BREAKING: Migrate REMOTE_URL to OPENDTU_ADDRESS.
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BREAKING: Migrate opendtu to opendtu_address
Add authentication capability for locked-down opendtu's.
Updated setup examples with new variables.
This commit is contained in:
Pieter Hollander 2024-07-26 23:46:19 +02:00
parent bf885fb84c
commit 48d0382b0e
Signed by: pieter
SSH key fingerprint: SHA256:HbX+9cBXsop9SuvL+mELd29sK+7DehFfdVweFVDtMSg
6 changed files with 109 additions and 21 deletions

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@ -26,7 +26,10 @@ services:
restart: always
environment:
DB_URL: ${DB_URL}
REMOTE_URL: ${REMOTE_URL}
OPENDTU_ADDRESS: ${OPENDTU_ADDRESS}
OPENDTU_AUTH: ${OPENDTU_AUTH}
OPENDTU_USERNAME: ${OPENDTU_USERNAME}
OPENDTU_PASSWORD: ${OPENDTU_PASSWORD}
TIMESCALEDB_ENABLED: ${TIMESCALEDB_ENABLED}
TZ: ${TZ}
depends_on:

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@ -26,7 +26,10 @@ services:
image: git.hollander.online/energy/opendtu-logger:latest
environment:
DB_URL: ${DB_URL}
REMOTE_URL: ${REMOTE_URL}
OPENDTU_ADDRESS: ${OPENDTU_ADDRESS}
OPENDTU_AUTH: ${OPENDTU_AUTH}
OPENDTU_USERNAME: ${OPENDTU_USERNAME}
OPENDTU_PASSWORD: ${OPENDTU_PASSWORD}
TIMESCALEDB_ENABLED: ${TIMESCALEDB_ENABLED}
TZ: ${TZ}
depends_on:

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@ -5,7 +5,10 @@ services:
image: git.hollander.online/energy/opendtu-logger:latest
environment:
DB_URL: ${DB_URL}
REMOTE_URL: ${REMOTE_URL}
OPENDTU_ADDRESS: ${OPENDTU_ADDRESS}
OPENDTU_AUTH: ${OPENDTU_AUTH}
OPENDTU_USERNAME: ${OPENDTU_USERNAME}
OPENDTU_PASSWORD: ${OPENDTU_PASSWORD}
TIMESCALEDB_ENABLED: ${TIMESCALEDB_ENABLED}
TZ: ${TZ}
depends_on:

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@ -1,9 +1,13 @@
# OpenDTU
OPENDTU_ADDRESS="192.168.1.89:80"
OPENDTU_AUTH=false
OPENDTU_USERNAME=
OPENDTU_PASSWORD=
# OpenDTU Logger
REMOTE_URL="192.168.1.89:80"
DB_URL="host=timescaledb port=5432 user=postgres password=secret dbname=opendtu_logger sslmode=disable"
TIMESCALEDB_ENABLED=true
TZ="Europe/Amsterdam"
# Database configuration
PG_USER=postgres
PG_PASSWORD=
PG_DB=opendtu_logger
PG_DB=opendtu_logger

102
main.go
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@ -1,5 +1,4 @@
// TODO: Storage optimisation: Map inverter serial to shorter serial. Use that for referring.
// TODO: Use username and password provided using Basic Authentication.
// TODO: Record Inverter struct data only on-change.
// Idea: Make a full admin / config GUI and only configure through this utility.
// Idea: Gather settings only on start-up.
@ -9,6 +8,7 @@ package main
import (
"database/sql"
"encoding/base64"
"encoding/json"
"fmt"
"io/fs"
@ -149,10 +149,13 @@ type InverterSettingsData struct {
// Config settings struct
type Config struct {
DB string `json:"db"`
OpenDTU string `json:"opendtu"`
TimescaleDB bool `json:"timescaledb"`
TZ string `json:"tz"`
DB string `json:"db"`
OpenDTUAddress string `json:"opendtu_address"`
OpenDTUAuth bool `json:"opendtu_auth"`
OpenDTUUser string `json:"opendtu_username"`
OpenDTUPassword string `json:"opendtu_password"`
TimescaleDB bool `json:"timescaledb"`
TZ string `json:"tz"`
}
var logger = slog.New(slog.NewJSONHandler(os.Stdout, nil))
@ -173,15 +176,50 @@ func loadConfig() Config {
if err != nil {
log.Fatalf("Error parsing config file: %v", err)
}
if config.DB == "" {
log.Fatal("db connection settings are not set")
}
if config.OpenDTUAddress == "" {
log.Fatal("opendtu_address is not set")
}
if config.OpenDTUAuth {
if config.OpenDTUUser == "" {
log.Fatal("opendtu_username is not set, while opendtu_auth is set to enabled. Set opendtu_auth to false or set username")
}
if config.OpenDTUPassword == "" {
log.Fatal("opendtu_password is not set, while opendtu_auth is set to enabled. Set opendtu_auth to false or set password")
}
}
} else {
logger.Info("JSON config file not found. Falling back to environment variables.")
// Fallback to environment variables
config.DB = os.Getenv("DB_URL")
if config.DB == "" {
log.Fatal("DB_URL environment variable is not set.")
}
config.OpenDTU = os.Getenv("REMOTE_URL")
if config.OpenDTU == "" {
log.Fatal("REMOTE_URL environment variable is not set.")
config.OpenDTUAddress = os.Getenv("OPENDTU_ADDRESS")
if config.OpenDTUAddress == "" {
log.Fatal("OPENDTU_ADDRESS environment variable is not set.")
}
openDTUAuthStr := os.Getenv("OPENDTU_AUTH")
if openDTUAuthStr != "" {
openDTUAuth, err := strconv.ParseBool(openDTUAuthStr)
if err != nil {
log.Fatalf("Error parsing OPENDTU_AUTH: %v", err)
}
config.OpenDTUAuth = openDTUAuth
}
if config.OpenDTUAuth {
config.OpenDTUUser = os.Getenv("OPENDTU_USERNAME")
if config.OpenDTUUser == "" {
log.Fatal("OPENDTU_USERNAME environment variable is not set.")
}
config.OpenDTUPassword = os.Getenv("OPENDTU_PASSWORD")
if config.OpenDTUPassword == "" {
log.Fatal("OPENDTU_PASSWORD environment variable is not set.")
}
}
timescaleDBStr := os.Getenv("TIMESCALEDB_ENABLED")
@ -194,6 +232,10 @@ func loadConfig() Config {
}
config.TZ = os.Getenv("TZ")
}
_, err = time.LoadLocation(config.TZ)
if err != nil {
logger.Warn("invalid timezone")
}
return config
}
@ -218,10 +260,16 @@ func main() {
migrateDB(db)
// Create WebSocket URL from config variable
wsURL := "ws://" + config.OpenDTU + "/livedata"
wsURL := "ws://" + config.OpenDTUAddress + "/livedata"
// Create headers with optional Basic Auth
headers := http.Header{}
if config.OpenDTUAuth {
headers.Set("Authorization", basicAuth(config.OpenDTUUser, config.OpenDTUPassword))
}
// Establish WebSocket connection
c, _, err := websocket.DefaultDialer.Dial(wsURL, nil)
c, _, err := websocket.DefaultDialer.Dial(wsURL, headers)
if err != nil {
log.Fatal(err)
}
@ -424,15 +472,33 @@ func migrateFS(db *sql.DB, migrationFS fs.FS, dir string) error {
}
func queryEventsEndpoint(inverterSerial string) (*EventsResponse, error) {
remoteURL := config.OpenDTU
endpoint := fmt.Sprintf("http://"+remoteURL+"/api/eventlog/status?inv=%s", inverterSerial)
endpoint := fmt.Sprintf("http://"+config.OpenDTUAddress+"/api/eventlog/status?inv=%s", inverterSerial)
resp, err := http.Get(endpoint)
// Create a new HTTP request
req, err := http.NewRequest("GET", endpoint, nil)
if err != nil {
return nil, err
}
if config.OpenDTUAuth {
// Add Basic Auth header
req.Header.Add("Authorization", basicAuth(config.OpenDTUUser, config.OpenDTUPassword))
}
// Send the request
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
// Check for HTTP errors
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("HTTP request failed with status: %s", resp.Status)
}
// Decode the response
var eventsResponse EventsResponse
if err := json.NewDecoder(resp.Body).Decode(&eventsResponse); err != nil {
return nil, err
@ -508,6 +574,12 @@ func updateEvents(db *sql.DB, inverterSerial string, events *EventsResponse) {
}
}
// basicAuth generates the Basic Auth header value
func basicAuth(username, password string) string {
credentials := username + ":" + password
return "Basic " + base64.StdEncoding.EncodeToString([]byte(credentials))
}
// TODO: finish this function.
// func updateInverterConfig(db *sql.DB) {
// // Periodically query the /api/inverter/list
@ -526,8 +598,8 @@ func updateEvents(db *sql.DB, inverterSerial string, events *EventsResponse) {
// }
// func queryConfigEndpoint() (*InverterSettingsData, error) {
// remoteURL := os.Getenv("REMOTE_URL")
// endpoint := fmt.Sprintf("http://" + remoteURL + "/api/inverter/list")
// openDTUAddress := os.Getenv("OPENDTU_ADDRESS")
// endpoint := fmt.Sprintf("http://" + openDTUAddress + "/api/inverter/list")
// resp, err := http.Get(endpoint)
// if err != nil {

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@ -16,7 +16,10 @@ Type=simple
User=opendtu-logger
Group=opendtu-logger
Environment="REMOTE_URL=opendtu.local:80"
Environment="OPENDTU_ADDRESS=opendtu.local:80"
Environment="OPENDTU_AUTH=false"
Environment="OPENDTU_USERNAME=admin"
Environment="OPENDTU_PASSWORD=your_super_secret_password"
Environment="DB_URL=host=localhost port=5432 user=postgres password=secret dbname=dtu sslmode=disable"
Environment="TIMESCALEDB_ENABLED=true"
Environment="TZ=Europe/Amsterdam"