英文:
How to abort a net.Dial call in Go?
问题
我有一个客户端试图连接到一个服务器。
我需要能够终止客户端并中止这个拨号尝试。这可能吗？我该如何做到这一点？
超时显然超过了30秒，因为测试会阻塞，直到30秒过去，拨号调用才会失败。
我们可以自己指定超时时间吗？
英文:
I have a client who try to connect to a server.
I need to be able to terminate the client and abort this Dial attempt. Is this possible ? How could I do that ?
The timeout is apparently longer than 30s since the test blocks until the 30s elapse without a failure of the Dial call.
Can we specify a timeout ourself ?
答案1
得分: 9
net.Dialer有Timeout和Deadline字段，并且可以使用DialContext中的上下文，允许设置超时和取消。
您可以参考DialTimeout来了解如何设置基本的Dialer：
func DialTimeout(network, address string, timeout time.Duration) (Conn, error) {
d := Dialer{Timeout: timeout}
return d.Dial(network, address)
}
以下是使用context.Context的示例：
var d Dialer
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
return d.DialContext(ctx, network, address)
英文:
The net.Dialer has Timeout and Deadline fields, and also can use a context with DialContext which allows for timeout and cancelation.
You can refer to DialTimeout to see how to setup the basic Dialer:
func DialTimeout(network, address string, timeout time.Duration) (Conn, error) {
d := Dialer{Timeout: timeout}
return d.Dial(network, address)
}
And an example with a context.Context:
var d Dialer
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
return d.DialContext(ctx, network, address)
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