我有两个程序。与服务器创建 DiscoverServerMessage 并通过protobuf进行序列化,然后通过ZMQ发送。在客户端反序列化消息但出错:
Ivalid wire-type; this usually means you have over-written a file without truncating or setting the length.
我在dll项目中有以下课程。
[ProtoContract]
public class DiscoverServerMessage
{
[ProtoMember(1)]
public int Port { get; set; }
[ProtoMember(2)]
public string IP { get; set; }
[ProtoMember(3)]
public string ServerName { get; set; }
public DiscoverServerMessage() { }
}
在Server Project中具有以下代码:
public class Server
{
static void Main(string[] args)
{
ZContext ctx = new ZContext();
ZSocket broadcastSrocket = new ZSocket(ctx, ZSocketType.PUB);
broadcastSrocket.Connect("tcp://127.0.0.1:2666");
ZFrame zfr;
DiscoverServerMessage message = new DiscoverServerMessage() { Port = 2667 , ServerName = "My" };
message.IP = "127.0.0.1";
using (MemoryStream str = new MemoryStream())
{
Serializer.SerializeWithLengthPrefix(str,message,PrefixStyle.Fixed32);
zfr = new ZFrame(str.ToArray());
}
broadcastSrocket.Send(zfr);
}
}
在客户端程序中:
public class Server
{
static void Main(string[] args)
{
ZContext ctx = new ZContext();
ZSocket subSocket = new ZSocket(ctx, ZSocketType.SUB);
subSocket.Connect("tcp://127.0.0.1:2666");
subSocket.SubscribeAll();
ZError err;
ZFrame zfr = subSocket.ReceiveFrame(out err);
DiscoverServerMessage message;
using (MemoryStream stream = new MemoryStream(zfr.Read()))
{
message = Serializer.DeserializeWithLengthPrefix<DiscoverServerMessage >(stream,PrefixStyle.Fixed32);
}
}
}
我的错误是什么?
答案 0 :(得分:0)
要做的第一件事是忘记有关序列化的部分,只需检查发送的内容是否是收到的内容即可,因此-获得str.ToArray()
是(服务器),并将其与zfr.Read()
是什么(客户端)进行比较。如果两个有效载荷不相同:所有其他投注均关闭。最简单的方法通常是通过十六进制,因此:
(服务器):
byte[] blob = str.ToArray();
string hex = BitConverter.ToString(blob); // <== get a copy of this somehow
zfr = new ZFrame(blob);
...
(客户)
byte[] blob = zfr.Read();
string hex = BitConverter.ToString(blob); // <== get a copy of this somehow
using (MemoryStream stream = new MemoryStream(blob))
...
然后检查一下:两个十六进制序列是否相同?
注意:由于您使用的是成帧协议(ZFrame
),因此这里实际上不需要长度前缀,但是...应该不会受到伤害。看起来 就像您在此处使用的是适当的代码一样-以下代码(受代码影响)可以正常工作:
static class Program
{
static void Main()
{
byte[] blob;
// taken from server code
using (MemoryStream str = new MemoryStream())
{
DiscoverServerMessage message = new DiscoverServerMessage() { Port = 2667, ServerName = "My" };
message.IP = "127.0.0.1";
Serializer.SerializeWithLengthPrefix(str, message, PrefixStyle.Fixed32);
blob = str.ToArray();
}
System.Console.WriteLine(BitConverter.ToString(blob));
// taken from client code
using (MemoryStream stream = new MemoryStream(blob))
{
DiscoverServerMessage message;
message = Serializer.DeserializeWithLengthPrefix<DiscoverServerMessage>(stream, PrefixStyle.Fixed32);
Console.WriteLine(message.Port);
Console.WriteLine(message.ServerName);
Console.WriteLine(message.IP);
}
}
}
这里的输出是:
12-00-00-00-08-EB-14-12-09-31-32-37-2E-30-2E-30-2E-31-1A-02-4D-79
2667
My
127.0.0.1
如果仅使用Serialize
/ Deserialize
(没有长度前缀)来做同样的事情,我们将得到(可预测):
08-EB-14-12-09-31-32-37-2E-30-2E-30-2E-31-1A-02-4D-79
2667
My
127.0.0.1
因此,只要客户端和服务器同意(它们出现在您的代码中),它应该在有或没有长度前缀的情况下都可以工作。