In Go, you can check if a type satisfies a particular behavior by declaring
an interface, and then checking if the type satisfies that interface.
In your case, you can check if the error is `Temporrary()` or not.
See this snippet as an example: https://play.golang.org/p/Ffyg61iDpB
I
recommend
https://dave.cheney.net/2016/04/27/dont-just-check-errors-handle-them-gracefully
and.or the GopherCon talk https://www.youtube.com/watch?v=lsBF58Q-DnY by
Dave Cheney for a more in-depth presentation of this idea.
On Friday, November 25, 2016 at 12:00:06 PM UTC-5, mb.dha...@gmail.com
wrote:
>
> This is a question about the net/http API, Googling was not very helpful.
>
> _, err := http.Get("https://random_non_existing_domain.com;)
>
>
> Following code will obviously fail, but how can I check if it failed
> because of DNS error not because a billion other things that might have
> gone wrong?
>
> I tried this, (mostly as a shot in the dark)
>
> if e, ok := err.(net.Error); ok {
> fmt.Println("dial error", e.Temporary())
> }
> if e, ok := err.(*net.AddrError); ok {
> fmt.Println("addr rror", e.Temporary())
> }
> if e, ok := err.(*net.DNSError); ok {
> fmt.Println(e)
>
> and it seems to print
>
>dial error false
>
> Is there any easy way to do what I'm trying to achieve?
>
> -
> dbalan
> @notmycommit
>
>
>
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