140 lines
3.9 KiB
Go
140 lines
3.9 KiB
Go
// Package digitalocean implements a DNS provider for solving the DNS-01 challenge using digitalocean DNS.
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package digitalocean
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"net/http"
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"sync"
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"time"
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"github.com/xenolf/lego/acme"
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)
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// DNSProvider is an implementation of the acme.ChallengeProvider interface
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// that uses DigitalOcean's REST API to manage TXT records for a domain.
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type DNSProvider struct {
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apiAuthToken string
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recordIDs map[string]int
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recordIDsMu sync.Mutex
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}
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// NewDNSProvider returns a new DNSProvider instance.
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// apiAuthToken is the personal access token created in the DigitalOcean account
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// control panel, and it will be sent in bearer authorization headers.
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func NewDNSProvider(apiAuthToken string) (*DNSProvider, error) {
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return &DNSProvider{
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apiAuthToken: apiAuthToken,
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recordIDs: make(map[string]int),
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}, nil
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}
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// Present creates a TXT record using the specified parameters
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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// txtRecordRequest represents the request body to DO's API to make a TXT record
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type txtRecordRequest struct {
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RecordType string `json:"type"`
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Name string `json:"name"`
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Data string `json:"data"`
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}
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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 struct {
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ID int `json:"id"`
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Type string `json:"type"`
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Name string `json:"name"`
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Data string `json:"data"`
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} `json:"domain_record"`
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}
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fqdn, value, _ := acme.DNS01Record(domain, keyAuth)
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reqURL := fmt.Sprintf("%s/v2/domains/%s/records", digitalOceanBaseURL, domain)
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reqData := txtRecordRequest{RecordType: "TXT", Name: fqdn, Data: value}
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body, err := json.Marshal(reqData)
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if err != nil {
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return err
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}
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req, err := http.NewRequest("POST", reqURL, bytes.NewReader(body))
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if err != nil {
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return 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.apiAuthToken))
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client := http.Client{Timeout: 30 * time.Second}
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resp, err := client.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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var errInfo digitalOceanAPIError
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json.NewDecoder(resp.Body).Decode(&errInfo)
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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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// Everything looks good; but we'll need the ID later to delete the record
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var respData txtRecordResponse
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err = json.NewDecoder(resp.Body).Decode(&respData)
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if err != nil {
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return err
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}
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d.recordIDsMu.Lock()
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d.recordIDs[fqdn] = respData.DomainRecord.ID
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d.recordIDsMu.Unlock()
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return nil
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}
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// CleanUp removes the TXT record matching the specified parameters
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func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
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// get the record's unique ID from when we created it
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d.recordIDsMu.Lock()
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recordID, ok := d.recordIDs[fqdn]
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d.recordIDsMu.Unlock()
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if !ok {
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return fmt.Errorf("unknown record ID for '%s'", fqdn)
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}
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reqURL := fmt.Sprintf("%s/v2/domains/%s/records/%d", digitalOceanBaseURL, domain, recordID)
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req, err := http.NewRequest("DELETE", reqURL, nil)
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if err != nil {
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return 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.apiAuthToken))
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client := http.Client{Timeout: 30 * time.Second}
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resp, err := client.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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var errInfo digitalOceanAPIError
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json.NewDecoder(resp.Body).Decode(&errInfo)
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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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// Delete record ID from map
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d.recordIDsMu.Lock()
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delete(d.recordIDs, fqdn)
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d.recordIDsMu.Unlock()
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return nil
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}
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type digitalOceanAPIError 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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var digitalOceanBaseURL = "https://api.digitalocean.com"
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