87 lines
2.3 KiB
Go
87 lines
2.3 KiB
Go
package acme
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import (
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"net"
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"net/http"
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"time"
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"github.com/cenk/backoff"
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"github.com/containous/mux"
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"github.com/containous/traefik/log"
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"github.com/containous/traefik/safe"
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"github.com/xenolf/lego/acme"
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)
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var _ acme.ChallengeProviderTimeout = (*challengeHTTP)(nil)
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type challengeHTTP struct {
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Store Store
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}
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// Present presents a challenge to obtain new ACME certificate
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func (c *challengeHTTP) Present(domain, token, keyAuth string) error {
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return c.Store.SetHTTPChallengeToken(token, domain, []byte(keyAuth))
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}
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// CleanUp cleans the challenges when certificate is obtained
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func (c *challengeHTTP) CleanUp(domain, token, keyAuth string) error {
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return c.Store.RemoveHTTPChallengeToken(token, domain)
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}
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// Timeout calculates the maximum of time allowed to resolved an ACME challenge
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func (c *challengeHTTP) Timeout() (timeout, interval time.Duration) {
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return 60 * time.Second, 5 * time.Second
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}
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func getTokenValue(token, domain string, store Store) []byte {
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log.Debugf("Looking for an existing ACME challenge for token %v...", token)
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var result []byte
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operation := func() error {
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var err error
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result, err = store.GetHTTPChallengeToken(token, domain)
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return err
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}
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notify := func(err error, time time.Duration) {
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log.Errorf("Error getting challenge for token retrying in %s", time)
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}
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ebo := backoff.NewExponentialBackOff()
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ebo.MaxElapsedTime = 60 * time.Second
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err := backoff.RetryNotify(safe.OperationWithRecover(operation), ebo, notify)
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if err != nil {
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log.Errorf("Error getting challenge for token: %v", err)
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return []byte{}
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}
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return result
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}
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// AddRoutes add routes on internal router
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func (p *Provider) AddRoutes(router *mux.Router) {
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router.Methods(http.MethodGet).
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Path(acme.HTTP01ChallengePath("{token}")).
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Handler(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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vars := mux.Vars(req)
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if token, ok := vars["token"]; ok {
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domain, _, err := net.SplitHostPort(req.Host)
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if err != nil {
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log.Debugf("Unable to split host and port: %v. Fallback to request host.", err)
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domain = req.Host
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}
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tokenValue := getTokenValue(token, domain, p.Store)
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if len(tokenValue) > 0 {
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rw.WriteHeader(http.StatusOK)
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_, err = rw.Write(tokenValue)
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if err != nil {
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log.Errorf("Unable to write token : %v", err)
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}
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return
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}
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}
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rw.WriteHeader(http.StatusNotFound)
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}))
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}
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