上面的這個代碼,我們發現一個問題啊,如果訪問那個鏈接要好久,那麼這也很受傷啊。
是否能加入一個超時,如果訪問一段時間沒有返回結果,那麼把資源留給別的需求者。
public static async Task<string> visitTimeoutUrl(HttpClient client,string url)
{
var visitTask=client.GetStringAsync(url);
var timeoutTask = Task.Delay(3000);
var completedTask = await Task.WhenAny(visitTask,timeoutTask);
if (completedTask == timeoutTask)
{
return null;
}
return await visitTask;
}
void asyncMath() { if (SetBridgeTask.IsCompleted) { SetBridgeTask = new Task(() => {
Thread.Yield();
}}
if (SetBridgeTask.Status != TaskStatus.Running && SetBridgeTask.Status != TaskStatus.WaitingToRun)
{ SetBridgeTask.Start(); }
} Task voidTask= new Task(() => { Thread.Yield();; }); var secSpan = TimeSpan.FromSeconds(10); var timeoutTask = Task.Delay(secSpan); var completedTask = await Task.WhenAny(voidTask, timeoutTask); if (completedTask == timeoutTask) { MessageBox.Show("test"); }