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// Package clouddns implements a DNS provider for solving the DNS-01 challenge using CloudDNS API.
package clouddns
import (
"errors"
"fmt"
"net/http"
"time"
"github.com/go-acme/lego/v4/challenge/dns01"
"github.com/go-acme/lego/v4/platform/config/env"
"github.com/go-acme/lego/v4/providers/dns/clouddns/internal"
)
// Environment variables names.
const (
envNamespace = "CLOUDDNS_"
EnvClientID = envNamespace + "CLIENT_ID"
EnvEmail = envNamespace + "EMAIL"
EnvPassword = envNamespace + "PASSWORD"
EnvTTL = envNamespace + "TTL"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
)
// Config is used to configure the DNSProvider.
type Config struct {
ClientID string
Email string
Password string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
TTL: env.GetOrDefaultInt(EnvTTL, 300),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 120*time.Second),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 5*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
},
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
client *internal.Client
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for CloudDNS.
// Credentials must be passed in the environment variables:
// CLOUDDNS_CLIENT_ID, CLOUDDNS_EMAIL, CLOUDDNS_PASSWORD.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvClientID, EnvEmail, EnvPassword)
if err != nil {
return nil, fmt.Errorf("clouddns: %w", err)
}
config := NewDefaultConfig()
config.ClientID = values[EnvClientID]
config.Email = values[EnvEmail]
config.Password = values[EnvPassword]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for CloudDNS.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("clouddns: the configuration of the DNS provider is nil")
}
if config.ClientID == "" || config.Email == "" || config.Password == "" {
return nil, errors.New("clouddns: credentials missing")
}
client := internal.NewClient(config.ClientID, config.Email, config.Password, config.TTL)
if config.HTTPClient != nil {
client.HTTPClient = config.HTTPClient
}
return &DNSProvider{
client: client,
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 using the specified parameters.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return fmt.Errorf("clouddns: %w", err)
}
err = d.client.AddRecord(authZone, fqdn, value)
if err != nil {
return fmt.Errorf("clouddns: %w", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _ := dns01.GetRecord(domain, keyAuth)
authZone, err := dns01.FindZoneByFqdn(fqdn)
if err != nil {
return fmt.Errorf("clouddns: %w", err)
}
err = d.client.DeleteRecord(authZone, fqdn)
if err != nil {
return fmt.Errorf("clouddns: %w", err)
}
return nil
}
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