141 lines
3.1 KiB
Go
141 lines
3.1 KiB
Go
package internal
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"strconv"
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"time"
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"github.com/go-acme/lego/v4/challenge/dns01"
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"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
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)
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const defaultBaseURL = "https://api.ukfast.io/safedns/v1"
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const authorizationHeader = "Authorization"
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// Client the UKFast SafeDNS client.
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type Client struct {
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authToken string
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baseURL *url.URL
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HTTPClient *http.Client
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}
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// NewClient Creates a new Client.
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func NewClient(authToken string) *Client {
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baseURL, _ := url.Parse(defaultBaseURL)
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return &Client{
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authToken: authToken,
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baseURL: baseURL,
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HTTPClient: &http.Client{Timeout: 5 * time.Second},
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}
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}
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// AddRecord adds a DNS record.
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func (c *Client) AddRecord(ctx context.Context, zone string, record Record) (*AddRecordResponse, error) {
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endpoint := c.baseURL.JoinPath("zones", dns01.UnFqdn(zone), "records")
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req, err := newJSONRequest(ctx, http.MethodPost, endpoint, record)
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if err != nil {
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return nil, err
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}
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respData := &AddRecordResponse{}
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err = c.do(req, respData)
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if err != nil {
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return nil, fmt.Errorf("remove record: %w", err)
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}
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return respData, nil
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}
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// RemoveRecord removes a DNS record.
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func (c *Client) RemoveRecord(ctx context.Context, zone string, recordID int) error {
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endpoint := c.baseURL.JoinPath("zones", dns01.UnFqdn(zone), "records", strconv.Itoa(recordID))
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req, err := newJSONRequest(ctx, http.MethodDelete, endpoint, nil)
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if err != nil {
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return err
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}
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err = c.do(req, nil)
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if err != nil {
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return fmt.Errorf("remove record: %w", err)
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}
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return nil
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}
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func (c *Client) do(req *http.Request, result any) error {
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req.Header.Set(authorizationHeader, c.authToken)
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resp, err := c.HTTPClient.Do(req)
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if err != nil {
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return errutils.NewHTTPDoError(req, err)
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode/100 != 2 {
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return parseError(req, resp)
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}
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if result == nil {
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return nil
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}
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raw, err := io.ReadAll(resp.Body)
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if err != nil {
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return errutils.NewReadResponseError(req, resp.StatusCode, err)
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}
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err = json.Unmarshal(raw, result)
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if err != nil {
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return errutils.NewUnmarshalError(req, resp.StatusCode, raw, err)
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}
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return nil
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}
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func newJSONRequest(ctx context.Context, method string, endpoint *url.URL, payload any) (*http.Request, error) {
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buf := new(bytes.Buffer)
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if payload != nil {
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err := json.NewEncoder(buf).Encode(payload)
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if err != nil {
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return nil, fmt.Errorf("failed to create request JSON body: %w", err)
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}
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}
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req, err := http.NewRequestWithContext(ctx, method, endpoint.String(), buf)
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if err != nil {
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return nil, fmt.Errorf("unable to create request: %w", err)
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}
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req.Header.Set("Accept", "application/json")
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if payload != nil {
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req.Header.Set("Content-Type", "application/json")
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}
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return req, nil
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}
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func parseError(req *http.Request, resp *http.Response) error {
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raw, _ := io.ReadAll(resp.Body)
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var errAPI APIError
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err := json.Unmarshal(raw, &errAPI)
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if err != nil {
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return errutils.NewUnexpectedStatusCodeError(req, resp.StatusCode, raw)
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}
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return fmt.Errorf("[status code: %d] %w", resp.StatusCode, errAPI)
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}
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