[question] How to get response header in client.go

[fbens]

Describe the problem you're having

A clear and concise description of what the bug is.
How can I get the response header in client.go
…

Versions

Go version: go version
go version go1.12.7 windows/amd64
…

"Show me the code!"

A minimal code snippet can be useful, otherwise we're left guessing!
…

// client.go
package main

import (
	"flag"
	"fmt"
	"log"
	"net/http"
	"net/url"
	"os"
	"os/signal"
	"encoding/json"

	"github.com/gorilla/websocket"
)

var (
	addr = flag.String("addr", "127.0.0.1:17505", "http service address")
	path = flag.String("path", "/ws", "ws path")
	auth = flag.String("auth", "","auth key")
	data = flag.String("data", "ping","put data,eg: ping")
)

func usage() {
	fmt.Printf("Usage Example: %s -data 'ping'\n", os.Args[0])
	fmt.Printf("Usage Example: %s -data '%s'\n", os.Args[0],
		`{reqid:"10000",eid:"11111",action:"on",uptime:"1111111"}`)
	flag.PrintDefaults()
}

func init(){
	flag.Usage = usage
}

func main() {
	flag.Parse()

	log.SetFlags(0)

	interrupt := make(chan os.Signal, 1)
	signal.Notify(interrupt, os.Interrupt)

	u := url.URL{Scheme: "ws", Host: *addr, Path: *path}
	log.Printf("connecting to %s", u.String())
	
	h := http.Header{"X-Websocket-Key": []string{*auth} }
	c, _, err := websocket.DefaultDialer.Dial(u.String(), h)
	if err != nil {
		log.Fatal("dial:", err)
	}
	defer c.Close()

	// print request header
	h2, _ := json.Marshal(h)
	fmt.Printf("request header: %s\n",h2)

	done := make(chan struct{})
	

	go func() {
		defer close(done)
		for {
			_, message, err := c.ReadMessage()
			if err != nil {
				log.Println("read:", err)
				return
			}
			log.Printf("recv: %s", message)
		}
	}()

	err = c.WriteMessage(websocket.TextMessage, []byte(*data))
	if err != nil {
		log.Println("write:", err)
		return
	}
	fmt.Println("send: ",*data)

	for {
		select {
		case <-done:
			return
		case <-interrupt:
			log.Println("interrupt")
			err := c.WriteMessage(websocket.CloseMessage, 
				websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""))
			if err != nil {
				log.Println("write close:", err)
				return
			}
			return
		}
	}
}

[stephenyama]

c, resp, err := websocket.DefaultDialer.Dial(u.String(), h)
header := resp.Header

[fbens]

c, resp, err := websocket.DefaultDialer.Dial(u.String(), h)
header := resp.Header

Cool, Thank you very much. :-)

[elithrar]

Closing as resolved, but let us know if any more questions.