2023-02-01 15:22:25 +02:00
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package internal
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import (
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"bytes"
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2023-05-05 09:49:38 +02:00
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"context"
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"crypto/hmac"
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"crypto/sha1"
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"encoding/hex"
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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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"strconv"
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"time"
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"github.com/go-acme/lego/v4/providers/dns/internal/errutils"
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2023-02-01 15:22:25 +02:00
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)
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const defaultBaseURL = "https://rest.websupport.sk"
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// StatusSuccess expected status text when success.
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const StatusSuccess = "success"
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// Client a Websupport DNS API client.
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type Client struct {
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apiKey string
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secretKey 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(apiKey, secretKey string) (*Client, error) {
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if apiKey == "" || secretKey == "" {
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return nil, errors.New("credentials missing")
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}
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2023-05-05 09:49:38 +02:00
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baseURL, _ := url.Parse(defaultBaseURL)
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return &Client{
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apiKey: apiKey,
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secretKey: secretKey,
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baseURL: baseURL,
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HTTPClient: &http.Client{Timeout: 10 * time.Second},
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}, nil
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}
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// GetUser gets a user detail.
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// https://rest.websupport.sk/docs/v1.user#user
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func (c *Client) GetUser(ctx context.Context, userID string) (*User, error) {
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endpoint := c.baseURL.JoinPath("v1", "user", userID)
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req, err := newJSONRequest(ctx, http.MethodGet, endpoint, nil)
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if err != nil {
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return nil, fmt.Errorf("request payload: %w", err)
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}
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result := &User{}
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err = c.do(req, result)
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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// ListRecords lists all records.
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// https://rest.websupport.sk/docs/v1.zone#records
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func (c *Client) ListRecords(ctx context.Context, domainName string) (*ListResponse, error) {
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endpoint := c.baseURL.JoinPath("v1", "user", "self", "zone", domainName, "record")
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req, err := newJSONRequest(ctx, http.MethodGet, endpoint, nil)
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if err != nil {
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return nil, fmt.Errorf("request payload: %w", err)
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}
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result := &ListResponse{}
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err = c.do(req, result)
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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// GetRecords gets a DNS record.
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func (c *Client) GetRecords(ctx context.Context, domainName string, recordID int) (*Record, error) {
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endpoint := c.baseURL.JoinPath("v1", "user", "self", "zone", domainName, "record", strconv.Itoa(recordID))
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req, err := newJSONRequest(ctx, http.MethodGet, endpoint, nil)
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if err != nil {
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return nil, err
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}
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result := &Record{}
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err = c.do(req, result)
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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// AddRecord adds a DNS record.
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// https://rest.websupport.sk/docs/v1.zone#post-record
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func (c *Client) AddRecord(ctx context.Context, domainName string, record Record) (*Response, error) {
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endpoint := c.baseURL.JoinPath("v1", "user", "self", "zone", domainName, "record")
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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, fmt.Errorf("create request: %w", err)
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}
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result := &Response{}
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err = c.do(req, result)
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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// DeleteRecord deletes a DNS record.
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// https://rest.websupport.sk/docs/v1.zone#delete-record
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func (c *Client) DeleteRecord(ctx context.Context, domainName string, recordID int) (*Response, error) {
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endpoint := c.baseURL.JoinPath("v1", "user", "self", "zone", domainName, "record", 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 nil, fmt.Errorf("create request: %w", err)
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}
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result := &Response{}
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err = c.do(req, result)
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if err != nil {
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return nil, err
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}
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return result, 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("Accept-Language", "en_us")
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2024-09-16 19:04:08 +02:00
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err := c.sign(req, time.Now().UTC())
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if err != nil {
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return fmt.Errorf("signature: %w", 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 errutils.NewHTTPDoError(req, 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 parseError(req, resp)
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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 (c *Client) sign(req *http.Request, now time.Time) error {
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if req.URL.Path == "" {
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req.URL.Path += "/"
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}
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canonicalRequest := fmt.Sprintf("%s %s %d", req.Method, req.URL.Path, now.Unix())
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mac := hmac.New(sha1.New, []byte(c.secretKey))
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_, err := mac.Write([]byte(canonicalRequest))
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if err != nil {
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return err
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}
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hashed := mac.Sum(nil)
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signature := hex.EncodeToString(hashed)
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req.SetBasicAuth(c.apiKey, signature)
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req.Header.Set("Date", now.Format(time.RFC3339))
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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 &errAPI
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}
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