132 lines
3.4 KiB
Go
132 lines
3.4 KiB
Go
package digitalocean
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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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"io/ioutil"
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"net/http"
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"github.com/go-acme/lego/challenge/dns01"
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)
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const defaultBaseURL = "https://api.digitalocean.com"
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// txtRecordResponse represents a response from DO's API after making a TXT record
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type txtRecordResponse struct {
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DomainRecord record `json:"domain_record"`
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}
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type record struct {
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ID int `json:"id,omitempty"`
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Type string `json:"type,omitempty"`
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Name string `json:"name,omitempty"`
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Data string `json:"data,omitempty"`
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TTL int `json:"ttl,omitempty"`
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}
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type apiError struct {
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ID string `json:"id"`
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Message string `json:"message"`
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}
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func (d *DNSProvider) removeTxtRecord(domain string, recordID int) error {
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authZone, err := dns01.FindZoneByFqdn(dns01.ToFqdn(domain))
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if err != nil {
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return fmt.Errorf("could not determine zone for domain: '%s'. %s", domain, err)
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}
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reqURL := fmt.Sprintf("%s/v2/domains/%s/records/%d", d.config.BaseURL, dns01.UnFqdn(authZone), recordID)
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req, err := d.newRequest(http.MethodDelete, reqURL, nil)
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if err != nil {
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return err
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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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defer 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 (d *DNSProvider) addTxtRecord(fqdn, value string) (*txtRecordResponse, error) {
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authZone, err := dns01.FindZoneByFqdn(dns01.ToFqdn(fqdn))
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if err != nil {
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return nil, fmt.Errorf("could not determine zone for domain: '%s'. %s", fqdn, err)
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}
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reqData := record{Type: "TXT", Name: fqdn, Data: value, TTL: d.config.TTL}
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body, err := json.Marshal(reqData)
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if err != nil {
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return nil, err
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}
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reqURL := fmt.Sprintf("%s/v2/domains/%s/records", d.config.BaseURL, dns01.UnFqdn(authZone))
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req, err := d.newRequest(http.MethodPost, reqURL, 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 := d.config.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 resp.Body.Close()
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if resp.StatusCode >= 400 {
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return nil, readError(req, resp)
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}
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content, err := ioutil.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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// Everything looks good; but we'll need the ID later to delete the record
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respData := &txtRecordResponse{}
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err = json.Unmarshal(content, respData)
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if err != nil {
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return nil, fmt.Errorf("%v: %s", err, toUnreadableBodyMessage(req, content))
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}
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return respData, nil
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}
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func (d *DNSProvider) newRequest(method, reqURL string, body io.Reader) (*http.Request, error) {
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req, err := http.NewRequest(method, reqURL, 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("Authorization", fmt.Sprintf("Bearer %s", d.config.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 := ioutil.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("apiError unmarshaling error: %v: %s", err, toUnreadableBodyMessage(req, content))
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}
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return fmt.Errorf("HTTP %d: %s: %s", resp.StatusCode, errInfo.ID, errInfo.Message)
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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 sent a response with a body which is an invalid format: %q", req.URL, string(rawBody))
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}
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