func (proxy *Proxy) HandleWebSocket(clientWS *websocket.Conn) {
req := clientWS.Request()
req.ParseForm()
req.Form.Get("app")
clientAddress := clientWS.RemoteAddr()
appId := req.Form.Get("app")
extractAuthTokenFromUrl := func(u *url.URL) string {
authorization := ""
queryValues := u.Query()
if len(queryValues["authorization"]) == 1 {
authorization = queryValues["authorization"][0]
}
return authorization
}
authToken := clientWS.Request().Header.Get("Authorization")
if authToken == "" {
authToken = extractAuthTokenFromUrl(req.URL)
}
if authorized, errorMessage := proxy.isAuthorized(appId, authToken, clientAddress); !authorized {
data, err := proto.Marshal(errorMessage)
if err != nil {
proxy.logger.Errorf("Error marshalling log message: %s", err)
}
websocket.Message.Send(clientWS, data)
clientWS.Close()
return
}
defer clientWS.Close()
proxy.logger.Debugf("Output Proxy: Request for app: %v", req.Form.Get("app"))
serverWSs := make([]*websocket.Conn, len(proxy.hashers))
for index, hasher := range proxy.hashers {
proxy.logger.Debugf("Output Proxy: Servers in group [%v]: %v", index, hasher.LoggregatorServers())
server := hasher.GetLoggregatorServerForAppId(appId)
proxy.logger.Debugf("Output Proxy: AppId is %v. Using server: %v", appId, server)
config, err := websocket.NewConfig("ws://"+server+req.URL.RequestURI(), "http://localhost")
if err != nil {
proxy.logger.Errorf("Output Proxy: Error creating config for websocket - %v", err)
}
serverWS, err := websocket.DialConfig(config)
if err != nil {
proxy.logger.Errorf("Output Proxy: Error connecting to loggregator server - %v", err)
}
if serverWS != nil {
serverWSs[index] = serverWS
}
}
proxy.forwardIO(serverWSs, clientWS)
}
func (handler *handler) HandleWebSocket(appId, requestUri string, hashers []*hasher.Hasher) {
defer handler.clientWS.WriteControl(websocket.CloseMessage, []byte{}, time.Now().Add(100*time.Millisecond))
handler.logger.Debugf("Ouxtput Proxy: Request for app: %v", appId)
serverWSs := make([]*websocket.Conn, len(hashers))
for index, hasher := range hashers {
handler.logger.Debugf("Output Proxy: Servers in group [%v]: %v", index, hasher.LoggregatorServers())
server := hasher.GetLoggregatorServerForAppId(appId)
handler.logger.Debugf("Output Proxy: AppId is %v. Using server: %v", appId, server)
serverWS, _, err := websocket.DefaultDialer.Dial("ws://"+server+requestUri, http.Header{})
if err != nil {
handler.logger.Errorf("Output Proxy: Error connecting to loggregator server - %v", err)
} else if serverWS != nil {
serverWSs[index] = serverWS
}
}
handler.forwardIO(serverWSs)
}