How to add attachment to unhandled exception in MAUI?

[lubiepomaranczki]

Hello there,
I am playing a bit with Sentry to check if we can replace AppCenter with Sentry.

I am wondering what is the best approach to add Attachment to unhandled exception?

Let's say that once unhandled exception happens, I would like to add additional logs as attachment.

I found out, that you could configure scope globally during setup

.UseSentry(options =>
{
    options.ConfigureScope(scope =>
    {
        var bytes = GetMyLogs();
        if (bytes != null)
        {
            var attachment = new SentryAttachment(
                AttachmentType.Default, 
                new ByteAttachmentContent(bytes),
                $"mobile_log_{Guid.NewGuid()}.zip", 
                "application/zip");

            scope.AddAttachment(attachment);
        }
    });

but this is not ideal, as those are added every time sentry is being used. What's more, the logs from the current session wan I also didn't find way to filter this only for exceptions.

EDIT: It happened that this is not the way as this is only configured on startup. Hence, this will get latest logs and add those as attachment. When the error happens, this won't get latest logs but it will use those from startup.

How do you do this?

[bitsandfoxes]

Hey there! I think you're looking for the BeforeSend callback. The callback provides a Hint object that takes paths as attachments that then get added to the event during later stages of eventprocessing.
It'd look a bit like this

.UseSentry(options =>
{
    options.SetBeforeSend((sentryEvent, hint) =>
    {
        hint.AddAttachment("path/to/my/logs.log");
        return sentryEvent;
    });
});

[lubiepomaranczki]

That's a perfect tip! Thanks a lot! 🎉