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//
// dolmetschctl
//
//
// Copyright (C) 2019 Christian Pointner <equinox@spreadspace.org>
//
// This file is part of dolmetschctl.
//
// dolmetschctl 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.
//
// dolmetschctl 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 dolmetschctl. If not, see <http://www.gnu.org/licenses/>.
//
package main
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"time"
"github.com/gorilla/websocket"
"spreadspace.org/dolmetschctl/pkg/controller"
"spreadspace.org/dolmetschctl/pkg/types"
)
func wsReader(ws *websocket.Conn, ch chan<- types.WebSocketResponseFull) {
defer close(ch)
for {
t, r, err := ws.NextReader()
if err != nil {
log.Println("websocket disconnected:", err)
return
}
switch t {
case websocket.TextMessage:
var msg types.WebSocketResponseFull
dec := json.NewDecoder(r)
dec.DisallowUnknownFields()
if err := dec.Decode(&msg); err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
log.Println("webclient response parse error:", err)
return
}
ch <- msg
case websocket.BinaryMessage:
io.Copy(ioutil.Discard, r) // consume all the data
}
}
return
}
func run(ctrl *controller.Controller, ws *websocket.Conn) error {
ctrlCh := make(chan controller.Event, 100)
ctrl.Subscribe(ctrlCh)
wsCh := make(chan types.WebSocketResponseFull)
go wsReader(ws, wsCh)
if err := ws.WriteJSON(types.WebSocketRequest{Command: "subscribe"}); err != nil {
return err
}
for {
select {
case ev, ok := <-ctrlCh:
if !ok {
return fmt.Errorf("controller channel was closed.")
}
log.Printf("got controller event: %v", ev)
case msg, ok := <-wsCh:
if !ok {
return fmt.Errorf("websocket channel was closed.")
}
log.Printf("got message from websocket: %v", msg)
}
}
return nil
}
func main() {
log.Println("hello world.")
c, err := controller.NewController(controller.Config{Dev: "dolmetsch controller"})
if err != nil {
log.Printf("Error opening the controller: %v", err)
os.Exit(1)
}
defer c.Shutdown()
if err = c.Init(); err != nil {
log.Printf("Error initializeing the controller: %v", err)
os.Exit(1)
}
log.Printf("controller successfully initialized!")
for {
ws, _, err := websocket.DefaultDialer.Dial("ws://127.0.0.1:8234/api/v1/socket", nil)
if err != nil {
log.Printf("Error connecting to daemon: %v", err)
} else {
err := run(c, ws)
log.Printf("run() returned: %v", err)
}
log.Printf("will retry in one second...")
time.Sleep(time.Second)
}
log.Printf("exiting.")
}
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