Created
April 2, 2020 19:09
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package main | |
import ( | |
"fmt" | |
"net" | |
"os" | |
"strconv" | |
"time" | |
) | |
func dns_request(c chan string, order int) { | |
var err error | |
var ip []net.IP | |
for i := 0; ; i++ { | |
//Lookup dns | |
ip, err = net.LookupIP("app.demandbase.com") | |
if err != nil { | |
panic(err) | |
} | |
c <- fmt.Sprintf("[%d] dns thread:%d; lookup: %s", i, order, ip) | |
} | |
} | |
func printer(c chan string, v int) { | |
for { | |
msg := <-c | |
if v == 1 { | |
fmt.Println(msg) | |
} | |
time.Sleep(time.Millisecond * 100) | |
} | |
} | |
func main() { | |
if os.Args[1] != "-t" { | |
panic("usage: ./program -t <threads> -v 1") | |
} | |
if os.Args[3] != "-v" { | |
panic("usage: ./program -t <threads> -v 1") | |
} | |
THREADS, _ := strconv.Atoi(os.Args[2]) | |
VERBOSE, _ := strconv.Atoi(os.Args[4]) | |
var thread_order int = 0 | |
var c chan string = make(chan string) | |
for i := 0; i < THREADS; i++ { | |
go dns_request(c, thread_order) | |
go printer(c, VERBOSE) | |
thread_order++ | |
} | |
var input string | |
fmt.Scanln(&input) | |
} |
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