129 lines
3.3 KiB
Go
129 lines
3.3 KiB
Go
package ipc
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"net"
|
|
"net/http"
|
|
"strconv"
|
|
)
|
|
|
|
type PlaybackHandler interface {
|
|
PlayPause()
|
|
Stop()
|
|
Pause()
|
|
Continue()
|
|
SeekBackOrPrevious()
|
|
SeekNext()
|
|
SeekSeconds(float64)
|
|
SeekBySeconds(float64)
|
|
Volume() int
|
|
SetVolume(int)
|
|
}
|
|
|
|
type IPCServer interface {
|
|
Serve(net.Listener) error
|
|
Shutdown(context.Context) error
|
|
}
|
|
|
|
type serverImpl struct {
|
|
server *http.Server
|
|
pbHandler PlaybackHandler
|
|
showFn func()
|
|
quitFn func()
|
|
}
|
|
|
|
func NewServer(pbHandler PlaybackHandler, showFn, quitFn func()) IPCServer {
|
|
s := &serverImpl{pbHandler: pbHandler, showFn: showFn, quitFn: quitFn}
|
|
s.server = &http.Server{
|
|
Handler: s.createHandler(),
|
|
}
|
|
return s
|
|
}
|
|
|
|
func (s *serverImpl) Serve(listener net.Listener) error {
|
|
return s.server.Serve(listener)
|
|
}
|
|
|
|
func (s *serverImpl) Shutdown(ctx context.Context) error {
|
|
err := s.server.Shutdown(ctx)
|
|
DestroyConn()
|
|
return err
|
|
}
|
|
|
|
func (s *serverImpl) createHandler() http.Handler {
|
|
m := http.NewServeMux()
|
|
m.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
w.WriteHeader(http.StatusNotFound)
|
|
w.Write([]byte("The given path is not valid"))
|
|
})
|
|
m.HandleFunc(PingPath, s.makeSimpleEndpointHandler(func() {}))
|
|
m.HandleFunc(ShowPath, s.makeSimpleEndpointHandler(func() {
|
|
s.showFn()
|
|
}))
|
|
m.HandleFunc(QuitPath, s.makeSimpleEndpointHandler(func() {
|
|
s.quitFn()
|
|
}))
|
|
m.HandleFunc(PlayPath, s.makeSimpleEndpointHandler(s.pbHandler.Continue))
|
|
m.HandleFunc(PausePath, s.makeSimpleEndpointHandler(s.pbHandler.Pause))
|
|
m.HandleFunc(PlayPausePath, s.makeSimpleEndpointHandler(s.pbHandler.PlayPause))
|
|
m.HandleFunc(StopPath, s.makeSimpleEndpointHandler(s.pbHandler.Stop))
|
|
m.HandleFunc(PreviousPath, s.makeSimpleEndpointHandler(s.pbHandler.SeekBackOrPrevious))
|
|
m.HandleFunc(NextPath, s.makeSimpleEndpointHandler(s.pbHandler.SeekNext))
|
|
m.HandleFunc(TimePosPath, s.makeFloatEndpointHandler("s", s.pbHandler.SeekSeconds))
|
|
m.HandleFunc(SeekByPath, s.makeFloatEndpointHandler("s", s.pbHandler.SeekBySeconds))
|
|
m.HandleFunc(VolumePath, func(w http.ResponseWriter, r *http.Request) {
|
|
v := r.URL.Query().Get("v")
|
|
if vol, err := strconv.Atoi(v); err == nil {
|
|
s.pbHandler.SetVolume(vol)
|
|
s.writeOK(w)
|
|
} else {
|
|
s.writeErr(w, err)
|
|
}
|
|
})
|
|
m.HandleFunc(VolumeAdjustPath, s.makeFloatEndpointHandler("pct", func(pct float64) {
|
|
vol := s.pbHandler.Volume()
|
|
vol = vol + int(float64(vol)*(pct/100))
|
|
s.pbHandler.SetVolume(vol) // will clamp to range for us
|
|
}))
|
|
return m
|
|
}
|
|
|
|
func (s *serverImpl) makeSimpleEndpointHandler(f func()) func(http.ResponseWriter, *http.Request) {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
f()
|
|
s.writeOK(w)
|
|
}
|
|
}
|
|
|
|
func (s *serverImpl) makeFloatEndpointHandler(queryParam string, f func(float64)) func(http.ResponseWriter, *http.Request) {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
v := r.URL.Query().Get(queryParam)
|
|
if val, err := strconv.ParseFloat(v, 64); err == nil {
|
|
f(val)
|
|
s.writeOK(w)
|
|
} else {
|
|
s.writeErr(w, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *serverImpl) writeOK(w http.ResponseWriter) (int, error) {
|
|
var r Response
|
|
b, err := json.Marshal(&r)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return w.Write(b)
|
|
}
|
|
|
|
func (s *serverImpl) writeErr(w http.ResponseWriter, err error) (int, error) {
|
|
r := Response{Error: err.Error()}
|
|
b, err := json.Marshal(&r)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
w.WriteHeader(http.StatusInternalServerError)
|
|
return w.Write(b)
|
|
}
|