Added all required dependencies

vendor/github.com/go-macaron/cache/redis/redis.go

@@ -0,0 +1,178 @@
+// Copyright 2013 Beego Authors
+// Copyright 2014 The Macaron Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package cache
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/Unknwon/com"
+	"gopkg.in/ini.v1"
+	"gopkg.in/redis.v2"
+
+	"github.com/go-macaron/cache"
+)
+
+// RedisCacher represents a redis cache adapter implementation.
+type RedisCacher struct {
+	c          *redis.Client
+	prefix     string
+	hsetName   string
+	occupyMode bool
+}
+
+// Put puts value into cache with key and expire time.
+// If expired is 0, it lives forever.
+func (c *RedisCacher) Put(key string, val interface{}, expire int64) error {
+	key = c.prefix + key
+	if expire == 0 {
+		if err := c.c.Set(key, com.ToStr(val)).Err(); err != nil {
+			return err
+		}
+	} else {
+		dur, err := time.ParseDuration(com.ToStr(expire) + "s")
+		if err != nil {
+			return err
+		}
+		if err = c.c.SetEx(key, dur, com.ToStr(val)).Err(); err != nil {
+			return err
+		}
+	}
+
+	if c.occupyMode {
+		return nil
+	}
+	return c.c.HSet(c.hsetName, key, "0").Err()
+}
+
+// Get gets cached value by given key.
+func (c *RedisCacher) Get(key string) interface{} {
+	val, err := c.c.Get(c.prefix + key).Result()
+	if err != nil {
+		return nil
+	}
+	return val
+}
+
+// Delete deletes cached value by given key.
+func (c *RedisCacher) Delete(key string) error {
+	key = c.prefix + key
+	if err := c.c.Del(key).Err(); err != nil {
+		return err
+	}
+
+	if c.occupyMode {
+		return nil
+	}
+	return c.c.HDel(c.hsetName, key).Err()
+}
+
+// Incr increases cached int-type value by given key as a counter.
+func (c *RedisCacher) Incr(key string) error {
+	if !c.IsExist(key) {
+		return fmt.Errorf("key '%s' not exist", key)
+	}
+	return c.c.Incr(c.prefix + key).Err()
+}
+
+// Decr decreases cached int-type value by given key as a counter.
+func (c *RedisCacher) Decr(key string) error {
+	if !c.IsExist(key) {
+		return fmt.Errorf("key '%s' not exist", key)
+	}
+	return c.c.Decr(c.prefix + key).Err()
+}
+
+// IsExist returns true if cached value exists.
+func (c *RedisCacher) IsExist(key string) bool {
+	if c.c.Exists(c.prefix + key).Val() {
+		return true
+	}
+
+	if !c.occupyMode {
+		c.c.HDel(c.hsetName, c.prefix+key)
+	}
+	return false
+}
+
+// Flush deletes all cached data.
+func (c *RedisCacher) Flush() error {
+	if c.occupyMode {
+		return c.c.FlushDb().Err()
+	}
+
+	keys, err := c.c.HKeys(c.hsetName).Result()
+	if err != nil {
+		return err
+	}
+	if err = c.c.Del(keys...).Err(); err != nil {
+		return err
+	}
+	return c.c.Del(c.hsetName).Err()
+}
+
+// StartAndGC starts GC routine based on config string settings.
+// AdapterConfig: network=tcp,addr=:6379,password=macaron,db=0,pool_size=100,idle_timeout=180,hset_name=MacaronCache,prefix=cache:
+func (c *RedisCacher) StartAndGC(opts cache.Options) error {
+	c.hsetName = "MacaronCache"
+	c.occupyMode = opts.OccupyMode
+
+	cfg, err := ini.Load([]byte(strings.Replace(opts.AdapterConfig, ",", "\n", -1)))
+	if err != nil {
+		return err
+	}
+
+	opt := &redis.Options{
+		Network: "tcp",
+	}
+	for k, v := range cfg.Section("").KeysHash() {
+		switch k {
+		case "network":
+			opt.Network = v
+		case "addr":
+			opt.Addr = v
+		case "password":
+			opt.Password = v
+		case "db":
+			opt.DB = com.StrTo(v).MustInt64()
+		case "pool_size":
+			opt.PoolSize = com.StrTo(v).MustInt()
+		case "idle_timeout":
+			opt.IdleTimeout, err = time.ParseDuration(v + "s")
+			if err != nil {
+				return fmt.Errorf("error parsing idle timeout: %v", err)
+			}
+		case "hset_name":
+			c.hsetName = v
+		case "prefix":
+			c.prefix = v
+		default:
+			return fmt.Errorf("session/redis: unsupported option '%s'", k)
+		}
+	}
+
+	c.c = redis.NewClient(opt)
+	if err = c.c.Ping().Err(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func init() {
+	cache.Register("redis", &RedisCacher{})
+}