traefik/acme/challenge_http_provider.go
2018-01-15 16:04:05 +01:00

92 lines
2.5 KiB
Go

package acme
import (
"fmt"
"sync"
"time"
"github.com/cenk/backoff"
"github.com/containous/traefik/cluster"
"github.com/containous/traefik/log"
"github.com/containous/traefik/safe"
"github.com/xenolf/lego/acme"
)
var _ acme.ChallengeProviderTimeout = (*challengeHTTPProvider)(nil)
type challengeHTTPProvider struct {
store cluster.Store
lock sync.RWMutex
}
func (c *challengeHTTPProvider) getTokenValue(token, domain string) []byte {
log.Debugf("Looking for an existing ACME challenge for token %v...", token)
c.lock.RLock()
defer c.lock.RUnlock()
account := c.store.Get().(*Account)
if account.HTTPChallenge == nil {
return []byte{}
}
var result []byte
operation := func() error {
var ok bool
if result, ok = account.HTTPChallenge[token][domain]; !ok {
return fmt.Errorf("cannot find challenge for token %v", token)
}
return nil
}
notify := func(err error, time time.Duration) {
log.Errorf("Error getting challenge for token retrying in %s", time)
}
ebo := backoff.NewExponentialBackOff()
ebo.MaxElapsedTime = 60 * time.Second
err := backoff.RetryNotify(safe.OperationWithRecover(operation), ebo, notify)
if err != nil {
log.Errorf("Error getting challenge for token: %v", err)
return []byte{}
}
return result
}
func (c *challengeHTTPProvider) Present(domain, token, keyAuth string) error {
log.Debugf("Challenge Present %s", domain)
c.lock.Lock()
defer c.lock.Unlock()
transaction, object, err := c.store.Begin()
if err != nil {
return err
}
account := object.(*Account)
if account.HTTPChallenge == nil {
account.HTTPChallenge = map[string]map[string][]byte{}
}
if _, ok := account.HTTPChallenge[token]; !ok {
account.HTTPChallenge[token] = map[string][]byte{}
}
account.HTTPChallenge[token][domain] = []byte(keyAuth)
return transaction.Commit(account)
}
func (c *challengeHTTPProvider) CleanUp(domain, token, keyAuth string) error {
log.Debugf("Challenge CleanUp %s", domain)
c.lock.Lock()
defer c.lock.Unlock()
transaction, object, err := c.store.Begin()
if err != nil {
return err
}
account := object.(*Account)
if _, ok := account.HTTPChallenge[token]; ok {
if _, domainOk := account.HTTPChallenge[token][domain]; domainOk {
delete(account.HTTPChallenge[token], domain)
}
if len(account.HTTPChallenge[token]) == 0 {
delete(account.HTTPChallenge, token)
}
}
return transaction.Commit(account)
}
func (c *challengeHTTPProvider) Timeout() (timeout, interval time.Duration) {
return 60 * time.Second, 5 * time.Second
}