go example_test 源码
golang example_test 代码
文件路径：/src/net/http/httptrace/example_test.go
// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package httptrace_test
import (
"fmt"
"log"
"net/http"
"net/http/httptrace"
)
func Example() {
req, _ := http.NewRequest("GET", "http://example.com", nil)
trace := &httptrace.ClientTrace{
GotConn: func(connInfo httptrace.GotConnInfo) {
fmt.Printf("Got Conn: %+v\n", connInfo)
},
DNSDone: func(dnsInfo httptrace.DNSDoneInfo) {
fmt.Printf("DNS Info: %+v\n", dnsInfo)
},
}
req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
_, err := http.DefaultTransport.RoundTrip(req)
if err != nil {
log.Fatal(err)
}
}
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