Disable/Skip CompressionHandler when NSUrlSessionHandler is used as final handler.

[peombwa]

Issue

NSUrlSessionHandler - Xamarin.iOS - handles decompression out of the box and doesn't provide an option to turn it off. This throws a System.IO.IOException: Corrupted data ReadInternal exception when our CompressionHandler is used alongside NSUrlSessionHandler as described in issue #413.

Workaround

The current work around involves creating a new pipeline without the CompressionHandler.

#if __IOS__
            var innerHandler = new NSUrlSessionHandler { AllowAutoRedirect = false };
            var handlers = GraphClientFactory.CreateDefaultHandlers(authProvider);
            // Remove CompressionHandler from pipeline when using NSUrlSessionHandler.
            handlers.Remove(handlers.FirstOrDefault((h) => h.GetType().Equals(typeof(CompressionHandler)))); // We need to provide a method to remove handlers by type. 
            var pipeline = GraphClientFactory.CreatePipeline(handlers , innerHandler);
            httpProvider = new HttpProvider(pipeline, true, new Serializer());

[peombwa]

This has been fixed in https://www.nuget.org/packages/Microsoft.Graph.Core/1.16.0-preview.2.

[tipa]

It looks like it still throws an System.IO.IOException: Corrupted data ReadInternal on iOS when using Microsoft.Graph.Core v1.16.0-preview.2 & Microsoft.Graph v1.15.0

[peombwa]

Thanks for the feedback. I'll try and repro it on my end. Are you using a custom HttpProvider by any chance?

[tipa]

No, I was calling the new GraphServiceClient(baseUrl, authenticationProvider) constructor without using the httpProvider parameter

[peombwa]

@tipa, I have been able to repro the exception and we've released https://www.nuget.org/packages/Microsoft.Graph.Core/1.16.0-preview.3 to fix it. Our CompressionHandler was still present in the middleware pipeline, and this fix skips it when creating a new middleware pipeline on Xamarin.iOS.