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api.go
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/
api.go
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package updater
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/http"
)
var (
ErrHTTPStatusCodeNotOK = errors.New("HTTP status code not OK")
)
func fetchAPI(ctx context.Context, client *http.Client,
limit uint) (data serversData, err error) {
url := "https://api.nordvpn.com/v2/servers"
url += fmt.Sprintf("?limit=%d", limit) // 0 means no limit
request, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
if err != nil {
return serversData{}, err
}
response, err := client.Do(request)
if err != nil {
return serversData{}, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return serversData{}, fmt.Errorf("%w: %s", ErrHTTPStatusCodeNotOK, response.Status)
}
decoder := json.NewDecoder(response.Body)
if err := decoder.Decode(&data); err != nil {
return serversData{}, fmt.Errorf("decoding response body: %w", err)
}
if err := response.Body.Close(); err != nil {
return serversData{}, err
}
return data, nil
}