protobuf-net反序列化:;算术运算导致溢出&”;
本文关键字:溢出 算术运算 反序列化 protobuf-net | 更新日期: 2023-09-27 17:58:11
我正在使用protobuf-net来序列化/取消序列化我的模型。
我的模型相当简单,序列化似乎一直有效,但如果我稍后向模型反序列化添加特定类型,则似乎会失败。
一旦我在模型中添加"int"、"long"或"DateTime",就会出现"算术运算导致溢出"异常。
型号:
[ProtoContract]
public class MyModel
{
[ProtoMember(1)]
public DateTime Time { get; set; }
[ProtoMember(2)]
public List<string> SomeList { get; set; }
[ProtoMember(3)]
public string Key { get; set; }
[ProtoMember(4)]
public string Value { get; set; }
}
当我删除"时间"属性时,它似乎总是有效的。
例外:
at ProtoBuf.ProtoReader.TryReadUInt64VariantWithoutMoving(UInt64& value) in c:'Dev'protobuf-net'protobuf-net'ProtoReader.cs:line 375
at ProtoBuf.ProtoReader.ReadInt64() in c:'Dev'protobuf-net'protobuf-net'ProtoReader.cs:line 357
at ProtoBuf.BclHelpers.ReadTimeSpanTicks(ProtoReader source) in c:'Dev'protobuf-net'protobuf-net'BclHelpers.cs:line 191
at ProtoBuf.Serializers.DateTimeSerializer.Read(Object value, ProtoReader source) in c:'Dev'protobuf-net'protobuf-net'Serializers'DateTimeSerializer.cs:line 35
at ProtoBuf.Serializers.PropertyDecorator.Read(Object value, ProtoReader source) in c:'Dev'protobuf-net'protobuf-net'Serializers'PropertyDecorator.cs:line 77
at ProtoBuf.Serializers.TypeSerializer.Read(Object value, ProtoReader source) in c:'Dev'protobuf-net'protobuf-net'Serializers'TypeSerializer.cs:line 230
at ProtoBuf.Meta.TypeModel.DeserializeCore(ProtoReader reader, Type type, Object value, Boolean noAutoCreate) in c:'Dev'protobuf-net'protobuf-net'Meta'TypeModel.cs:line 700
at ProtoBuf.Meta.TypeModel.Deserialize(Stream source, Object value, Type type, SerializationContext context) in c:'Dev'protobuf-net'protobuf-net'Meta'TypeModel.cs:line 589
at ProtoBuf.Serializer.Deserialize[T](Stream source) in c:'Dev'protobuf-net'protobuf-net'Serializer.cs:line 77
我做错什么了吗?
[编辑]
private static void Main(string[] args)
{
var proto = new SerializeProtoTest();
var model = new MyModel
{
Key = "abc",
SomeList = new List<string> { "cde" },
Time = DateTime.UtcNow,
Value = "something"
};
var s = proto.Serialize(model);
var d = proto.Deserialize<MyModel>(s);
Console.ReadKey();
}
[ProtoContract]
public class MyModel
{
[ProtoMember(3)]
public string Key { get; set; }
[ProtoMember(2)]
public List<string> SomeList { get; set; }
[ProtoMember(1)]
public DateTime Time { get; set; }
[ProtoMember(4)]
public string Value { get; set; }
}
public class SerializeProtoTest
{
public T Deserialize<T>(string value)
{
using (var ms = new MemoryStream(Encoding.UTF8.GetBytes(value)))
{
return Serializer.Deserialize<T>(ms);
}
}
public string Serialize<T>(T obj)
{
using (var ms = new MemoryStream())
{
Serializer.Serialize(ms, obj);
var buffer = ms.ToArray();
return Encoding.UTF8.GetString(buffer, 0, buffer.Length);
}
}
}
}
来自注释:
最有可能的是:编码不当
叫它!(来自您的编辑)
return编码。UTF8.GetString(缓冲区,0,缓冲区长度);
protobuf数据不是文本。您不能使用文本编码来获得它的文本表示-事实上,您正在向后使用此文本编码,并且它在这里没有定义的行为。您已损坏数据。这里有一篇更大的综述(因为我经常看到)(第一部分)。
然而,简短的说法是:不要那样做。如果您需要string
,请使用base-64或类似产品:
var buffer = ms.GetBuffer();
return Convert.ToBase64String(buffer, 0, (int)ms.Length);
(同样,使用Convert.FromBase64String
来反转此过程)
然而,如果可能的话,最好简单地避免绕过string
的需要。CCD_ 4将正常工作(即return ms.ToArray()
)。