vendor files

vendor/github.com/gregjones/httpcache/memcache/memcache.go

@@ -0,0 +1,60 @@
+// +build !appengine
+
+// Package memcache provides an implementation of httpcache.Cache that uses
+// gomemcache to store cached responses.
+//
+// When built for Google App Engine, this package will provide an
+// implementation that uses App Engine's memcache service.  See the
+// appengine.go file in this package for details.
+package memcache
+
+import (
+	"github.com/bradfitz/gomemcache/memcache"
+)
+
+// Cache is an implementation of httpcache.Cache that caches responses in a
+// memcache server.
+type Cache struct {
+	*memcache.Client
+}
+
+// cacheKey modifies an httpcache key for use in memcache.  Specifically, it
+// prefixes keys to avoid collision with other data stored in memcache.
+func cacheKey(key string) string {
+	return "httpcache:" + key
+}
+
+// Get returns the response corresponding to key if present.
+func (c *Cache) Get(key string) (resp []byte, ok bool) {
+	item, err := c.Client.Get(cacheKey(key))
+	if err != nil {
+		return nil, false
+	}
+	return item.Value, true
+}
+
+// Set saves a response to the cache as key.
+func (c *Cache) Set(key string, resp []byte) {
+	item := &memcache.Item{
+		Key:   cacheKey(key),
+		Value: resp,
+	}
+	c.Client.Set(item)
+}
+
+// Delete removes the response with key from the cache.
+func (c *Cache) Delete(key string) {
+	c.Client.Delete(cacheKey(key))
+}
+
+// New returns a new Cache using the provided memcache server(s) with equal
+// weight. If a server is listed multiple times, it gets a proportional amount
+// of weight.
+func New(server ...string) *Cache {
+	return NewWithClient(memcache.New(server...))
+}
+
+// NewWithClient returns a new Cache with the given memcache client.
+func NewWithClient(client *memcache.Client) *Cache {
+	return &Cache{client}
+}