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// Package memcached implements a HTTP provider for solving the HTTP-01 challenge using memcached
// in combination with a webserver.
package memcached
import (
"fmt"
"path"
"github.com/rainycape/memcache"
"github.com/xenolf/lego/acme"
)
// HTTPProvider implements ChallengeProvider for `http-01` challenge
type MemcachedProvider struct {
hosts []string
}
// NewHTTPProvider returns a HTTPProvider instance with a configured webroot path
func NewMemcachedProvider(hosts []string) (*MemcachedProvider, error) {
if len(hosts) == 0 {
return nil, fmt.Errorf("No memcached hosts provided")
}
c := &MemcachedProvider{
hosts: hosts,
}
return c, nil
}
// Present makes the token available at `HTTP01ChallengePath(token)` by creating a file in the given webroot path
func (w *MemcachedProvider) Present(domain, token, keyAuth string) error {
var errs []error
challengePath := path.Join("/", acme.HTTP01ChallengePath(token))
for _, host := range w.hosts {
mc, err := memcache.New(host)
if err != nil {
errs = append(errs, err)
continue
}
mc.Add(&memcache.Item{
Key: challengePath,
Value: []byte(keyAuth),
Expiration: 60,
})
}
if len(errs) == len(w.hosts) {
return fmt.Errorf("Unable to store key in any of the memcache hosts -> %v", errs)
}
return nil
}
// CleanUp removes the file created for the challenge
func (w *MemcachedProvider) CleanUp(domain, token, keyAuth string) error {
// Memcached will clean up itself, that's what expiration is for.
return nil
}
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