Document how to connect from a mobile app to local web app in the same solution

[Rick-Anderson]

Moved from #3746
@danroth27 wrote:

We should update this article with more detailed steps on how to connect from the mobile app emulator to the web api when both are in the same solution. Ex. with the Android emulator you use IP address 10.0.2.2 and you need to update your IIS Express site bindings to allow the request through. We should also figure out what the steps are for iOS or UWP.

Nov 2019 6K PV

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Document Details

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• ID: bdbdf1ed-c52a-3be8-1f41-aecbdab0883b
• Version Independent ID: d06996cc-14aa-96e2-fd62-9d5bbc059107
• Content: Create backend services for native mobile apps with ASP.NET Core
• Content Source: aspnetcore/mobile/native-mobile-backend.md
• Product: aspnet-core
• GitHub Login: @ardalis
• Microsoft Alias: riande

[Rick-Anderson]

In the past had problems on Windows with VS. I ran into issues with getting the emulators to allow connections to localhost on the host machine. I also remember hitting issues with dealing with HTTPS, where the request fails because the mobile app doesn’t trust the certificate used by web app during development.

. Contacts: Jimmy Garrido

file -> new and add web api backend should add this for you automatically.

For Android you need to toggle a few things to loopback: https://github.com/jamesmontemagno/MotzCodesLive/blob/master/Twitch-SignalRSaturdays/XamChat/XamChat/ViewModel/ChatViewModel.cs#L53-L55

[conceptdev]

Circling back... we got a first-cut article up to help customers get HTTPS connections to local services for testing from Android & iOS emulators/simulators:

https://docs.microsoft.com/en-us/xamarin/cross-platform/deploy-test/connect-to-local-web-services

We've already identified that we could include more specific instructions on configuring IIS Express, so there'll be another update soon.