Support deserializing '0' and '1' for boolean values

Author: mythz

src/ServiceStack.Text/Common/DeserializeBuiltin.cs

@@ -32,7 +32,7 @@ private static ParseStringDelegate GetParseFn()
         {
             //Note the generic typeof(T) is faster than using var type = typeof(T)
             if (typeof(T) == typeof(bool))
-                return value => bool.Parse(value);
+                return value => value.Length == 1 ? value == "1" : bool.Parse(value); 
             if (typeof(T) == typeof(byte))
                 return value => byte.Parse(value);
             if (typeof(T) == typeof(sbyte))
@@ -79,7 +79,7 @@ private static ParseStringDelegate GetParseFn()
                 return value => ulong.Parse(value);
 
             if (typeof(T) == typeof(bool?))
-                return value => string.IsNullOrEmpty(value) ? (bool?)null : bool.Parse(value);
+                return value => string.IsNullOrEmpty(value) ? (bool?)null : value.Length == 1 ? value == "1" : bool.Parse(value); 
             if (typeof(T) == typeof(byte?))
                 return value => string.IsNullOrEmpty(value) ? (byte?)null : byte.Parse(value);
             if (typeof(T) == typeof(sbyte?))

tests/ServiceStack.Text.Tests/BclStructTests.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Drawing;
+using System.Runtime.Serialization;
 using NUnit.Framework;
 using ServiceStack.Common;
 
@@ -76,5 +77,28 @@ public void Can_serialize_dto_with_enum_flags()
 
             Assert.That(deserialized.Enum, Is.EqualTo(ExampleEnum.One | ExampleEnum.Four));
         }
-	}
+
+        [DataContract]
+        public class Item
+        {
+            [DataMember(Name = "favorite")]
+            public bool IsFavorite { get; set; }
+        }
+
+        [Test]
+        public void Can_customize_bool_deserialization()
+        {
+            var dto1 = "{\"favorite\":1}".FromJson<Item>();
+            Assert.That(dto1.IsFavorite, Is.True);
+
+            var dto0 = "{\"favorite\":0}".FromJson<Item>();
+            Assert.That(dto0.IsFavorite, Is.False);
+
+            var dtoTrue = "{\"favorite\":true}".FromJson<Item>();
+            Assert.That(dtoTrue.IsFavorite, Is.True);
+
+            var dtoFalse = "{\"favorite\":0}".FromJson<Item>();
+            Assert.That(dtoFalse.IsFavorite, Is.False);
+        }
+    }
 }