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// Package redis provides a redis interface for http caching.
package redis
import (
"github.com/garyburd/redigo/redis"
"github.com/gregjones/httpcache"
)
// cache is an implementation of httpcache.Cache that caches responses in a
// redis server.
type cache struct {
redis.Conn
}
// cacheKey modifies an httpcache key for use in redis. Specifically, it
// prefixes keys to avoid collision with other data stored in redis.
func cacheKey(key string) string {
return "rediscache:" + key
}
// Get returns the response corresponding to key if present.
func (c cache) Get(key string) (resp []byte, ok bool) {
item, err := redis.Bytes(c.Do("GET", cacheKey(key)))
if err != nil {
return nil, false
}
return item, true
}
// Set saves a response to the cache as key.
func (c cache) Set(key string, resp []byte) {
c.Do("SET", cacheKey(key), resp)
}
// Delete removes the response with key from the cache.
func (c cache) Delete(key string) {
c.Do("DEL", cacheKey(key))
}
// NewWithClient returns a new Cache with the given redis connection.
func NewWithClient(client redis.Conn) httpcache.Cache {
return cache{client}
}
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