use reader label charset reader for xml deserializing

pkg/exchangerates/danmarks_national_bank_datasource.go

@@ -1,10 +1,13 @@
 package exchangerates
 
 import (
+	"bytes"
 	"encoding/xml"
 	"math"
 	"time"
 
+	"golang.org/x/net/html/charset"
+
 	"github.com/mayswind/ezbookkeeping/pkg/core"
 	"github.com/mayswind/ezbookkeeping/pkg/errs"
 	"github.com/mayswind/ezbookkeeping/pkg/log"
@@ -135,8 +138,11 @@ func (e *DanmarksNationalbankDataSource) GetRequestUrls() []string {
 
 // Parse returns the common response entity according to the Danmarks Nationalbank data source raw response
 func (e *DanmarksNationalbankDataSource) Parse(c core.Context, content []byte) (*models.LatestExchangeRateResponse, error) {
+	xmlDecoder := xml.NewDecoder(bytes.NewReader(content))
+	xmlDecoder.CharsetReader = charset.NewReaderLabel
+
 	danmarksNationalbankData := &DanmarksNationalbankExchangeRateData{}
-	err := xml.Unmarshal(content, danmarksNationalbankData)
+	err := xmlDecoder.Decode(danmarksNationalbankData)
 
 	if err != nil {
 		log.Errorf(c, "[danmarks_national_bank_datasource.Parse] failed to parse xml data, content is %s, because %s", string(content), err.Error())