httpmono.go

package main
                
import (
        "bytes"
        "io/ioutil"
        "log"
        "net/http"
        "time"
)       
        
var tr = http.DefaultTransport.(*http.Transport).Clone()
        
func main() {
        tr.IdleConnTimeout = 5 * time.Second
        for {   
                req()
                time.Sleep(time.Second)
        }       
}       
                
func req() {    
        req, _ := http.NewRequest("GET", "https://http1.golang.org/reqinfo", nil)
        res, err := tr.RoundTrip(req)
        if err != nil { 
                log.Printf("error: %v", err)
                return
        }       
        slurp, err := ioutil.ReadAll(res.Body)
        if i := bytes.Index(slurp, []byte("RequestURI:")); i != -1 {
                slurp = slurp[:i]
        }       
        log.Printf("got: %v, %q", res.Status, slurp)
}                       

Please also be prepared to handle the error from slurp on line 28:

        slurp, err := ioutil.ReadAll(res.Body)
        if err != nil { 
                log.Printf("error: %v", err)
                return
        }  
        if i := bytes.Index(slurp, []byte("RequestURI:")); i != -1 {
                slurp = slurp[:i]
        }