/// <summary>
/// 重写方法：启动对 HTTP 处理程序的异步调用
/// </summary>
/// <param name="context"></param>
/// <param name="cb">异步方法调用完成时要调用的 AsyncCallback。如果 cb 为 nullNothingnullptrnull 引用（在 Visual Basic 中为 Nothing），则不调用委托</param>
/// <param name="extraData">处理该请求所需的所有额外数据</param>
/// <returns></returns>
public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
{
// get the result here
CometAsyncResult result = new CometAsyncResult(context, cb, extraData);
result.BeginWaitRequest();
// ok, return it
return(result);
}
/// <summary>
/// 重写方法：进程结束时提供异步处理 End 方法
/// </summary>
/// <param name="result"></param>
public void EndProcessRequest(IAsyncResult result)
{
CometAsyncResult cometAsyncResult = result as CometAsyncResult;
if (cometAsyncResult != null && cometAsyncResult.ResponseObject != null)
{
cometAsyncResult.HttpContext.Response.Write(cometAsyncResult.ResponseObject);
}
cometAsyncResult.HttpContext.Response.End();
}
public CometWaitRequest(CometAsyncResult result)
{
this.result = result;
}