package pkg
import (
"encoding/json"
"net/http"
"time"
"github.com/allegro/bigcache"
"github.com/eko/gocache/cache"
"github.com/eko/gocache/store"
"github.com/go-redis/redis/v7"
"golang.org/x/xerrors"
)
type CacheObject struct {
Header http.Header
Body []byte
StatusCode int
}
func (cacheObj *CacheObject) ToJson() ([]byte, error) {
b, err := json.Marshal(cacheObj)
if err != nil {
return nil, xerrors.Errorf("cannot convert cache object to JSON: %v", err)
}
return b, nil
}
func (cacheObj *CacheObject) FromJson(v []byte) error {
err := json.Unmarshal(v, cacheObj)
if err != nil {
return xerrors.Errorf("cannot convert cache object from JSON: %v", err)
}
return nil
}
func (o *OpenVSXProxy) SetupCache() error {
var cacheStore store.StoreInterface
if o.Config.RedisEnabled() {
redisClient := redis.NewClient(&redis.Options{Addr: o.Config.RedisAddr})
cacheStore = store.NewRedis(redisClient, nil)
} else {
bigcacheClient, err := bigcache.NewBigCache(bigcache.DefaultConfig(time.Duration(o.Config.CacheDurationBackup)))
if err != nil {
return err
}
cacheStore = store.NewBigcache(bigcacheClient, nil)
}
o.cacheManager = cache.New(cacheStore)
return nil
}
func (o *OpenVSXProxy) StoreCache(key string, obj *CacheObject) error {
b, err := obj.ToJson()
if err != nil {
return err
}
if o.Config.RedisEnabled() {
return o.cacheManager.Set(key, string(b), nil)
}
return o.cacheManager.Set(key, b, nil)
}
func (o *OpenVSXProxy) ReadCache(key string) (obj *CacheObject, ok bool, err error) {
b, err := o.cacheManager.Get(key)
if err == bigcache.ErrEntryNotFound || err == redis.Nil {
return nil, false, nil
} else if err != nil || b == nil {
return
}
var bb []byte
if o.Config.RedisEnabled() {
bb = []byte(b.(string))
} else {
bb = b.([]byte)
}
obj = &CacheObject{}
if err = obj.FromJson(bb); err != nil {
return
}
ok = true
return
}
