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83 lines
2.9 KiB
Go
83 lines
2.9 KiB
Go
package repository
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import (
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"context"
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"fmt"
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"time"
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"github.com/Wei-Shaw/sub2api/internal/service"
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"github.com/redis/go-redis/v9"
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)
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const (
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stickySessionPrefix = "sticky_session:"
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cascadeIDPrefix = "windsurf_cascade:"
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)
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type gatewayCache struct {
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rdb *redis.Client
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}
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func NewGatewayCache(rdb *redis.Client) service.GatewayCache {
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return &gatewayCache{rdb: rdb}
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}
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// buildSessionKey 构建 session key，包含 groupID 实现分组隔离
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// 格式: sticky_session:{groupID}:{sessionHash}
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func buildSessionKey(groupID int64, sessionHash string) string {
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return fmt.Sprintf("%s%d:%s", stickySessionPrefix, groupID, sessionHash)
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}
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func (c *gatewayCache) GetSessionAccountID(ctx context.Context, groupID int64, sessionHash string) (int64, error) {
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key := buildSessionKey(groupID, sessionHash)
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return c.rdb.Get(ctx, key).Int64()
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}
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func (c *gatewayCache) SetSessionAccountID(ctx context.Context, groupID int64, sessionHash string, accountID int64, ttl time.Duration) error {
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key := buildSessionKey(groupID, sessionHash)
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return c.rdb.Set(ctx, key, accountID, ttl).Err()
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}
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func (c *gatewayCache) RefreshSessionTTL(ctx context.Context, groupID int64, sessionHash string, ttl time.Duration) error {
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key := buildSessionKey(groupID, sessionHash)
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return c.rdb.Expire(ctx, key, ttl).Err()
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}
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// DeleteSessionAccountID 删除粘性会话与账号的绑定关系。
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// 当检测到绑定的账号不可用（如状态错误、禁用、不可调度等）时调用，
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// 以便下次请求能够重新选择可用账号。
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//
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// DeleteSessionAccountID removes the sticky session binding for the given session.
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// Called when the bound account becomes unavailable (e.g., error status, disabled,
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// or unschedulable), allowing subsequent requests to select a new available account.
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func (c *gatewayCache) DeleteSessionAccountID(ctx context.Context, groupID int64, sessionHash string) error {
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key := buildSessionKey(groupID, sessionHash)
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return c.rdb.Del(ctx, key).Err()
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}
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// buildCascadeKey 构造 Windsurf Cascade ID 缓存 key。
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// 上层已将 (groupID, accountID, modelUID, lsEndpoint, sessionHash, sysPromptHash) 哈希为单一字符串。
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func buildCascadeKey(key string) string {
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return cascadeIDPrefix + key
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}
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// GetCascadeID 读取 Cascade 会话 ID。redis.Nil 视为未命中（返回空串与 nil）。
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func (c *gatewayCache) GetCascadeID(ctx context.Context, key string) (string, error) {
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v, err := c.rdb.Get(ctx, buildCascadeKey(key)).Result()
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if err == redis.Nil {
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return "", nil
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}
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return v, err
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}
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// SetCascadeID 写入 Cascade 会话 ID。
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func (c *gatewayCache) SetCascadeID(ctx context.Context, key string, cascadeID string, ttl time.Duration) error {
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return c.rdb.Set(ctx, buildCascadeKey(key), cascadeID, ttl).Err()
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}
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// DeleteCascadeID 失效 Cascade 会话 ID。
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func (c *gatewayCache) DeleteCascadeID(ctx context.Context, key string) error {
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return c.rdb.Del(ctx, buildCascadeKey(key)).Err()
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}
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