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lego/providers/dns/vscale/vscale.go
2019-03-11 17:56:48 +01:00

156 lines
4.4 KiB
Go

// Package vscale implements a DNS provider for solving the DNS-01 challenge using Vscale Domains API.
// Vscale Domain API reference: https://developers.vscale.io/documentation/api/v1/#api-Domains
// Token: https://vscale.io/panel/settings/tokens/
package vscale
import (
"errors"
"fmt"
"net/http"
"time"
"github.com/go-acme/lego/challenge/dns01"
"github.com/go-acme/lego/providers/dns/vscale/internal"
"github.com/go-acme/lego/platform/config/env"
)
const (
defaultBaseURL = "https://api.vscale.io/v1/domains"
minTTL = 60
)
const (
envNamespace = "VSCALE_"
baseURLEnvVar = envNamespace + "BASE_URL"
apiTokenEnvVar = envNamespace + "API_TOKEN"
ttlEnvVar = envNamespace + "TTL"
propagationTimeoutEnvVar = envNamespace + "PROPAGATION_TIMEOUT"
pollingIntervalEnvVar = envNamespace + "POLLING_INTERVAL"
httpTimeoutEnvVar = envNamespace + "HTTP_TIMEOUT"
)
// Config is used to configure the creation of the DNSProvider.
type Config struct {
BaseURL string
Token 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{
BaseURL: env.GetOrDefaultString(baseURLEnvVar, defaultBaseURL),
TTL: env.GetOrDefaultInt(ttlEnvVar, minTTL),
PropagationTimeout: env.GetOrDefaultSecond(propagationTimeoutEnvVar, 120*time.Second),
PollingInterval: env.GetOrDefaultSecond(pollingIntervalEnvVar, 2*time.Second),
HTTPClient: &http.Client{
Timeout: env.GetOrDefaultSecond(httpTimeoutEnvVar, 30*time.Second),
},
}
}
// DNSProvider is an implementation of the acme.ChallengeProvider interface.
type DNSProvider struct {
config *Config
client *internal.Client
}
// NewDNSProvider returns a DNSProvider instance configured for Vscale Domains API.
// API token must be passed in the environment variable VSCALE_API_TOKEN.
func NewDNSProvider() (*DNSProvider, error) {
values, err := env.Get(apiTokenEnvVar)
if err != nil {
return nil, fmt.Errorf("vscale: %v", err)
}
config := NewDefaultConfig()
config.Token = values[apiTokenEnvVar]
return NewDNSProviderConfig(config)
}
// NewDNSProviderConfig return a DNSProvider instance configured for Vscale.
func NewDNSProviderConfig(config *Config) (*DNSProvider, error) {
if config == nil {
return nil, errors.New("vscale: the configuration of the DNS provider is nil")
}
if config.Token == "" {
return nil, errors.New("vscale: credentials missing")
}
if config.TTL < minTTL {
return nil, fmt.Errorf("vscale: invalid TTL, TTL (%d) must be greater than %d", config.TTL, minTTL)
}
client := internal.NewClient(internal.ClientOpts{
BaseURL: config.BaseURL,
Token: config.Token,
HTTPClient: config.HTTPClient,
})
return &DNSProvider{config: config, client: client}, 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 DNS-01 challenge.
func (d *DNSProvider) Present(domain, token, keyAuth string) error {
fqdn, value := dns01.GetRecord(domain, keyAuth)
domainObj, err := d.client.GetDomainByName(domain)
if err != nil {
return fmt.Errorf("vscale: %v", err)
}
txtRecord := internal.Record{
Type: "TXT",
TTL: d.config.TTL,
Name: fqdn,
Content: value,
}
_, err = d.client.AddRecord(domainObj.ID, txtRecord)
if err != nil {
return fmt.Errorf("vscale: %v", err)
}
return nil
}
// CleanUp removes a TXT record used for DNS-01 challenge.
func (d *DNSProvider) CleanUp(domain, token, keyAuth string) error {
fqdn, _ := dns01.GetRecord(domain, keyAuth)
recordName := dns01.UnFqdn(fqdn)
domainObj, err := d.client.GetDomainByName(domain)
if err != nil {
return fmt.Errorf("vscale: %v", err)
}
records, err := d.client.ListRecords(domainObj.ID)
if err != nil {
return fmt.Errorf("vscale: %v", err)
}
// Delete records with specific FQDN
var lastErr error
for _, record := range records {
if record.Name == recordName {
err = d.client.DeleteRecord(domainObj.ID, record.ID)
if err != nil {
lastErr = fmt.Errorf("vscale: %v", err)
}
}
}
return lastErr
}