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lego/providers/dns/cloudflare/cloudflare.go

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// Package cloudflare implements a DNS provider for solving the DNS-01
// challenge using cloudflare DNS.
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package cloudflare
import (
"errors"
"fmt"
"net/http"
"time"
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"github.com/xenolf/lego/acme"
"github.com/xenolf/lego/platform/config/env"
)
// CloudFlareAPIURL represents the API endpoint to call.
const CloudFlareAPIURL = defaultBaseURL // Deprecated
// Config is used to configure the creation of the DNSProvider
type Config struct {
AuthEmail string
AuthKey string
TTL int
PropagationTimeout time.Duration
PollingInterval time.Duration
HTTPClient *http.Client
}
// NewDefaultConfig returns a default configuration for the DNSProvider
func NewDefaultConfig() *Config {
return &Config{
TTL: env.GetOrDefaultInt("CLOUDFLARE_TTL", 120),
PropagationTimeout: env.GetOrDefaultSecond("CLOUDFLARE_PROPAGATION_TIMEOUT", 2*time.Minute),
PollingInterval: env.GetOrDefaultSecond("CLOUDFLARE_POLLING_INTERVAL", 2*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond("CLOUDFLARE_HTTP_TIMEOUT", 30*time.Second),
},
}
}
// DNSProvider is an implementation of the acme.ChallengeProvider interface
type DNSProvider struct {
client *Client
config *Config
}
// NewDNSProvider returns a DNSProvider instance configured for Cloudflare.
// Credentials must be passed in the environment variables:
// CLOUDFLARE_EMAIL and CLOUDFLARE_API_KEY.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.GetWithFallback(
[]string{"CLOUDFLARE_EMAIL", "CF_API_EMAIL"},
[]string{"CLOUDFLARE_API_KEY", "CF_API_KEY"})
if err != nil {
return nil, fmt.Errorf("cloudflare: %v", err)
}
config := NewDefaultConfig()
config.AuthEmail = values["CLOUDFLARE_EMAIL"]
config.AuthKey = values["CLOUDFLARE_API_KEY"]
return NewDNSProviderConfig(config)
}
// NewDNSProviderCredentials uses the supplied credentials
// to return a DNSProvider instance configured for Cloudflare.
// Deprecated
func NewDNSProviderCredentials(email, key string) (*DNSProvider, error) {
config := NewDefaultConfig()
config.AuthEmail = email
config.AuthKey = key
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Cloudflare.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("cloudflare: the configuration of the DNS provider is nil")
}
client, err := NewClient(config.AuthEmail, config.AuthKey)
if err != nil {
return nil, err
}
client.HTTPClient = config.HTTPClient
// TODO: must be remove. keep only for compatibility reason.
client.BaseURL = CloudFlareAPIURL
return &DNSProvider{
client: client,
config: config,
}, 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 to fulfill the dns-01 challenge
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value, _ := acme.DNS01Record(domain, keyAuth)
rec := TxtRecord{
Type: "TXT",
Name: acme.UnFqdn(fqdn),
Content: value,
TTL: d.config.TTL,
}
return d.client.AddTxtRecord(fqdn, rec)
}
// CleanUp removes the TXT record matching the specified parameters
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
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fqdn, _, _ := acme.DNS01Record(domain, keyAuth)
return d.client.RemoveTxtRecord(fqdn)
}