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namedotcom.go
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namedotcom.go
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// Package namedotcom implements a DNS provider for solving the DNS-01 challenge
// using Name.com's DNS service.
package namedotcom
import (
"fmt"
"os"
"strings"
"github.com/namedotcom/go/namecom"
"github.com/xenolf/lego/acme"
)
// DNSProvider is an implementation of the acme.ChallengeProvider interface.
type DNSProvider struct {
client *namecom.NameCom
}
// NewDNSProvider returns a DNSProvider instance configured for namedotcom.
// Credentials must be passed in the environment variables: NAMECOM_USERNAME and NAMECOM_API_TOKEN
func NewDNSProvider() (*DNSProvider, error) {
username := os.Getenv("NAMECOM_USERNAME")
apiToken := os.Getenv("NAMECOM_API_TOKEN")
server := os.Getenv("NAMECOM_SERVER")
return NewDNSProviderCredentials(username, apiToken, server)
}
// NewDNSProviderCredentials uses the supplied credentials to return a
// DNSProvider instance configured for namedotcom.
func NewDNSProviderCredentials(username, apiToken, server string) (*DNSProvider, error) {
if username == "" {
return nil, fmt.Errorf("Name.com Username is required")
}
if apiToken == "" {
return nil, fmt.Errorf("Name.com API token is required")
}
client := namecom.New(username, apiToken)
if server != "" {
client.Server = server
}
return &DNSProvider{client: client}, nil
}
// Present creates a TXT record to fulfil the dns-01 challenge.
func (c *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value, ttl := acme.DNS01Record(domain, keyAuth)
request := &namecom.Record{
DomainName: domain,
Host: c.extractRecordName(fqdn, domain),
Type: "TXT",
TTL: uint32(ttl),
Answer: value,
}
_, err := c.client.CreateRecord(request)
if err != nil {
return fmt.Errorf("namedotcom API call failed: %v", err)
}
return nil
}
// CleanUp removes the TXT record matching the specified parameters.
func (c *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
records, err := c.getRecords(domain)
if err != nil {
return err
}
for _, rec := range records {
if rec.Fqdn == fqdn && rec.Type == "TXT" {
request := &namecom.DeleteRecordRequest{
DomainName: domain,
ID: rec.ID,
}
_, err := c.client.DeleteRecord(request)
if err != nil {
return err
}
}
}
return nil
}
func (c *DNSProvider) getRecords(domain string) ([]*namecom.Record, error) {
var (
err error
records []*namecom.Record
response *namecom.ListRecordsResponse
)
request := &namecom.ListRecordsRequest{
DomainName: domain,
Page: 1,
}
for request.Page > 0 {
response, err = c.client.ListRecords(request)
if err != nil {
return nil, err
}
records = append(records, response.Records...)
request.Page = response.NextPage
}
return records, nil
}
func (c *DNSProvider) extractRecordName(fqdn, domain string) string {
name := acme.UnFqdn(fqdn)
if idx := strings.Index(name, "."+domain); idx != -1 {
return name[:idx]
}
return name
}