// 获得一个连接
public static async Task <OpenConnectionResult> OpenConnectionAsync(string userNameAndUrl)
{
using (var releaser = await _limit.EnterAsync())
{
P2PConnection connection = _table[userNameAndUrl] as P2PConnection;
if (connection != null)
{
// 尝试连接一次
if (connection.IsDisconnected == true)
{
await EnsureConnectMessageServerAsync(
connection,
userNameAndUrl);
}
return(new OpenConnectionResult
{
Value = 0,
Connection = connection
});
}
var accounts = MessageAccountForm.GetAccounts();
var account = FindAccount(accounts, userNameAndUrl);
if (account == null)
{
return(new OpenConnectionResult
{
Value = -1,
ErrorInfo = $"用户名 '{userNameAndUrl}' 没有找到"
});
}
connection = new P2PConnection();
_table[userNameAndUrl] = connection;
var result = await connection.ConnectAsync(account.ServerUrl,
account.UserName,
account.Password,
"");
if (result.Value == -1)
{
return new OpenConnectionResult
{
Value = -1,
ErrorInfo = result.ErrorInfo,
ErrorCode = result.ErrorCode
}
}
;
return(new OpenConnectionResult
{
Value = 0,
Connection = connection
});
}
}
// 触发消息通知事件
public virtual void TriggerAddMessage(P2PConnection connection,
AddMessageEventArgs e)
{
AddMessageEventHandler handler = this.AddMessage;
if (handler != null)
{
handler(connection, e);
}
}
// 确保连接到消息服务器
public static async Task EnsureConnectMessageServerAsync(
P2PConnection connection,
string userNameAndUrl)
{
if (connection.IsDisconnected)
{
var accounts = MessageAccountForm.GetAccounts();
var account = FindAccount(accounts, userNameAndUrl);
if (account == null)
{
return;
}
var result = await connection.ConnectAsync(account.ServerUrl,
account.UserName,
account.Password,
"");
}
}
// 继续填充余下的命中记录
async Task <NormalResult> FillRestRecordsAsync(
P2PConnection connection,
string remoteUserName,
string resultsetName,
int start,
CancellationToken token)
{
try
{
// string remoteUserName = this.comboBox_query_shelfAccount.Text;
while (token.IsCancellationRequested == false)
{
SearchRequest request = new SearchRequest(Guid.NewGuid().ToString(),
null, // loginInfo,
"searchHistory", // "searchBiblio",
"", // "dbNameList",
"!getResult",
"", // this.comboBox_query_from.Text,
"", // this.comboBox_query_matchStyle.Text,
resultsetName,
"json",
-1,
start,
10);
var result = await connection.SearchAsyncLite(remoteUserName,
request,
TimeSpan.FromSeconds(60),
token);
if (result.ResultCount == -1)
{
return(new NormalResult
{
Value = -1,
ErrorInfo = result.ErrorInfo
});
}
if (result.ResultCount == 0)
{
// strError = "没有命中";
return(new NormalResult
{
Value = -1,
ErrorInfo = "检索没有命中结果。无法获得结果"
});
}
if (start >= result.ResultCount)
{
break;
}
FillRecords(result.Records, false, token);
start += result.Records.Count;
if (start >= result.ResultCount)
{
break;
}
}
return(new NormalResult());
}
catch (AggregateException ex)
{
return(new NormalResult
{
Value = -1,
ErrorInfo = MessageConnection.GetExceptionText(ex)
});
}
catch (Exception ex)
{
return(new NormalResult
{
Value = -1,
ErrorInfo = ex.Message
});
}
}