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// Package simply implements a DNS provider for solving the DNS-01 challenge using Simply.com.
package simply
import (
"errors"
"fmt"
"net/http"
"strings"
"sync"
"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/simply/internal"
)
// Environment variables names.
const (
envNamespace = "SIMPLY_"
EnvAccountName = envNamespace + "ACCOUNT_NAME"
EnvAPIKey = envNamespace + "API_KEY"
EnvTTL = envNamespace + "TTL"
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 {
AccountName string
APIKey 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{
TTL: env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, 5*time.Minute),
PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, 10*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
},
}
}
// DNSProvider implements the challenge.Provider interface.
type DNSProvider struct {
config *Config
client *internal.Client
recordIDs map[string]int64
recordIDsMu sync.Mutex
}
// NewDNSProvider returns a DNSProvider instance configured for Simply.com.
// Credentials must be passed in the environment variable: SIMPLY_ACCOUNT_NAME, SIMPLY_API_KEY.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(EnvAccountName, EnvAPIKey)
if err != nil {
return nil, fmt.Errorf("simply: %w", err)
}
config := NewDefaultConfig()
config.AccountName = values[EnvAccountName]
config.APIKey = values[EnvAPIKey]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Simply.com.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("simply: the configuration of the DNS provider is nil")
}
if config.AccountName == "" {
return nil, errors.New("simply: missing credentials: account name")
}
if config.APIKey == "" {
return nil, errors.New("simply: missing credentials: api key")
}
client, err := internal.NewClient(config.AccountName, config.APIKey)
if err != nil {
return nil, fmt.Errorf("simply: failed to create client: %w", err)
}
if config.HTTPClient != nil {
client.HTTPClient = config.HTTPClient
}
return &DNSProvider{
config: config,
client: client,
recordIDs: make(map[string]int64),
}, 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("simply: could not determine zone for domain %q: %w", domain, err)
}
authZone = dns01.UnFqdn(authZone)
subDomain := dns01.UnFqdn(strings.TrimSuffix(fqdn, authZone))
recordBody := internal.Record{
Name: subDomain,
Data: value,
Type: "TXT",
TTL: d.config.TTL,
}
recordID, err := d.client.AddRecord(authZone, recordBody)
if err != nil {
return fmt.Errorf("simply: failed to add record: %w", err)
}
d.recordIDsMu.Lock()
d.recordIDs[token] = recordID
d.recordIDsMu.Unlock()
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("simply: could not determine zone for domain %q: %w", domain, err)
}
authZone = dns01.UnFqdn(authZone)
// gets the record's unique ID from when we created it
d.recordIDsMu.Lock()
recordID, ok := d.recordIDs[token]
d.recordIDsMu.Unlock()
if !ok {
return fmt.Errorf("simply: unknown record ID for '%s' '%s'", fqdn, token)
}
err = d.client.DeleteRecord(authZone, recordID)
if err != nil {
return fmt.Errorf("simply: failed to delete TXT records: fqdn=%s, recordID=%d: %w", fqdn, recordID, err)
}
// deletes record ID from map
d.recordIDsMu.Lock()
delete(d.recordIDs, token)
d.recordIDsMu.Unlock()
return nil
}
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