实现access_token获取

cache/memcache.go

@@ -0,0 +1,51 @@
+package cache
+
+import (
+	"errors"
+	"time"
+
+	"github.com/bradfitz/gomemcache/memcache"
+)
+
+//Memcache struct contains *memcache.Client
+type Memcache struct {
+	conn *memcache.Client
+}
+
+//NewMemcache create new memcache
+func NewMemcache(server ...string) *Memcache {
+	mc := memcache.New(server...)
+	return &Memcache{mc}
+}
+
+//Get return cached value
+func (mem *Memcache) Get(key string) interface{} {
+	if item, err := mem.conn.Get(key); err == nil {
+		return string(item.Value)
+	}
+	return nil
+}
+
+// IsExist check value exists in memcache.
+func (mem *Memcache) IsExist(key string) bool {
+	_, err := mem.conn.Get(key)
+	if err != nil {
+		return false
+	}
+	return true
+}
+
+//Set cached value with key and expire time.
+func (mem *Memcache) Set(key string, val interface{}, timeout time.Duration) error {
+	v, ok := val.(string)
+	if !ok {
+		return errors.New("val must string")
+	}
+	item := &memcache.Item{Key: key, Value: []byte(v), Expiration: int32(timeout / time.Second)}
+	return mem.conn.Set(item)
+}
+
+//Delete delete value in memcache.
+func (mem *Memcache) Delete(key string) error {
+	return mem.conn.Delete(key)
+}