Fixed: TMDB Failing due to missing response header (#3610)

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

@@ -86,11 +86,14 @@ namespace NzbDrone.Core.MetadataSource.SkyHook
             // The dude abides, so should us, Lets be nice to TMDb
             // var allowed = int.Parse(response.Headers.GetValues("X-RateLimit-Limit").First()); // get allowed
             // var reset = long.Parse(response.Headers.GetValues("X-RateLimit-Reset").First()); // get time when it resets
-            var remaining = int.Parse(response.Headers.GetValues("X-RateLimit-Remaining").First());
-            if (remaining <= 5)
+            if (response.Headers.ContainsKey("X-RateLimit-Remaining"))
             {
-                _logger.Trace("Waiting 5 seconds to get information for the next 35 movies");
-                Thread.Sleep(5000);
+                var remaining = int.Parse(response.Headers.GetValues("X-RateLimit-Remaining").First());
+                if (remaining <= 5)
+                {
+                    _logger.Trace("Waiting 5 seconds to get information for the next 35 movies");
+                    Thread.Sleep(5000);
+                }
             }
 
             var resource = response.Resource;
@@ -333,11 +336,14 @@ namespace NzbDrone.Core.MetadataSource.SkyHook
             // The dude abides, so should us, Lets be nice to TMDb
             // var allowed = int.Parse(response.Headers.GetValues("X-RateLimit-Limit").First()); // get allowed
             // var reset = long.Parse(response.Headers.GetValues("X-RateLimit-Reset").First()); // get time when it resets
-            var remaining = int.Parse(response.Headers.GetValues("X-RateLimit-Remaining").First());
-            if (remaining <= 5)
+            if (response.Headers.ContainsKey("X-RateLimit-Remaining"))
             {
-                _logger.Trace("Waiting 5 seconds to get information for the next 35 movies");
-                Thread.Sleep(5000);
+                var remaining = int.Parse(response.Headers.GetValues("X-RateLimit-Remaining").First());
+                if (remaining <= 5)
+                {
+                    _logger.Trace("Waiting 5 seconds to get information for the next 35 movies");
+                    Thread.Sleep(5000);
+                }
             }
 
             var resources = response.Resource;