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44-concurrent-http-get.go
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44-concurrent-http-get.go
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package main
import (
"fmt"
"errors"
"io/ioutil"
"net/http"
"os"
"time"
)
func http_get(addr string) (r string, err error) {
t1 := time.Now()
resp, err := http.Get(addr)
if err != nil {
t2 := time.Now()
return fmt.Sprintf("[%s] Get %s [%s] msg: %s cost time: %s", t2.Format(time.RFC3339), addr, "failed.", "connet failed.", t2.Sub(t1)),
errors.New("connet failed.")
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
t2 := time.Now()
return fmt.Sprintf("[%s] Get %s [%s] msg: %s cost time: %s", t2.Format(time.RFC3339), addr, "failed.", "Read body failed.", t2.Sub(t1)),
errors.New("Read Body failed.")
}
defer resp.Body.Close()
t2 := time.Now()
return fmt.Sprintf("[%s] Get %s [%s] msg: %s cost time: %s", t2.Format(time.RFC3339), addr, "success", body, t2.Sub(t1)), err
}
func main() {
if len(os.Args) < 2 {
return
} else {
ch := make(chan string, 1)
for i := 1; i < len(os.Args); i++ {
url := os.Args[i]
go func(u string) {
r, _ := http_get(u)
ch <- r
}(url)
}
//check result
for i := 1; i < len(os.Args); i++ {
fmt.Println(<-ch)
}
}
}