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peep.go
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peep.go
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package main
import (
"flag"
"fmt"
"runtime"
"sync"
"time"
"github.com/hum/peep/pkg/colour"
"github.com/hum/peep/pkg/domain"
"github.com/hum/peep/pkg/lookup"
)
var (
domainName string
workerPool int
runningWorkers int
wg sync.WaitGroup
availableCount int
takenCount int
)
const (
IS_TAKEN = "[❌] "
IS_AVAILABLE = "[✅] "
)
func resolve(in <-chan string, out chan<- string, wg *sync.WaitGroup) {
defer func() {
wg.Done()
runningWorkers--
}()
for dn := range in {
taken, err := lookup.IsTaken(dn)
if err != nil {
fmt.Printf("error for domain: %s, got error: %s\n", dn, err)
continue
}
var result string
if taken {
// Domain is taken
result = fmt.Sprintf("%s %s", IS_TAKEN, dn)
result = colour.SetColour(colour.ColourRed, result)
takenCount++
} else {
// Domain is free
result = fmt.Sprintf("%s %s", IS_AVAILABLE, dn)
result = colour.SetColour(colour.ColourGreen, result)
availableCount++
}
out <- result
}
}
func main() {
var maxWorkerPool int = runtime.GOMAXPROCS(0) * 2
flag.StringVar(&domainName, "domain", "", "domain name to look up")
flag.StringVar(&domainName, "d", "", "domain name to look up")
flag.IntVar(&workerPool, "jobs", maxWorkerPool, "sets the amount of coroutines")
flag.IntVar(&workerPool, "j", maxWorkerPool, "sets the amount of coroutines")
flag.Parse()
if domainName == "" {
fmt.Println("no domain name provided")
flag.Usage()
return
}
in := make(chan string, len(domain.Extensions))
out := make(chan string, len(domain.Extensions))
// Initialise worker pool
for i := 0; i < workerPool; i++ {
wg.Add(1)
runningWorkers++
go resolve(in, out, &wg)
}
fmt.Printf("Searching TLDs for domain name: %s\n", colour.SetColour(colour.ColourYellow, domainName))
start := time.Now()
for _, dn := range domain.Extensions {
in <- fmt.Sprintf("%s%s", domainName, dn)
}
// Close input channel since all inputs have been sent already
close(in)
// Inline goroutine to print out the output
wg.Add(1)
go func(output <-chan string, wg *sync.WaitGroup) {
defer wg.Done()
for {
select {
case result := <-output:
fmt.Println(result)
default:
// Once all workers are finished, there won't be any more results
if runningWorkers == 0 {
return
}
}
}
}(out, &wg)
wg.Wait()
close(out)
end := time.Now()
dt := end.Sub(start)
response := fmt.Sprintf("query took: %s, performed %d queries -- %d available, %d taken",
dt,
len(domain.Extensions),
availableCount,
takenCount,
)
fmt.Println(colour.SetColour(colour.ColourYellow, response))
}