ots/storage_redis.go

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package main
import (
"context"
"fmt"
"os"
"strings"
"time"
"github.com/gofrs/uuid/v3"
"github.com/pkg/errors"
redis "github.com/redis/go-redis/v9"
)
const redisDefaultPrefix = "io.luzifer.ots"
type storageRedis struct {
conn *redis.Client
}
func newStorageRedis() (storage, error) {
if os.Getenv("REDIS_URL") == "" {
return nil, fmt.Errorf("REDIS_URL environment variable not set")
}
// We replace the old URI format
// tcp://auth:password@127.0.0.1:6379/0
// with the new one
// redis://<user>:<password>@<host>:<port>/<db_number>
// in order to maintain backwards compatibility
opt, err := redis.ParseURL(strings.Replace(os.Getenv("REDIS_URL"), "tcp://", "redis://", 1))
if err != nil {
return nil, errors.Wrap(err, "parsing REDIS_URL")
}
s := &storageRedis{
conn: redis.NewClient(opt),
}
return s, nil
}
func (s storageRedis) Create(secret string, expireIn time.Duration) (string, error) {
id := uuid.Must(uuid.NewV4()).String()
err := s.conn.SetEx(context.Background(), s.redisKey(id), secret, expireIn).Err()
return id, errors.Wrap(err, "writing redis key")
}
func (s storageRedis) ReadAndDestroy(id string) (string, error) {
secret, err := s.conn.Get(context.Background(), s.redisKey(id)).Result()
if err != nil {
if errors.Is(err, redis.Nil) {
return "", errSecretNotFound
}
return "", err
}
err = s.conn.Del(context.Background(), s.redisKey(id)).Err()
return string(secret), errors.Wrap(err, "deleting key")
}
func (s storageRedis) redisKey(id string) string {
prefix := redisDefaultPrefix
if prfx := os.Getenv("REDIS_KEY"); prfx != "" {
prefix = prfx
}
return strings.Join([]string{prefix, id}, ":")
}