/// <summary>
/// 向服务器申请一个同步session，初始文本为空
/// </summary>
/// <returns></returns>
private Boolean ApplySession()
{
Queue <Message> applyMsgs = new Queue <Message>();
Message applyMsg = MessageWrapper.ApplyMsg(CallerID);
applyMsgs.Enqueue(applyMsg);
Boolean isDone = HttpHelper.RequestForIniMsg(Url, applyMsgs, MessageQueues);
return(isDone);
}
