added UriJsonConverter to default contract (courtesy of @crunchie84)

Author: Mpdreamz

src/Nest/Nest.csproj

@@ -666,6 +666,7 @@
     <Compile Include="Resolvers\Converters\TokenFilterCollectionConverter.cs" />
     <Compile Include="Resolvers\Converters\TokenizerCollectionConverter.cs" />
     <Compile Include="Resolvers\Converters\TypeNameMarkerConverter.cs" />
+    <Compile Include="Resolvers\Converters\UriConverter.cs" />
     <Compile Include="Resolvers\Converters\WarmerMappingConverter.cs" />
     <Compile Include="Resolvers\Converters\ShardsSegmentConverter.cs" />
     <Compile Include="Resolvers\Converters\MultiGetHitConverter.cs" />

src/Nest/Resolvers/Converters/UriJsonConverter.cs

@@ -0,0 +1,67 @@
+namespace Nest
+{
+  using System;
+  using Newtonsoft.Json;
+
+  /// <summary>
+  /// Converter for converting Uri to String and vica versa
+  /// </summary>
+  /// <remarks>
+  /// Code originated from http://stackoverflow.com/a/8087049/106909
+  /// </remarks>
+  public sealed class UriJsonConverter : JsonConverter
+  {
+    /// <summary>
+    /// Determines whether this instance can convert the specified object type.
+    /// </summary>
+    /// <param name="objectType"></param>
+    /// <returns></returns>
+    public override bool CanConvert(Type objectType)
+    {
+      return objectType == typeof(Uri);
+    }
+
+    /// <summary>
+    /// Reads the JSON representation of the object.
+    /// </summary>
+    /// <param name="reader"></param>
+    /// <param name="objectType"></param>
+    /// <param name="existingValue"></param>
+    /// <param name="serializer"></param>
+    /// <returns></returns>
+    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+    {
+      if (reader.TokenType == JsonToken.String)
+        return new Uri((string)reader.Value);
+
+      if (reader.TokenType == JsonToken.Null)
+        return null;
+
+      throw new InvalidOperationException("Unhandled case for UriConverter. Check to see if this converter has been applied to the wrong serialization type.");
+    }
+
+    /// <summary>
+    /// Writes the JSON representation of the object.
+    /// </summary>
+    /// <param name="writer"></param>
+    /// <param name="value"></param>
+    /// <param name="serializer"></param>
+    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+    {
+      if (null == value)
+      {
+        writer.WriteNull();
+        return;
+      }
+
+      var uriValue = value as Uri;
+      if (uriValue != null)
+      {
+        writer.WriteValue(uriValue.OriginalString);
+        return;
+      }
+
+      throw new InvalidOperationException("Unhandled case for UriConverter. Check to see if this converter has been applied to the wrong serialization type.");
+    }
+  }
+}

src/Nest/Resolvers/ElasticContractResolver.cs

@@ -52,6 +52,9 @@ protected override JsonContract CreateContract(Type objectType)
 			if (objectType == typeof(Facet))
 				contract.Converter = new FacetConverter();
 
+			if (objectType == typeof(Uri))
+				contract.Converter = new UriJsonConverter();
+			
 			if (objectType == typeof(IAggregation))
 				contract.Converter = new AggregationConverter();