/// <summary>
/// 先接收到了数据头后，再调用接受数据身子，获得完整的数据
/// </summary>
/// <param name="ar"></param>
private void RcvBodyData(IAsyncResult ar)
{
try
{
PEPkg pack = (PEPkg)ar.AsyncState;
int len = skt.EndReceive(ar);
if (len > 0)
{
pack.bodyIndex += len;
//同样，如果接收到的数据长度比目标数据长度要短，则继续接受直到数据完整
if (pack.bodyIndex < pack.bodyLen)
{
skt.BeginReceive(pack.bodyBuff,
pack.bodyIndex,
pack.bodyLen - pack.bodyIndex,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
else
{
//反序列化数据
T msg = PETool.DeSerialize <T>(pack.bodyBuff);
OnReciveMsg(msg);
//loop recive，重置pack的设置后，继续开始接受数据，直到关闭连接
pack.ResetData();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
}
//同样，防止空数据，要关闭连接
else
{
OnDisConnected();
Clear();
}
}
catch (Exception e)
{
PETool.LogMsg("RcvBodyError:" + e.Message, LogLevel.Error);
}
}
private void RcvHeadData(IAsyncResult ar)
{
try {
PEPkg pack = (PEPkg)ar.AsyncState;
//返回的len为该次接受数据的总长度
int len = skt.EndReceive(ar);
if (len > 0)
{
//headIndex此时为数据的包括数据头和数据身体的总长度
pack.headIndex += len;
//如果数据的总长度得到的值要比数据头默认的4个字节要短，则说明该数据连数据头都不完整，继续接受数据直到数据完整
if (pack.headIndex < pack.headLen)
{
skt.BeginReceive(
pack.headBuff,
pack.headIndex,
pack.headLen - pack.headIndex,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
else
{
//初始化数据身体，并且再次开始接受，这次接受的目的是按照数据头指定的长度接受数据身体
pack.InitBodyBuff();
skt.BeginReceive(pack.bodyBuff,
0,
pack.bodyLen,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
}
//当len<=0的情况，即远程主机强制关闭了一个现有的连接，这时候服务器会疯狂接收到空数据，这时候就应该关闭掉这段Socket连接
else
{
//发送关闭连接的信息
OnDisConnected();
//关闭连接
Clear();
}
}
catch (Exception e)
{
PETool.LogMsg("RcvHeadError:" + e.Message, LogLevel.Error);
}
}
private void RcvHeadData(IAsyncResult ar)
{
try {
PEPkg pack = (PEPkg)ar.AsyncState;
if (skt.Available == 0)
{
OnDisConnected();
Clear();
return;
}
int len = skt.EndReceive(ar);
if (len > 0)
{
pack.headIndex += len;
if (pack.headIndex < pack.headLen)
{
skt.BeginReceive(
pack.headBuff,
pack.headIndex,
pack.headLen - pack.headIndex,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
else
{
pack.InitBodyBuff();
skt.BeginReceive(pack.bodyBuff,
0,
pack.bodyLen,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
}
else
{
OnDisConnected();
Clear();
}
}
catch (Exception e) {
PETool.LogMsg("RcvHeadError:" + e.Message, LogLevel.Error);
}
}
private void RcvBodyData(IAsyncResult ar)
{
try {
PEPkg pack = (PEPkg)ar.AsyncState;
int len = skt.EndReceive(ar);
if (len > 0)
{
pack.bodyIndex += len;
if (pack.bodyIndex < pack.bodyLen)
{
skt.BeginReceive(pack.bodyBuff,
pack.bodyIndex,
pack.bodyLen - pack.bodyIndex,
SocketFlags.None,
new AsyncCallback(RcvBodyData),
pack);
}
else
{
T msg = PETool.DeSerialize <T>(pack.bodyBuff);
OnReciveMsg(msg);
//loop recive
pack.ResetData();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
}
else
{
OnDisConnected();
Clear();
}
}
catch (Exception e) {
PETool.LogMsg("RcvBodyError:" + e.Message, LogLevel.Error);
}
}
public void StartRcvData(Socket skt)
{
try {
this.skt = skt;
OnConnected();
PEPkg pack = new PEPkg();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
pack);
}
catch (Exception e) {
PETool.LogMsg("StartRcvData:" + e.Message, LogLevel.Error);
}
}
public void StartRcvData(Socket skt, Action closeCB)
{
try {
this.skt = skt;
this.closeCB = closeCB;
OnConnected();
PEPkg pack = new PEPkg();
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
RcvHeadData,
pack);
}
catch (Exception e) {
PETool.LogMsg("StartRcvData:" + e.Message, LogLevel.Error);
}
}
/// <summary>
/// 接受数据函数，传入连接Socket和要调用的
/// </summary>
/// <param name="skt"></param>
/// <param name="closeCB"></param>
public void StartRcvData(Socket skt, Action closeCB)
{
try {
this.skt = skt;
this.closeCB = closeCB;
//连接成功时调用（发送一条连接成功的信息）
OnConnected();
PEPkg pack = new PEPkg();
//开始接受数据，这次获取数据只是获取数据头，目的是为了计算出数据头指向的数据的长度
skt.BeginReceive(
pack.headBuff,
0,
pack.headLen,
SocketFlags.None,
new AsyncCallback(RcvHeadData),
//传入的objcet为pack
pack);
}
catch (Exception e) {
PETool.LogMsg("StartRcvData:" + e.Message, LogLevel.Error);
}
}