197 lines
5.1 KiB
Go
197 lines
5.1 KiB
Go
// Package dnspod implements a DNS provider for solving the DNS-01 challenge using dnspod DNS.
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package dnspod
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import (
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"errors"
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"fmt"
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"net/http"
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"strconv"
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"time"
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"github.com/go-acme/lego/v4/challenge/dns01"
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"github.com/go-acme/lego/v4/platform/config/env"
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"github.com/nrdcg/dnspod-go"
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)
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// Environment variables names.
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const (
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envNamespace = "DNSPOD_"
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EnvAPIKey = envNamespace + "API_KEY"
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EnvTTL = envNamespace + "TTL"
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EnvPropagationTimeout = envNamespace + "PROPAGATION_TIMEOUT"
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EnvPollingInterval = envNamespace + "POLLING_INTERVAL"
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EnvHTTPTimeout = envNamespace + "HTTP_TIMEOUT"
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)
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// Config is used to configure the creation of the DNSProvider.
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type Config struct {
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LoginToken string
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TTL int
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PropagationTimeout time.Duration
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PollingInterval time.Duration
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HTTPClient *http.Client
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}
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// NewDefaultConfig returns a default configuration for the DNSProvider.
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func NewDefaultConfig() *Config {
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return &Config{
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TTL: env.GetOrDefaultInt(EnvTTL, 600),
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PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
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PollingInterval: env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
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HTTPClient: &http.Client{
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Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
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},
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}
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}
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// DNSProvider implements the challenge.Provider interface.
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type DNSProvider struct {
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config *Config
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client *dnspod.Client
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}
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// NewDNSProvider returns a DNSProvider instance configured for dnspod.
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// Credentials must be passed in the environment variables: DNSPOD_API_KEY.
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func NewDNSProvider() (*DNSProvider, error) {
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values, err := env.Get(EnvAPIKey)
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if err != nil {
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return nil, fmt.Errorf("dnspod: %w", err)
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}
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config := NewDefaultConfig()
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config.LoginToken = values[EnvAPIKey]
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return NewDNSProviderConfig(config)
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}
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// NewDNSProviderConfig return a DNSProvider instance configured for dnspod.
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func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
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if config == nil {
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return nil, errors.New("dnspod: the configuration of the DNS provider is nil")
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}
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if config.LoginToken == "" {
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return nil, errors.New("dnspod: credentials missing")
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}
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params := dnspod.CommonParams{LoginToken: config.LoginToken, Format: "json"}
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client := dnspod.NewClient(params)
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client.HTTPClient = config.HTTPClient
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return &DNSProvider{client: client, config: config}, nil
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}
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// Present creates a TXT record to fulfill the dns-01 challenge.
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func (d *DNSProvider) Present(domain, token, keyAuth string) error {
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fqdn, value := dns01.GetRecord(domain, keyAuth)
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zoneID, zoneName, err := d.getHostedZone(fqdn)
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if err != nil {
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return err
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}
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recordAttributes, err := d.newTxtRecord(zoneName, fqdn, value, d.config.TTL)
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if err != nil {
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return err
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}
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_, _, err = d.client.Records.Create(zoneID, *recordAttributes)
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if err != nil {
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return fmt.Errorf("API call failed: %w", err)
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}
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return nil
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}
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// CleanUp removes the TXT record matching the specified parameters.
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func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _ := dns01.GetRecord(domain, keyAuth)
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zoneID, zoneName, err := d.getHostedZone(fqdn)
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if err != nil {
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return err
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}
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records, err := d.findTxtRecords(fqdn, zoneID, zoneName)
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if err != nil {
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return err
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}
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for _, rec := range records {
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_, err := d.client.Records.Delete(zoneID, rec.ID)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// Timeout returns the timeout and interval to use when checking for DNS propagation.
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// Adjusting here to cope with spikes in propagation times.
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func (d *DNSProvider) Timeout() (timeout, interval time.Duration) {
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return d.config.PropagationTimeout, d.config.PollingInterval
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}
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func (d *DNSProvider) getHostedZone(domain string) (string, string, error) {
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zones, _, err := d.client.Domains.List()
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if err != nil {
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return "", "", fmt.Errorf("API call failed: %w", err)
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}
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authZone, err := dns01.FindZoneByFqdn(domain)
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if err != nil {
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return "", "", err
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}
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var hostedZone dnspod.Domain
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for _, zone := range zones {
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if zone.Name == dns01.UnFqdn(authZone) {
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hostedZone = zone
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}
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}
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if hostedZone.ID == "" || hostedZone.ID == "0" {
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return "", "", fmt.Errorf("zone %s not found in dnspod for domain %s", authZone, domain)
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}
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return hostedZone.ID.String(), hostedZone.Name, nil
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}
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func (d *DNSProvider) newTxtRecord(zone, fqdn, value string, ttl int) (*dnspod.Record, error) {
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subDomain, err := dns01.ExtractSubDomain(fqdn, zone)
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if err != nil {
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return nil, err
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}
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return &dnspod.Record{
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Type: "TXT",
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Name: subDomain,
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Value: value,
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Line: "默认",
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TTL: strconv.Itoa(ttl),
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}, nil
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}
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func (d *DNSProvider) findTxtRecords(fqdn, zoneID, zoneName string) ([]dnspod.Record, error) {
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subDomain, err := dns01.ExtractSubDomain(fqdn, zoneName)
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if err != nil {
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return nil, err
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}
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var records []dnspod.Record
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result, _, err := d.client.Records.List(zoneID, subDomain)
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if err != nil {
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return records, fmt.Errorf("API call has failed: %w", err)
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}
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for _, record := range result {
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if record.Name == subDomain {
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records = append(records, record)
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}
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}
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return records, nil
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}
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