gf/os/gsession/gsession_storage_redis_hashtable.go
2021-09-23 21:23:22 +08:00

161 lines
5.4 KiB
Go

// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package gsession
import (
"context"
"time"
"github.com/gogf/gf/container/gmap"
"github.com/gogf/gf/database/gredis"
"github.com/gogf/gf/internal/intlog"
"github.com/gogf/gf/util/gconv"
)
// StorageRedisHashTable implements the Session Storage interface with redis hash table.
type StorageRedisHashTable struct {
redis *gredis.Redis // Redis client for session storage.
prefix string // Redis key prefix for session id.
}
// NewStorageRedisHashTable creates and returns a redis hash table storage object for session.
func NewStorageRedisHashTable(redis *gredis.Redis, prefix ...string) *StorageRedisHashTable {
if redis == nil {
panic("redis instance for storage cannot be empty")
return nil
}
s := &StorageRedisHashTable{
redis: redis,
}
if len(prefix) > 0 && prefix[0] != "" {
s.prefix = prefix[0]
}
return s
}
// New creates a session id.
// This function can be used for custom session creation.
func (s *StorageRedisHashTable) New(ctx context.Context, ttl time.Duration) (id string, err error) {
return "", ErrorDisabled
}
// Get retrieves session value with given key.
// It returns nil if the key does not exist in the session.
func (s *StorageRedisHashTable) Get(ctx context.Context, id string, key string) (value interface{}, err error) {
v, err := s.redis.Do(ctx, "HGET", s.key(id), key)
if err != nil {
return nil, err
}
if v.IsNil() {
return nil, nil
}
return v.String(), nil
}
// GetMap retrieves all key-value pairs as map from storage.
func (s *StorageRedisHashTable) GetMap(ctx context.Context, id string) (data map[string]interface{}, err error) {
v, err := s.redis.Do(ctx, "HGETALL", s.key(id))
if err != nil {
return nil, err
}
data = make(map[string]interface{})
array := v.Interfaces()
for i := 0; i < len(array); i += 2 {
if array[i+1] != nil {
data[gconv.String(array[i])] = gconv.String(array[i+1])
} else {
data[gconv.String(array[i])] = array[i+1]
}
}
return data, nil
}
// GetSize retrieves the size of key-value pairs from storage.
func (s *StorageRedisHashTable) GetSize(ctx context.Context, id string) (size int, err error) {
r, err := s.redis.Do(ctx, "HLEN", s.key(id))
if err != nil {
return -1, err
}
return r.Int(), nil
}
// Set sets key-value session pair to the storage.
// The parameter `ttl` specifies the TTL for the session id (not for the key-value pair).
func (s *StorageRedisHashTable) Set(ctx context.Context, id string, key string, value interface{}, ttl time.Duration) error {
_, err := s.redis.Do(ctx, "HSET", s.key(id), key, value)
return err
}
// SetMap batch sets key-value session pairs with map to the storage.
// The parameter `ttl` specifies the TTL for the session id(not for the key-value pair).
func (s *StorageRedisHashTable) SetMap(ctx context.Context, id string, data map[string]interface{}, ttl time.Duration) error {
array := make([]interface{}, len(data)*2+1)
array[0] = s.key(id)
index := 1
for k, v := range data {
array[index] = k
array[index+1] = v
index += 2
}
_, err := s.redis.Do(ctx, "HMSET", array...)
return err
}
// Remove deletes key with its value from storage.
func (s *StorageRedisHashTable) Remove(ctx context.Context, id string, key string) error {
_, err := s.redis.Do(ctx, "HDEL", s.key(id), key)
return err
}
// RemoveAll deletes all key-value pairs from storage.
func (s *StorageRedisHashTable) RemoveAll(ctx context.Context, id string) error {
_, err := s.redis.Do(ctx, "DEL", s.key(id))
return err
}
// GetSession returns the session data as *gmap.StrAnyMap for given session id from storage.
//
// The parameter `ttl` specifies the TTL for this session, and it returns nil if the TTL is exceeded.
// The parameter `data` is the current old session data stored in memory,
// and for some storage it might be nil if memory storage is disabled.
//
// This function is called ever when session starts.
func (s *StorageRedisHashTable) GetSession(ctx context.Context, id string, ttl time.Duration, data *gmap.StrAnyMap) (*gmap.StrAnyMap, error) {
intlog.Printf(ctx, "StorageRedisHashTable.GetSession: %s, %v", id, ttl)
r, err := s.redis.Do(ctx, "EXISTS", s.key(id))
if err != nil {
return nil, err
}
if r.Bool() {
return gmap.NewStrAnyMap(true), nil
}
return nil, nil
}
// SetSession updates the data map for specified session id.
// This function is called ever after session, which is changed dirty, is closed.
// This copy all session data map from memory to storage.
func (s *StorageRedisHashTable) SetSession(ctx context.Context, id string, data *gmap.StrAnyMap, ttl time.Duration) error {
intlog.Printf(ctx, "StorageRedisHashTable.SetSession: %s, %v", id, ttl)
_, err := s.redis.Do(ctx, "EXPIRE", s.key(id), int64(ttl.Seconds()))
return err
}
// UpdateTTL updates the TTL for specified session id.
// This function is called ever after session, which is not dirty, is closed.
// It just adds the session id to the async handling queue.
func (s *StorageRedisHashTable) UpdateTTL(ctx context.Context, id string, ttl time.Duration) error {
intlog.Printf(ctx, "StorageRedisHashTable.UpdateTTL: %s, %v", id, ttl)
_, err := s.redis.Do(ctx, "EXPIRE", s.key(id), int64(ttl.Seconds()))
return err
}
func (s *StorageRedisHashTable) key(id string) string {
return s.prefix + id
}