/
pun.go
260 lines (218 loc) · 5.52 KB
/
pun.go
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package tariff
import (
"encoding/xml"
"fmt"
"io"
"net/http"
"net/http/cookiejar"
"net/url"
"slices"
"strconv"
"strings"
"sync"
"time"
"github.com/cenkalti/backoff/v4"
"github.com/evcc-io/evcc/api"
"github.com/evcc-io/evcc/util"
"golang.org/x/net/html"
)
type Pun struct {
*embed
log *util.Logger
charges float32
tax float32
data *util.Monitor[api.Rates]
}
type NewDataSet struct {
XMLName xml.Name `xml:"NewDataSet"`
Prezzi []Prezzo `xml:"Prezzi"`
}
type Prezzo struct {
Data string `xml:"Data"`
Ora string `xml:"Ora"`
PUN string `xml:"PUN"`
}
type Rate struct {
Start time.Time `json:"start"`
End time.Time `json:"end"`
Price float64 `json:"price"`
}
var _ api.Tariff = (*Pun)(nil)
func init() {
registry.Add("pun", NewPunFromConfig)
}
func NewPunFromConfig(other map[string]interface{}) (api.Tariff, error) {
cc := struct {
Charges float32
Tax float32
}{
Charges: 0.0,
Tax: 0.0,
}
if err := util.DecodeOther(other, &cc); err != nil {
return nil, err
}
t := &Pun{
log: util.NewLogger("pun"),
charges: cc.Charges,
tax: cc.Tax,
data: util.NewMonitor[api.Rates](2 * time.Hour),
}
done := make(chan error)
go t.run(done)
err := <-done
return t, err
}
func (t *Pun) run(done chan error) {
var once sync.Once
bo := newBackoff()
tick := time.NewTicker(time.Hour)
for ; true; <-tick.C {
var today api.Rates
if err := backoff.Retry(func() error {
var err error
today, err = t.getData(time.Now())
return err
}, bo); err != nil {
once.Do(func() { done <- err })
t.log.ERROR.Println(err)
continue
}
res, err := backoff.RetryWithData(func() (api.Rates, error) {
res, err := t.getData(time.Now().AddDate(0, 0, 1))
return res, backoffPermanentError(err)
}, bo)
if err != nil {
once.Do(func() { done <- err })
t.log.ERROR.Println(err)
continue
}
// merge today and tomorrow data
data := append(today, res...)
t.data.Set(data)
once.Do(func() { close(done) })
}
}
// Rates implements the api.Tariff interface
func (t *Pun) Rates() (api.Rates, error) {
var res api.Rates
err := t.data.GetFunc(func(val api.Rates) {
res = slices.Clone(val)
})
return res, err
}
// Type implements the api.Tariff interface
func (t *Pun) Type() api.TariffType {
return api.TariffTypePriceForecast
}
func (t *Pun) getData(day time.Time) (api.Rates, error) {
// Initial URL
urlString := "https://www.mercatoelettrico.org/It/WebServerDataStore/MGP_Prezzi/" + day.Format("20060102") + "MGPPrezzi.xml"
// Cookie Jar zur Speicherung von Cookies zwischen den Requests
jar, _ := cookiejar.New(nil)
client := &http.Client{
Jar: jar,
}
// Erster Request
resp, err := client.Get(urlString)
if err != nil {
fmt.Println("Error fetching URL:", err)
return nil, err
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
formData, err := parseFormFields(body)
if err != nil {
fmt.Println("Error parsing form fields:", err)
return nil, err
}
redirectURL := resp.Request.URL.String()
// Hinzufügen der spezifizierten Parameter
formData.Set("ctl00$ContentPlaceHolder1$CBAccetto1", "on")
formData.Set("ctl00$ContentPlaceHolder1$CBAccetto2", "on")
formData.Set("ctl00$ContentPlaceHolder1$Button1", "Accetto")
// Formular senden
resp, err = client.PostForm(redirectURL, formData)
if err != nil {
fmt.Println("Error submitting form:", err)
return nil, err
}
defer resp.Body.Close()
// Erneuter Request auf die ursprüngliche URL
resp, err = client.Get(urlString)
if err != nil {
fmt.Println("Error fetching URL after form submission:", err)
return nil, err
}
defer resp.Body.Close()
// Verarbeitung der erhaltenen Daten
body, _ = io.ReadAll(resp.Body)
xmlData := []byte(string(body)) // Ersetzen Sie [Ihr XML-Datenstring hier] mit Ihrem XML-String
var dataSet NewDataSet
err = xml.Unmarshal(xmlData, &dataSet)
if err != nil {
fmt.Println("Error unmarshalling XML: ", err)
}
data := make(api.Rates, 0, len(dataSet.Prezzi))
for _, p := range dataSet.Prezzi {
date, err := time.Parse("20060102", p.Data)
if err != nil {
fmt.Println("Error parsing date: ", err)
}
hour, err := strconv.Atoi(p.Ora)
if err != nil {
fmt.Println("Error parsing hour: ", err)
}
location, err := time.LoadLocation("Europe/Rome")
if err != nil {
fmt.Println("Error loading location: ", err)
}
start := time.Date(date.Year(), date.Month(), date.Day(), hour-1, 0, 0, 0, location)
end := start.Add(time.Hour)
priceStr := strings.Replace(p.PUN, ",", ".", -1) // Ersetzen Sie Komma durch Punkt
price, err := strconv.ParseFloat(priceStr, 64)
if err != nil {
fmt.Println("Error parsing price: ", err)
}
ar := api.Rate{
Start: start,
End: end,
Price: (price/1000.0 + float64(t.charges)) * (1 + float64(t.tax)),
}
data = append(data, ar)
}
data.Sort()
return data, nil
}
func parseFormFields(body []byte) (url.Values, error) {
formData := url.Values{}
doc, err := html.Parse(strings.NewReader(string(body)))
if err != nil {
return formData, err
}
var f func(*html.Node)
f = func(n *html.Node) {
if n.Type == html.ElementNode && n.Data == "input" {
inputType := ""
inputName := ""
inputValue := ""
for _, a := range n.Attr {
if a.Key == "type" {
inputType = a.Val
} else if a.Key == "name" {
inputName = a.Val
} else if a.Key == "value" {
inputValue = a.Val
}
}
if inputType == "hidden" && inputName != "" {
formData.Set(inputName, inputValue)
}
}
for c := n.FirstChild; c != nil; c = c.NextSibling {
f(c)
}
}
f(doc)
return formData, nil
}