Prevent queue/history from blowing up

src/NzbDrone.Core/Download/Clients/Nzbget/Nzbget.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using NLog;
 using NzbDrone.Core.Messaging.Commands;
 using NzbDrone.Core.Parser;
@@ -42,9 +43,21 @@ namespace NzbDrone.Core.Download.Clients.Nzbget
 
         public override IEnumerable<QueueItem> GetQueue()
         {
-            var items = _proxy.GetQueue(Settings);
+            List<NzbgetQueueItem> queue;
 
-            foreach (var nzbGetQueueItem in items)
+            try
+            {
+                queue = _proxy.GetQueue(Settings);
+            }
+            catch (DownloadClientException ex)
+            {
+                _logger.ErrorException(ex.Message, ex);
+                return Enumerable.Empty<QueueItem>();
+            }
+
+            var queueItems = new List<QueueItem>();
+
+            foreach (var nzbGetQueueItem in queue)
             {
                 var queueItem = new QueueItem();
                 queueItem.Id = nzbGetQueueItem.NzbId.ToString();
@@ -60,9 +73,10 @@ namespace NzbDrone.Core.Download.Clients.Nzbget
                 if (remoteEpisode.Series == null) continue;
 
                 queueItem.RemoteEpisode = remoteEpisode;
-
-                yield return queueItem;
+                queueItems.Add(queueItem);
             }
+
+            return queueItems;
         }
 
         public override IEnumerable<HistoryItem> GetHistory(int start = 0, int limit = 10)

src/NzbDrone.Core/Download/Clients/Sabnzbd/Sabnzbd.cs

@@ -60,11 +60,21 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
         {
             return _queueCache.Get("queue", () =>
             {
-                var sabQueue = _sabnzbdProxy.GetQueue(0, 0, Settings).Items;
+                SabnzbdQueue sabQueue;
+
+                try
+                {
+                    sabQueue = _sabnzbdProxy.GetQueue(0, 0, Settings);
+                }
+                catch (DownloadClientException ex)
+                {
+                    _logger.ErrorException(ex.Message, ex);
+                    return Enumerable.Empty<QueueItem>();
+                }
 
                 var queueItems = new List<QueueItem>();
 
-                foreach (var sabQueueItem in sabQueue)
+                foreach (var sabQueueItem in sabQueue.Items)
                 {
                     var queueItem = new QueueItem();
                     queueItem.Id = sabQueueItem.Id;
@@ -91,10 +101,21 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
 
         public override IEnumerable<HistoryItem> GetHistory(int start = 0, int limit = 10)
         {
-            var items = _sabnzbdProxy.GetHistory(start, limit, Settings).Items;
+            SabnzbdHistory sabHistory;
+
+            try
+            {
+                sabHistory = _sabnzbdProxy.GetHistory(start, limit, Settings);
+            }
+            catch (DownloadClientException ex)
+            {
+                _logger.ErrorException(ex.Message, ex);
+                return Enumerable.Empty<HistoryItem>();
+            }
+
             var historyItems = new List<HistoryItem>();
 
-            foreach (var sabHistoryItem in items)
+            foreach (var sabHistoryItem in sabHistory.Items)
             {
                 var historyItem = new HistoryItem();
                 historyItem.Id = sabHistoryItem.Id;

src/NzbDrone.Core/Download/Clients/Sabnzbd/SabnzbdProxy.cs

@@ -2,6 +2,7 @@
 using System.IO;
 using Newtonsoft.Json.Linq;
 using NLog;
+using NzbDrone.Common;
 using NzbDrone.Common.Serializer;
 using NzbDrone.Core.Download.Clients.Sabnzbd.Responses;
 using RestSharp;
@@ -112,14 +113,16 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
         {
             var protocol = settings.UseSsl ? "https" : "http";
 
-            var url = string.Format(@"{0}://{1}:{2}/api?{3}&apikey={4}&ma_username={5}&ma_password={6}&output=json",
+            var authentication = settings.ApiKey.IsNullOrWhiteSpace() ?
+                                 String.Format("ma_username={0}&ma_password={1}", settings.Username, settings.Password) :
+                                 String.Format("apikey={0}", settings.ApiKey);
+
+            var url = string.Format(@"{0}://{1}:{2}/api?{3}&{4}&output=json",
                                  protocol,
                                  settings.Host,
                                  settings.Port,
                                  action,
-                                 settings.ApiKey,
-                                 settings.Username,
-                                 settings.Password);
+                                 authentication);
 
             _logger.Trace(url);
 
@@ -130,7 +133,7 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
         {
             if (response.ResponseStatus != ResponseStatus.Completed)
             {
-                throw new ApplicationException("Unable to connect to SABnzbd, please check your settings");
+                throw new DownloadClientException("Unable to connect to SABnzbd, please check your settings");
             }
 
             SabnzbdJsonError result;

src/NzbDrone.Core/MediaFiles/EpisodeFileMovingService.cs

@@ -81,7 +81,15 @@ namespace NzbDrone.Core.MediaFiles
 
             if (!_diskProvider.FolderExists(directoryName))
             {
-                _diskProvider.CreateFolder(directoryName);
+                try
+                {
+                    _diskProvider.CreateFolder(directoryName);
+                }
+                catch (IOException ex)
+                {
+                    _logger.ErrorException("Unable to create directory: " + directoryName, ex);
+                }
+                
                 SetFolderPermissions(directoryName);
 
                 if (!directoryName.PathEquals(series.Path))