Learning Functional Programming in Go

Launching our makeRequest goroutine

Our Run method launches a Goroutine j.NumRequests times. Each Goroutine runs this code:

go func() {       client := j.Client       j.makeRequest(client)       wg.Done()}()

The makeRequest function is called in a goroutine and passed to the client. We use our Debug logger to indicate that we are about to make a request and record the start time:

func (j *Job) makeRequest(c Client) {       Debug.Printf("makeRequest: ")       start := time.Now()       resp, err := c.Do(j.Request)       if err == nil {              io.Copy(ioutil.Discard, resp.Body)              resp.Body.Close()       }       t := time.Now()       finish := t.Sub(start)       j.responseChan <- &response{              duration:   finish,              err:        err,       }}

The key line is resp, err := c.Do(j.Request).