Fixed: Posters not always showing when searching for new shows

src/NzbDrone.Core/MediaCover/MediaCoverProxy.cs

@@ -0,0 +1,66 @@
+using NzbDrone.Common.Cache;
+using NzbDrone.Common.Http;
+using NzbDrone.Core.Configuration;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NzbDrone.Core.MediaCover
+{
+    public interface IMediaCoverProxy
+    {
+        string RegisterUrl(string url);
+
+        string GetUrl(string hash);
+        byte[] GetImage(string hash);
+    }
+    public class MediaCoverProxy : IMediaCoverProxy
+    {
+        private readonly IHttpClient _httpClient;
+        private readonly IConfigFileProvider _configFileProvider;
+        private readonly ICached<string> _cache;
+
+        public MediaCoverProxy(IHttpClient httpClient, IConfigFileProvider configFileProvider, ICacheManager cacheManager)
+        {
+            _httpClient = httpClient;
+            _configFileProvider = configFileProvider;
+            _cache = cacheManager.GetCache<string>(GetType());
+        }
+
+        public string RegisterUrl(string url)
+        {
+            var hash = url.SHA256Hash();
+
+            _cache.Set(hash, url, TimeSpan.FromHours(24));
+
+            _cache.ClearExpired();
+
+            var fileName = Path.GetFileName(url);
+            return _configFileProvider.UrlBase + @"/MediaCoverProxy/" + hash + "/" + fileName;
+        }
+
+        public string GetUrl(string hash)
+        {
+            var result = _cache.Find(hash);
+
+            if (result == null)
+            {
+                throw new KeyNotFoundException("Url no longer in cache");
+            }
+
+            return result;
+        }
+
+        public byte[] GetImage(string hash)
+        {
+            var url = GetUrl(hash);
+
+            var request = new HttpRequest(url);
+            
+            return _httpClient.Get(request).ResponseData;
+        }
+    }
+}

src/NzbDrone.Core/MediaCover/MediaCoverService.cs

@@ -26,6 +26,7 @@ namespace NzbDrone.Core.MediaCover
         IHandleAsync<SeriesDeletedEvent>,
         IMapCoversToLocal
     {
+        private readonly IMediaCoverProxy _mediaCoverProxy;
         private readonly IImageResizer _resizer;
         private readonly IHttpClient _httpClient;
         private readonly IDiskProvider _diskProvider;
@@ -40,7 +41,8 @@ namespace NzbDrone.Core.MediaCover
         // So limit the number of concurrent resizing tasks
         private static SemaphoreSlim _semaphore = new SemaphoreSlim((int)Math.Ceiling(Environment.ProcessorCount / 2.0));
 
-        public MediaCoverService(IImageResizer resizer,
+        public MediaCoverService(IMediaCoverProxy mediaCoverProxy,
+                                 IImageResizer resizer,
                                  IHttpClient httpClient,
                                  IDiskProvider diskProvider,
                                  IAppFolderInfo appFolderInfo,
@@ -49,6 +51,7 @@ namespace NzbDrone.Core.MediaCover
                                  IEventAggregator eventAggregator,
                                  Logger logger)
         {
+            _mediaCoverProxy = mediaCoverProxy;
             _resizer = resizer;
             _httpClient = httpClient;
             _diskProvider = diskProvider;
@@ -68,6 +71,16 @@ namespace NzbDrone.Core.MediaCover
         }
 
         public void ConvertToLocalUrls(int seriesId, IEnumerable<MediaCover> covers)
+        {
+            if (seriesId == 0)
+            {
+                // Series isn't in Sonarr yet, map via a proxy to circument referrer issues
+                foreach (var mediaCover in covers)
+                {
+                    mediaCover.Url = _mediaCoverProxy.RegisterUrl(mediaCover.Url);
+                }
+            }
+            else
             {
                 foreach (var mediaCover in covers)
                 {
@@ -82,6 +95,7 @@ namespace NzbDrone.Core.MediaCover
                     }
                 }
             }
+        }
 
         private string GetSeriesCoverPath(int seriesId)
         {

src/NzbDrone.Core/MetadataSource/SkyHook/SkyHookProxy.cs

@@ -100,7 +100,7 @@ namespace NzbDrone.Core.MetadataSource.SkyHook
 
                 var httpResponse = _httpClient.Get<List<ShowResource>>(httpRequest);
 
-                return httpResponse.Resource.SelectList(MapSearhResult);
+                return httpResponse.Resource.SelectList(MapSearchResult);
             }
             catch (HttpException)
             {
@@ -113,7 +113,7 @@ namespace NzbDrone.Core.MetadataSource.SkyHook
             }
         }
 
-        private Series MapSearhResult(ShowResource show)
+        private Series MapSearchResult(ShowResource show)
         {
             var series = _seriesService.FindByTvdbId(show.TvdbId);
 

src/Sonarr.Api.V3/Series/SeriesLookupModule.cs

@@ -13,12 +13,14 @@ namespace Sonarr.Api.V3.Series
     {
         private readonly ISearchForNewSeries _searchProxy;
         private readonly IBuildFileNames _fileNameBuilder;
+        private readonly IMapCoversToLocal _coverMapper;
 
-        public SeriesLookupModule(ISearchForNewSeries searchProxy, IBuildFileNames fileNameBuilder)
+        public SeriesLookupModule(ISearchForNewSeries searchProxy, IBuildFileNames fileNameBuilder, IMapCoversToLocal coverMapper)
             : base("/series/lookup")
         {
             _searchProxy = searchProxy;
             _fileNameBuilder = fileNameBuilder;
+            _coverMapper = coverMapper;
             Get("/",  x => Search());
         }
 
@@ -33,6 +35,9 @@ namespace Sonarr.Api.V3.Series
             foreach (var currentSeries in series)
             {
                 var resource = currentSeries.ToResource();
+
+                _coverMapper.ConvertToLocalUrls(resource.Id, resource.Images);
+
                 var poster = currentSeries.Images.FirstOrDefault(c => c.CoverType == MediaCoverTypes.Poster);
 
                 if (poster != null)

src/Sonarr.Http/Frontend/Mappers/MediaCoverMapper.cs

@@ -43,7 +43,7 @@ namespace Sonarr.Http.Frontend.Mappers
 
         public override bool CanHandle(string resourceUrl)
         {
-            return resourceUrl.StartsWith("/MediaCover", StringComparison.InvariantCultureIgnoreCase);
+            return resourceUrl.StartsWith("/MediaCover/", StringComparison.InvariantCultureIgnoreCase);
         }
     }
 }

src/Sonarr.Http/Frontend/Mappers/MediaCoverProxyMapper.cs

@@ -0,0 +1,48 @@
+using System;
+using System.IO;
+using System.Text.RegularExpressions;
+using Nancy;
+using Nancy.Responses;
+using NzbDrone.Core.MediaCover;
+
+namespace Sonarr.Http.Frontend.Mappers
+{
+    public class MediaCoverProxyMapper : IMapHttpRequestsToDisk
+    {
+        private readonly Regex _regex = new Regex(@"/MediaCoverProxy/(?<hash>\w+)/(?<filename>(.+)\.(jpg|png|gif))");
+
+        private readonly IMediaCoverProxy _mediaCoverProxy;
+
+        public MediaCoverProxyMapper(IMediaCoverProxy mediaCoverProxy)
+        {
+            _mediaCoverProxy = mediaCoverProxy;
+        }
+
+        public string Map(string resourceUrl)
+        {
+            return null;
+        }
+
+        public bool CanHandle(string resourceUrl)
+        {
+            return resourceUrl.StartsWith("/MediaCoverProxy/", StringComparison.InvariantCultureIgnoreCase);
+        }
+
+        public Response GetResponse(string resourceUrl)
+        {
+            var match = _regex.Match(resourceUrl);
+
+            if (!match.Success)
+            {
+                return new NotFoundResponse();
+            }
+
+            var hash = match.Groups["hash"].Value;
+            var filename = match.Groups["filename"].Value;
+
+            var imageData = _mediaCoverProxy.GetImage(hash);
+
+            return new StreamResponse(() => new MemoryStream(imageData), MimeTypes.GetMimeType(filename));
+        }
+    }
+}