From a22cbfee2fc5526f95f557ddbdbe59e7919fcd34 Mon Sep 17 00:00:00 2001
From: "kay.one" <kay.one@gmail.com>
Date: Thu, 29 Aug 2013 18:32:25 -0700
Subject: [PATCH] handle empty rss response from indexers.

---
 NzbDrone.Core/Indexers/BasicRssParser.cs      | 46 ++++++++++---------
 NzbDrone.Core/Indexers/IndexerFetchService.cs | 12 ++++-
 2 files changed, 35 insertions(+), 23 deletions(-)

diff --git a/NzbDrone.Core/Indexers/BasicRssParser.cs b/NzbDrone.Core/Indexers/BasicRssParser.cs
index d29889248..17963956c 100644
--- a/NzbDrone.Core/Indexers/BasicRssParser.cs
+++ b/NzbDrone.Core/Indexers/BasicRssParser.cs
@@ -4,6 +4,7 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
+using System.Xml;
 using System.Xml.Linq;
 using NLog;
 using NzbDrone.Core.Parser.Model;
@@ -12,7 +13,7 @@ namespace NzbDrone.Core.Indexers
 {
     public interface IParseFeed
     {
-        IEnumerable<ReportInfo> Process(Stream source, string url);
+        IEnumerable<ReportInfo> Process(string xml, string url);
     }
 
     public class BasicRssParser : IParseFeed
@@ -24,34 +25,37 @@ namespace NzbDrone.Core.Indexers
             _logger = LogManager.GetCurrentClassLogger();
         }
 
-        public IEnumerable<ReportInfo> Process(Stream source, string url)
+        public IEnumerable<ReportInfo> Process(string xml, string url)
         {
-            var document = XDocument.Load(source);
-            var items = document.Descendants("item");
+            using (var xmlTextReader = new XmlTextReader(new StringReader(xml)) { DtdProcessing = DtdProcessing.Ignore })
+            {
+                var document = XDocument.Load(xmlTextReader);
+                var items = document.Descendants("item");
 
-            var result = new List<ReportInfo>();
+                var result = new List<ReportInfo>();
 
-            foreach (var item in items)
-            {
-                try
+                foreach (var item in items)
                 {
-                    var reportInfo = ParseFeedItem(item);
-                    if (reportInfo != null)
+                    try
                     {
-                        reportInfo.NzbUrl = GetNzbUrl(item);
-                        reportInfo.NzbInfoUrl = GetNzbInfoUrl(item);
-
-                        result.Add(reportInfo);
+                        var reportInfo = ParseFeedItem(item);
+                        if (reportInfo != null)
+                        {
+                            reportInfo.NzbUrl = GetNzbUrl(item);
+                            reportInfo.NzbInfoUrl = GetNzbInfoUrl(item);
+
+                            result.Add(reportInfo);
+                        }
+                    }
+                    catch (Exception itemEx)
+                    {
+                        itemEx.Data.Add("Item", item.Title());
+                        _logger.ErrorException("An error occurred while processing feed item from " + url, itemEx);
                     }
                 }
-                catch (Exception itemEx)
-                {
-                    itemEx.Data.Add("Item", item.Title());
-                    _logger.ErrorException("An error occurred while processing feed item from " + url, itemEx);
-                }
-            }
 
-            return result;
+                return result;
+            }
         }
 
 
diff --git a/NzbDrone.Core/Indexers/IndexerFetchService.cs b/NzbDrone.Core/Indexers/IndexerFetchService.cs
index 6c46032b6..63a2c5e6b 100644
--- a/NzbDrone.Core/Indexers/IndexerFetchService.cs
+++ b/NzbDrone.Core/Indexers/IndexerFetchService.cs
@@ -106,8 +106,16 @@ namespace NzbDrone.Core.Indexers
                 try
                 {
                     _logger.Trace("Downloading Feed " + url);
-                    var stream = _httpProvider.DownloadStream(url);
-                    result.AddRange(indexer.Parser.Process(stream, url));
+                    var xml = _httpProvider.DownloadString(url);
+                    if (!string.IsNullOrWhiteSpace(xml))
+                    {
+                        result.AddRange(indexer.Parser.Process(xml, url));
+                    }
+                    else
+                    {
+                        _logger.Warn("{0} returned empty response.", url);
+                    }
+
                 }
                 catch (WebException webException)
                 {