Fix caching transport with attachments

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- Fix caching transport with attachments ([#1489](https://github.com/getsentry/sentry-dotnet/pull/1489))
+
 ## 3.14.0
 
 ### Features

src/Sentry/Internal/Http/CachingTransport.cs

@@ -163,7 +163,13 @@ private async Task InnerProcessCacheAsync(string file, CancellationToken cancell
         {
             _options.LogDebug("Reading cached envelope: {0}", file);
 
-            using (var envelope = await ReadEnvelope(file, cancellation).ConfigureAwait(false))
+            var stream = File.OpenRead(file);
+#if NET461 || NETSTANDARD2_0
+            using (stream)
+#else
+            await using (stream.ConfigureAwait(false))
+#endif
+            using (var envelope = await Envelope.DeserializeAsync(stream, cancellation).ConfigureAwait(false))
             {
                 try
                 {
@@ -224,19 +230,6 @@ private void LogFailureWithDiscard(string file, Exception ex)
             }
         }
 
-        private static async Task<Envelope> ReadEnvelope(string file, CancellationToken cancellation)
-        {
-            var stream = File.OpenRead(file);
-#if NET461 || NETSTANDARD2_0
-            using (stream)
-#else
-            await using (stream.ConfigureAwait(false))
-#endif
-            {
-                return await Envelope.DeserializeAsync(stream, cancellation).ConfigureAwait(false);
-            }
-        }
-
         // Loading an Envelope only reads the headers. The payload is read lazily, so we do
         // Disk -> Network I/O via stream directly instead of loading the whole file in memory.
         private static bool IsNetworkRelated(Exception exception) =>

test/Sentry.Tests/Internals/Http/CachingTransportTests.cs

@@ -15,6 +15,61 @@ public CachingTransportTests(ITestOutputHelper testOutputHelper)
         _logger = new TestOutputDiagnosticLogger(testOutputHelper);
     }
 
+    [Fact(Timeout = 7000)]
+    public async Task WithAttachment()
+    {
+        // Arrange
+        using var cacheDirectory = new TempDirectory();
+        var options = new SentryOptions
+        {
+            Dsn = DsnSamples.ValidDsnWithoutSecret,
+            DiagnosticLogger = _logger,
+            Debug = true,
+            CacheDirectoryPath = cacheDirectory.Path
+        };
+
+        Exception exception = null;
+        var innerTransport = new HttpTransport(options, new HttpClient(new CallbackHttpClientHandler(message =>
+         {
+             try
+             {
+                 message.Content!.ReadAsStringAsync().GetAwaiter().GetResult();
+             }
+             catch (Exception readStreamException)
+             {
+                 exception = readStreamException;
+             }
+         })));
+        await using var transport = new CachingTransport(innerTransport, options);
+
+        var tempFile = Path.GetTempFileName();
+
+        try
+        {
+            var attachment = new Attachment(AttachmentType.Default, new FileAttachmentContent(tempFile), "Attachment.txt", null);
+            using var envelope = Envelope.FromEvent(new SentryEvent(), attachments: new[] { attachment });
+
+            // Act
+            await transport.SendEnvelopeAsync(envelope);
+
+            // Wait until directory is empty
+            while (Directory.EnumerateFiles(cacheDirectory.Path, "*", SearchOption.AllDirectories).Any() && exception == null)
+            {
+                await Task.Delay(100);
+            }
+
+            // Assert
+            if (exception != null)
+            {
+                throw exception;
+            }
+        }
+        finally
+        {
+            File.Delete(tempFile);
+        }
+    }
+
     [Fact(Timeout = 7000)]
     public async Task WorksInBackground()
     {