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//
// rhimportd
//
// The Radio Helsinki Rivendell Import Daemon
//
//
// Copyright (C) 2015 Christian Pointner <equinox@helsinki.at>
//
// This file is part of rhimportd.
//
// rhimportd is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// rhimportd is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with rhimportd. If not, see <http://www.gnu.org/licenses/>.
//
package main
import (
// "encoding/json"
"fmt"
"github.com/gorilla/websocket"
"helsinki.at/rhimport"
"html"
"net/http"
)
type webSocketRequestData struct {
Command string `json:"COMMAND"`
Id string `json:"ID"`
UserName string `json:"LOGIN_NAME"`
Password string `json:"PASSWORD"`
ShowId uint `json:"SHOW_ID"`
ClearShowCarts bool `json:"CLEAR_SHOW_CARTS"`
MusicPoolGroup string `json:"MUSIC_POOL_GROUP"`
Cart uint `json:"CART_NUMBER"`
ClearCart bool `json:"CLEAR_CART"`
Cut uint `json:"CUT_NUMBER"`
Channels uint `json:"CHANNELS"`
NormalizationLevel int `json:"NORMALIZATION_LEVEL"`
AutotrimLevel int `json:"AUTOTRIM_LEVEL"`
UseMetaData bool `json:"USE_METADATA"`
SourceUri string `json:"SOURCE_URI"`
}
func newWebSocketRequestData(conf *rhimport.Config) *webSocketRequestData {
rd := new(webSocketRequestData)
rd.Command = ""
rd.Id = ""
rd.UserName = ""
rd.Password = ""
rd.ShowId = 0
rd.ClearShowCarts = false
rd.MusicPoolGroup = ""
rd.Cart = 0
rd.ClearCart = false
rd.Cut = 0
rd.Channels = conf.ImportParamDefaults.Channels
rd.NormalizationLevel = conf.ImportParamDefaults.NormalizationLevel
rd.AutotrimLevel = conf.ImportParamDefaults.AutotrimLevel
rd.UseMetaData = conf.ImportParamDefaults.UseMetaData
rd.SourceUri = ""
return rd
}
type webSocketErrorResponseData struct {
ResponseCode int `json:"RESPONSE_CODE"`
ErrorString string `json:"ERROR_STRING"`
}
func sendWebSocketErrorResponse(ws *websocket.Conn, code int, err_str string) {
if err := ws.WriteJSON(webSocketErrorResponseData{code, err_str}); err != nil {
rhdl.Println("WebScoket Client", ws.RemoteAddr(), "write error:", err)
}
}
func webSocketSessionHandler(reqchan <-chan webSocketRequestData, ws *websocket.Conn) {
defer ws.Close()
select {
case reqdata := <-reqchan:
switch reqdata.Command {
case "new":
sendWebSocketErrorResponse(ws, http.StatusNotImplemented, "new session - not yet implemented")
return
case "reconnect":
if reqdata.UserName == "" {
sendWebSocketErrorResponse(ws, http.StatusBadRequest, "missing mandotary field LOGIN_NAME")
return
}
if reqdata.Id == "" {
sendWebSocketErrorResponse(ws, http.StatusBadRequest, "missing mandotary field ID")
return
}
sendWebSocketErrorResponse(ws, http.StatusNotImplemented, "reconnect session - not yet implemented")
return
default:
sendWebSocketErrorResponse(ws, http.StatusBadRequest, fmt.Sprintf("unknown command '%s'", reqdata.Command))
return
}
}
}
func webSocketHandler(conf *rhimport.Config, rddb *rhimport.RdDbChan, sessions *rhimport.SessionStoreChan, trusted bool, w http.ResponseWriter, r *http.Request) {
rhdl.Printf("WebSocketHandler: request for '%s'", html.EscapeString(r.URL.Path))
ws, err := websocket.Upgrade(w, r, nil, 1024, 1024)
if _, ok := err.(websocket.HandshakeError); ok {
http.Error(w, "Not a websocket handshake", 400)
return
} else if err != nil {
rhdl.Println("WebSocket Client", ws.RemoteAddr(), "error:", err)
return
}
rhdl.Println("WebSocket Client", ws.RemoteAddr(), "connected")
reqchan := make(chan webSocketRequestData)
go webSocketSessionHandler(reqchan, ws)
for {
reqdata := newWebSocketRequestData(conf)
if err := ws.ReadJSON(&reqdata); err != nil {
rhdl.Println("WebSocket Client", ws.RemoteAddr(), "disconnected:", err)
return
} else {
rhdl.Printf("Websocket Client %s got: %+v", ws.RemoteAddr(), reqdata)
if trusted {
reqdata.UserName = r.Header.Get("X-Forwarded-User")
}
reqchan <- *reqdata
}
}
return
}
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