92 lines
1.7 KiB
Go
92 lines
1.7 KiB
Go
// Package redis provides simple Redis cache functions.
|
|
package redis
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"code.nonshy.com/nonshy/website/pkg/log"
|
|
"github.com/go-redis/redis/v8"
|
|
)
|
|
|
|
var ctx = context.Background()
|
|
|
|
var Client *redis.Client
|
|
|
|
/*
|
|
Setup the Redis connection.
|
|
|
|
The addr format is like:
|
|
|
|
- localhost:6379
|
|
- localhost:6379/6
|
|
|
|
The latter format to specify the DB number if not the default (0).
|
|
*/
|
|
func Setup(addr string) error {
|
|
// Parse the addr string.
|
|
parts := strings.Split(addr, "/")
|
|
addr = parts[0]
|
|
db := 0
|
|
if len(parts) > 1 && len(parts[1]) > 0 {
|
|
a, err := strconv.Atoi(parts[1])
|
|
if err != nil {
|
|
return fmt.Errorf("redis DB number was not an integer: %s", err)
|
|
}
|
|
db = a
|
|
}
|
|
|
|
Client = redis.NewClient(&redis.Options{
|
|
Addr: addr,
|
|
DB: db,
|
|
})
|
|
return nil
|
|
}
|
|
|
|
// Set a JSON serializable object in Redis.
|
|
func Set(key string, v interface{}, expire time.Duration) error {
|
|
bin, err := json.Marshal(v)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
log.Debug("redis.Set(%s): %s", key, bin)
|
|
|
|
_, err = Client.Set(ctx, key, bin, expire).Result()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Get a JSON serialized value out of Redis.
|
|
func Get(key string, v any) error {
|
|
val, err := Client.Get(ctx, key).Result()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
log.Debug("redis.Get(%s): %s", key, val)
|
|
return json.Unmarshal([]byte(val), v)
|
|
}
|
|
|
|
// Exists checks if a Redis key existed.
|
|
func Exists(key string) bool {
|
|
val, err := Client.Exists(ctx, key).Result()
|
|
if err != nil {
|
|
return false
|
|
}
|
|
log.Debug("redis.Exists(%s): %d", key, val)
|
|
return val == 1
|
|
}
|
|
|
|
// Delete a key from Redis.
|
|
func Delete(key string) error {
|
|
return Client.Del(ctx, key).Err()
|
|
}
|