134 lines
3 KiB
Go
134 lines
3 KiB
Go
package internal
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import (
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"bytes"
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"encoding/json"
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"errors"
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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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"path"
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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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)
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const defaultBaseURL = "https://api.ukfast.io/safedns/v1"
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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(zone string, record Record) (*AddRecordResponse, error) {
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body, err := json.Marshal(record)
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if err != nil {
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return nil, err
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}
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endpoint, err := c.baseURL.Parse(path.Join(c.baseURL.Path, "zones", dns01.UnFqdn(zone), "records"))
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if err != nil {
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return nil, err
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}
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req, err := c.newRequest(http.MethodPost, endpoint.String(), bytes.NewReader(body))
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if err != nil {
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return nil, err
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}
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resp, err := c.HTTPClient.Do(req)
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if err != nil {
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return nil, err
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode >= http.StatusBadRequest {
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return nil, readError(req, resp)
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}
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content, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, errors.New(toUnreadableBodyMessage(req, content))
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}
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respData := &AddRecordResponse{}
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err = json.Unmarshal(content, respData)
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if err != nil {
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return nil, fmt.Errorf("%w: %s", err, toUnreadableBodyMessage(req, content))
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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(zone string, recordID int) error {
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endpoint, err := c.baseURL.Parse(path.Join(c.baseURL.Path, "zones", dns01.UnFqdn(zone), "records", strconv.Itoa(recordID)))
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if err != nil {
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return err
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}
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req, err := c.newRequest(http.MethodDelete, endpoint.String(), nil)
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if err != nil {
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return err
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}
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resp, err := c.HTTPClient.Do(req)
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if err != nil {
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return err
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode >= 400 {
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return readError(req, resp)
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}
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return nil
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}
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func (c *Client) newRequest(method, endpoint string, body io.Reader) (*http.Request, error) {
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req, err := http.NewRequest(method, endpoint, body)
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if err != nil {
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return nil, err
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}
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req.Header.Set("Content-Type", "application/json")
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req.Header.Set("Accept", "application/json")
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req.Header.Set("Authorization", c.authToken)
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return req, nil
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}
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func readError(req *http.Request, resp *http.Response) error {
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content, err := io.ReadAll(resp.Body)
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if err != nil {
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return errors.New(toUnreadableBodyMessage(req, content))
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}
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var errInfo APIError
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err = json.Unmarshal(content, &errInfo)
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if err != nil {
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return fmt.Errorf("unmarshaling error: %w: %s", err, toUnreadableBodyMessage(req, content))
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}
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return errInfo
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}
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func toUnreadableBodyMessage(req *http.Request, rawBody []byte) string {
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return fmt.Sprintf("the request %s received a response with an invalid format: %q", req.URL, string(rawBody))
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}
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