Fixed: Mask-icon and other resources when UrlBase is in use (#1933)

src/NzbDrone.Api/Frontend/Mappers/IndexHtmlMapper.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 using System.Text.RegularExpressions;
 using Nancy;
@@ -17,7 +17,7 @@ namespace NzbDrone.Api.Frontend.Mappers
         private readonly IAnalyticsService _analyticsService;
         private readonly Func<ICacheBreakerProvider> _cacheBreakProviderFactory;
         private readonly string _indexPath;
-        private static readonly Regex ReplaceRegex = new Regex(@"(?:(?<attribute>href|src)=\"")(?<path>.*?(?<extension>css|js|png|ico|ics))(?:\"")(?:\s(?<nohash>data-no-hash))?", RegexOptions.Compiled | RegexOptions.IgnoreCase);
+        private static readonly Regex ReplaceRegex = new Regex(@"(?:(?<attribute>href|src|content)=\"")(?<path>.*?(?<extension>css|js|png|ico|ics|svg|json|xml))(?:\"")(?:\s(?<nohash>data-no-hash))?", RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         private static string API_KEY;
         private static string URL_BASE;