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package main
import (
"context"
"database/sql"
"errors"
"golang.org/x/crypto/acme/autocert"
)
// Make sure the httpsCache type implements the Cache interface
var _ autocert.Cache = &httpsCache{}
type httpsCache struct {
db *database
}
func (c *httpsCache) check() error {
if c.db == nil {
return errors.New("no database")
}
return nil
}
func (c *httpsCache) Get(_ context.Context, key string) ([]byte, error) {
if err := c.check(); err != nil {
return nil, err
}
d, err := c.db.retrievePersistentCache("https_" + key)
if errors.Is(err, sql.ErrNoRows) {
return nil, autocert.ErrCacheMiss
} else if err != nil {
return nil, err
}
return d, nil
}
func (c *httpsCache) Put(_ context.Context, key string, data []byte) error {
if err := c.check(); err != nil {
return err
}
return c.db.cachePersistently("https_"+key, data)
}
func (c *httpsCache) Delete(_ context.Context, key string) error {
if err := c.check(); err != nil {
return err
}
return c.db.clearPersistentCache("https_" + key)
}