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stream.go
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stream.go
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package tibber
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
"time"
"github.com/gorilla/websocket"
log "github.com/sirupsen/logrus"
)
const subscriptionEndpoint = "v1-beta/gql/subscriptions"
const tibberHost = "api.tibber.com"
const (
StreamStateConnected = "CONNECTED"
StreamStateConnecting = "CONNECTING"
StreamStateDisconnected = "DISCONNECTED"
)
// MsgChan for receiving messages
type MsgChan chan *StreamMsg
// StreamMsg for streams
type StreamMsg struct {
HomeID string `json:"homeId"`
Type string `json:"type"`
ID int `json:"id"`
Payload Payload `json:"payload"`
}
type StreamState struct {
State string
Err error
}
// Payload in StreamMsg
type Payload struct {
Data Data `json:"data"`
}
// Data in Payload
type Data struct {
LiveMeasurement LiveMeasurement `json:"liveMeasurement"`
}
// LiveMeasurement in data payload
type LiveMeasurement struct {
Timestamp time.Time `json:"timestamp"`
Power float64 `json:"power"`
LastMeterConsumption float64 `json:"lastMeterConsumption"`
LastMeterProduction float64 `json:"lastMeterProduction"`
AccumulatedConsumption float64 `json:"accumulatedConsumption"`
AccumulatedConsumptionLastHour float64 `json:"accumulatedConsumptionLastHour"`
AccumulatedProductionLastHour float64 `json:"accumulatedProductionLastHour"`
AccumulatedCost float64 `json:"accumulatedCost"`
AccumulatedProduction float64 `json:"accumulatedProduction"`
AccumulatedReward float64 `json:"accumulatedReward"`
MinPower float64 `json:"minPower"`
AveragePower float64 `json:"averagePower"`
MaxPower float64 `json:"maxPower"`
PowerProduction float64 `json:"powerProduction"`
PowerReactive float64 `json:"powerReactive"`
PowerProductionReactive float64 `json:"powerProductionReactive"`
MinPowerProduction float64 `json:"minPowerProduction"`
MaxPowerProduction float64 `json:"maxPowerProduction"`
PowerFactor float64 `json:"powerFactor"`
VoltagePhase1 float64 `json:"voltagePhase1"`
VoltagePhase2 float64 `json:"voltagePhase2"`
VoltagePhase3 float64 `json:"voltagePhase3"`
CurrentL1 float64 `json:"currentL1"`
CurrentL2 float64 `json:"currentL2"`
CurrentL3 float64 `json:"currentL3"`
CurrentPhase1 float64 `json:"currentPhase1"`
CurrentPhase2 float64 `json:"currentPhase2"`
CurrentPhase3 float64 `json:"currentPhase3"`
SignalStrength int64 `json:"signalStrength"`
}
// IsExtended returns whether the report is normal or extended.
// In an extended report we would have at least one phase information
func (m *LiveMeasurement) IsExtended() bool {
return m.CurrentPhase1 > 0 || m.CurrentPhase2 > 0 || m.CurrentPhase3 > 0
}
// HasPower returns true if the report contains power measurement
func (m *LiveMeasurement) HasPower() bool {
return m.Power > 0
}
// HasProductionOrConsumptionPower return true if measurement contains values
func (m *LiveMeasurement) HasProductionOrConsumptionPower() bool {
return m.Power > 0 || m.PowerProduction > 0
}
// AsFloatMap returns the LiveMeasurement struct as a float map
func (m *LiveMeasurement) AsFloatMap() map[string]float64 {
return map[string]float64{
"p_import": m.Power,
"p_import_factor": m.PowerFactor,
"e_import": m.LastMeterConsumption,
"e_export": m.LastMeterProduction,
"last_e_import": m.AccumulatedConsumption,
"last_e_export": m.AccumulatedProduction,
"last_hour_e_import": m.AccumulatedConsumptionLastHour,
"last_hour_e_export": m.AccumulatedProductionLastHour,
"p_import_min": m.MinPower,
"p_import_avg": m.AveragePower,
"p_import_max": m.MaxPower,
"p_reactive": m.PowerReactive,
"p_export": m.PowerProduction,
"p_export_min": m.MinPowerProduction,
"p_export_max": m.MaxPowerProduction,
"p_export_reactive": m.PowerProductionReactive,
"u1": m.VoltagePhase1,
"u2": m.VoltagePhase2,
"u3": m.VoltagePhase3,
"i1": m.CurrentL1,
"i2": m.CurrentL2,
"i3": m.CurrentL3,
}
}
// Stream for subscribing to Tibber pulse
type Stream struct {
Token string
ID string
isRunning bool
initialized bool
client *websocket.Conn
stateReportChan chan StreamState
outputChan MsgChan
}
func (ts *Stream) StateReportChan() chan StreamState {
return ts.stateReportChan
}
// NewStream with id and token
func NewStream(id, token string) *Stream {
ts := Stream{
ID: id,
Token: token,
isRunning: true,
initialized: false,
stateReportChan: make(chan StreamState),
}
return &ts
}
// StartSubscription init connection and subscribes to home id
func (ts *Stream) StartSubscription(outputChan MsgChan) error {
// Connect
ts.outputChan = outputChan
for {
err := ts.connect()
if err != nil {
log.WithError(err).Error("<TibberStream> Could not connect to websocket")
time.Sleep(time.Second * 7) // trying to repair the connection
} else {
ts.initialized = false
log.Info("<TibberStream> Connected")
break // connection was made
}
}
ts.startMsgRouter()
return nil
}
func (ts *Stream) reportState(state string, err error) {
st := StreamState{
State: state,
Err: err,
}
select {
case ts.stateReportChan <- st:
default:
log.Debug("<TibberStream> No error liste")
}
}
func (ts *Stream) startMsgRouter() {
go func() {
for {
ts.msgLoop()
log.Error("<TibberStream> Restarting msg router")
}
}()
}
func (ts *Stream) msgLoop() {
defer func() {
if r := recover(); r != nil {
log.Error("<TibberStream> Process CRASHED with error: ", r)
time.Sleep(1 * time.Minute)
}
if ts.client != nil {
ts.client.Close()
}
}()
var unknownErrorCounter int
for {
if !ts.initialized {
ts.sendInitMsg()
}
tm := StreamMsg{}
err := ts.client.ReadJSON(&tm)
if err != nil {
if ts.isWsCloseError(err) {
log.WithError(err).Error("<TibberStream> CloseError, Reconnecting after 10 seconds")
ts.reportState(StreamStateDisconnected, err)
time.Sleep(time.Second * 10) // trying to repair the connection
ts.initialized = false
err = ts.connect()
if err != nil {
log.WithError(err).Error("<TibberStream> Could not connect to websocket")
time.Sleep(time.Second * 30)
}
continue
} else {
unknownErrorCounter++
log.WithError(err).Error("<TibberStream> Unknown error while reading data from WS")
ts.reportState(StreamStateDisconnected, err)
time.Sleep(time.Second * 20)
if unknownErrorCounter > 10 {
ts.client.Close()
err = ts.connect()
if err != nil {
log.WithError(err).Error("<TibberStream> Could not connect to websocket")
time.Sleep(time.Second * 60)
}
}
continue
}
} else {
unknownErrorCounter = 0
switch tm.Type {
case "init_success":
log.Info("<TibberStream> Init success")
ts.initialized = true
ts.sendSubMsg()
case "subscription_success":
log.Info("<TibberStream> Subscription success")
case "subscription_data":
tm.HomeID = ts.ID
ts.outputChan <- &tm
case "subscription_fail":
err := fmt.Errorf("subscription failed")
log.WithError(err).Error("<TibberStream>")
ts.reportState(StreamStateDisconnected, err)
default:
log.Info("<TibberStream> Unexpected message type :", tm.Type)
}
}
if !ts.isRunning {
log.Debug("<TibberStream> Stopping")
break
}
}
}
func (ts *Stream) isWsCloseError(err error) bool {
return websocket.IsCloseError(err,
websocket.CloseGoingAway,
websocket.CloseAbnormalClosure,
websocket.CloseNormalClosure,
websocket.CloseProtocolError,
websocket.CloseUnsupportedData,
websocket.CloseNoStatusReceived,
websocket.CloseInvalidFramePayloadData,
websocket.ClosePolicyViolation,
websocket.CloseMessageTooBig,
websocket.CloseMandatoryExtension,
websocket.CloseInternalServerErr,
websocket.CloseServiceRestart,
websocket.CloseTryAgainLater,
websocket.CloseTLSHandshake)
}
func (ts *Stream) connect() error {
defer func() {
if r := recover(); r != nil {
log.Error("<TibberStream> ID: ", ts.ID, " - Process CRASHED with error : ", r)
time.Sleep(time.Minute * 1)
}
}()
u := url.URL{Scheme: "wss", Host: tibberHost, Path: subscriptionEndpoint}
log.Infof("<TibberStream> Connecting to %s", u.String())
var err error
for {
reqHeader := make(http.Header)
reqHeader.Add("Sec-WebSocket-Protocol", "graphql-subscriptions")
ts.client, _, err = websocket.DefaultDialer.Dial(u.String(), reqHeader)
if err != nil {
log.Error("<TibberStream> Dial error", err)
time.Sleep(time.Second * 2)
} else {
log.Info("<TibberStream> WS Client is connected - ID: ", ts.ID, " error: ", err)
ts.isRunning = true
ts.reportState(StreamStateConnected, err)
return nil
}
}
}
// Stop stops stream
func (ts *Stream) Stop() {
log.Debug("<TibberWsClient> setting isRunning to false")
ts.isRunning = false
}
func (ts *Stream) sendInitMsg() {
init := `{"type":"init","payload":"token=` + ts.Token + `"}`
ts.client.WriteMessage(websocket.TextMessage, []byte(init))
}
func jsonEscape(i string) string {
b, err := json.Marshal(i)
if err != nil {
panic(err)
}
// Trim the beginning and trailing " character
return string(b[1 : len(b)-1])
}
func (ts *Stream) sendSubMsg() {
homeID := ts.ID
var subscriptionQuery = fmt.Sprintf(`
subscription {
liveMeasurement(homeId:"%s") {
timestamp
power
lastMeterConsumption
lastMeterProduction
accumulatedConsumption
accumulatedConsumptionLastHour
accumulatedProductionLastHour
accumulatedCost
accumulatedProduction
accumulatedReward
minPower
averagePower
maxPower
powerProduction
powerReactive
powerProductionReactive
minPowerProduction
maxPowerProduction
powerFactor
voltagePhase1
voltagePhase2
voltagePhase3
currentL1
currentL2
currentL3
currentPhase1
currentPhase2
currentPhase3
}
}`,
homeID)
sub := fmt.Sprintf(`
{
"query": "%s",
"variables":null,
"type":"subscription_start",
"id":0
}`, jsonEscape(subscriptionQuery))
log.Debug("Subscribe with query", sub)
ts.client.WriteMessage(websocket.TextMessage, []byte(sub))
}