How to send a POST request in Go?

I am trying to make a POST request but I can't get it done. Nothing is received on the other side.

Is this how it is supposed to work? I'm aware of the PostForm function but I think I can't use it because it can't be tested with httputil, right?

hc := http.Client{}
req, err := http.NewRequest("POST", APIURL, nil)

form := url.Values{}
form.Add("ln", c.ln)
form.Add("ip", c.ip)
form.Add("ua", c.ua)
req.PostForm = form
req.Header.Add("Content-Type", "application/x-www-form-urlencoded")

glog.Info("form was %v", form)
resp, err := hc.Do(req)

You have mostly the right idea, it's just the sending of the form that is wrong. The form belongs in the body of the request.

req, err := http.NewRequest("POST", url, strings.NewReader(form.Encode()))

I know this is old but this answer came up in search results. For the next guy - the proposed and accepted answer works, however the code initially submitted in the question is lower-level than it needs to be. Nobody got time for that.

//one-line post request/response...
response, err := http.PostForm(APIURL, url.Values{
	"ln": {c.ln},
	"ip": {c.ip},
	"ua": {c.ua}})

//okay, moving on...
if err != nil {
  //handle postform error
}

defer response.Body.Close()
body, err := ioutil.ReadAll(response.Body)

if err != nil {
  //handle read response error
}

fmt.Printf("%s\n", string(body))

https://golang.org/pkg/net/http/#pkg-overview