// Proxy Configuration (proxy.config.json)
{
// Allowed referrers must contain an exact URL match use "*" to match any referrer.
"allowedReferrers": [ "*" ],
// Set use app pool identity to use the same network credentials as the app process running in IIS
"useAppPoolIdentity": false,
// Token cache time given in minutes. Should be = or < timeout returned in tokens.
"tokenCacheMinutes": 29,
// Array of root URLS to be proxied
"serverUrls": [
	// Example using IWA to authenticate with the server
	{
		"url": "https://arcgisserver.yourdomain.com/webapdater/",
		"domain": "yourdomain",
		"username": "username",
		"password": "password"
	},
	// Example using using client and client secret to get OAuth tokens.
	// Note: IWA credentials can also be passed for environments where IT has the token endpoint behind IWA.
	{
		"url": "https://arcgisportal.com/webadapter/",
		"domain": "yourdomain",
		"username": "username",
		"password": "password",
		"clientId": "clientid",
		"clientSecret": "clientsecret",
		"oauth2Endpoint": "https://arcgisserver.com/webadapter/sharing/oauth2/"
	}
]}

    // This method gets called by the runtime. Use this method to add services to the container.
	public void ConfigureServices(IServiceCollection services) {
		... Copy below this line ...
		services.AddSingleton<IProxyConfigService, ProxyConfigService>((a) => new ProxyConfigService(a.GetService<IHostingEnvironment>(), "proxy.config.json"));
		services.AddSingleton<IProxyService, ProxyService>();

		var serviceProvider = services.BuildServiceProvider();

		var agsProxyConfig = serviceProvider.GetService<IProxyConfigService>();
		// Loop through the config and add Named Clients for use with IHttpClientFactory
		agsProxyConfig.Config.ServerUrls.ToList().ForEach(su => {
			services.AddHttpClient(su.Url)
				.ConfigurePrimaryHttpMessageHandler(h => {
					return new HttpClientHandler {
						AllowAutoRedirect = false,
						Credentials = agsProxyConfig.GetCredentials(agsProxyConfig.GetProxyServerUrlConfig((su.Url)))
					};
				});
		});
		... Copy above this line ...
		services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
	}

public void Configure(IApplicationBuilder app, IHostingEnvironment env) {
	... Copy below this line ... 
	app.UseWhen(context => {
		return context.Request.Path.Value.ToLower().StartsWith(@"/proxy/proxy.ashx", StringComparison.OrdinalIgnoreCase);
		//&& context.User.Identity.IsAuthenticated; // Add this back in to keep unauthenticated users from utilzing the proxy.
	},
		builder =>
			builder.UseAgsProxyServer(
			app.ApplicationServices.GetService<IProxyConfigService>(),
			app.ApplicationServices.GetService<IProxyService>(),
			app.ApplicationServices.GetService<IMemoryCache>())
		);
	... Copy above this line ...
	app.UseMvc();
}