But AFIU, err.Temporary() could be true for other kind of errors that might happen, isn't that a problem if I only want to handle DNS errors?
On Friday, November 25, 2016 at 6:35:59 PM UTC+1, Victor Vrantchan wrote: > > 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://I don't > thinplay.golang.org/p/Ffyg61iDpB <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 >> >> >> -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
