forked from ninjasphere/driver-go-chromecast
/
driver.go
163 lines (121 loc) · 3.1 KB
/
driver.go
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package main
import (
"net"
"regexp"
"strings"
"sync"
"time"
"github.com/huin/goupnp"
"github.com/jonaz/mdns"
"github.com/ninjasphere/go-castv2"
"github.com/ninjasphere/go-ninja/api"
"github.com/ninjasphere/go-ninja/logger"
"github.com/ninjasphere/go-ninja/support"
)
var info = ninja.LoadModuleInfo("./package.json")
var log = logger.GetLogger(info.Name)
type Driver struct {
support.DriverSupport
devices map[string]*MediaPlayer
addLock sync.Mutex
}
func NewDriver() (*Driver, error) {
driver := &Driver{
devices: make(map[string]*MediaPlayer),
}
err := driver.Init(info)
if err != nil {
log.Fatalf("Failed to initialize driver: %s", err)
}
err = driver.Export(driver)
if err != nil {
log.Fatalf("Failed to export driver: %s", err)
}
return driver, nil
}
func (d *Driver) Start(_ interface{}) error {
log.Infof("Driver Starting")
d.startMDNSDiscovery()
d.startUPNPDiscovery()
return nil
}
func (d *Driver) startMDNSDiscovery() {
castService := "_googlecast._tcp"
// Make a channel for results and start listening
entriesCh := make(chan *mdns.ServiceEntry, 4)
go func() {
for entry := range entriesCh {
log.Debugf("Found mdns service: %v", entry)
if !strings.Contains(entry.Name, castService) {
return
}
err := d.add(entry.Addr, entry.Port, parseMdnsInfo(entry.Info))
if err != nil {
log.Fatalf("Failed to connect to chromecast %s", entry.Addr)
}
}
}()
go func() {
// Start the lookup
mdns.Lookup(castService, entriesCh)
}()
}
func (d *Driver) startUPNPDiscovery() {
go func() {
for {
devices, err := goupnp.DiscoverDevices("urn:dial-multiscreen-org:service:dial:1")
if err == nil {
for _, dev := range devices {
info := parseUpnpInfo(dev.Root)
ip := strings.TrimSuffix(strings.TrimPrefix(dev.Root.URLBaseStr, "http://"), ":8008")
d.add(net.ParseIP(ip), 8009, info)
}
}
time.Sleep(time.Second * 30)
}
}()
}
func (d *Driver) add(host net.IP, port int, info map[string]string) error {
d.addLock.Lock()
defer d.addLock.Unlock()
if _, ok := d.devices[info["id"]]; ok {
log.Infof("Already found id:%s name:%s", info["id"], info["fn"])
// We already have this one.
// TODO: Update IP
return nil
}
log.Infof("Found new chromecast id:%s name:%s", info["id"], info["fn"])
client, err := castv2.NewClient(host, port)
if err != nil {
return err
}
device, err := NewMediaPlayer(d, d.Conn, info, client)
if err != nil {
client.Close()
return err
}
d.devices[info["id"]] = device
return nil
}
func parseMdnsInfo(field string) map[string]string {
vals := make(map[string]string)
for _, part := range strings.Split(field, "|") {
chunks := strings.Split(part, "=")
if len(chunks) == 2 {
vals[chunks[0]] = chunks[1]
}
}
vals["discovered"] = "MDNS"
return vals
}
func parseUpnpInfo(device *goupnp.RootDevice) map[string]string {
reg, _ := regexp.Compile("[^a-f0-9]+")
id := strings.TrimPrefix(device.Device.UDN, "uuid:")
id = reg.ReplaceAllString(id, "")
vals := map[string]string{
"fn": device.Device.FriendlyName,
"id": id,
"discovered": "UPNP",
}
return vals
}