You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
1.5 KiB
Go
83 lines
1.5 KiB
Go
package slack
|
|
|
|
import (
|
|
"crypto/tls"
|
|
"errors"
|
|
"net"
|
|
"net/http"
|
|
"net/http/httputil"
|
|
"net/url"
|
|
"os"
|
|
"strings"
|
|
|
|
"golang.org/x/net/websocket"
|
|
)
|
|
|
|
// Taken and reworked from: https://gist.github.com/madmo/8548738
|
|
func websocketHTTPConnect(proxy, urlString string) (net.Conn, error) {
|
|
p, err := net.Dial("tcp", proxy)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
turl, err := url.Parse(urlString)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
req := http.Request{
|
|
Method: "CONNECT",
|
|
URL: &url.URL{},
|
|
Host: turl.Host,
|
|
}
|
|
|
|
cc := httputil.NewProxyClientConn(p, nil)
|
|
if _, err := cc.Do(&req); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
rwc, _ := cc.Hijack()
|
|
|
|
return rwc, nil
|
|
}
|
|
|
|
func websocketProxyDial(urlString, origin string) (ws *websocket.Conn, err error) {
|
|
if os.Getenv("HTTP_PROXY") == "" {
|
|
return websocket.Dial(urlString, "", origin)
|
|
}
|
|
|
|
purl, err := url.Parse(os.Getenv("HTTP_PROXY"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
config, err := websocket.NewConfig(urlString, origin)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
client, err := websocketHTTPConnect(purl.Host, urlString)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
switch config.Location.Scheme {
|
|
case "ws":
|
|
case "wss":
|
|
tlsClient := tls.Client(client, &tls.Config{
|
|
ServerName: strings.Split(config.Location.Host, ":")[0],
|
|
})
|
|
err := tlsClient.Handshake()
|
|
if err != nil {
|
|
tlsClient.Close()
|
|
return nil, err
|
|
}
|
|
client = tlsClient
|
|
|
|
default:
|
|
return nil, errors.New("invalid websocket schema")
|
|
}
|
|
|
|
return websocket.NewClient(config, client)
|
|
}
|