Added: Make Lidarr CSP compatible

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

src/Lidarr.Http/Frontend/InitializeJsModule.cs

@@ -0,0 +1,54 @@
+using System.IO;
+using Nancy;
+using Nancy.Responses;
+using NzbDrone.Common.EnvironmentInfo;
+using NzbDrone.Core.Analytics;
+using NzbDrone.Core.Configuration;
+
+namespace Lidarr.Http.Frontend
+{
+    public class InitializeJsModule : NancyModule
+    {
+        private readonly IConfigFileProvider _configFileProvider;
+        private readonly IAnalyticsService _analyticsService;
+
+
+        public InitializeJsModule(IConfigFileProvider configFileProvider,
+                                  IAnalyticsService analyticsService)
+        {
+            _configFileProvider = configFileProvider;
+            _analyticsService = analyticsService;
+
+            Get["/initialize.js"] = x => Index();
+        }
+
+        private Response Index()
+        {
+            // TODO: Move away from window.Lidarr and prefetch the information returned here when starting the UI
+            return new StreamResponse(GetContentStream, "application/javascript");
+        }
+
+        private Stream GetContentStream()
+        {
+            var urlBase = _configFileProvider.UrlBase;
+            var stream = new MemoryStream();
+            var writer = new StreamWriter(stream);
+
+            writer.WriteLine("window.Lidarr = {");
+            writer.WriteLine($"  apiRoot: '{urlBase}/api/v1',");
+            writer.WriteLine($"  apiKey: '{_configFileProvider.ApiKey}',");
+            writer.WriteLine($"  release: '{BuildInfo.Release}',");
+            writer.WriteLine($"  version: '{BuildInfo.Version.ToString()}',");
+            writer.WriteLine($"  branch: '{_configFileProvider.Branch.ToLower()}',");
+            writer.WriteLine($"  analytics: {_analyticsService.IsEnabled.ToString().ToLowerInvariant()},");
+            writer.WriteLine($"  urlBase: '{urlBase}',");
+            writer.WriteLine($"  isProduction: {RuntimeInfo.IsProduction.ToString().ToLowerInvariant()}");
+            writer.WriteLine("};");
+
+            writer.Flush();
+            stream.Position = 0;
+
+            return stream;
+        }
+    }
+}