cep21

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/http/httptest"
	"net/http/httptrace"
	"os"
)

cep21

type ClientTrace struct {
	// GetConn is called before a connection is created or
	// retrieved from an idle pool. The hostPort is the
	// "host:port" of the target or proxy. GetConn is called even
	// if there's already an idle cached connection available.
	GetConn func(hostPort string)

	// GotConn is called after a successful connection is
	// obtained. There is no hook for failure to obtain a
	// connection; instead, use the error from

cep21

type ClientTrace struct {
	// Called before a connection is established.  If it returns a
	// non nil object, that object is used instead for the Connection.
	GetConn func(hostPort string) *net.Conn
}

cep21

type ClientTrace struct {
	// Called before a connection is established.  The returned context is used
	// to finish processing the request.
	GetConn func(ctx context.Context, hostPort string) context.Context
}

cep21

type Request struct {
	Method string
	URL *url.URL
	// ...
	// Trace callbacks are executed if they are set
	Trace ClientTrace
}
  

cep21

type ClientTrace struct {
	Log(state string)
}

cep21

	if trace != nil && trace.WroteHeaders != nil {
		trace.WroteHeaders()
	}

cep21

package customer

type User struct {
  Name string
}

type Item struct {
  Price float64
}

cep21

package cart

import "customer"

type Client struct {
}

func (c *Client) Purchase(who *customer.User, what *customer.Item) {
}

cep21

package customer

type User struct {
  Name string
}