如何使await future
持续不超过5秒?
我需要它,因为在某些网络操作中,连接有时会产生静默错误。因此,我的客户只等了几个小时就没有回应。相反,我希望它在客户端等待5秒以上时触发错误
我的代码可以触发错误,但仍在等待中
Future shouldnotlastmorethan5sec() async {
Future foo = Future.delayed(const Duration(seconds: 10));;
foo.timeout(Duration(seconds: 5), onTimeout: (){
//cancel future ??
throw ('Timeout');
});
await foo;
}
Future test() async {
try{
await shouldnotlastmorethan5sec(); //this shoud not last more than 5 seconds
}catch (e){
print ('the error is ${e.toString()}');
}
}
test();
答案 0 :(得分:1)
调用Future.timeout时,您需要使用返回值来获取正确的行为。就您而言:
Future shouldnotlastmorethan5sec() {
Future foo = Future.delayed(const Duration(seconds: 10));
return foo.timeout(Duration(seconds: 5), onTimeout: (){
//cancel future ??
throw ('Timeout');
});
}