shad-go/lectures/06-http/keepalive/correct/correct.go

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2020-04-02 11:42:31 +00:00
package main
import (
"fmt"
"io"
"io/ioutil"
"net/http"
"sync"
)
func main() {
urls := []string{"https://golang.org/doc", "https://golang.org/pkg", "https://golang.org/help"}
client := &http.Client{
Transport: &http.Transport{
MaxConnsPerHost: 100,
},
}
var wg sync.WaitGroup
for _, url := range urls {
wg.Add(1)
go func(url string) {
defer wg.Done()
resp, err := client.Get(url)
if err != nil {
fmt.Printf("%s: %s\n", url, err)
return
}
defer resp.Body.Close()
_, _ = io.Copy(ioutil.Discard, resp.Body)
fmt.Printf("%s - %d\n", url, resp.StatusCode)
}(url)
}
wg.Wait()
}