func StartPeriodicStateBackup(m *letsencrypt.Manager) {
for range m.Watch() {
// First run will call a cache save that overwrites with null data
if LE_FIRSTRUN {
log.Info("[SSL] State change detected, storing")
StoreLEState(m)
}
LE_FIRSTRUN = true
}
}
// Cache caches letsencrypt data for the given Manager in the Google Cloud
// Storage object identified by the getURL and putURL values.
// See the package comment for details on obtaining these values.
func Cache(m *letsencrypt.Manager, getURL, putURL string) error {
var data []byte
r, err := http.Get(getURL)
if err != nil {
return fmt.Errorf("letscloud: reading cache: %v", err)
}
data, err = ioutil.ReadAll(r.Body)
r.Body.Close()
if err != nil {
return fmt.Errorf("letscloud: reading cache: %v", err)
}
if r.StatusCode == http.StatusOK && len(data) > 0 {
if err := m.Unmarshal(string(data)); err != nil {
return fmt.Errorf("letscloud: reading cache: %v", err)
}
}
go func() {
for range m.Watch() {
req, err := http.NewRequest("PUT", putURL, strings.NewReader(m.Marshal()))
if err != nil {
log.Printf("letscloud: writing cache: %v", err)
continue
}
r, err := http.DefaultClient.Do(req)
if err != nil {
log.Printf("letscloud: writing cache: %v", err)
continue
}
if r.StatusCode != http.StatusOK {
log.Printf("letscloud: writing cache: %v", r.Status)
}
}
}()
return nil
}