/
web_socket.go
207 lines (180 loc) · 4.86 KB
/
web_socket.go
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package websock
import (
"crypto/tls"
"fmt"
"github.com/civet148/gotools/log"
"github.com/civet148/gotools/parser"
"github.com/civet148/gotools/wss"
"github.com/gin-gonic/gin"
"github.com/gorilla/websocket"
"net/http"
)
type socket struct {
ui *parser.UrlInfo
conn *websocket.Conn
accepting chan *websocket.Conn
closed bool
}
func init() {
_ = wss.Register(wss.SocketType_WEB, NewSocket)
}
func NewSocket(ui *parser.UrlInfo) wss.Socket {
return &socket{
ui: ui,
accepting: make(chan *websocket.Conn, 1000),
}
}
func (s *socket) Listen() (err error) {
engine := gin.Default()
if s.ui.GetPath() == "" {
s.ui.Path = "/"
}
engine.GET(s.ui.Path, s.webSocketRegister)
strCertFile := s.ui.Queries[wss.WSS_TLS_CERT]
strKeyFile := s.ui.Queries[wss.WSS_TLS_KEY]
go func() {
if s.ui.Scheme == wss.URL_SCHEME_WSS {
log.Debugf("listen GET [%s://%s%s] -> cert [%s] key [%s]", s.ui.Scheme, s.ui.Host, s.ui.Path, strCertFile, strKeyFile)
err = engine.RunTLS(s.ui.Host, strCertFile, strKeyFile)
} else {
log.Debugf("listen GET [%s://%s%s]", s.ui.Scheme, s.ui.Host, s.ui.Path)
err = engine.Run(s.ui.Host)
}
if err != nil {
s.closed = true
log.Errorf("listen websocket closing with error [%v]", err.Error())
return
}
}()
return
}
func (s *socket) Accept() wss.Socket {
var c *websocket.Conn
select {
case c = <-s.accepting:
{
log.Debugf("accepted client [%v]", c.RemoteAddr().String())
c.SetCloseHandler(s.webSocketCloseHandler)
c.SetPingHandler(s.websocketPingHandler)
c.SetPongHandler(s.websocketPongHandler)
return &socket{
conn: c,
ui: s.ui,
}
}
}
return nil
}
func (s *socket) Connect() (err error) {
url := fmt.Sprintf("%v://%v%v", s.ui.Scheme, s.ui.Host, s.ui.Path)
log.Debugf("connect to url [%v]", url)
dialer := &websocket.Dialer{}
if s.ui.Scheme == wss.URL_SCHEME_WSS {
dialer.TLSClientConfig = &tls.Config{RootCAs: nil, InsecureSkipVerify: true}
}
if s.conn, _, err = dialer.Dial(url, nil); err != nil {
log.Errorf(err.Error())
return
}
return
}
func (s *socket) Send(data []byte, to ...string) (n int, err error) {
if s.conn == nil {
err = fmt.Errorf("web socket connection is nil")
return
}
if err = s.conn.WriteMessage(websocket.BinaryMessage, data); err != nil {
return
}
n = len(data)
log.Debugf("data [%v] length [%v]", string(data), n)
return
}
func (s *socket) Recv(length int) (data []byte, from string, err error) {
if s.conn == nil {
err = fmt.Errorf("web socket connection is nil")
return
}
var msgType int
if msgType, data, err = s.conn.ReadMessage(); err != nil {
log.Errorf(err.Error())
return
}
s.debugMessageType(msgType)
from = s.conn.RemoteAddr().String()
return
}
func (s *socket) Close() (err error) {
if s.closed {
err = fmt.Errorf("socket already closed")
return
}
s.closed = true
if s.conn == nil {
err = fmt.Errorf("socket is nil")
log.Error(err.Error())
return
}
s.closed = true
return s.conn.Close()
}
func (s *socket) GetLocalAddr() (addr string) {
if s.conn == nil {
return s.ui.Host //web socket server connection is nil
}
addr = s.conn.LocalAddr().String()
return
}
func (s *socket) GetRemoteAddr() (addr string) {
if s.conn == nil {
return //web socket client connection can't be nil
}
addr = s.conn.RemoteAddr().String()
return
}
func (s *socket) GetSocketType() wss.SocketType {
return wss.SocketType_WEB
}
func (s *socket) debugMessageType(msgType int) {
switch msgType {
case websocket.TextMessage:
log.Debugf("message type [TextMessage]")
case websocket.BinaryMessage:
log.Debugf("message type [BinaryMessage]")
case websocket.CloseMessage:
log.Debugf("message type [CloseMessage]")
case websocket.PingMessage:
log.Debugf("message type [PingMessage]")
case websocket.PongMessage:
log.Debugf("message type [PongMessage]")
}
}
func (s *socket) webSocketRegister(ctx *gin.Context) {
var err error
log.Debugf("request ctx [%v]", ctx)
upGrader := &websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool {
return true
},
Subprotocols: []string{ctx.GetHeader("Sec-WebSocket-Protocol")},
}
var c *websocket.Conn
if c, err = upGrader.Upgrade(ctx.Writer, ctx.Request, nil); err != nil {
log.Errorf(err.Error())
return
}
log.Debugf("client [%v] registered", c.RemoteAddr().String())
s.accepting <- c
}
func (s *socket) webSocketCloseHandler(code int, text string) (err error) {
log.Debugf("close code [%v] text [%v]", code, text)
return
}
func (s *socket) websocketPingHandler(appData string) (err error) {
log.Debugf("ping app data [%v]", appData)
return
}
func (s *socket) websocketPongHandler(appData string) (err error) {
log.Debugf("pong app data [%v]", appData)
return
}