Add Expired for simplecache.

flickr/flickr.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"net/http"
 	"net/url"
+	"time"
 
 	"github.com/toomore/lazyflickrgo/simplecache"
 	"github.com/toomore/lazyflickrgo/utils"
@@ -22,8 +23,8 @@ var tempDir string
 var cache *simplecache.SimlpleCache
 
 func init() {
-	cache = simplecache.NewSimpleCache("", "lzf")
-	log.Println("Temp Dir: ", cache.Dir, cache.Folder)
+	cache = simplecache.NewSimpleCache("", "lzf", 24*time.Hour)
+	log.Printf("Temp Dir: %s/%s, Expired: %s\n", cache.Dir, cache.Folder, cache.Expired)
 }
 
 // NewFlickr is to new a request.

simplecache/simplecache.go

@@ -1,21 +1,24 @@
 package simplecache
 
 import (
+	"errors"
 	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
+	"time"
 )
 
 // SimlpleCache struct
 type SimlpleCache struct {
 	Folder   string
 	Dir      string
+	Expired  time.Duration
 	fullpath string
 }
 
 // NewSimpleCache new a SimlpleCache
-func NewSimpleCache(Dir, Folder string) *SimlpleCache {
+func NewSimpleCache(Dir, Folder string, Expired time.Duration) *SimlpleCache {
 	if Dir == "" {
 		Dir = getOSRamdiskPath()
 	}
@@ -30,6 +33,7 @@ func NewSimpleCache(Dir, Folder string) *SimlpleCache {
 	return &SimlpleCache{
 		Dir:      Dir,
 		Folder:   Folder,
+		Expired:  Expired,
 		fullpath: fullpath,
 	}
 }
@@ -39,6 +43,9 @@ func (s *SimlpleCache) Get(name string) ([]byte, error) {
 	var err error
 	if file, err := os.Open(filepath.Join(s.fullpath, name)); err == nil {
 		defer file.Close()
+		if stat, _ := file.Stat(); time.Now().Sub(stat.ModTime()) > s.Expired {
+			return nil, errors.New("Cache expired.")
+		}
 		return ioutil.ReadAll(file)
 	}
 	return nil, err