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GoBlog/httpsCache.go

50 lines
1.0 KiB
Go

package main
import (
"context"
"errors"
"golang.org/x/crypto/acme/autocert"
)
// Make sure the httpsCache type implements the Cache interface
var _ autocert.Cache = (*httpsCache)(nil)
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(ctx context.Context, key string) ([]byte, error) {
if err := c.check(); err != nil {
return nil, err
}
d, err := c.db.retrievePersistentCacheContext(ctx, "https_"+key)
if d == nil && err == nil {
return nil, autocert.ErrCacheMiss
} else if err != nil {
return nil, err
}
return d, nil
}
func (c *httpsCache) Put(ctx context.Context, key string, data []byte) error {
if err := c.check(); err != nil {
return err
}
return c.db.cachePersistentlyContext(ctx, "https_"+key, data)
}
func (c *httpsCache) Delete(ctx context.Context, key string) error {
if err := c.check(); err != nil {
return err
}
return c.db.clearPersistentCacheContext(ctx, "https_"+key)
}