[英]protobuf-net deserializing: “Arithmetic operation resulted in an overflow.”
I'm using protobuf-net for serializing/deserialzing my models. 我正在使用protobuf-net序列化/反序列化我的模型。
My model is rather simple, serialization seems to work all the time, but if I add specific types to my model deserialization later seems to fail. 我的模型相当简单,序列化似乎一直都可以,但是如果我在模型中添加特定类型,反序列化似乎会失败。
I get an "Arithmetic operation resulted in an Overflow" exception as soon as I add "int", "long" or "DateTime" to my models. 我在模型中添加“ int”,“ long”或“ DateTime”后,立即收到“算术运算导致溢出”异常。
Model: 模型:
[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; }
}
When I remove the "Time" Property it always seems to work. 当我删除“时间”属性时,它似乎总是起作用。
Exception: 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
Am I doing something wrong? 难道我做错了什么?
[EDIT] [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);
}
}
}
}
From comments: 来自评论:
most likely : encoding inappropriately
最有可能:编码不当
Called it! 叫它! (from your edit)
(根据您的编辑)
return Encoding.UTF8.GetString(buffer, 0, buffer.Length);
返回Encoding.UTF8.GetString(buffer,0,buffer.Length);
protobuf data is not text . protobuf数据不是文本 。 You cannot use a text encoding to get a text representation of it - in fact, you are using this text encoding backwards , and it has no defined behaviour here.
您不能使用文本编码来获取其文本表示形式-实际上,您正在使用此文本编码向后显示 ,并且此处没有定义的行为。 You have corrupted the data.
您已损坏数据。 A larger write up (because I see this often) is here (the first section).
较大的文章(因为我经常看到) 在这里 (第一部分)。
However, the short version is: don't do that. 但是,简短的版本是:请勿这样做。 If you need a
string
, use base-64 or similar instead: 如果您需要一个
string
,请使用base-64或类似的string
:
var buffer = ms.GetBuffer();
return Convert.ToBase64String(buffer, 0, (int)ms.Length);
(likewise, use Convert.FromBase64String
to reverse this process) (同样,使用
Convert.FromBase64String
来逆转此过程)
However, if possible it would be preferable to simply avoid the need to pass around string
. 但是,如果可能的话,最好避免直接传递
string
。 byte[]
would work fine (ie return ms.ToArray()
). byte[]
可以正常工作(即return ms.ToArray()
)。
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