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transport.go
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transport.go
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package websocket
import (
"crypto/tls"
"net"
"net/http"
"net/url"
"time"
"github.com/gorilla/websocket"
"github.com/zhuque/go-socket.io/engineio/transport"
"github.com/zhuque/go-socket.io/engineio/transport/utils"
)
// DialError is the error when dialing to a server. It saves Response from
// server.
type DialError struct {
Response *http.Response
error
}
// Transport is websocket transport.
type Transport struct {
ReadBufferSize int
WriteBufferSize int
Subprotocols []string
TLSClientConfig *tls.Config
HandshakeTimeout time.Duration
Proxy func(*http.Request) (*url.URL, error)
NetDial func(network, addr string) (net.Conn, error)
CheckOrigin func(r *http.Request) bool
}
// Default is default transport.
var Default = &Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
// Name is the name of websocket transport.
func (t *Transport) Name() string {
return "websocket"
}
// Dial creates a new client connection.
func (t *Transport) Dial(u *url.URL, requestHeader http.Header) (transport.Conn, error) {
dialer := websocket.Dialer{
ReadBufferSize: t.ReadBufferSize,
WriteBufferSize: t.WriteBufferSize,
NetDial: t.NetDial,
Proxy: t.Proxy,
TLSClientConfig: t.TLSClientConfig,
HandshakeTimeout: t.HandshakeTimeout,
Subprotocols: t.Subprotocols,
}
switch u.Scheme {
case "http":
u.Scheme = "ws"
case "https":
u.Scheme = "wss"
}
query := u.Query()
query.Set("transport", t.Name())
query.Set("t", utils.Timestamp())
u.RawQuery = query.Encode()
c, resp, err := dialer.Dial(u.String(), requestHeader)
if err != nil {
return nil, DialError{
error: err,
Response: resp,
}
}
return newConn(c, *u, resp.Header), nil
}
// Accept accepts a http request and create Conn.
func (t *Transport) Accept(w http.ResponseWriter, r *http.Request) (transport.Conn, error) {
upgrader := websocket.Upgrader{
ReadBufferSize: t.ReadBufferSize,
WriteBufferSize: t.WriteBufferSize,
CheckOrigin: t.CheckOrigin,
}
c, err := upgrader.Upgrade(w, r, w.Header())
if err != nil {
return nil, err
}
return newConn(c, *r.URL, r.Header), nil
}