// 处理 Server 端可能发来的 Close
// return value:
// -1 error
// 0 不是Close
// 1 是Close，已经迫使ZChannel处于尚未初始化状态
// return InitialResult:
// 在 InitialResult::ResultInfo 中返回诊断信息
async Task <InitialResult> CheckServerCloseRequest()
{
if (this._channel.Connected == false || this._channel.DataAvailable == false)
{
return(new InitialResult()); // 没有发现问题
}
// 注意调用返回后如果发现出错，调主要主动 Close 和重新分配 TcpClient
RecvResult result = await ZChannel.SimpleRecvTcpPackage(this._channel._client, -1).ConfigureAwait(false);
if (result.Value == -1)
{
this.CloseConnection();
return(new InitialResult {
Value = -1, ErrorInfo = result.ErrorInfo
});
}
BerTree tree1 = new BerTree();
// TODO: 这里需要捕获异常，然后把 Package Dump 到日志文件(base64 形态)，便于事后分析调试
tree1.m_RootNode.BuildPartTree(result.Package,
0,
result.Package.Length,
out int nTotalLen);
if (tree1.GetAPDuRoot().m_uTag != BerTree.z3950_close)
{
// 不是Close
return(new InitialResult {
Value = 0
});
}
CLOSE_REQUEST closeStruct = new CLOSE_REQUEST();
int nRet = BerTree.GetInfo_closeRequest(
tree1.GetAPDuRoot(),
ref closeStruct,
out string strError);
if (nRet == -1)
{
this.CloseConnection();
return(new InitialResult {
Value = -1, ErrorInfo = strError
});
}
this.CloseConnection();
return(new InitialResult {
Value = 1, ResultInfo = closeStruct.m_strDiagnosticInformation
});
}
// 处理 Server 端可能发来的 Close
// return value:
// -1 error
// 0 不是Close
// 1 是Close，已经迫使ZChannel处于尚未初始化状态
// return InitialResult:
// 在 InitialResult::ResultInfo 中返回诊断信息
async Task <InitialResult> CheckServerCloseRequest()
{
if (this._channel.Connected == false || this._channel.DataAvailable == false)
{
return(new InitialResult()); // 没有发现问题
}
RecvResult result = await this._channel.SimpleRecvTcpPackage();
if (result.Value == -1)
{
return new InitialResult {
Value = -1, ErrorInfo = result.ErrorInfo
}
}
;
BerTree tree1 = new BerTree();
tree1.m_RootNode.BuildPartTree(result.Package,
0,
result.Package.Length,
out int nTotalLen);
if (tree1.GetAPDuRoot().m_uTag != BerTree.z3950_close)
{
// 不是Close
return(new InitialResult {
Value = 0
});
}
CLOSE_REQUEST closeStruct = new CLOSE_REQUEST();
int nRet = BerTree.GetInfo_closeRequest(
tree1.GetAPDuRoot(),
ref closeStruct,
out string strError);
if (nRet == -1)
{
return new InitialResult {
Value = -1, ErrorInfo = strError
}
}
;
this.CloseConnection();
return(new InitialResult {
Value = 1, ResultInfo = closeStruct.m_strDiagnosticInformation
});
}