                        if (!destinationPath.StartsWith(fullInstallPath, StringComparison.OrdinalIgnoreCase))
                        {
+                            processedEntries++;
                            continue;
                        }

                        if (File.Exists(Path.Join(installPath, entry.FullName)))
                        {
-                            string moveName = entry.FullName;
+                            string moveName = Path.GetFileNameWithoutExtension(entry.FullName) + "_OLD_" + Path.GetExtension(entry.FullName);
+                            int counter = 1;
+
                            while (File.Exists(Path.Join(installPath, moveName)))
                            {
-                                moveName += "_OLD_";
+                                moveName = Path.GetFileNameWithoutExtension(entry.FullName) + "_OLD_" + counter + Path.GetExtension(entry.FullName);
+                                counter++;
                            }
+
                            File.Move(Path.Join(installPath, entry.FullName), Path.Join(installPath, moveName));
                        }

@@ -223,36 +256,46 @@ namespace AlwaysUpToDate
                        {
                            entry.ExtractToFile(Path.Join(installPath, entry.FullName), true);
                        }
+
+                        processedEntries++;
+                        TriggerProgressChanged(UpdateStep.Extracting, totalEntries, processedEntries);
                    }
                }

-                foreach (string filePath in Directory.GetFiles(installPath, "*.*", SearchOption.AllDirectories))
+                string[] allFiles = Directory.GetFiles(installPath, "*.*", SearchOption.AllDirectories);
+                string[] oldFiles = Array.FindAll(allFiles, f => f.Contains("_OLD_"));
+                long totalOldFiles = oldFiles.Length;
+                long deletedFiles = 0;
+
+                foreach (string filePath in oldFiles)
                {
-                    if (filePath.Contains("_OLD_"))
+                    try
                    {
-                        try
-                        {
-                            File.Delete(filePath);
-                        }
-                        catch (Exception ex)
-                        {
-                            Debug.WriteLine(ex);
-                        }
+                        File.Delete(filePath);
                    }
+                    catch (Exception ex)
+                    {
+                        Debug.WriteLine(ex);
+                    }
+
+                    deletedFiles++;
+                    TriggerProgressChanged(UpdateStep.CleaningUp, totalOldFiles, deletedFiles);
                }

-                File.Delete(Path.Join(installPath, "Update.zip"));
+                File.Delete(zipPath);

-                //if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
-                //{
-                //    Process.Start("chmod", $"+x \"{executablePath}\"")?.WaitForExit();
-                //}
+                TriggerProgressChanged(UpdateStep.Restarting, null, 0);
+
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) || RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                {
+                    Process.Start("chmod", $"+x \"{executablePath}\"")?.WaitForExit();
+                }

                _ = Process.Start(new ProcessStartInfo(executablePath) { UseShellExecute = false });
-                Environment.Exit(0);
            }
            catch (Exception ex)
            {
+                _ = Interlocked.Exchange(ref updating, 0);
                OnException?.Invoke(ex);
            }
        }
@@ -273,7 +316,7 @@ namespace AlwaysUpToDate
                    if (bytesRead == 0)
                    {
                        isMoreToRead = false;
-                        TriggerProgressChanged(totalDownloadSize, totalBytesRead);
+                        TriggerProgressChanged(UpdateStep.Downloading, totalDownloadSize, totalBytesRead);
                        continue;
                    }

@@ -285,7 +328,7 @@ namespace AlwaysUpToDate
                    if (readCount >= 10)
                    {
                        readCount = 0;
-                        TriggerProgressChanged(totalDownloadSize, totalBytesRead);
+                        TriggerProgressChanged(UpdateStep.Downloading, totalDownloadSize, totalBytesRead);
                    }
                }
                while (isMoreToRead);
@@ -298,15 +341,42 @@ namespace AlwaysUpToDate
            }
        }

-        private void TriggerProgressChanged(long? totalDownloadSize, long totalBytesRead)
+        private bool VerifyChecksum(string filePath)
        {
-            double? progressPercentage = null;
-            if (totalDownloadSize.HasValue)
+            UpdateItem item = pendingUpdateItem;
+            if (item?.Checksum == null || string.IsNullOrWhiteSpace(item.Checksum.Value))
            {
-                progressPercentage = Math.Round((double)totalBytesRead / totalDownloadSize.Value * 100, 2);
+                return true;
            }

-            ProgressChanged?.Invoke(totalDownloadSize, totalBytesRead, progressPercentage);
+            using HashAlgorithm algorithm = CreateHashAlgorithm(item.Checksum.Algorithm);
+            using FileStream stream = File.OpenRead(filePath);
+            byte[] hash = algorithm.ComputeHash(stream);
+            string hashString = BitConverter.ToString(hash).Replace("-", "");
+            return string.Equals(hashString, item.Checksum.Value, StringComparison.OrdinalIgnoreCase);
+        }
+
+        private static HashAlgorithm CreateHashAlgorithm(HashAlgorithmType algorithm)
+        {
+            return algorithm switch
+            {
+                HashAlgorithmType.MD5 => MD5.Create(),
+                HashAlgorithmType.SHA256 => SHA256.Create(),
+                HashAlgorithmType.SHA512 => SHA512.Create(),
+                HashAlgorithmType.SHA1 => SHA1.Create(),
+                _ => throw new NotSupportedException($"Hash algorithm '{algorithm}' is not supported."),
+            };
+        }
+
+        private void TriggerProgressChanged(UpdateStep step, long? totalSize, long totalProcessed)
+        {
+            double? progressPercentage = null;
+            if (totalSize.HasValue && totalSize.Value > 0)
+            {
+                progressPercentage = Math.Round((double)totalProcessed / totalSize.Value * 100, 2);
+            }
+
+            ProgressChanged?.Invoke(step, totalSize, totalProcessed, progressPercentage);
        }

        private void ThrowIfDisposed()
@@ -31,10 +31,25 @@ namespace AlwaysUpToDate
        public Checksum Checksum { get; set; }
    }

+    public enum HashAlgorithmType
+    {
+        [XmlEnum("sha1")]
+        SHA1,
+
+        [XmlEnum("md5")]
+        MD5,
+
+        [XmlEnum("sha256")]
+        SHA256,
+
+        [XmlEnum("sha512")]
+        SHA512,
+    }
+
    public class Checksum
    {
        [XmlAttribute("algorithm")]
-        public string Algorithm { get; set; }
+        public HashAlgorithmType Algorithm { get; set; }

        [XmlText]
        public string Value { get; set; }
@@ -51,4 +66,13 @@ namespace AlwaysUpToDate
        [XmlEnum("linux")]
        Linux,
    }
+
+    public enum UpdateStep
+    {
+        Downloading,
+        VerifyingChecksum,
+        Extracting,
+        CleaningUp,
+        Restarting,
+    }
 }
@@ -57,7 +57,7 @@ private static void Updater_UpdateAvailible(string version, string additionalInf
 {
 }

-private static void Updater_ProgressChanged(long? totalFileSize, long totalBytesDownloaded, double? progressPercentage)
+private static void Updater_ProgressChanged(UpdateStep step, long? totalItems, long itemsProcessed, double? progressPercentage)
 {  
 }
 ```
@@ -74,10 +74,10 @@ private static void Updater_UpdateAvailible(string version, string additionalInf
        updater.Update();
 }
 ```
-### Download process reporting
+### Update process reporting
 ```cs
-private static void Updater_ProgressChanged(long? totalFileSize, long totalBytesDownloaded, double? progressPercentage)
+private static void Updater_ProgressChanged(UpdateStep step, long? totalItems, long itemsProcessed, double? progressPercentage)
 {
-    Console.WriteLine($"{totalBytesDownloaded}/{totalFileSize}  {progressPercentage}%");
+    Console.WriteLine($"[{step}] {itemsProcessed}/{totalItems}  {progressPercentage}%");
 }
 ```