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dreamhost.go
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dreamhost.go
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// Package dreamhost implements a DNS provider for solving the DNS-01 challenge using DreamHost.
// See https://help.dreamhost.com/hc/en-us/articles/217560167-API_overview
// and https://help.dreamhost.com/hc/en-us/articles/217555707-DNS-API-commands for the API spec.
package dreamhost
import (
"errors"
"fmt"
"net/http"
"time"
"github.com/LukasDeco/lego/v4/challenge/dns01"
"github.com/LukasDeco/lego/v4/platform/config/env"
)
// Environment variables names.
const (
envNamespace = "DREAMHOST_"
EnvAPIKey = envNamespace + "API_KEY"
EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
BaseURL string
APIKey string
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider.
func NewDefaultConfig() *Config {
return &Config{
BaseURL: defaultBaseURL,
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 60*time.Minute),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 1*time.Minute),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
},
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
config *Config
}
// NewDNSProvider returns a new DNS provider using
// environment variable DREAMHOST_API_KEY for adding and removing the DNS record.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvAPIKey)
if err != nil {
return nil, fmt.Errorf("dreamhost: %w", err)
}
config := NewDefaultConfig()
config.APIKey = values[EnvAPIKey]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for DreamHost.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("dreamhost: the configuration of the DNS provider is nil")
}
if config.APIKey == "" {
return nil, errors.New("dreamhost: credentials missing")
}
if config.BaseURL == "" {
config.BaseURL = defaultBaseURL
}
return &DNSProvider{config: config}, nil
}
// Present creates a TXT record using the specified parameters.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
record := dns01.UnFqdn(info.EffectiveFQDN)
u, err := d.buildQuery(cmdAddRecord, record, info.Value)
if err != nil {
return fmt.Errorf("dreamhost: %w", err)
}
err = d.updateTxtRecord(u)
if err != nil {
return fmt.Errorf("dreamhost: %w", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
info := dns01.GetChallengeInfo(domain, keyAuth)
record := dns01.UnFqdn(info.EffectiveFQDN)
u, err := d.buildQuery(cmdRemoveRecord, record, info.Value)
if err != nil {
return fmt.Errorf("dreamhost: %w", err)
}
err = d.updateTxtRecord(u)
if err != nil {
return fmt.Errorf("dreamhost: %w", err)
}
return 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
}