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// +build OMIT
package main
import (
"fmt"
"log"
"net/http"
"net/http/httptrace"
)
func trace() {
// START OMIT
req, _ := http.NewRequest("GET", "http://example.com", nil)
trace := &httptrace.ClientTrace{
DNSDone: func(dnsInfo httptrace.DNSDoneInfo) {
fmt.Printf("DNS Info: %+v\n", dnsInfo)
},
GotConn: func(connInfo httptrace.GotConnInfo) {
fmt.Printf("Got Conn: %+v\n", connInfo)
},
}
req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
if _, err := http.DefaultTransport.RoundTrip(req); err != nil {
log.Fatal(err)
}
// END OMIT
}
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