mirror of
https://github.com/go-acme/lego.git
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190 lines
4.8 KiB
Go
190 lines
4.8 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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"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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"time"
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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.gcore.com/dns"
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const (
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authorizationHeader = "Authorization"
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tokenTypeHeader = "APIKey"
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)
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const txtRecordType = "TXT"
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// Client for DNS API.
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type Client struct {
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token string
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baseURL *url.URL
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HTTPClient *http.Client
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}
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// NewClient constructor of Client.
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func NewClient(token string) *Client {
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baseURL, _ := url.Parse(defaultBaseURL)
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return &Client{
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token: token,
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baseURL: baseURL,
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HTTPClient: &http.Client{Timeout: 10 * time.Second},
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}
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}
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// GetZone gets zone information.
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// https://api.gcore.com/docs/dns#tag/zones/operation/Zone
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func (c *Client) GetZone(ctx context.Context, name string) (Zone, error) {
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endpoint := c.baseURL.JoinPath("v2", "zones", name)
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zone := Zone{}
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err := c.doRequest(ctx, http.MethodGet, endpoint, nil, &zone)
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if err != nil {
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return Zone{}, fmt.Errorf("get zone %s: %w", name, err)
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}
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return zone, nil
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}
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// GetRRSet gets RRSet item.
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// https://api.gcore.com/docs/dns#tag/rrsets/operation/RRSet
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func (c *Client) GetRRSet(ctx context.Context, zone, name string) (RRSet, error) {
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endpoint := c.baseURL.JoinPath("v2", "zones", zone, name, txtRecordType)
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var result RRSet
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err := c.doRequest(ctx, http.MethodGet, endpoint, nil, &result)
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if err != nil {
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return RRSet{}, fmt.Errorf("get txt records %s -> %s: %w", zone, name, err)
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}
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return result, nil
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}
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// DeleteRRSet removes RRSet record.
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// https://api.gcore.com/docs/dns#tag/rrsets/operation/DeleteRRSet
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func (c *Client) DeleteRRSet(ctx context.Context, zone, name string) error {
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endpoint := c.baseURL.JoinPath("v2", "zones", zone, name, txtRecordType)
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err := c.doRequest(ctx, http.MethodDelete, endpoint, nil, nil)
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if err != nil {
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// Support DELETE idempotence https://developer.mozilla.org/en-US/docs/Glossary/Idempotent
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statusErr := new(APIError)
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if errors.As(err, statusErr) && statusErr.StatusCode == http.StatusNotFound {
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return nil
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}
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return fmt.Errorf("delete record request: %w", err)
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}
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return nil
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}
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// AddRRSet adds TXT record (create or update).
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func (c *Client) AddRRSet(ctx context.Context, zone, recordName, value string, ttl int) error {
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record := RRSet{TTL: ttl, Records: []Records{{Content: []string{value}}}}
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txt, err := c.GetRRSet(ctx, zone, recordName)
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if err == nil && len(txt.Records) > 0 {
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record.Records = append(record.Records, txt.Records...)
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return c.updateRRSet(ctx, zone, recordName, record)
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}
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return c.createRRSet(ctx, zone, recordName, record)
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}
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// https://api.gcore.com/docs/dns#tag/rrsets/operation/CreateRRSet
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func (c *Client) createRRSet(ctx context.Context, zone, name string, record RRSet) error {
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endpoint := c.baseURL.JoinPath("v2", "zones", zone, name, txtRecordType)
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return c.doRequest(ctx, http.MethodPost, endpoint, record, nil)
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}
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// https://api.gcore.com/docs/dns#tag/rrsets/operation/UpdateRRSet
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func (c *Client) updateRRSet(ctx context.Context, zone, name string, record RRSet) error {
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endpoint := c.baseURL.JoinPath("v2", "zones", zone, name, txtRecordType)
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return c.doRequest(ctx, http.MethodPut, endpoint, record, nil)
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}
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func (c *Client) doRequest(ctx context.Context, method string, endpoint *url.URL, bodyParams any, result any) error {
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req, err := newJSONRequest(ctx, method, endpoint, bodyParams)
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if err != nil {
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return fmt.Errorf("new request: %w", err)
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}
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req.Header.Set(authorizationHeader, fmt.Sprintf("%s %s", tokenTypeHeader, c.token))
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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(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(resp *http.Response) error {
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raw, _ := io.ReadAll(resp.Body)
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errAPI := APIError{StatusCode: resp.StatusCode}
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err := json.Unmarshal(raw, &errAPI)
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if err != nil {
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errAPI.Message = string(raw)
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}
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return errAPI
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}
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