#region License // Copyright (c) 2007 James Newton-King // // Permission is hereby granted, free of charge, to any person // obtaining a copy of this software and associated documentation // files (the "Software"), to deal in the Software without // restriction, including without limitation the rights to use, // copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following // conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR // OTHER DEALINGS IN THE SOFTWARE. #endregion #if !NET20 || HAVE_ADO_NET using System; using System.Globalization; using Newtonsoft.Json.Utilities; using System.Collections.Generic; #if HAVE_ADO_NET using System.Data.SqlTypes; #endif namespace Newtonsoft.Json.Converters { /// <summary> /// Converts a binary value to and from a base 64 string value. /// </summary> internal class BinaryConverter : JsonConverter { #if !NET20 private const string BinaryTypeName = "System.Data.Linq.Binary"; private const string BinaryToArrayName = "ToArray"; private static ReflectionObject _reflectionObject; #endif /// <summary> /// Writes the JSON representation of the object. /// </summary> /// <param name="writer">The <see cref="JsonWriter"/> to write to.</param> /// <param name="value">The value.</param> /// <param name="serializer">The calling serializer.</param> public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) { if (value == null) { writer.WriteNull(); return; } byte[] data = GetByteArray(value); writer.WriteValue(data); } private byte[] GetByteArray(object value) { #if !NET20 if (value.GetType().FullName == BinaryTypeName) { EnsureReflectionObject(value.GetType()); return (byte[])_reflectionObject.GetValue(value, BinaryToArrayName); } #endif #if HAVE_ADO_NET if (value is SqlBinary binary) { return binary.Value; } #endif throw new JsonSerializationException("Unexpected value type when writing binary: {0}".FormatWith(CultureInfo.InvariantCulture, value.GetType())); } #if !NET20 private static void EnsureReflectionObject(Type t) { if (_reflectionObject == null) { _reflectionObject = ReflectionObject.Create(t, t.GetConstructor(new[] { typeof(byte[]) }), BinaryToArrayName); } } #endif /// <summary> /// Reads the JSON representation of the object. /// </summary> /// <param name="reader">The <see cref="JsonReader"/> to read from.</param> /// <param name="objectType">Type of the object.</param> /// <param name="existingValue">The existing value of object being read.</param> /// <param name="serializer">The calling serializer.</param> /// <returns>The object value.</returns> public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) { if (reader.TokenType == JsonToken.Null) { if (!ReflectionUtils.IsNullable(objectType)) { throw JsonSerializationException.Create(reader, "Cannot convert null value to {0}.".FormatWith(CultureInfo.InvariantCulture, objectType)); } return null; } byte[] data; if (reader.TokenType == JsonToken.StartArray) { data = ReadByteArray(reader); } else if (reader.TokenType == JsonToken.String) { // current token is already at base64 string // unable to call ReadAsBytes so do it the old fashion way string encodedData = reader.Value.ToString(); data = Convert.FromBase64String(encodedData); } else { throw JsonSerializationException.Create(reader, "Unexpected token parsing binary. Expected String or StartArray, got {0}.".FormatWith(CultureInfo.InvariantCulture, reader.TokenType)); } Type t = (ReflectionUtils.IsNullableType(objectType)) ? Nullable.GetUnderlyingType(objectType) : objectType; #if !NET20 if (t.FullName == BinaryTypeName) { EnsureReflectionObject(t); return _reflectionObject.Creator(data); } #endif #if HAVE_ADO_NET if (t == typeof(SqlBinary)) { return new SqlBinary(data); } #endif throw JsonSerializationException.Create(reader, "Unexpected object type when writing binary: {0}".FormatWith(CultureInfo.InvariantCulture, objectType)); } private byte[] ReadByteArray(JsonReader reader) { List<byte> byteList = new List<byte>(); while (reader.Read()) { switch (reader.TokenType) { case JsonToken.Integer: byteList.Add(Convert.ToByte(reader.Value, CultureInfo.InvariantCulture)); break; case JsonToken.EndArray: return byteList.ToArray(); case JsonToken.Comment: // skip break; default: throw JsonSerializationException.Create(reader, "Unexpected token when reading bytes: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType)); } } throw JsonSerializationException.Create(reader, "Unexpected end when reading bytes."); } /// <summary> /// Determines whether this instance can convert the specified object type. /// </summary> /// <param name="objectType">Type of the object.</param> /// <returns> /// <c>true</c> if this instance can convert the specified object type; otherwise, <c>false</c>. /// </returns> public override bool CanConvert(Type objectType) { #if !NET20 if (objectType.FullName == BinaryTypeName) { return true; } #endif #if HAVE_ADO_NET if (objectType == typeof(SqlBinary) || objectType == typeof(SqlBinary?)) { return true; } #endif return false; } } } #endif