feat: Add response-cache plugin (#3061)

Co-authored-by: mirror58229 <674958229@qq.com>

plugins/wasm-go/extensions/response-cache/cache/redis.go

@@ -0,0 +1,65 @@
+package cache
+
+import (
+	"errors"
+
+	"github.com/higress-group/wasm-go/pkg/log"
+	"github.com/higress-group/wasm-go/pkg/wrapper"
+)
+
+type redisProviderInitializer struct {
+}
+
+func (r *redisProviderInitializer) ValidateConfig(cf ProviderConfig) error {
+	if len(cf.serviceName) == 0 {
+		return errors.New("cache service name is required")
+	}
+	return nil
+}
+
+func (r *redisProviderInitializer) CreateProvider(cf ProviderConfig) (Provider, error) {
+	rp := redisProvider{
+		config: cf,
+		client: wrapper.NewRedisClusterClient(wrapper.FQDNCluster{
+			FQDN: cf.serviceName,
+			Host: cf.serviceHost,
+			Port: int64(cf.servicePort)}),
+	}
+	err := rp.Init(cf.username, cf.password, cf.timeout)
+	return &rp, err
+}
+
+type redisProvider struct {
+	config ProviderConfig
+	client wrapper.RedisClient
+}
+
+func (rp *redisProvider) GetProviderType() string {
+	return PROVIDER_TYPE_REDIS
+}
+
+func (rp *redisProvider) Init(username string, password string, timeout uint32) error {
+	err := rp.client.Init(rp.config.username, rp.config.password, int64(rp.config.timeout))
+	if rp.client.Ready() {
+		log.Info("redis init successfully")
+	} else {
+		log.Error("redis init failed, will try later")
+	}
+	return err
+}
+
+func (rp *redisProvider) Get(key string, cb wrapper.RedisResponseCallback) error {
+	return rp.client.Get(key, cb)
+}
+
+func (rp *redisProvider) Set(key string, value string, cb wrapper.RedisResponseCallback) error {
+	if rp.config.cacheTTL == 0 {
+		return rp.client.Set(key, value, cb)
+	} else {
+		return rp.client.SetEx(key, value, rp.config.cacheTTL, cb)
+	}
+}
+
+func (rp *redisProvider) GetCacheKeyPrefix() string {
+	return rp.config.cacheKeyPrefix
+}