sanity checks @ startup

Yavsc/Startup/Startup.SanityChecks.cs

@@ -0,0 +1,47 @@
+using System;
+using Google.Apis.Auth.OAuth2;
+using Microsoft.AspNet.Builder;
+using Microsoft.AspNet.Hosting;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
+
+
+namespace Yavsc
+{
+    public partial class Startup
+    {
+        public void CheckServices(IServiceCollection services)
+        {
+            
+        }
+
+        public void CheckApp(IApplicationBuilder app,
+                SiteSettings siteSettings, IHostingEnvironment env,
+                ILoggerFactory loggerFactory
+                )
+        {
+            var logger = loggerFactory.CreateLogger<Startup>();
+
+            var creds = GoogleSettings?.Account?.private_key;
+            if (creds==null)
+              throw new InvalidOperationException("No Google API credential");
+            var initializer = new ServiceAccountCredential.Initializer(Startup.GoogleSettings.Account.client_email);
+            initializer = initializer.FromPrivateKey(Startup.GoogleSettings.Account.private_key);
+            if (initializer==null)
+
+              throw new InvalidOperationException("Invalid Google API credential");
+            
+            foreach (var feature in app.ServerFeatures) 
+            {
+                var val = JsonConvert.SerializeObject(feature.Value);
+                 logger.LogInformation( $"#Feature _{feature.Key}_: {val}" );
+            }
+            foreach (var prop in app.Properties) 
+            {
+                var val = JsonConvert.SerializeObject(prop.Value);
+                 logger.LogInformation( $"#Property _{prop.Key}_: {val}" );
+            }
+        }
+    }
+}