Golang本机HTTP客户端挂在特定的URI上

Question

This is a small peace of code:

//resp, err := http.Get("https://alfabank.ru")
resp, err := http.Get("https://google.com")
if err != nil {
    log.Fatalln(err)
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
    log.Fatalln(err)
}
fmt.Println(string(body))

It works fine with Google, but hangs on alfabank (try to uncomment first line and comment second). I can't figure out on which side this problem :( But, for example,

curl https://alfabank.ru

works fine.

So, I think, that the problem in Golang client.

I tried to use tcpdump and see infinite traffic between my machine and remote server.

Could you help me to figure out the problem?

UPDATE: following the advice from comments

Ok, curl sends this headers:

> GET / HTTP/1.1
> Host: alfabank.ru
> User-Agent: curl/7.54.0
> Accept: */*

So, I tried

req, err := http.NewRequest(http.MethodGet, "http://alfabank.ru", nil)
if err != nil {
    log.Fatalln(err)
}
req.Header.Add("Accept", "*/*")
req.Header.Add("User-Agent", "curl/7.54.0")

client := http.Client{}
resp, err := client.Do(req)

It doesn't solve the problem.

Answer 1

SOLUTION:

Thank you to JimB, problem in http2 protocol.

So, disabling http2 helps me to solve the problem:

http.DefaultClient.Transport = &http.Transport{
    TLSNextProto: make(map[string]func(authority string, c *tls.Conn) http.RoundTripper),
}