mirror of
https://github.com/StackExchange/dnscontrol.git
synced 2024-09-21 15:26:32 +08:00
324 lines
9.2 KiB
Go
324 lines
9.2 KiB
Go
package namecheap
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import (
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"encoding/json"
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"fmt"
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"sort"
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"strings"
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"time"
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"github.com/StackExchange/dnscontrol/v3/models"
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"github.com/StackExchange/dnscontrol/v3/pkg/diff"
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"github.com/StackExchange/dnscontrol/v3/pkg/printer"
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"github.com/StackExchange/dnscontrol/v3/providers"
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nc "github.com/billputer/go-namecheap"
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"golang.org/x/net/publicsuffix"
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)
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// NamecheapDefaultNs lists the default nameservers for this provider.
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var NamecheapDefaultNs = []string{"dns1.registrar-servers.com", "dns2.registrar-servers.com"}
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// namecheapProvider is the handle for this provider.
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type namecheapProvider struct {
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APIKEY string
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APIUser string
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client *nc.Client
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}
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var features = providers.DocumentationNotes{
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providers.CanGetZones: providers.Can(),
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providers.CanUseAlias: providers.Can(),
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providers.CanUseCAA: providers.Can(),
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providers.CanUsePTR: providers.Cannot(),
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providers.CanUseSRV: providers.Cannot("The namecheap web console allows you to make SRV records, but their api does not let you read or set them"),
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providers.CanUseTLSA: providers.Cannot(),
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providers.CantUseNOPURGE: providers.Cannot(),
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providers.DocCreateDomains: providers.Cannot("Requires domain registered through their service"),
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providers.DocDualHost: providers.Cannot("Doesn't allow control of apex NS records"),
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providers.DocOfficiallySupported: providers.Cannot(),
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}
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func init() {
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providers.RegisterRegistrarType("NAMECHEAP", newReg)
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fns := providers.DspFuncs{
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Initializer: newDsp,
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RecordAuditor: AuditRecords,
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}
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providers.RegisterDomainServiceProviderType("NAMECHEAP", fns, features)
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providers.RegisterCustomRecordType("URL", "NAMECHEAP", "")
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providers.RegisterCustomRecordType("URL301", "NAMECHEAP", "")
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providers.RegisterCustomRecordType("FRAME", "NAMECHEAP", "")
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}
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func newDsp(conf map[string]string, metadata json.RawMessage) (providers.DNSServiceProvider, error) {
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return newProvider(conf, metadata)
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}
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func newReg(conf map[string]string) (providers.Registrar, error) {
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return newProvider(conf, nil)
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}
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func newProvider(m map[string]string, metadata json.RawMessage) (*namecheapProvider, error) {
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api := &namecheapProvider{}
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api.APIUser, api.APIKEY = m["apiuser"], m["apikey"]
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if api.APIKEY == "" || api.APIUser == "" {
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return nil, fmt.Errorf("missing Namecheap apikey and apiuser")
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}
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api.client = nc.NewClient(api.APIUser, api.APIKEY, api.APIUser)
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// if BaseURL is specified in creds, use that url
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BaseURL, ok := m["BaseURL"]
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if ok {
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api.client.BaseURL = BaseURL
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}
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return api, nil
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}
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func splitDomain(domain string) (sld string, tld string) {
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tld, _ = publicsuffix.PublicSuffix(domain)
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d, _ := publicsuffix.EffectiveTLDPlusOne(domain)
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sld = strings.Split(d, ".")[0]
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return sld, tld
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}
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// namecheap has request limiting at unpublished limits
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// from support in SEP-2017:
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//
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// "The limits for the API calls will be 20/Min, 700/Hour and 8000/Day for one user.
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// If you can limit the requests within these it should be fine."
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//
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// this helper performs some api action, checks for rate limited response, and if so, enters a retry loop until it resolves
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// if you are consistently hitting this, you may have success asking their support to increase your account's limits.
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func doWithRetry(f func() error) {
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// sleep 5 seconds at a time, up to 23 times (1 minute, 15 seconds)
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const maxRetries = 23
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const sleepTime = 5 * time.Second
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var currentRetry int
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for {
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err := f()
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if err == nil {
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return
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}
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if strings.Contains(err.Error(), "Error 500000: Too many requests") {
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currentRetry++
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if currentRetry >= maxRetries {
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return
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}
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printer.Printf("Namecheap rate limit exceeded. Waiting %s to retry.\n", sleepTime)
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time.Sleep(sleepTime)
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} else {
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return
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}
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}
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}
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// GetZoneRecords gets the records of a zone and returns them in RecordConfig format.
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func (n *namecheapProvider) GetZoneRecords(domain string) (models.Records, error) {
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sld, tld := splitDomain(domain)
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var records *nc.DomainDNSGetHostsResult
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var err error
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doWithRetry(func() error {
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records, err = n.client.DomainsDNSGetHosts(sld, tld)
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return err
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})
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if err != nil {
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return nil, err
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}
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return toRecords(records, domain)
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}
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// GetDomainCorrections returns the corrections for the domain.
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func (n *namecheapProvider) GetDomainCorrections(dc *models.DomainConfig) ([]*models.Correction, error) {
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dc.Punycode()
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sld, tld := splitDomain(dc.Name)
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var records *nc.DomainDNSGetHostsResult
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var err error
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doWithRetry(func() error {
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records, err = n.client.DomainsDNSGetHosts(sld, tld)
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return err
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})
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if err != nil {
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return nil, err
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}
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var actual []*models.RecordConfig
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// namecheap does not allow setting @ NS with basic DNS
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dc.Filter(func(r *models.RecordConfig) bool {
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if r.Type == "NS" && r.GetLabel() == "@" {
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if !strings.HasSuffix(r.GetTargetField(), "registrar-servers.com.") {
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printer.Println("\n", r.GetTargetField(), "Namecheap does not support changing apex NS records. Skipping.")
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}
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return false
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}
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return true
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})
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// namecheap has this really annoying feature where they add some parking records if you have no records.
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// This causes a few problems for our purposes, specifically the integration tests.
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// lets detect that one case and pretend it is a no-op.
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if len(dc.Records) == 0 && len(records.Hosts) == 2 {
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if records.Hosts[0].Type == "CNAME" &&
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strings.Contains(records.Hosts[0].Address, "parkingpage") &&
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records.Hosts[1].Type == "URL" {
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return nil, nil
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}
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}
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for _, r := range records.Hosts {
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if r.Type == "SOA" {
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continue
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}
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rec := &models.RecordConfig{
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Type: r.Type,
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TTL: uint32(r.TTL),
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MxPreference: uint16(r.MXPref),
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Original: r,
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}
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rec.SetLabel(r.Name, dc.Name)
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switch rtype := r.Type; rtype { // #rtype_variations
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case "TXT":
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rec.SetTargetTXT(r.Address)
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case "CAA":
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rec.SetTargetCAAString(r.Address)
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default:
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rec.SetTarget(r.Address)
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}
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actual = append(actual, rec)
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}
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// Normalize
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models.PostProcessRecords(actual)
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differ := diff.New(dc)
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_, create, delete, modify, err := differ.IncrementalDiff(actual)
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if err != nil {
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return nil, err
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}
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// // because namecheap doesn't have selective create, delete, modify,
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// // we bundle them all up to send at once. We *do* want to see the
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// // changes though
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var desc []string
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for _, i := range create {
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desc = append(desc, "\n"+i.String())
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}
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for _, i := range delete {
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desc = append(desc, "\n"+i.String())
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}
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for _, i := range modify {
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desc = append(desc, "\n"+i.String())
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}
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msg := fmt.Sprintf("GENERATE_ZONE: %s (%d records)%s", dc.Name, len(dc.Records), desc)
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corrections := []*models.Correction{}
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// only create corrections if there are changes
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if len(desc) > 0 {
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corrections = append(corrections,
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&models.Correction{
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Msg: msg,
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F: func() error {
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return n.generateRecords(dc)
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},
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})
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}
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return corrections, nil
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}
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func toRecords(result *nc.DomainDNSGetHostsResult, origin string) ([]*models.RecordConfig, error) {
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var records []*models.RecordConfig
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for _, dnsHost := range result.Hosts {
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record := models.RecordConfig{
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Type: dnsHost.Type,
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TTL: uint32(dnsHost.TTL),
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MxPreference: uint16(dnsHost.MXPref),
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Name: dnsHost.Name,
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}
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record.PopulateFromString(dnsHost.Type, dnsHost.Address, origin)
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records = append(records, &record)
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}
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return records, nil
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}
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func (n *namecheapProvider) generateRecords(dc *models.DomainConfig) error {
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var recs []nc.DomainDNSHost
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id := 1
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for _, r := range dc.Records {
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var value string
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switch rtype := r.Type; rtype { // #rtype_variations
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case "CAA":
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value = r.GetTargetCombined()
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default:
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value = r.GetTargetField()
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}
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rec := nc.DomainDNSHost{
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ID: id,
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Name: r.GetLabel(),
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Type: r.Type,
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Address: value,
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MXPref: int(r.MxPreference),
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TTL: int(r.TTL),
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}
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recs = append(recs, rec)
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id++
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}
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sld, tld := splitDomain(dc.Name)
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var err error
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doWithRetry(func() error {
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_, err = n.client.DomainDNSSetHosts(sld, tld, recs)
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return err
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})
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return err
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}
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// GetNameservers returns the nameservers for a domain.
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func (n *namecheapProvider) GetNameservers(domainName string) ([]*models.Nameserver, error) {
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// return default namecheap nameservers
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return models.ToNameservers(NamecheapDefaultNs)
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}
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// GetRegistrarCorrections returns corrections to update nameservers.
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func (n *namecheapProvider) GetRegistrarCorrections(dc *models.DomainConfig) ([]*models.Correction, error) {
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var info *nc.DomainInfo
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var err error
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doWithRetry(func() error {
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info, err = n.client.DomainGetInfo(dc.Name)
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return err
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})
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if err != nil {
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return nil, err
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}
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sort.Strings(info.DNSDetails.Nameservers)
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found := strings.Join(info.DNSDetails.Nameservers, ",")
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desiredNs := []string{}
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for _, d := range dc.Nameservers {
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desiredNs = append(desiredNs, d.Name)
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}
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sort.Strings(desiredNs)
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desired := strings.Join(desiredNs, ",")
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if found != desired {
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parts := strings.SplitN(dc.Name, ".", 2)
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sld, tld := parts[0], parts[1]
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return []*models.Correction{
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{
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Msg: fmt.Sprintf("Change Nameservers from '%s' to '%s'", found, desired),
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F: func() (err error) {
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doWithRetry(func() error {
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_, err = n.client.DomainDNSSetCustom(sld, tld, desired)
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return err
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})
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return
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}},
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}, nil
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}
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return nil, nil
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}
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