Setup Proxy for Xamarin development

The short collection of fast steps about setup HTTP Proxying for iOS and Android development with Xamarin

Charles Proxy

• Setup for Android: The Android Emulator and Charles Proxy: A Love Story
• Setup for iOS: https://medium.com/@wcoder/charles-proxy-setup-for-ios-3c8cb69cd69
• More: Charles Proxy Mobile Guide

Fiddler

• Inspecting your app’s traffic with Fiddler
• Fiddler Android notes

Xamarin specific

1. If you use the native (AndroidClientHandler, NSUrlSession) HTTP handler, then nothing needs to be done.
2. If you use HTTP handler by default (managed), follow above:

Setup the proxy with a custom HttpClientHandler:

var handler = new HttpClientHandler
{
    // local ip, charles port
    Proxy = new WebProxy("192.168.0.52", 8888) 
};

Then use it whenever you create an HttpClient in your app

var client = new HttpClient(handler);
// TODO: make some requests to test charles!

More resources

• How to use Charles Proxy in Xamarin to capture network traffic (including SSL)
• Debugging Your REST Service From Your Emulator/Device Using SharpProxy