package main

import (
	"fmt"
	"io"
	"net/http"
	"time"
)

func main() {
	fmt.Println("these partially fail in go 1.17.3:")
	tryClient(&http.Client{Timeout: time.Hour}, 10)

	fmt.Println()

	fmt.Println("these always work:")
	tryClient(&http.Client{}, 10)
}

func tryClient(client *http.Client, n int) {
	for i := 0; i < n; i++ {
		body, err := makeRequest(client)
		if err != nil {
			fmt.Println(err)
			continue
		}
		fmt.Println("body received", len(body))
	}
}

func makeRequest(client *http.Client) ([]byte, error) {
	req, err := http.NewRequest(http.MethodGet, "https://golang.org", nil)
	if err != nil {
		return nil, fmt.Errorf("http.NewRequest: %w", err)
	}
	resp, err := client.Do(req)
	if err != nil {
		return nil, fmt.Errorf("client.Do: %w", err)
	}
	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("io.ReadAll: %w", err)
	}
	err = resp.Body.Close()
	if err != nil {
		return nil, fmt.Errorf("resp.Body.Close: %w", err)
	}
	return body, nil
}