200 lines
4.5 KiB
Go
200 lines
4.5 KiB
Go
package gandiv5
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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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"github.com/go-acme/lego/v4/log"
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)
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const apiKeyHeader = "X-Api-Key"
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// types for JSON responses with only a message.
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type apiResponse struct {
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Message string `json:"message"`
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UUID string `json:"uuid,omitempty"`
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}
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// Record TXT record representation.
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type Record struct {
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RRSetTTL int `json:"rrset_ttl"`
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RRSetValues []string `json:"rrset_values"`
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RRSetName string `json:"rrset_name,omitempty"`
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RRSetType string `json:"rrset_type,omitempty"`
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}
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func (d *DNSProvider) addTXTRecord(domain, name, value string, ttl int) error {
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// Get exiting values for the TXT records
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// Needed to create challenges for both wildcard and base name domains
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txtRecord, err := d.getTXTRecord(domain, name)
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if err != nil {
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return err
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}
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values := []string{value}
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if len(txtRecord.RRSetValues) > 0 {
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values = append(values, txtRecord.RRSetValues...)
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}
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target := fmt.Sprintf("domains/%s/records/%s/TXT", domain, name)
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newRecord := &Record{RRSetTTL: ttl, RRSetValues: values}
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req, err := d.newRequest(http.MethodPut, target, newRecord)
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if err != nil {
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return err
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}
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message := apiResponse{}
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err = d.do(req, &message)
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if err != nil {
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return fmt.Errorf("unable to create TXT record for domain %s and name %s: %w", domain, name, err)
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}
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if len(message.Message) > 0 {
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log.Infof("API response: %s", message.Message)
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}
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return nil
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}
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func (d *DNSProvider) getTXTRecord(domain, name string) (*Record, error) {
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target := fmt.Sprintf("domains/%s/records/%s/TXT", domain, name)
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// Get exiting values for the TXT records
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// Needed to create challenges for both wildcard and base name domains
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req, err := d.newRequest(http.MethodGet, target, nil)
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if err != nil {
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return nil, err
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}
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txtRecord := &Record{}
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err = d.do(req, txtRecord)
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if err != nil {
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return nil, fmt.Errorf("unable to get TXT records for domain %s and name %s: %w", domain, name, err)
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}
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return txtRecord, nil
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}
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func (d *DNSProvider) deleteTXTRecord(domain, name string) error {
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target := fmt.Sprintf("domains/%s/records/%s/TXT", domain, name)
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req, err := d.newRequest(http.MethodDelete, target, nil)
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if err != nil {
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return err
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}
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message := apiResponse{}
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err = d.do(req, &message)
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if err != nil {
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return fmt.Errorf("unable to delete TXT record for domain %s and name %s: %w", domain, name, err)
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}
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if len(message.Message) > 0 {
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log.Infof("API response: %s", message.Message)
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}
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return nil
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}
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func (d *DNSProvider) newRequest(method, resource string, body interface{}) (*http.Request, error) {
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u := fmt.Sprintf("%s/%s", d.config.BaseURL, resource)
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if body == nil {
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req, err := http.NewRequest(method, u, nil)
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if err != nil {
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return nil, err
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}
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return req, nil
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}
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reqBody, err := json.Marshal(body)
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if err != nil {
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return nil, err
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}
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req, err := http.NewRequest(method, u, bytes.NewBuffer(reqBody))
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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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return req, nil
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}
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func (d *DNSProvider) do(req *http.Request, v interface{}) error {
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if len(d.config.APIKey) > 0 {
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req.Header.Set(apiKeyHeader, d.config.APIKey)
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}
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resp, err := d.config.HTTPClient.Do(req)
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if err != nil {
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return err
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}
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err = checkResponse(resp)
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if err != nil {
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return err
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}
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if v == nil {
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return nil
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}
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raw, err := readBody(resp)
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if err != nil {
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return fmt.Errorf("failed to read body: %w", err)
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}
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if len(raw) > 0 {
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err = json.Unmarshal(raw, v)
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if err != nil {
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return fmt.Errorf("unmarshaling error: %w: %s", err, string(raw))
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}
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}
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return nil
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}
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func checkResponse(resp *http.Response) error {
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if resp.StatusCode == http.StatusNotFound && resp.Request.Method == http.MethodGet {
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return nil
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}
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if resp.StatusCode >= http.StatusBadRequest {
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data, err := readBody(resp)
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if err != nil {
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return fmt.Errorf("%d [%s] request failed: %w", resp.StatusCode, http.StatusText(resp.StatusCode), err)
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}
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message := &apiResponse{}
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err = json.Unmarshal(data, message)
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if err != nil {
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return fmt.Errorf("%d [%s] request failed: %w: %s", resp.StatusCode, http.StatusText(resp.StatusCode), err, data)
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}
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return fmt.Errorf("%d [%s] request failed: %s", resp.StatusCode, http.StatusText(resp.StatusCode), message.Message)
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}
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return nil
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}
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func readBody(resp *http.Response) ([]byte, error) {
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if resp.Body == nil {
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return nil, errors.New("response body is nil")
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}
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defer resp.Body.Close()
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rawBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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return rawBody, nil
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}
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