How to Set Timeouts on Network Connections in Go

Set timeouts on network connections in Go by configuring the Timeout field on http.Client or using context.WithTimeout for finer control.

ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()

client := &http.Client{
    Timeout: 5 * time.Second,
}

req, err := http.NewRequestWithContext(ctx, http.MethodGet, "https://example.com", nil)
if err != nil {
    // handle error
}
resp, err := client.Do(req)
if err != nil {
    // handle timeout or other error
}

For net.Dial, use net.Dialer with a Timeout field:

dialer := &net.Dialer{Timeout: 5 * time.Second}
conn, err := dialer.Dial("tcp", "example.com:80")
if err != nil {
    // handle error
}

Timeouts prevent your program from waiting forever if a network request hangs. Think of it like setting an alarm on a phone call; if the other person doesn't answer by the time the alarm goes off, the call ends automatically so you can try something else. You use this whenever you connect to external services to ensure your app stays responsive.