github.com/euank/go@v0.0.0-20160829210321-495514729181/src/net/http/httptrace/example_test.go (about)

     1  // Copyright 2016 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package httptrace_test
     6  
     7  import (
     8  	"fmt"
     9  	"net/http"
    10  	"net/http/httptrace"
    11  )
    12  
    13  func Example() {
    14  	req, _ := http.NewRequest("GET", "http://example.com", nil)
    15  	trace := &httptrace.ClientTrace{
    16  		GotConn: func(connInfo httptrace.GotConnInfo) {
    17  			fmt.Printf("Got Conn: %+v\n", connInfo)
    18  		},
    19  		DNSDone: func(dnsInfo httptrace.DNSDoneInfo) {
    20  			fmt.Printf("DNS Info: %+v\n", dnsInfo)
    21  		},
    22  	}
    23  	req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
    24  	http.DefaultClient.Do(req)
    25  }