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mydnsjp.go
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mydnsjp.go
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// Package mydnsjp implements a DNS provider for solving the DNS-01
// challenge using MyDNS.jp.
package mydnsjp
import (
"errors"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"strings"
"time"
"github.com/xenolf/lego/acme"
"github.com/xenolf/lego/platform/config/env"
)
const defaultBaseURL = "https://www.mydns.jp/directedit.html"
// Config is used to configure the creation of the DNSProvider
type Config struct {
MasterID string
Password string
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
return &Config{
PropagationTimeout: env.GetOrDefaultSecond("MYDNSJP_PROPAGATION_TIMEOUT", 2*time.Minute),
PollingInterval: env.GetOrDefaultSecond("MYDNSJP_POLLING_INTERVAL", 2*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("MYDNSJP_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider is an implementation of the acme.ChallengeProvider interface
type DNSProvider struct {
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for MyDNS.jp.
// Credentials must be passed in the environment variables: MYDNSJP_MASTER_ID and MYDNSJP_PASSWORD.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get("MYDNSJP_MASTER_ID", "MYDNSJP_PASSWORD")
if err != nil {
return nil, fmt.Errorf("mydnsjp: %v", err)
}
config := NewDefaultConfig()
config.MasterID = values["MYDNSJP_MASTER_ID"]
config.Password = values["MYDNSJP_PASSWORD"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for MyDNS.jp.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("mydnsjp: the configuration of the DNS provider is nil")
}
if config.MasterID == "" || config.Password == "" {
return nil, errors.New("mydnsjp: some credentials information are missing")
}
return &DNSProvider{config: config}, nil
}
// Timeout returns the timeout and interval to use when checking for DNS propagation.
// Adjusting here to cope with spikes in propagation times.
func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
return d.config.PropagationTimeout, d.config.PollingInterval
}
// Present creates a TXT record to fulfill the dns-01 challenge
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
_, value, _ := acme.DNS01Record(domain, keyAuth)
err := d.doRequest(domain, value, "REGIST")
if err != nil {
return fmt.Errorf("mydnsjp: %v", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
_, value, _ := acme.DNS01Record(domain, keyAuth)
err := d.doRequest(domain, value, "DELETE")
if err != nil {
return fmt.Errorf("mydnsjp: %v", err)
}
return nil
}
func (d *DNSProvider) doRequest(domain, value string, cmd string) error {
req, err := d.buildRequest(domain, value, cmd)
if err != nil {
return err
}
resp, err := d.config.HTTPClient.Do(req)
if err != nil {
return fmt.Errorf("error querying API: %v", err)
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
var content []byte
content, err = ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
return fmt.Errorf("request %s failed [status code %d]: %s", req.URL, resp.StatusCode, string(content))
}
return nil
}
func (d *DNSProvider) buildRequest(domain, value string, cmd string) (*http.Request, error) {
params := url.Values{}
params.Set("CERTBOT_DOMAIN", domain)
params.Set("CERTBOT_VALIDATION", value)
params.Set("EDIT_CMD", cmd)
req, err := http.NewRequest(http.MethodPost, defaultBaseURL, strings.NewReader(params.Encode()))
if err != nil {
return nil, fmt.Errorf("invalid request: %v", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.SetBasicAuth(d.config.MasterID, d.config.Password)
return req, nil
}