fixed UTF-8 BOM of Newtonsoft.Json (#272)

Author: catcherwong

serialization/EasyCaching.Serialization.Json/DefaultJsonSerializer.cs

@@ -17,6 +17,11 @@ public class DefaultJsonSerializer : IEasyCachingSerializer
         /// </summary>
         private readonly JsonSerializer jsonSerializer;
 
+        /// <summary>
+        /// default utf-8 encoding
+        /// </summary>
+        private static readonly UTF8Encoding s_utf8Encoding = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true);
+
         /// <summary>
         /// The name.
         /// </summary>
@@ -48,7 +53,7 @@ public DefaultJsonSerializer(string name, JsonSerializerSettings serializerSetti
         public T Deserialize<T>(byte[] bytes)
         {
             using (var ms = new MemoryStream(bytes))
-            using (var sr = new StreamReader(ms, Encoding.UTF8))
+            using (var sr = new StreamReader(ms, s_utf8Encoding))
             using (var jtr = new JsonTextReader(sr))
             {
                 return jsonSerializer.Deserialize<T>(jtr);
@@ -64,7 +69,7 @@ public T Deserialize<T>(byte[] bytes)
         public object Deserialize(byte[] bytes, Type type)
         {
             using (var ms = new MemoryStream(bytes))
-            using (var sr = new StreamReader(ms, Encoding.UTF8))
+            using (var sr = new StreamReader(ms, s_utf8Encoding))
             using (var jtr = new JsonTextReader(sr))
             {
                 return jsonSerializer.Deserialize(jtr, type);
@@ -81,7 +86,7 @@ public byte[] Serialize<T>(T value)
         {
             using (var ms = new MemoryStream())
             {
-                using (var sr = new StreamWriter(ms, Encoding.UTF8))
+                using (var sr = new StreamWriter(ms, s_utf8Encoding))
                 using (var jtr = new JsonTextWriter(sr))
                 {
                     jsonSerializer.Serialize(jtr, value);

serialization/EasyCaching.Serialization.SystemTextJson/DefaultJsonSerializer.cs

@@ -80,8 +80,9 @@ public object DeserializeObject(ArraySegment<byte> value)
                 throw new InvalidDataException("JsonTranscoder only supports [\"TypeName\", object]");
             }
         }
+
         /// <summary>
-        //; Serialize the specified value.
+        /// Serialize the specified value.
         /// </summary>
         /// <returns>The serialize.</returns>
         /// <param name="value">Value.</param>