http.defaultclient.do.go

package main

import (
    "fmt"
    "strings"
    "net/http"
    "io/ioutil"
)

func main() {

    url := "http://mockbin.com/request?foo=bar&foo=baz"

    payload := strings.NewReader("{\"foo\": \"bar\"}")

    req, _ := http.NewRequest("POST", url, payload)

    req.Header.Add("cookie", "foo=bar; bar=baz")
    req.Header.Add("accept", "application/json")
    req.Header.Add("content-type", "application/json")

    res, _ := http.DefaultClient.Do(req)

    defer res.Body.Close()
    body, _ := ioutil.ReadAll(res.Body)

    fmt.Println(res)
    fmt.Println(string(body))

}