new: smarter validation for newznab indexer settings

src/NzbDrone.Core/Indexers/Newznab/NewznabParser.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Xml.Linq;
 using NzbDrone.Core.Parser.Model;
@@ -7,6 +8,12 @@ namespace NzbDrone.Core.Indexers.Newznab
 {
     public class NewznabParser : RssParserBase
     {
+
+        private static readonly string[] IgnoredErrors =
+        {
+            "Request limit reached",
+        };
+
         protected override string GetNzbInfoUrl(XElement item)
         {
             return item.Comments().Replace("#comments", "");
@@ -25,6 +32,23 @@ namespace NzbDrone.Core.Indexers.Newznab
             return ParseSize(item.Description());
         }
 
+        public override IEnumerable<ReleaseInfo> Process(string xml, string url)
+        {
+            try
+            {
+                return base.Process(xml, url);
+            }
+            catch (NewznabException e)
+            {
+                if (!IgnoredErrors.Any(ignoredError => e.Message.Contains(ignoredError)))
+                {
+                    throw;
+                }
+                _logger.Error(e.Message);
+                return new List<ReleaseInfo>();
+            }
+        }
+
         protected override ReleaseInfo PostProcessor(XElement item, ReleaseInfo currentResult)
         {
             if (currentResult != null)

src/NzbDrone.Core/Indexers/Newznab/NewznabPreProcessor.cs

@@ -15,10 +15,17 @@ namespace NzbDrone.Core.Indexers.Newznab
             if (error == null) return;
 
             var code = Convert.ToInt32(error.Attribute("code").Value);
+            var errorMessage = error.Attribute("description").Value;
 
-            if (code >= 100 && code <= 199) throw new ApiKeyException("Invalid API key: {0}");
 
-            throw new NewznabException("Newznab error detected: {0}", error.Attribute("description").Value);
+            if (code >= 100 && code <= 199) throw new ApiKeyException("Invalid API key");
+
+            if (!url.Contains("apikey=") && errorMessage == "Missing parameter")
+            {
+                throw new ApiKeyException("Indexer requires and API key");
+            }
+
+            throw new NewznabException("Newznab error detected: {0}", errorMessage);
         }
     }
 }

src/NzbDrone.Core/Indexers/Newznab/NewznabSettings.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using FluentValidation;
 using FluentValidation.Results;
 using NzbDrone.Core.Annotations;
@@ -10,9 +11,25 @@ namespace NzbDrone.Core.Indexers.Newznab
 {
     public class NewznabSettingsValidator : AbstractValidator<NewznabSettings>
     {
+        private static readonly string[] ApiKeyWhiteList =
+        {
+            "nzbs.org",
+            "nzb.su",
+            "dognzb.cr",
+            "nzbplanet.net",
+            "nzbid.org",
+            "nzbndx.com",
+        };
+
+        private static bool ShouldHaveApiKey(NewznabSettings settings)
+        {
+            return ApiKeyWhiteList.Any(c => settings.Url.ToLowerInvariant().Contains(c));
+        }
+
         public NewznabSettingsValidator()
         {
             RuleFor(c => c.Url).ValidRootUrl();
+            RuleFor(c => c.ApiKey).NotEmpty().When(ShouldHaveApiKey);
         }
     }
 

src/NzbDrone.Core/Indexers/NewznabTestService.cs

@@ -41,14 +41,14 @@ namespace NzbDrone.Core.Indexers
 
                 NewznabPreProcessor.Process(xml, url);
             }
-            catch (ApiKeyException apiKeyException)
+            catch (ApiKeyException)
             {
                 _logger.Warn("Indexer returned result for Newznab RSS URL, API Key appears to be invalid");
 
                 var apiKeyFailure = new ValidationFailure("ApiKey", "Invalid API Key");
                 throw new ValidationException(new List<ValidationFailure> { apiKeyFailure }.ToArray());
             }
-            catch (Exception ex)
+            catch (Exception)
             {
                 _logger.Warn("Indexer doesn't appear to be Newznab based");
 

src/NzbDrone.Core/Indexers/RssParserBase.cs

@@ -15,7 +15,7 @@ namespace NzbDrone.Core.Indexers
 {
     public abstract class RssParserBase : IParseFeed
     {
-        private readonly Logger _logger;
+        protected readonly Logger _logger;
 
         protected virtual ReleaseInfo CreateNewReleaseInfo()
         {
@@ -27,7 +27,7 @@ namespace NzbDrone.Core.Indexers
             _logger = NzbDroneLogger.GetLogger(this);
         }
 
-        public IEnumerable<ReleaseInfo> Process(string xml, string url)
+        public virtual IEnumerable<ReleaseInfo> Process(string xml, string url)
         {
             PreProcess(xml, url);