Yes, it works, thank you. I still not understand why root CA cause problem 
here, but I was expecting for "Client side TLS AUTH" I need to add CA.

On Friday, October 9, 2020 at 12:40:16 PM UTC-4 b.ca...@pobox.com wrote:

> I suspect you may have misunderstood what a "CA Certificate" is.  It's not 
> the Certificate Signing Request (CSR) that you created for your own public 
> key.  It's the public key of the certificate authority which signed the 
> server's certificate (i.e. google.com).
>
> However, since google.com is signed by one of the standard public CAs, 
> you don't need to specify a CA certificate at all, and it will use your 
> system's default set of root CAs.
>
> The following variation of your code works for me.  I removed the client 
> cert/key as well, since google doesn't require you to present a client cert.
>
> package main
>
> import (
>   "fmt"
>   //log "github.com/sirupsen/logrus"
>   "github.com/valyala/fasthttp"
>   "crypto/tls"
>   //"crypto/x509"
>   //"io/ioutil"
> )
>
> func req(method string, url string, data []byte) (int, []byte) {
>     // Setup HTTPS client
>     tlsConfig := &tls.Config{
>       Certificates: []tls.Certificate{},
>     }
>
>   req := fasthttp.AcquireRequest()
>   req.SetRequestURI(url)
>   req.Header.SetMethod(method)
>   req.SetBody(data)
>   resp := fasthttp.AcquireResponse()
>
>   client := &fasthttp.Client{
>     TLSConfig: tlsConfig,
>   }
>   client.Do(req, resp)
>   statusCode := resp.StatusCode()
>   body := resp.Body()
>   return statusCode, body
> }
>
> func main(){
>   a, b := req("GET", "https://google.com";, nil)
>
>   fmt.Printf(string(b))
>   fmt.Println(a)
>
> }
>
> The result:
>
> <HTML><HEAD><meta http-equiv="content-type" 
> content="text/html;charset=utf-8">
> <TITLE>301 Moved</TITLE></HEAD><BODY>
> <H1>301 Moved</H1>
> The document has moved
> <A HREF="https://www.google.com/";>here</A>.
> </BODY></HTML>
> 301
>
> (and if you change https://google.com to https://www.google.com then you 
> get the search page)
>

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