/// <summary>把消息写入流中，默认调用序列化框架</summary>
/// <param name="stream">数据流</param>
/// <param name="rwkind">序列化类型</param>
protected virtual void OnWrite(Stream stream, RWKinds rwkind)
{
var writer = RWService.CreateWriter(rwkind);
writer.Stream = stream;
OnReadWriteSet(writer);
writer.Settings.Encoding = new UTF8Encoding(false);
if (Debug)
{
writer.Debug = true;
writer.EnableTraceStream();
}
writer.WriteObject(this);
writer.Flush();
}
/// <summary>从流中读取消息内容，默认调用序列化框架</summary>
/// <param name="stream"></param>
/// <param name="rwkind"></param>
/// <returns></returns>
protected virtual Boolean OnRead(Stream stream, RWKinds rwkind)
{
var reader = RWService.CreateReader(rwkind);
reader.Stream = stream;
OnReadWriteSet(reader);
if (Debug)
{
reader.Debug = true;
reader.EnableTraceStream();
}
// 传msg进去，因为是引用类型，所以问题不大
Object msg = this;
return(reader.ReadObject(msg.GetType(), ref msg, null));
}
///// <summary>序列化当前消息到流中</summary>
///// <param name="stream"></param>
//public void Write(Stream stream) { Write(stream, SerializationKinds.Binary); }
/// <summary>序列化当前消息到流中</summary>
/// <param name="stream"></param>
/// <param name="rwkind"></param>
public void Write(Stream stream, RWKinds rwkind = RWKinds.Binary)
{
//var writer = new BinaryWriterX(stream);
var writer = RWService.CreateWriter(rwkind);
writer.Stream = stream;
Set(writer.Settings);
writer.Settings.Encoding = new UTF8Encoding(false);
if (Debug)
{
writer.Debug = true;
writer.EnableTraceStream();
}
// 二进制增加头部
if (rwkind == RWKinds.Binary)
{
// 判断并写入消息头
if (_Header != null && _Header.UseHeader)
{
Header.Write(writer.Stream);
}
// 基类写入编号，保证编号在最前面
writer.Write((Byte)Kind);
}
else
{
var n = (Byte)Kind;
var bts = Encoding.ASCII.GetBytes(n.ToString());
stream.Write(bts, 0, bts.Length);
}
writer.WriteObject(this);
writer.Flush();
}
///// <summary>从流中读取消息</summary>
///// <param name="stream">数据流</param>
///// <returns></returns>
//public static Message Read(Stream stream) { return Read(stream, false); }
/// <summary>从流中读取消息</summary>
/// <param name="stream">数据流</param>
/// <param name="rwkind"></param>
/// <param name="ignoreException">忽略异常。如果忽略异常，读取失败时将返回空，并还原数据流位置</param>
/// <returns></returns>
public static Message Read(Stream stream, RWKinds rwkind = RWKinds.Binary, Boolean ignoreException = false)
{
if (stream == null || stream.Length - stream.Position < 1)
{
return(null);
}
//var reader = new BinaryReaderX(stream);
var reader = RWService.CreateReader(rwkind);
reader.Stream = stream;
Set(reader.Settings);
if (Debug)
{
reader.Debug = true;
reader.EnableTraceStream();
}
var start = stream.Position;
// 消息类型，不同序列化方法的识别方式不同
MessageKind kind = (MessageKind)0;
Type type = null;
MessageHeader header = null;
if (rwkind == RWKinds.Binary)
{
// 检查第一个字节
//var ch = reader.Reader.PeekChar();
var ch = stream.ReadByte();
if (ch < 0)
{
return(null);
}
stream.Seek(-1, SeekOrigin.Current);
var first = (Byte)ch;
#region 消息头部扩展
// 第一个字节的最高位决定是否扩展
if (MessageHeader.IsValid(first))
{
try
{
header = new MessageHeader();
header.Read(reader.Stream);
}
catch
{
stream.Position = start;
return(null);
}
// 如果使用了消息头，判断一下数据流长度是否满足
if (header.HasFlag(MessageHeader.Flags.Length) && header.Length > stream.Length - stream.Position)
{
stream.Position = start;
return(null);
}
}
#endregion
// 读取了响应类型和消息类型后，动态创建消息对象
kind = (MessageKind)(reader.ReadByte() & 0x7F);
}
else
{
// 前面的数字表示消息种类
var sb = new StringBuilder();
Char c;
while (true)
{
c = (Char)stream.ReadByte();
if (c < '0' || c > '9')
{
break;
}
sb.Append(c);
}
// 多读了一个，退回去
stream.Seek(-1, SeekOrigin.Current);
kind = (MessageKind)Convert.ToByte(sb.ToString());
//var s = stream.IndexOf(new Byte[] { (Byte)'<' });
//if (s >= 0)
//{
// var e = stream.IndexOf(new Byte[] { (Byte)'>' }, s + 1);
// if (e >= 0)
// {
// stream.Position = s;
// var msgName = Encoding.UTF8.GetString(stream.ReadBytes(e - s - 1));
// if (!String.IsNullOrEmpty(msgName) && !msgName.Contains(" ")) type = TypeX.GetType(msgName);
// }
//}
//var settings = new XmlReaderSettings();
//settings.IgnoreWhitespace = true;
//settings.IgnoreComments = true;
//var xr = XmlReader.Create(stream, settings);
//while (xr.NodeType != XmlNodeType.Element) { if (!xr.Read())break; }
//stream.Position = start;
}
#region 识别消息类型
if (type == null)
{
type = ObjectContainer.Current.ResolveType <Message>(kind);
}
if (type == null)
{
if (ignoreException)
{
stream.Position = start;
return(null);
}
else
{
throw new XException("无法识别的消息类型（Kind={0}）！", kind);
}
}
#endregion
#region 读取消息
Message msg;
if (stream.Position == stream.Length)
{
msg = TypeX.CreateInstance(type, null) as Message;
}
else
{
try
{
msg = reader.ReadObject(type) as Message;
if (msg == null)
{
throw new XException("数据格式不正确！");
}
}
catch (Exception ex)
{
if (ignoreException)
{
stream.Position = start;
return(null);
}
var em = ex.Message;
if (DumpStreamWhenError)
{
stream.Position = start;
var bin = String.Format("{0:yyyy_MM_dd_HHmmss_fff}.msg", DateTime.Now);
bin = Path.Combine(XTrace.LogPath, bin);
if (!Path.IsPathRooted(bin))
{
bin = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, bin);
}
bin = Path.GetFullPath(bin);
var dir = Path.GetDirectoryName(bin);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
File.WriteAllBytes(bin, stream.ReadBytes());
em = String.Format("已Dump数据流到{0}。{1}", bin, em);
}
var ex2 = new XException("无法从数据流中读取{0}（Kind={1}）消息！{2}", type.Name, kind, em);
throw ex2;
}
}
msg.Header = header;
return(msg);
#endregion
}
