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lego/providers/dns/cloudns/cloudns.go
2019-08-20 18:40:41 +02:00

122 lines
3.4 KiB
Go

// Package cloudns implements a DNS provider for solving the DNS-01 challenge using ClouDNS DNS.
package cloudns
import (
"errors"
"fmt"
"net/http"
"time"
"github.com/go-acme/lego/v3/challenge/dns01"
"github.com/go-acme/lego/v3/platform/config/env"
"github.com/go-acme/lego/v3/providers/dns/cloudns/internal"
)
// Config is used to configure the creation of the DNSProvider
type Config struct {
AuthID string
AuthPassword string
PropagationTimeout time.Duration
PollingInterval time.Duration
TTL int
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
return &Config{
PropagationTimeout: env.GetOrDefaultSecond("CLOUDNS_PROPAGATION_TIMEOUT", 120*time.Second),
PollingInterval: env.GetOrDefaultSecond("CLOUDNS_POLLING_INTERVAL", 4*time.Second),
TTL: env.GetOrDefaultInt("CLOUDNS_TTL", 60),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("CLOUDNS_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider is an implementation of the challenge.Provider interface
type DNSProvider struct {
config *Config
client *internal.Client
}
// NewDNSProvider returns a DNSProvider instance configured for ClouDNS.
// Credentials must be passed in the environment variables:
// CLOUDNS_AUTH_ID and CLOUDNS_AUTH_PASSWORD.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get("CLOUDNS_AUTH_ID", "CLOUDNS_AUTH_PASSWORD")
if err != nil {
return nil, fmt.Errorf("ClouDNS: %v", err)
}
config := NewDefaultConfig()
config.AuthID = values["CLOUDNS_AUTH_ID"]
config.AuthPassword = values["CLOUDNS_AUTH_PASSWORD"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for ClouDNS.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("ClouDNS: the configuration of the DNS provider is nil")
}
client, err := internal.NewClient(config.AuthID, config.AuthPassword)
if err != nil {
return nil, fmt.Errorf("ClouDNS: %v", err)
}
client.HTTPClient = config.HTTPClient
return &DNSProvider{client: client, config: config}, nil
}
// Present creates a TXT record to fulfill the dns-01 challenge.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
zone, err := d.client.GetZone(fqdn)
if err != nil {
return fmt.Errorf("ClouDNS: %v", err)
}
err = d.client.AddTxtRecord(zone.Name, fqdn, value, d.config.TTL)
if err != nil {
return fmt.Errorf("ClouDNS: %v", 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)
zone, err := d.client.GetZone(fqdn)
if err != nil {
return fmt.Errorf("ClouDNS: %v", err)
}
record, err := d.client.FindTxtRecord(zone.Name, fqdn)
if err != nil {
return fmt.Errorf("ClouDNS: %v", err)
}
if record == nil {
return nil
}
err = d.client.RemoveTxtRecord(record.ID, zone.Name)
if err != nil {
return fmt.Errorf("ClouDNS: %v", 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
}