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client.go
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client.go
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package internal
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"time"
"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
)
const apiEndpoint = "https://njal.la/api/1/"
const authorizationHeader = "Authorization"
// Client is a Njalla API client.
type Client struct {
token string
apiEndpoint string
HTTPClient *http.Client
}
// NewClient creates a new Client.
func NewClient(token string) *Client {
return &Client{
token: token,
apiEndpoint: apiEndpoint,
HTTPClient: &http.Client{Timeout: 5 * time.Second},
}
}
// AddRecord adds a record.
func (c *Client) AddRecord(ctx context.Context, record Record) (*Record, error) {
data := APIRequest{
Method: "add-record",
Params: record,
}
req, err := newJSONRequest(ctx, http.MethodPost, c.apiEndpoint, data)
if err != nil {
return nil, err
}
var result APIResponse[*Record]
err = c.do(req, &result)
if err != nil {
return nil, err
}
return result.Result, nil
}
// RemoveRecord removes a record.
func (c *Client) RemoveRecord(ctx context.Context, id string, domain string) error {
data := APIRequest{
Method: "remove-record",
Params: Record{
ID: id,
Domain: domain,
},
}
req, err := newJSONRequest(ctx, http.MethodPost, c.apiEndpoint, data)
if err != nil {
return err
}
err = c.do(req, &APIResponse[json.RawMessage]{})
if err != nil {
return err
}
return nil
}
// ListRecords list the records for one domain.
func (c *Client) ListRecords(ctx context.Context, domain string) ([]Record, error) {
data := APIRequest{
Method: "list-records",
Params: Record{
Domain: domain,
},
}
req, err := newJSONRequest(ctx, http.MethodPost, c.apiEndpoint, data)
if err != nil {
return nil, err
}
var result APIResponse[Records]
err = c.do(req, &result)
if err != nil {
return nil, err
}
return result.Result.Records, nil
}
func (c *Client) do(req *http.Request, result Response) error {
req.Header.Set(authorizationHeader, "Njalla "+c.token)
resp, err := c.HTTPClient.Do(req)
if err != nil {
return errutils.NewHTTPDoError(req, err)
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != http.StatusOK {
return errutils.NewUnexpectedResponseStatusCodeError(req, resp)
}
raw, err := io.ReadAll(resp.Body)
if err != nil {
return errutils.NewReadResponseError(req, resp.StatusCode, err)
}
err = json.Unmarshal(raw, result)
if err != nil {
return errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
}
return result.GetError()
}
func newJSONRequest(ctx context.Context, method string, endpoint string, payload any) (*http.Request, error) {
buf := new(bytes.Buffer)
if payload != nil {
err := json.NewEncoder(buf).Encode(payload)
if err != nil {
return nil, fmt.Errorf("failed to create request JSON body: %w", err)
}
}
req, err := http.NewRequestWithContext(ctx, method, endpoint, buf)
if err != nil {
return nil, fmt.Errorf("unable to create request: %w", err)
}
req.Header.Set("Accept", "application/json")
if payload != nil {
req.Header.Set("Content-Type", "application/json")
}
return req, nil
}