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refactor exchange rates data backend, supports multi data source, supports timeout

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MaysWind
2021-01-10 01:07:37 +08:00
parent 170780a631
commit dff54fd174
9 changed files with 211 additions and 85 deletions
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pkg/api/exchange_rates.go
+18 -22
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@@ -1,19 +1,17 @@
package api
import (
"encoding/xml"
"io/ioutil"
"net/http"
"time"
"github.com/mayswind/lab/pkg/core"
"github.com/mayswind/lab/pkg/errs"
"github.com/mayswind/lab/pkg/exchangerates"
"github.com/mayswind/lab/pkg/log"
"github.com/mayswind/lab/pkg/models"
"github.com/mayswind/lab/pkg/settings"
)
// EuroCentralBankExchangeRateUrl represents euro central bank exchange rate date url
const EuroCentralBankExchangeRateUrl = "https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml"
// ExchangeRatesApi represents exchange rate api
type ExchangeRatesApi struct{}
@@ -24,8 +22,19 @@ var (
// LatestExchangeRateHandler returns latest exchange rate data
func (a *ExchangeRatesApi) LatestExchangeRateHandler(c *core.Context) (interface{}, *errs.Error) {
dataSource := exchangerates.Container.Current
if dataSource == nil {
return nil, errs.ErrInvalidExchangeRatesDataSource
}
uid := c.GetCurrentUid()
resp, err := http.Get(EuroCentralBankExchangeRateUrl)
client := &http.Client{
Timeout: time.Duration(settings.Container.Current.ExchangeRatesRequestTimeout) * time.Millisecond,
}
resp, err := client.Get(dataSource.GetRequestUrl())
if err != nil {
log.ErrorfWithRequestId(c, "[exchange_rates.LatestExchangeRateHandler] failed to request latest exchange rate data for user \"uid:%d\", because %s", uid, err.Error())
@@ -39,25 +48,12 @@ func (a *ExchangeRatesApi) LatestExchangeRateHandler(c *core.Context) (interface
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
euroCentralBankData := &models.EuroCentralBankExchangeRateData{}
err = xml.Unmarshal(body, euroCentralBankData)
latestExchangeRateResponse, err := dataSource.Parse(c, body)
if err != nil {
log.ErrorfWithRequestId(c, "[exchange_rates.LatestExchangeRateHandler] failed to parse xml data for user \"uid:%d\", response is %s, because %s", uid, string(body), err.Error())
return nil, errs.ErrFailedToRequestRemoteApi
log.ErrorfWithRequestId(c, "[exchange_rates.LatestExchangeRateHandler] failed to parse response for user \"uid:%d\", because %s", uid, err.Error())
return nil, errs.Or(err, errs.ErrFailedToRequestRemoteApi)
}
latestExchangeRateResponse := euroCentralBankData.ToLatestExchangeRateResponse()
if latestExchangeRateResponse == nil {
log.ErrorfWithRequestId(c, "[exchange_rates.LatestExchangeRateHandler] failed to parse latest exchange rate data for user \"uid:%d\", response is %s,", uid, string(body))
return nil, errs.ErrFailedToRequestRemoteApi
}
latestExchangeRateResponse.ExchangeRates = append(latestExchangeRateResponse.ExchangeRates, &models.LatestExchangeRate{
Currency: "EUR",
Rate: "1",
})
return latestExchangeRateResponse, nil
}